Model K9-12 FlexShaft™
Drain Cleaning Machine
• Français – 19
• Castellano – pág. 41
K9-12 Manual
RIDGID.com/qr/k9-12
999-995-413.10_REV. E
ii
K9-12 FlexShaft™ Drain Cleaning Machine
Table of Contents
Safety Symbols .................................................................................................................... 2
General Safety Rules
Work Area Safety .............................................................................................................. 2
Electrical Safety ................................................................................................................ 2
Personal Safety ................................................................................................................. 2
Tool Use and Care ............................................................................................................ 3
Service .............................................................................................................................. 3
Specific Safety Information ................................................................................................ 3
FlexShaft Drain Cleaning Machine Safety ........................................................................ 3
RIDGID Contact Information ............................................................................................... 4
Description ........................................................................................................................... 4
Specifications ...................................................................................................................... 5
Specifications - Acceptable Battery Powered Drills .......................................................... 5
Standard Equipment ......................................................................................................... 5
Pre-Operation Inspection .................................................................................................... 5
Machine and Work Area Set-up .......................................................................................... 6
Battery Powered Drill Set-up and Operation ..................................................................... 8
Drill Switch ........................................................................................................................ 8
Drill Speed ........................................................................................................................ 8
Drill Adjustable Clutch Setting ........................................................................................... 8
Installing/Adjusting Chain Knocker ................................................................................... 9
Installing Brushes ........................................................................................................... 12
Installing Penetrating Head ............................................................................................. 13
Operating Instructions ...................................................................................................... 13
Using Machine With Brushes .......................................................................................... 16
Draining the Drum .......................................................................................................... 17
Transportation and Storage .............................................................................................. 17
Maintenance Instructions ................................................................................................. 17
Cleaning ......................................................................................................................... 17
Lubrication ...................................................................................................................... 17
Cable Assembly Replacement ........................................................................................ 17
Troubleshooting .............................................................................................................. 18
Service And Repair ......................................................................................................... 18
Optional Equipment .......................................................................................................... 18
Disposal.............................................................................................................................. 18
EC Declaration of Conformity .................................................................. Inside Back Cover
Lifetime Warranty ................................................................................................. Back Cover
*Original Instructions - English
Model K9-12 FlexShaft™
Drain Cleaning Machine
WARNING!
Read this Operator’s Man ual
carefully before using this
tool. Failure to understand
and follow the contents of
this manual may result in
electrical shock, fire and/or
serious person al injury.
Drain Cleaning Machine
K9-12 FlexShaft™ Drain Cleaning Machine
999-995-413.10_REV. E
2
This symbol indicates the risk of hands,
fingers or other body parts being caught,
wrapped or crushed in the drain cleaning
FlexShaft.
Safety Symbols
In this operator’s manual and on the product, safety symbols and signal words are used to
communicate important safety information. This section is provided to improve understand-
ing of these signal words and symbols.
This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey
all safety messages that follow this symbol to avoid possible injury or death.
DANGER indicates a hazardous situation which, if not avoided, will result in death
or serious injury.
WARNING indicates a hazardous situation which, if not avoided, could result in death
or serious injury.
CAUTION indicates a hazardous situation which, if not avoided, could result in minor
or moderate injury.
NOTICE indicates information that relates to the protection of property.
Electrical Safety
• Avoid body contact with earthed or
grounded surfaces such as pipes, ra-
diators, ranges and refrigerators. There
is an increased risk of electrical shock if
your body is earthed or grounded.
• Do not expose power tools to rain or
wet conditions. Water entering a power
tool will increase the risk of electrical
shock.
• If operating a power tool in a damp lo-
cation is unavoidable, use a ground
fault circuit interrupter (GFCI) protected
supply. Use of a GFCI reduces the risk of
electric shock.
Personal Safety
• Stay alert, watch what you are doing
and use common sense when oper-
ating tools. Do not use tools while
you are tired or under the influence of
drugs, alcohol, or medication. A mo-
ment of inattention while operating tools
may result in serious personal injury.
General Safety Rules
WARNING
Read and understand all warnings and
instructions. Failure to follow all warn-
ings and instructions may result in elec-
tric shock, fire, and/or serious injury.
SAVE THESE INSTRUCTIONS!
Work Area Safety
• Keep work area clean and well lit. Clut-
tered or dark areas invite accidents.
• Do not operate tools in explosive at-
mospheres, such as in the presence
of flammable liquids, gases, or dust.
Tools create sparks which may ignite the
dust or fumes.
• Keep children and by-standers away
while operating tools. Distractions can
cause you to lose control.
• Keep floors dry and free of slippery
materials such as oil. Slippery floors
invite accidents.
NOTICE
DANGER
WARNING
CAUTION
This symbol means read the operator’s
manual carefully before using the equip-
ment. The operator’s manual contains im-
portant information on the safe and proper opera-
tion of the equipment.
This symbol means always wear safety
glasses with side shields or goggles while
using this equipment to reduce the risk of
eye injury.
This symbol indicates the risk of the elec-
trical shock.
This symbol indicates the risk of fingers or
other body parts being caught, wrapped,
crushed or struck by the chain knocker.
Do not operate tool with the cable end outside
of the drain.
This symbol means always wear gloves
when handling or using this equipment to
reduce the risk of infections, burns or other
serious personal injury from the drain contents.
K9-12 FlexShaft™ Drain Cleaning Machine
999-995-413.10_REV. E 3
FlexShaft Drain Cleaning
Machine Safety
• Always use safety glasses and gloves
in good condition while handling or
using. Use latex or rubber gloves, face
shields, protective clothing, respirators or
other appropriate protective equipment
when chemicals, bacteria or other toxic
or infectious substances are suspected to
be present to reduce the risk of infections,
burns or other serious personal injury.
• Do not use with a corded drill. Opera-
ting with a corded drill increases the risk
of electrical shock and other injuries.
• Do not allow the chain knocker/end of
cable to stop turning while drill switch
is depressed. This can over-stress the
cable and may cause twisting, kinking or
breaking of the cable assembly and may
result in serious personal injury.
