Greenlee 6800-22 6802-22 6805-22 Ultra Tugger ADB Manuel utilisateur

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Serial Code ADB

INSTRUCTION MANUAL

Read and understand all of the instructions and

safety information in this manual before operating

or servicing this tool.

Español ............... 43

Français .............. 85

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070

2

Table of Contents

Description .................................................................... 3

Purpose ......................................................................... 3

Important Safety Information ..................................... 4-7

Grounding Instructions .................................................. 8

Identication ............................................................. 9-10

Specications .............................................................. 11

Cable Pulling Glossary ................................................ 12

Cable Pulling Principles:

Cable Pulling Systems ............................................. 13

Pulling Theory .......................................................... 14

Cable Pulling Forces:

At the Cable Puller Anchoring System ................. 15

At the Capstan ..................................................... 16

At the Pulling Rope .............................................. 17

At the Connectors ................................................ 18

At the Sheaves ..................................................... 19

Calculating Hook Load:

One Attachment Point .......................................... 20

Two Attachment Points ........................................ 21

Hook Load ............................................................ 22

Hook Loads Illustrated ......................................... 23

Tailing the Rope:

Control of the Pull ................................................ 24

Amount of Tailing Force ....................................... 24

Number of Wraps of Rope around Capstan ........ 24

Preventing Rope Overlap ..................................... 24

Summary of Cable Pulling Principles....................... 25

Planning the Pull .......................................................... 25

Typical Setups:

Pipe Adapter ............................................................ 26

Chain Mount ............................................................ 26

Floor Mount ............................................................. 26

T-Stand .................................................................... 27

Wheeled Carriage .................................................... 28

Setup:

Pipe Adapter ....................................................... 29-31

T-Stand .................................................................... 32

Wheeled Carriage .................................................... 33

Mounting Components:

Boom with Nose Unit ........................................... 34

Booms with Elbow Unit and Nose Unit ................ 35

Slip-in Coupler ..................................................... 36

Straddling the Conduit with Slip-in Coupler ........ 36

Chain Mount ....................................................... 37-38

Floor Mount ............................................................. 39

Operation ..................................................................... 40

Removing Cable .......................................................... 41

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070

3

KEEP THIS MANUAL

Description

The Greenlee Ultra Tugger

®

cable puller is intended

to be used to pull cable through conduit and in tray.

The Ultra Tugger will develop 35.6 kN (8000 lb) of pulling

force. See a Greenlee catalog for sheaves, pulling rope,

and other cable pulling acces–sories to create an entire

cable pulling system.

No single manual can provide instructions for every

possible cable pulling application; this manual contains

general information necessary to accomplish cable pulls

of many different setups.

Safety

Safety is essential in the use and maintenance of

Greenlee tools and equipment. This instruction manual

and any markings on the tools provide information for

avoiding hazards and unsafe practices related to use of

this tool. Observe all of the safety information provided.

Do not operate this tool unless fully trained to do so,

or under trained supervision.

Purpose of this Manual

This manual is intended to familiarize all personnel with

the safe operation and maintenance procedures for the

Greenlee 6800-22 Ultra Tugger cable pullers.

Keep this manual available to all personnel.

Replacement manuals are available upon request at no

charge at www.greenlee.com.

Other Publications

Service Manual: 99966174

All specications are nominal and may change as design

improvements occur. Greenlee Textron Inc. shall not be liable for

damages resulting from misapplication or misuse of its products.

Ultra Tugger is a registered trademark of Textron Innovations Inc.

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070

4

IMPORTANT SAFETY INFORMATION

SAFETY

ALERT

SYMBOL

This symbol is used to call your attention to hazards

or unsafe practices which could result in an injury or

property damage. The signal word, dened below,

indicates the severity of the hazard. The message

after the signal word provides information for pre-

venting or avoiding the hazard.

Immediate hazards which, if not avoided, WILL result

in severe injury or death.

Hazards which, if not avoided, COULD result in

severe injury or death.

Hazards or unsafe practices which, if not avoided,

MAY result in injury or property damage.

Read and understand all of the

instructions and safety information

in this manual before operating or

servicing this tool.

Failure to observe this warning will

result in severe injury or death.

Do not operate the cable puller in

a hazardous environment. Hazards

include ammable liquids and gases.

Failure to observe this warning will

result in severe injury or death.

Electric shock hazard:

Disconnect the cable puller from the

power supply before servicing.

Failure to observe this warning can

result in severe injury or death.