• Practice good hygiene. Do not eat or
smoke while handling or operating the
tool. After handling or operating drain
cleaning equipment, use hot, soapy
water to wash hands and other body
parts exposed to drain contents. This
will help reduce the risk of health hazards
due to exposure to toxic or infectious ma-
terial.
• Only use the FlexShaft Drain Clean-
ing Machine for the recommended
drain sizes. Using the wrong size drain
cleaner can lead to twisting, kinking or
breaking of the cable and may result in
personal injury.
• Keep hand on the cable assembly
whenever the FlexShaft Machine is run-
ning. This provides better control of the
cable and helps prevent twisting, kinking
and breaking of the cable and reduces the
risk of injury.
• Position machine cable outlet within
3' (1 m) of the drain inlet or properly
support exposed cable assembly when
the distance exceeds 3' (1 m). Greater
distances can cause control problems lead-
ing to twisting, kinking or breaking of the
cable. Twisting, kinking or breaking cable
may cause striking or crushing injuries.
• One person must control both the
cable assembly and cordless drill. Do
not lock drill switch in the ON position
during operation. If the cable stops rotat-
ing, the operator must be able to release
the drill switch to prevent twisting, kinking
• Use personal protective equipment.
Always wear eye protection. Protective
equipment such as dust mask, non-skid
safety shoes, hard hat, or hearing protec-
tion used for appropriate conditions will
reduce personal injuries.
• Do not overreach. Keep proper footing
and balance at all times. Proper footing
and balance enables better control of the
tool in unexpected situations.
Tool Use and Care
• Do not force tool. Use the correct tool
for your application. The correct tool will
do the job better and safer at the rate for
which it is designed.
• Store idle tools out of the reach of chil-
dren and do not allow persons unfamil-
iar with the tool or these instructions to
operate the tool. Tools can be dangerous
in the hands of untrained users.
• Maintain tools. Check for misalignment
or binding of moving parts, breakage
of parts and any other condition that
may affect the tool’s op er ation. If dam-
aged, have the tool repaired before use.
Many accidents are caused by poorly
maintained tools.
• Keep handles dry, clean and free from
oil and grease. Allows for better control
of the tool.
Service
• Have your tool serviced by a qualified
repair person using only identical re-
placement parts. This will ensure that
the safety of the tool is maintained.
Specific Safety
Information
WARNING
This section contains important safety
information that is specific to this tool.
Read these precautions carefully be-
fore using the FlexShaft™ Drain Cleaning
Machine to reduce the risk of electrical
shock or other serious injury.
SAVE ALL WARNINGS
AND INSTRUCTIONS FOR
FUTURE REFERENCE!
Keep this manual with machine for use by
the operator.
K9-12 FlexShaft™ Drain Cleaning Machine
999-995-413.10_REV. E
4
blockage and clean the walls of the pipe. The
K9-12 Drain Cleaning Machine contains an
integral clutch that serves as a cable protection
system. This system reduces the likelihood of
cable damage if the chain knockers become
locked or lodged in a blockage.
FlexShaft Drain Cleaner is well suited to use
with inspection cameras during the drain
cleaning process. The FlexShaft Machine is
lightweight and compact for ease of trans-
port.
Figure 1A – RIDGID® K9-12 FlexShaft Drain
Cleaning Machine
Figure 1B – RIDGID® K9-12 FlexShaft Drain
Cleaning Machine
and breaking of the cable and reduce the
risk of injury.
• Do not wear loose clothing or jewelry.
Keep your hair and clothing away from
moving parts. Loose clothing, jewelry or
hair can be caught in moving parts.
• Do not operate this machine if oper-
ator or machine is standing in water.
Operating machine while in water in-
creases the risk of electrical shock.
• Do not use if there is the risk of con-
tact with other utilities (such as natural
gas or electric) during operation. Visual
inspection of the drain with a camera is
a good practice. Crossbores, improperly
placed utilities and damaged drains could
allow the cutter to contact and damage
the utility. This could cause electrical
shock, gas leaks, fire, explosion or other
serious damage or injury.
• Read and understand these instruc-
tions, the battery drill instructions and
the instructions for any other equip-
ment used with this tool before oper-
ating. Failure to follow all instructions may
result in property damage and/or serious
injury.
RIDGID Contact
Information
If you have any question concerning this
RIDGID® product:
– Contact your local RIDGID distributor.
– Visit RIDGID.com to find your local
RIDGID contact point.
– Contact Ridge Tool Technical Service De-
part ment at ProToolsTechService@
Emerson.com, or in the U.S. and Canada
call 844-789-8665.
Description
The RIDGID® Model K9-12 FlexShaft™ Drain
Cleaning Machine, with proper attachments,
is designed to clean and descale 11/4" to 2"
pipes and drain lines for kitchen and bath
sinks, tub/shower drains, laundry and HVAC
lines.
A user supplied battery powered drill is used
to drive the FlexShaft Drain Cleaning Machine.
The K9-12 FlexShaft Drain Cleaning Machine
cable assembly is manually fed in and out of
the drain. A chain knocker that expands to the
pipe inside diameter is used to break up the
Carry Handle
Cable
Cap
Cable
Assembly
Hex Key
Feet
Input
Shaft
Warning &
Operation
Label
Chain
Knocker
Feet
(Horizontal-
Use Position)
QR Code
Weight/Date
Code Label
(European
Units)
K9-12 FlexShaft™ Drain Cleaning Machine
999-995-413.10_REV. E 5
This machine is made to clean
drains. If properly used, it will not damage a
drain that is in good condition and properly
designed, constructed and maintained. If the
drain is in poor condition, or has not been
properly designed, constructed and main-
tained, the drain cleaning process may not be
effective or could cause damage to the drain.
The best way to determine the condition of
a drain before cleaning is through visual in-
spection with a camera. Improper use of this
drain cleaning machine can damage the drain
cleaning machine and the drain. This machine
may not clear all blockages.
Pre-Operation Inspection
WARNING
Before each use, inspect your Drain
Cleaning Machine and correct any prob-
lems to reduce the risk of serious injury
from electric shock, twisted or broken
cables, chemical burns, infections and
other causes and prevent Drain Cleaning
Machine damage.
Always wear safety glasses, and other
appropriate protective equipment when
inspecting your Drain Cleaning Machine.
1. Clean the machine, including handles
and controls. This aids inspection and
helps prevent the machine or control from
slipping from your grip. Clean and main-
tain the machine per the maintenance
instructions.
2. Inspect the machine for:
•
Proper assembly and completeness.
• Any broken, worn, missing, misaligned
or binding parts.
• Presence and readability of the warning
label (see Figure 2).
• Smooth and free movement of the ca-
ble assembly in and out of the machine.
• Any condition which may prevent safe
and normal operation.
If any problems are found, do not use the
drain cleaning machine until the problems
have been repaired.
Specifications
Drain Capacity
(Nominal) ................ 1-1/4" to 2"
(32 – 50 mm)
Cable Diameter
(without Sheath)… .. 1/4" (6 mm)
Cable Assembly Diameter
(with Sheath) .......... 3/8" (9.5 mm)
Cable Assembly
Length..................... 30' (9 m)
Rotational Speed .... Maximum 2500 RPM
Drill Attachment ...... 5/16" Hex (8 mm)
Integral Clutch ........ Non-Adjustable
Weight (without drill
or knocker) .............. 8.4 lbs. (3.8 kg)
Dimensions
(without drill) ........... 4.8" × 12.9" × 15.1"
(122 mm × 328 mm ×
384 mm)
Operating
Temperature ........... 20°F to 140°F
(-6°C to 60°C)
It is not recommended to clean glass, ce-
ramic, porcelain or similar pipe or fixtures
with the FlexShaft Drain Cleaners as it may
damage the pipe or fixture.
Specifications - Acceptable
Battery Powered Drills
Rotational Speed .... 1800 to 2500 RPM
Chuck Size ............. 3/8” (10 mm) or
greater
Drill Clutch .............. Adjustable
Switch Type ............. Momentary Contact
Switch Lock ............ Not equipped
Drill must carry appropriate certification mark
for the market (CE mark, c()us mark, etc.)
Do not use corded drills, hammer drills or
impact drivers. Use of an inappropriate drill
increases the risk of equipment damage and
personal injury. See Battery Powered Drill
Set-up and Operation section.
Standard Equipment
Refer to the RIDGID catalog for details on
equipment supplied with specific drain clean-
ing machine catalog numbers.
NOTICE
K9-12 FlexShaft™ Drain Cleaning Machine
999-995-413.10_REV. E
6
cation. Do not use the Drain Cleaning
Machine while standing in water.
2. Inspect the drain to be cleaned. If possi-
ble, determine the access point(s) to the
drain, the size(s), length(s), and materi-
al(s) of the drain, distance to mainlines,
the nature of the blockage, presence of
drain cleaning chemicals or other chemi-
cals, etc.
If chemicals are present in the drain, it
is important to understand the specific
safety measures required to work around
those chemicals. Contact the chemical
manufacturer for required information.
Confirm no other utilities are present in
the drain or area to reduce the risk of
damage. Visual inspection of the drain
with a camera is a good practice.
If needed, remove fixture (water closet,
etc.) to allow access to drain. Do not run
the chain knocker in a fixture. This could
damage the FlexShaft Machine or the
fixture.
Best drain cleaning results will occur if
water is flowing during the drain cleaning
process to wash away debris. For 11/4"
and 11/2" sink drains, cut away wall pipes
are available to allow this. See Figure 3
for installation. Place a container to catch
any drain contents that may spill.
Figure 3 – Wall Pipe Installation (Available
accessory)
3. Determine the correct equipment for the
application. See Specifications. Drain
Cleaning Machines for other applications
can be found by consulting the Ridge Tool
Catalog, online at RIDGID.com.
4. Make sure all equipment has been prop-
erly inspected.
5. If needed, place protective covers in the
Figure 2 – Warning Label
3. Clean any debris from the cable assembly
and chain knockers. Inspect sheath for
wear and damage. There should not be
any cuts, kinks, breaks or excessive wear.
Inspect the cable near the chain knocker.
Cable assemblies should not be bent
or deformed. Cable strands should be
tight to one another without separation.
Inspect chain knocker for damage and
wear of the chain itself. If chain links are
worn more than ¼ through or damaged,
replace the chain knocker. Replace worn
and damaged equipment before using
drain cleaning machine.
Confirm that the chain knocker is properly
set up and is secure on the cable.
4. Inspect the battery powered drill per its
instructions. Make sure that the drill is in
good operating condition and the switch
controls the drill operation. Confirm that
the drill meets the requirements in the
Specifications section and is properly set
for use with the machine.
5. Inspect and maintain any other equip-
ment being used per its instructions to
make sure it is functioning properly.
Machine and Work Area
Set-up
WARNING
Set up the Drain Cleaning Machine and
work area according to these proce-
dures to reduce the risk of injury from
electric shock, fire, machine tipping,
twisted or broken cables, chemical
burns, infections and other causes, and
prevent machine damage.
Always wear safety glasses and other
appropriate protective equipment when
setting up your Drain Cleaning Machine.
1. Check for an appropriate work area.
Operate in a clear level, stable, dry lo-
1800-2500
/min
K9-12 FlexShaft™ Drain Cleaning Machine
999-995-413.10_REV. E 7
damage the cable or injure the operator.
Extending the drain back to the Drain
Cleaning Machine also makes it easier to
feed cable assembly into drain.
9. Rotate the cable cap to move the arrow
to unlock position and remove the cap
(Figure 6). Retrieve chain knocker and
cable assembly from the drum. Feed the
chain knocker through the cable cap hole
and lock the cable cap in original position.
(Figure 7).
Figure 6 – Unlock the Cap
Figure 7A –
Remove Cap
Figure 7B –
Retrieve Chain Knocker/Cable
work area. The drain cleaning process
can be messy.
6. Place the Drain Cleaning Machine on the
ground in the horizontal use position, see
Figure 4. Machine should sit squarely and
firmly on the ground. Do not operate with
the machine in the vertical position. This
will reduce the risk of tipping.
7. Remove the battery from the drill. Properly
set-up the drill. (See Battery Powered
Drill Set-up and Operation section.) Se-
curely attach the drill chuck to the hex of
the input shaft (Figure 4).