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070

5

IMPORTANT SAFETY INFORMATION

Inspect and verify the maximum

load-bearing capacity or maximum

strength of all structural supports,

pulling system components and

anchoring systems before setting

up the puller. Any component that

cannot withstand the maximum

cable-pulling forces may break and

strike nearby personnel with sufcient

force to cause severe injury

or death.

Do not allow anything other than the

pulling rope to contact the capstan.

A grip, swivel, or other component

could break and strike operator with

great force.

Failure to observe this warning can

result in severe injury or death.

Do not stand directly under a vertical

pull. Cable could fall suddenly from

the conduit.

Failure to observe this warning can

result in severe injury or death.

Locate the puller so that it is close to the conduit.

Rope, cable, or connectors can break under tension,

causing the rope to whip violently.

Failure to observe this warning can result in severe

injury or death.

An under-rated or worn rope may break and whip

violently. Use a double-braided composite rope with

the following characteristics:

• Maximum Rated Capacity:

at least 35.6 kN (8000 lb)

• Average Breaking Strength:

at least 143 kN (32,000 lb)

Failure to observe this warning can result in severe

injury or death.

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070

6

IMPORTANT SAFETY INFORMATION

• Check the condition of the entire rope before use.

A worn or damaged rope can break under tension

and whip violently.

• Do not maintain a stationary rope on a rotating

capstan. The wear generated may cause the rope

to break under tension and whip violently.

Failure to observe these warnings can result in severe

injury or death.

Attach the pulling rope to the cable with appropriate

types of connectors as described in this manual.

Select connectors with a maximum-rated capacity

of 35.6 kN (8000 lb). An under-rated connector can

break under tension.

Failure to observe this warning can result in severe

injury or death.

Shear Point:

Do not put ngers through holes in

elbow unit. Rotating parts may cut off

ngers.

Failure to observe this warning can

result in severe injury or death.

Keep hands away from the capstan.

Rope at the capstan can crush a

hand.

Failure to observe this warning can

result in severe injury or death.

Do not wrap rope around hands,

arms, waist or other body parts.

Do not stand in spent coils or tailed

rope. Hold rope so that it may be

released quickly.

Rope, cable, or a connecting device can break under

tension, causing the rope to whip violently.

Do not allow any unnecessary personnel to remain in

the area during the pull.

• Do not allow any personnel to stand in line with the

pulling rope.

Failure to observe these warnings can result in severe

injury or death.

Do not allow the rope to become overlapped on the

capstan. If an overlap begins to develop, relax the

tailing force immediately and shut off the cable puller.

Failure to observe this warning can result in severe

injury or death.

Use this tool for manufacturer’s intended purpose

only. Do not use the cable puller as a hoist or winch.

• The cable puller cannot lower a load.

• The load may fall.

Failure to observe this warning can result in severe

injury or death.

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070

7

IMPORTANT SAFETY INFORMATION

Inspect puller and accessories before use. Replace

any worn or damaged components with Greenlee

replacement parts. A damaged or improperly assem-

bled item can break and strike nearby personnel with

sufcient force to cause severe injury or death.

Entanglement hazard:

• Do not operate the cable puller while wearing

loose-tting clothing.

• Retain long hair.

Failure to observe this warning can result in severe

injury or death.

Wear eye protection when using this

tool. Failure to wear eye protection

can result in severe eye injury from

ying debris.

When using the wheeled carriage to transport the

Ultra Tugger:

• Keep personnel out of the path of transport.

• Evaluate the terrain over which the carriage is to

move. If in doubt, obtain additional help and move

the carriage slowly.

• Do not transport over inclines of more than 10°.

• Do not transport the carriage with boom tubes

longer than the supplied 3' and 4' tubes.

10°

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070

8

Grounding Instructions

Electric shock hazard:

Connect this tool to a grounded

receptacle on a 16-amp GFCI-

protected circuit.

Failure to observe these warnings can

result in severe injury or death.

This tool must be grounded. In the event of a malfunc-

tion or breakdown, an electrical ground provides a path

of least resistance for the electric current. This path of

least resistance is intended to reduce the risk of electric

shock to the operator.

This tool’s electric cord has a grounding conductor and

a grounding plug as shown. Connect the plug to recep-

tacle that is properly installed and grounded in accor-

dance with all national and local codes and ordinances.

Do not use an adapter.

16-Amp / 230-Volt Plug and Grounded Receptacle

This tool is equipped with a European-style electrical

plug. The electrical plug can be replaced with a compat-

ible plug for the country in which the tool will be used.