Figure 4 – Attaching Drill To Input Shaft
Figure 5 – Example of Extending Drain Access
to within 3’ of Machine Cable Outlet
8. Position the Drain Cleaning Machine so
that the cable outlet is within 3' (1 m) of
the drain access. Greater distances from
the drain access increases the risk of the
cable assembly twisting or kinking. If the
FlexShaft Machine cannot be placed with
the cable outlet within 3' (1 m) of the drain
access, extend the drain access with sim-
ilar sized pipe and fittings (see Figure 5).
Improper cable assembly support can
allow the cable to kink and twist and can
Rotation
Arrow
Input
Shaft
Cap Unlock
Position Cap Lock
Position
Cap
Drain
Extension
K9-12 FlexShaft™ Drain Cleaning Machine
999-995-413.10_REV. E
8
the drill before making any adjustments or
attaching to/removing from the drain cleaning
machine.
Drill Switch
The drill must be equipped with a momen-
tary contact switch without a switch lock. This
means that the drill will only turn when the
operator is depressing the drill switch. If the
drill switch is released, the drill will turn OFF.
Set drill rotation to match the arrow on the
machine (see Figure 4).
Drill Speed
When using your FlexShaft Drain Cleaning
Machine, the required rotational speed range
is 1800 – 2500 rpm. Cleaning will be optimized
by rotating the chain knockers closer to the
2500 rpm maximum. To do this, know your bat-
tery powered drill specifications and settings to
optimize operation. Many battery powered drills
have multiple speed settings, and typically the
highest speed is in the range for operation
of the FlexShaft equipment. Do not operate
the FlexShaft drain cleaning machine at over
2500 rpm.
Figure 8 – Example Drill Settings
Drill Adjustable Clutch Setting
Always use a battery powered drill equipped
with a properly set adjustable clutch. The drill
should be used only in the “screw driving
mode” ( ) for the drill adjustable clutch to
work. When the drill adjustable clutch releases,
the motor continues to turn but the drill chuck
Figure 7C – Feed Cable Through Cap Hole
Figure 7 –
Retrieving Chain Knocker From
Drum
10. Pull approximately 4' (1.2 m) of cable as-
sembly out of the machine.
11. Mark the sheath to indicate when the
chain knocker is approaching the drain
opening when withdrawn. This can be
done with tape. This reduces the risk of
the chain knockers coming out of the
drain and whipping around. The distance
depends on the configuration of the drain,
but should be at least 4' (1.2 m) from the
chain knocker.
12. Ensure chain knocker is properly installed
(see Installing/Adjusting Chain Knocker).
13. Insert chain knocker end at least 1' (0.3
m) into drain.
14. Evaluate the work area and determine if
any barriers are needed to keep bystand-
ers away from the drain cleaning machine
and work area. The drain cleaning pro-
cess can be messy, and bystanders can
distract the operator.
15. Position the machine for easy accessibil-
ity. You must be able to hold and control
the cable assembly and the drill switch.
16. With dry hands, insert the battery into the
drill.
Battery Powered Drill
Set-Up and Operation
See the Specifications section along with this
section for information on acceptable battery
powered drills for use with the FlexShaft Drain
Cleaning Machines. There are many types of
battery powered drills available, and not all are
appropriate for use with the FlexShaft Drain
Cleaning Machines. If there is any question
about appropriateness of a drill for this appli-
cation, do not use it. Remove the battery from
Drill Speed Settings Torque Adjustment Collar
K9-12 FlexShaft™ Drain Cleaning Machine
999-995-413.10_REV. E 9
Chain knockers with carbide cutting tips
are used for removing scale from the in-
side of the pipe and can be used for scale
and roots. Carbide cutting tips are used
for aggressive cleaning and could dam-
age pipe, especially softer materials (such
as plastics and Orangeburg), thin walled
pipe, or if the chain knocker is kept in one
position for an extended time. See Figure
10, Attachment Selection Charts.
Figure 9 – Chain Knockers
does not. Many times this is accompanied
by vibration/noise from the drill. When using
the K9-12 FlexShaft Drain Cleaning Machine,
always start with the drill adjustable clutch
set to approximately 25% of the total clutch
adjustment range (example – if the torque
adjustment collar on the drill is marked from 1
to 20, the initial setting should be 5).
Battery powered drills are often also equipped
with “Drill” ( ) and “Hammer” ( ) modes
of operation (Figure 8). In these modes, the
adjustable clutch does not work, and these
modes should never be used for FlexShaft
Drain Cleaning Machine operation.
Operate the drain cleaner per these instruc-
tions with the chain knocker in a drain. The
K9-12 FlexShaft machine integral clutch
should release first before the drill clutch
releases. If during operation the drill clutch
continuously releases (“clutches out”), before
the integral K9-12 FlexShaft Drain Cleaning
Machine clutch, then the drill clutch must be
adjusted. Release the drill switch and remove
the drill from machine. The drill adjustable
clutch setting should be increased. The drill
clutch can be increased in steps until the drill
runs smoothly and no longer releases before
the K9-12 FlexShaft machine integral clutch.
If the integral FlexShaft machine clutch contin-
uously releases, withdraw the cable from the
drain. Review the drain cleaner set up and op-
eration and confirm everything is correct – an
important part of the set up for proper opera-
tion is chain knocker selection and adjustment
(See Figures 10 & 11). Make any needed
changes and continue cleaning drain. If the
integral K9-12 Machine Clutch continues to
disengage during use, consider using another
RIDGID drain cleaning machine.
Installing/Adjusting Chain
Knocker
1. Select proper chain knocker for the con-
ditions.
Chain knockers are sized based on collar
inside diameter and are designed for spe-
cific cable sizes. ¼" chain knockers are
used on ¼" cable, etc. Do not use a larger
size chain knocker on a smaller cable (for
instance 5/16" on ¼"). See Figure 9 and
Collar Distance Chart.
Chain knockers without carbide cutting
tips can be used in common pipe types.
These chain knockers work well in
grease and similar blockages.
1 Chain
2 Chain
K9-12 FlexShaft™ Drain Cleaning Machine
999-995-413.10_REV. E
10
DESCRIPTION
K9-102
1.5" K9-102
2" K9-102
1.5" CARBIDE K9-102
2" CARBIDE
K9-102
1.5"
PENETRATING
HEAD
K9-102
2”
PENETRATING
HEAD
CATALOG NO. 64293 64298 64283 64288 66568 66573
PIPE SIZE
1.25"-1.5"
(32 - 40 mm) 2"
(50 mm) 1.25"-1.5"
(32 - 40 mm) 2"
(50 mm) 1.25"-1.5"
(32 - 40 mm) 2"
(50 mm)
COPPER
GALVANIZED
CAST IRON
PVC
ABS
ORANGEBURG
CORRUGATED
CLAY
GREASE
SOFT
BLOCKAGE
SCALING
LIGHT ROOTS
WIPES
INCLUDED
WITH KIT
BLOCKAGE PIPE TYPE
Chain Knockers Carbide Tipped
Chain Knockers
Figure 10A – Attachment Selection Charts
Penetrating Head
Chain Knockers
All ¼" cable FlexShaft accessories (K9-102) are compatible with the K9-12 FlexShaft Drain Cleaning Machine
K9-12 FlexShaft™ Drain Cleaning Machine
999-995-413.10_REV. E 11
DESCRIPTION
K9-102
NYLON 1.5" K9-102
NYLON 2" K9-102
BALL HEAD K9-102
DROP HEAD
CATALOG NO. 68933
68938 71838 71843
PIPE SIZE 1.5"
(40 mm) 2"
(50 mm) 1.5"
(40 mm) 2"
(50 mm)
COPPER
GALVANIZED
CAST IRON
PVC
ABS
ORANGEBURG
CORRUGATED
CLAY
SPRAY
RELINING
FRAGILE
PIPES/GENTLE
CLEANING
FINAL
CLEANUP
PENETRATES
BLOCKAGES
SMALL LINE
NAVIGATION
DOWN STACK
NAVIGATION
SECURING
RING 68923 68923
APPLICATIONS PIPE TYPE
Nylon Brush Ball/Drop Head
Figure 10B – Attachment Selection Charts
All ¼" cable FlexShaft accessories (K9-102) are compatible
with the K9-12 FlexShaft Drain Cleaning Machine
2. Figure 11 shows a schematic of proper
chain knocker installation and adjustment.
There are two key points when installing/
adjusting chain knockers.
Collar Distance: Set the chain knocker
collars the correct distance apart (“Collar
Distance”) to allow the chains to spread
an appropriate amount when rotated to
clean the pipe walls. Collar Distance var-
ies based on cable size and pipe diam-
eter, and is generally set using a spacer
made from sheath (“Collar Spacer”). If
additional flexibility is required to navigate
a bend, the collar spacer can be removed
and the collar distance can be set with a
tape measure. Operating without a collar
spacer makes it more likely for the cable
to flip over in use and be damaged. Do
not operate carbide cutters without a
collar spacer to reduce risk of cable
damage.
Exposed Cable: Minimize the amount
of exposed cable (cable not covered by
sheath). The more exposed cable there
is, the more likely the cable will flip over
in use and be damaged. Exposed cable
should be limited to no more than ¼" (6
mm), and is set with a bushing made from
sheath (“Knocker Bushing”). Exposed
cable varies with the amount of cable
out of the drum. The more cable out of
the drum, the smaller the exposed cable.
Exposed cable may need to be set with
cable out of the drum for best results,
Sheath is supplied with the drain cleaner
and is available as a service part to allow
configuration as needed for your specific
application. Only use RIDGID FlexShaft
Drain Cleaner sheath of the correct size
for the cable. Any time sheath is cut, it
should be cut cleanly and squarely. Do
not damage the cable when cutting the
sheath.
3. Chain knockers are retained to the cable
with set screws that use a supplied 3 mm
hex key. Loosen set screws and remove
chain knocker, spacer and bushing from
cable.
4. Inspect the sheath end for damage or
wear. The sheath end should be square
and clean. If needed, the sheath end can
be trimmed slightly.
5. If needed, cut a section of sheath to use
as the collar spacer to the appropriate
size (See Collar Distance Chart).
K9-12 FlexShaft™ Drain Cleaning Machine
999-995-413.10_REV. E
12
Installing Brushes
Brushes are available for various uses, such
as cleaning the inside of the pipe, centering
the chain knocker in the pipe and spreading
lining compound. See the specific brush infor-
mation for the types of uses it is appropriate
(See Figure 10B).
Brushes can be assembled in a variety of
configurations, with some options shown in
Figure 12.
Figure 12A – Two Spaced Brushes With A
Chain Knocker In Between
Figure 12B – Two Spaced Brushes
Installation of brushes is similar to the in-
stallation of chain knockers. The collar of the
brush is placed over the cable and retained
by securely tightening the set screws. When
Collar distance can be modified to your
preference for the specific pipe/applica-
tion. As collar distance increases, the di-
ameter of the chains decreases, and vice
versa. Improperly set collar distance can
reduce the efficiency of pipe cleaning.
6. Test fit the chain knocker, knocker bushing
and collar spacer on the cable as shown in
Figure 11. Chains should be straight – do
not assemble with chains twisted. To pre-
vent excessive cable end wear, cable end
should be flush with the end of the collar.
Check length of exposed cable. To reduce
the risk of cable flip over and damage,
exposed cable cannot exceed ¼" (6 mm).
If needed, cut a knocker bushing from
sheath to limit exposed cable. Always use
a knocker bushing to reduce wear on
the sheath end.
7. With the chain knocker correctly installed
on the cable as shown in Figure 11, use
the supplied hex wrench to securely
tighten the collar set screws. Place set
screw tip against cable, then tighten an
additional 1/8 to 1/4 turn (45° to 90° de-
grees). If the set screws are not secure,
the chain knocker could slip and damage
the cable or be lost down the drain.
Cable Number Number of Nominal Recommended Collar
Size of Chains Links/Chain Pipe Size Distance
1/4" 1 7 11/4" to 11/2" (32 mm to 40 mm) 13/4" (44.5 mm)
2 7 11/2" to 2" (40 mm to 50 mm) 13/4" (44.5 mm)
Collar Distance Chart
Knocker
Figure 11 – Chain Knocker Installation/Adjustment
Sheath End
Collar Spacer
Cable
Set Screw
(3 mm Hex)
Sheath
Collar Distance
Knocker Collar
Knocker Chain
Cable End
Flush To
Collar
Carbide Cutting Tip
(If Equipped)
Knocker Bushing Knocker Collar
Set Screw
(3 mm Hex)
Exposed Cable
.25" (6 mm)
Maximum
K9-12 FlexShaft™ Drain Cleaning Machine
999-995-413.10_REV. E 13
at the end of the cable, the cable end is flush
with the brush collar. Brush securing rings
are available to improve brush retention if set
screws loosen in use.
As with chain knockers, minimize the amount
of exposed cable (cable not covered by
sheath). The more exposed cable there is, the
more likely the cable will flip over in use and
be damaged. Limit exposed cable to no more
than ¼" (6 mm), set with a bushing made from
sheath (“Knocker Bushing”).
Installing Penetrating Head
Penetrating heads are available to help create
a hole in a blockage to get the drain flowing
and allow the chain knocker into an area.
See Figure 13 for installation information.
Figure 13 – Penetrating Head Installation
Operating Instructions
WARNING
Always use safety glasses and gloves in good
condition while handling or using. Use latex or
rubber gloves, face shields, protective clothing,
respirators or other appropriate protective equip-
ment when chemicals, bacteria or other toxic or
infectious substances are suspected to be present
to reduce the risk of infections, burns or other
serious personal injury.
Do not use with a corded drill. Operating with a
corded drill increases the risk of electrical shock.
Do not allow the chain knocker/end of cable
to stop turning while drill switch is depressed.
This can overstress the cable and may cause
twisting, kinking or breaking of the cable assembly
and may result in serious personal injury.
Practice good hygiene. Do not eat or smoke
while handling or operating the tool. After han-
dling or operating drain cleaning equipment,
use hot, soapy water to wash hands and other
body parts exposed to drain contents. This
will help reduce the risk of health hazards due to
exposure to toxic or infectious material.
Keep hand on the cable assembly whenever
the FlexShaft Machine is running. This provides
better control of the cable and helps prevent twist-
ing, kinking and breaking of the cable and reduces
the risk of injury.
Position the FlexShaft Machine cable outlet
within 3' (1 m) of the drain inlet or properly sup-
port exposed cable assembly when the dis-
tance exceeds 3' (1 m). Greater distances can
cause control problems leading to twisting, kinking
or breaking of the cable. Twisting, kinking or break-
ing cable may cause striking or crushing injuries.
One person must control both the cable as-
sembly and cordless drill. Do not lock drill switch
in the ON position during operation. If the cable
stops rotating, the operator must be able to re-
lease the drill switch to prevent twisting, kinking
and breaking of the cable and reduce the risk
of injury.
Follow operating instructions to reduce the
risk of injury from twisted or broken cable,
cable ends whipping around, machine tipping,
chemical burns, infections and other causes.
1. Make sure that machine and work area is
properly set-up and that the work area is
free of bystanders and other distractions.
2. Pull cable assembly from the machine and
feed into drain. At least 1' (0.3 m) of cable
must be in drain so that the chain knocker
will not come out of the drain and whip
around when the machine is started.
Directly route the cable assembly from the
machine cable outlet to the drain opening,
minimizing exposed cable and changes
in direction. Do not tightly bend the cable
assembly – this can increase the risk of
twisting or breaking.
If using a camera to view the drain clean-
ing process, the camera can be fed in
at the same time. Typically the cable as-
sembly and the camera push rod can be
gripped and advanced/retrieved at the
same time. Keep the camera at least 1.5’
(0.5 m) behind the chain knocker.
Do not allow the spinning chain
knocker to hit the camera head/push rod.
It can damage it.
3. Assume a proper operating position to
help maintain control of the cable assem-
bly and drill (see Figure 14):
Collar
Securely Tighten
Set Screws
1/4" (6mm) MAX.
Fully Insert
NOTICE
K9-12 FlexShaft™ Drain Cleaning Machine
999-995-413.10_REV. E
14
knocker into the blockage when withdraw-
ing the cable. It’s important to let the
speed of the chain knocker clean the
drain – do not force chain knockers
into blockages.
8. Advancing/Retrieving the Cable
Assembly – FlexShaft Lubricant
In some cases it may be beneficial to
apply RIDGID FlexShaft lubricant to the
outside of the sheath when feeding the
cable down the drain. This can make it
easier to advance the cable assembly
down the drain and allow greater clean-
ing distance. If doing so, place a clean
towel with lubricant on it in the palm of the
gloved hand used for advancing the cable
assembly, and apply lubricant as feeding
the cable assembly (Figure 15). Add lu-
bricant to the towel as needed during the
process.
Only use RIDGID FlexShaft lubricant.
Other lubricants may not be appropriate
for use in a drain and could contaminate
the water.
When retrieving the cable assembly, it is
good practice to use a towel to wipe dirt
and debris from the cable sheath as it is
pulled from the drain and fed back into the
drum.
Figure 15 – Applying Lubricant to the Cable
Sheath
9. Rotating the Chain Knocker
Generally the chain knocker is rotated for
cleaning while withdrawing the cable.
• Be sure you can quickly release the drill
switch.
• Your gloved hand must be on the cable
assembly to control and support as the
cable assembly is fed into the drain and
blockage.
• Be sure that you have good balance, do
not have to overreach, and cannot fall
on machine, drain, etc..
This operating position will help to main-
tain control of the cable assembly and
FlexShaft Machine.
Figure 14 – In Operating Position
4. Confirm that at least 1' (0.3 m) of cable
assembly is in the drain.
5. Confirm that the drill directional switch
is in the forward direction, and depress
and release the drill switch, noting the
direction of the drill chuck. Drill rotation
should match the arrow on the drum (See
Figure 4). Do not rotate the cable in re-
verse except as specifically described in
these instructions. Running in reverse can
damage the FlexShaft cable.
6. Place one hand on the cable assembly
and other hand on the drill grip.
7
. The FlexShaft Drain Cleaning Machine uti-
lizes high rotational speed and low torque
to clean drains. FlexShaft cable assem-
blies are more flexible than other types
of drain cleaning cables. The FlexShaft
machine is best used by applying light
pressure and slowly working the chain
3' (1 m) MAX.
K9-12 FlexShaft™ Drain Cleaning Machine
999-995-413.10_REV. E 15
Only rotate the cable/chain knocker when
the chain knocker is at least 1’ in the drain.
To rotate the cable, firmly grip the drill han-
dle and depress the drill switch. The per-
son controlling the cable assembly must
also control the drill switch. Do not operate
the machine with one person controlling
the cable assembly and another person
controlling the drill. Do not allow cable
assembly to build up outside the drain,
bow or curve. This can lead to twisting,
kinking and breaking of the cable. At any
time, release the drill trigger to stop cable
rotation. When clearing blockages, operate
the cable at full speed for best cleaning.
Do not force the chain knocker into
blockages. In some cases, using variable
speed will assist with navigating turns.
Rotating the chain knocker in FORWARD
or REVERSE for a short time while ad-
vancing the cable assembly can help it
negotiate the drain and blockages.
10. Advance the cable assembly into the drain,
generally not rotating. Grasp the sheath
near where it exits the machine housing.
Pull 6" to 12" (150 to 300 mm) of cable
assembly out of the FlexShaft Machine
so that there is a slight bow in the cable.
Gloved hand must be on cable assembly
to control and support. Improper cable
support can allow the cable assembly to
kink or twist and can damage the cable or
injure the operator. Feed the cable assem-
bly into the drain (Figure 16, Step 1).
11. Continue to advance the cable assem-
bly until the resistance is encountered.
Carefully work the chain knocker through
the blockage. Do not force the cable
assembly – if the chain knocker cannot
turn, it cannot clean the drain. Pay at-
tention to how far the cable has gone. Do
not overrun the cable into a larger drain.
This can cause the cable to knot up or
cause other damage (Figure 16, Step 2).
12. If possible, start a flow of water down the
drain to flush the debris out of the line
and help clean the cable assembly as it is
retrieved. This can be done by turning on a
faucet in the system or other methods. Pay
attention to the water level, as the drain
could plug again (Figure 16, Step 3).
13. With the chain knocker past the blockage/
area to be cleaned, fully depress the drill
switch to rotate the chain knocker. Slowly
pull the cable assembly from the drain, al-
lowing the rotating chain knocker to clean
the drain walls and break up the blockage
The general operating steps for the FlexShaft Drain Cleaning Machines (see below):
1
3
2
4
5
6
1. Advance the chain knocker (generally not
rotating) to the area of the drain that needs
cleaned.
2.
If there is a blockage, pass the chain
knocker through the blockage.
3. If possible, start a flow of water through the
drain to carry cuttings and debris away as
the drain is cleaned.
4. Rotate the cable/chain knocker at full speed.
5. Continue to rotate knocker. Gradually with-
draw the cable assembly so that the chain
knocker can break up the blockage.
6. Continue to gradually withdraw the cable
assembly while rotating so that the chain
knocker can clean the walls of the drain.
Figure 16 – General Operating Steps with Chain Knocker
K9-12 FlexShaft™ Drain Cleaning Machine
999-995-413.10_REV. E
16
(Figure 16, Steps 4 & 5). If the cable
stops turning, do not continue operat-
ing the drill. This may cause the cable to
twist and kink. At any time, release the drill
switch to stop cable rotation.
Monitor the feedback from the feel of the
cable assembly in your hand and the
sound of the drill/knocker in the drain. If
the integral FlexShaft machine clutch or
the drill clutch disengages (indicated by
noise from the integral clutch or drill and
possibly some vibration of the drill), the
cable has likely stopped turning. See Drill
Adjustable Clutch Setting in the Battery
Powered Drill Set-up and Operation sec-
tion. When this happens, release the drill
switch to stop the rotation of the drill. Once
drill rotation is stopped the clutch will auto-
matically reengage, however, if the cable
end is stuck, it must be moved out of the
blockage before proceeding.
It may be necessary to move the chain
knocker out of the blockage to allow it to
come back up to speed.
If the chain knocker becomes stuck, it may
be able to be freed by running the drill in re-
verse for a short time. Do not run in reverse
for more than a few seconds to prevent
cable damage. In some cases, it may be
possible to pull the cable assembly and the
blockage out of the drain by hand. If this is
done, be careful to not damage the cable
assembly. Remove the blockage from the
knocker and cable and continue cleaning
the drain as detailed above.
If using with a camera, do not run the
chain knocker into the camera head or
push rod.
In some cases, to clean the opposite side
of the pipe it may help to run the drill in
REVERSE for a short time.
14. Continue to clean the rest of the drain
while retrieving the cable. Once the drain
has been cleaned, retrieve the cable and
feed back onto the drain cleaning machine.
Pay close attention, as the cable may
lodge in a blockage while being retracted
(Figure 16, Step 6).
15. Watch for your sheath marking as the
cable assembly is retrieved; listen care-
fully to the sound of the knocker as it
approaches the pipe entrance. Release
the drill switch when the chain knocker
nears drain opening. Do not pull the chain
knocker from drain while it is rotating. The
chain knocker can whip around and can
cause damage or serious injury.
16. If needed for complete cleaning, repeat
the above procedure.
17. Pull any remaining cable assembly from
the line by hand and push back into the
drum. Prepare the machine for transport.
Using Machine With Brushes
Using the machine with a brush is similar to
use with a chain knocker. Brushes are used
for finer cleaning of the pipe; they are not
used for blockage removal. Remove block-
ages and heavy debris with a chain knocker
or other methods first. While chain knockers
are most typically rotated while withdrawing
the cable from the drain, brushes are typi-
cally used while advancing the cable. This
is because the brushes typically fill the drain
diameter and push debris in front of them.
See Figure 17 for general steps.
Step 1
Step 2
Step 3
Figure 17 –
Cleaning Drain Walls With Brush
1. Advance the brush (generally not rotating)
into the drain.
2. When close to the area of the drain to be
cleaned, if possible, start a flow of water
through the drain to carry debris away
during cleaning.
3. Rotate the cable/brush at full speed and
gradually advance the cable into the drain
to clean the walls as desired.
Brushes can also be used in conjunction with
chain knockers such as centering devices
or for combined cleaning. Usage depends
K9-12 FlexShaft™ Drain Cleaning Machine
999-995-413.10_REV. E 17
on the exact circumstances and is left to the
judgement of the user.
Penetrating tip heads can also be used with
brushes or chain knockers for additional ac-
cessory customization.
Draining the Drum
If the cable is wiped clean as it is pulled from
the drain, there should be minimal need to
drain the drum. If needed, remove the cable
cap and turn the machine over to drain.
Transportation and
Storage
Feed all of cable assembly and
chain knocker into the drum and secure the
cap. Remove the drill from the input shaft. Do
not leave the drill attached during transport
and storage to prevent tipping and damage to
the drain cleaner.
The Drain Cleaning Machine must be kept
dry and indoors or well covered if kept out-
doors. Store the machine in a locked area
that is out of reach of children and people
unfamiliar with drain cleaning machines.
This machine can cause serious injury in the
hands of untrained users.
Maintenance
Instructions
WARNING
Drill should be removed from drain
cleaner before any maintenance is per-
formed.
Always wear safety glasses and other
appropriate protective equipment when
performing any maintenance.
Cleaning
It is good practice to wipe dirt and debris
from the cable assembly as it is pulled from
the drain to help keep the equipment clean. If
needed, cable assembly can be pulled from
the machine and the housing opened for
flushing/ cleaning.
Clean the machine as needed with hot soapy
water and/or mild disinfectants. Drain the ma-
chine as needed.
Lubrication
The FlexShaft Drain Cleaning Machines are
lubricated for life from the factory.
Cable Assembly Replacement
1. Place the Drain Cleaning Machine in
Horizontal use position.
2. Pull entire cable assembly from housing.
3. Using a Philips-head screwdriver, remove
the fasteners holding the housing together.
Remove the top housing (Figure 18)
Figure 18 – Drain Cleaner Top Housing
Removed
Figure 19 –
Replacement Cable Installation
4. Remove retention plate fasteners and
retention plate (Figure 18).
5. Remove the detent pin from the cable
coupling.
6. Remove the cable coupling from the in-
tegral cable clutch shaft and remove the
cable assembly.
7
. Reverse process to assemble. Fully insert
the cable into the cable channel. There
should be no more than 0.25" (6 mm)
between the end of the sheath and the
coupler (See Figure 19).
8. Securely attach all fasteners. Do not over-
tighten.
WARNING
Cable
Clutch
Retention
Plate
Cable
Channel
Cable
Coupling
Detent
Pin
0.25" MAX.
K9-12 FlexShaft™ Drain Cleaning Machine
999-995-413.10_REV. E
18
For a complete listing of RIDGID equipment
avail
able for these tools, see the Ridge Tool
Cata log online at RIDGID.com or see Contact
Information.
Disposal
Parts of these tools contain valuable materi-
als and can be recycled. There are compa-
nies that specialize in recycling that may be
found locally. Dispose of the components in
compliance with all applicable regulations.
Contact your local waste management au-
thority for more information.
Service and Repair
WARNING
Improper service or repair can make
the machine unsafe to operate.
The “Maintenance Instructions” will take care
of most of the service needs of this machine.
Any problems not addressed by this section
should only be handled by a RIDGID Autho-
rized Independent Service Center. Use only
RIDGID service parts.
For information on your nearest RIDGID Au-
thorized In depen dent Service Center or
any service or repair questions see Contact
Information section in this manual.
Optional Equipment
WARNING
To reduce the risk of serious injury, only
use accessories specifically designed
and recommended for use with the
RIDGID K9-12 FlexShaft Drain Cleaning
Machine, such as those listed.
SYMPTOM POSSIBLE REASON SOLUTION
Cable kinking or
breaking.
FlexShaft Machine
wobbles or moves
while cleaning drain.
Troubleshooting
Cable assembly is being forced.
Incorrect FlexShaft Machine or chain
knocker used for pipe diameter.
Drill being run in reverse.
Cable assembly exposed to acid/
corroded.
Cable/sheath worn out.
Cable assembly not properly
supported.
Chain knocker not properly set up/
adjusted.
Improper drill.
Ground not level.
Do no force cable assembly. Follow op-
erating instructions.
Use correct FlexShaft Machine or chain
knocker for pipe size.
Use reverse only if flex shaft gets
caught in pipe.
Clean cable assembly routinely.
Replace worn cable assembly.
Support cable assembly properly, see
instructions.
Properly set up/adjust chain knocker,
see instructions.
Choose proper drill, see instructions.
Place on level stable surface.
Catalog
No. Description
64283 Knocker, 1/4" cable, 11/4"-11/2" pipe, single
chain, carbide tip
64293 Knocker, 1/4" cable, 11/4"-11/2" pipe, single chain
64288 Knocker, 1/4" cable, 2" pipe, 2 chain, carbide tip
64298 Knocker,
1/4" cable, 2" pipe, 2 chain
64338 FlexShaft Lubricant, 8 oz, 12 per case
64363 11/4" RIDGID Wallpipe Accessory
64368 11/2" RIDGID Wallpipe Accessory
71838 Penetrating Ball Head 11/4"- 2"
71843 Penetrating Drop Head 11/4"- 2"
68933 1.5" (40mm) Nylon Brush for 1/4" (6mm) cable
68938 2" (50mm) Nylon Brush for 1/4" (6mm) cable
66568 FlexShaft Chain Knocker, 1/4" cable, 11/4" - 11/2"
pipe, single chain, carbide tipped w/penetrat-
ing head
66573 FlexShaft Chain Knocker, 1/4" cable, 2" pipe, 2
chain, carbide tipped w/penetrating head
76183 FlexShaft Cable Assembly, 1/4" x 30'
64643 FlexShaft
1/4" Sheath Stock, 12"
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