The electrical plug should be replaced by a qualied

electrician. Do not use an adapter.

Plug Receptacle

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070

9

Identiﬁcation

Ultra Tugger Cable Puller

1. Motor (under shroud) 7. Right Angle Sheave

2. Circuit Breaker / I/O Switch 8. Rope Ramp

3. Mounting Plates 9. Hitch Clip

4. Rope Tie-Off 10. Gearbox

5. Adjustable Sheave Bracket 11. Mounting Pin (2)

6. Tapered Steel Capstan 12. Force Gauge with

Remote I/O Switch

1

2

3

4

5

6

7

9

11

Lift Point

10

8

12

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070

10

Identiﬁcation (cont’d)

Versi-Boom Components

1. Elbow Unit 9. Wheeled Carriage

2. Sight Hole 10. Slip-in Coupler

3. 4' Boom Tube 11. Nose Unit

4. Sight Hole 12. Mounting Pins

5. Boom Mount 13. Hitch Pin Clips

6. T-Stand 14. 3' Boom Tube

7. Puller 15. Long Pin

8. Force Gauge

7

1

14

11

13

12

10

2

3

5

9

6

4

15

8

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070

11

Speciﬁcations

Weight ........................................................................................................ 43 kg (95 lb)

Dimensions:

Length ................................................................................................. 29 cm (11.5")

Width ....................................................................................................... 68 cm (27")

Height .....................................................................................................25 cm (9.8")

Motor:

Voltage ..................................................................230 VAC, 50/60 Hz, single phase

Current Draw at Full Load .......................................................................... 9.5 amps

Sound Level ............................................................................................. Lwa 70 at 1 m

Power Source ............................................230 VAC, 50/60 Hz, 16 amps, single phase

Speed:

No Load.................................................................................... 2.74 m/min (9 ft/min)

8900 N (2000 lb) ....................................................................... 2.44 m/min (8 ft/min)

17.8 kN (4000 lb) ................................................................... 2.29 m/min (7.5 ft/min)

26.7 kN (6000 lb) ...................................................................... 2.13 m/min (7 ft/min)

35.6 kN (8000 lb) ...................................................................... 1.83 m/min (6 ft/min)

Pulling Force:

0 kN to 17.8 kN (0 lb to4000 lb) .............................................Continuous operation

17.8 kN to 35.6 kN (4000 lb to 8000 lb) ...................................... 5 minutes per hour

Pulling Rope:

Required Rope ...................................................................22.2 mm (7/8") diameter,

double-braided, polyester composite

Average Breaking Strength .......................................... 143 kN (32,000 lb) minimum

IP Rating:

Motor .................................................................................................................. IP23

Ultra Tugger and Force Gauge Enclosure .......................................................... IP54

Temperature Rating:

Transportation and Storage ................................. 55 °C to -25 °C (131 °F to -13 °F)

Elevation Rating ......................................................... 1000 m (3280 ft) above sea level

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070

12

anchoring system

any item or group of items that keeps a cable pulling

component in place during the cable pull

capstan

the hollow cylinder of the cable puller that acts on the

pulling rope to generate pulling force

coefﬁcient of friction

the ratio that compares two amounts of force:

(1) the force needed to move an object over a surface

and (2) the force holding the object against the surface

This ratio is used to describe how the capstan and the

rope work together.

connector

any item, such as a wire grip, clevis, swivel, or pulling

grip, that connects the rope to the cable

direct line of pull

the areas next to the pulling rope and along its path;

this includes the areas in front of, in back of, and under-

neath the rope

maximum rated capacity

the amount of pulling tension that any component

can safely withstand, rated in kilonewtons (metric)

or pounds; the maximum rated capacity of every

component must meet or exceed the maximum pulling

force of the cable puller

Newton

a metric unit of force, equivalent to 0.225 pounds of

force

pipe adapter sheave

attaches to conduit for pulling or feeding cable

pulling grip

connects the rope to the cable; consists of a wire mesh

basket that slides over the cable and grips the insulation

pulling force

the amount of pulling tension developed by the cable

puller, rated in newtons (metric) or pounds; a cable

puller is usually described by the maximum pulling force

that it can develop

Cable Pulling Glossary

resultant force

any force that is produced when two or more forces act

on an object; applies to the sheaves of a cable pulling

system

rope ramp

a device that works with a tapered capstan; guides the

rope onto the capstan to prevent rope overlap

sheave

a pulley that changes the direction of the rope and cable

stored energy

the energy that accumulates in the pulling rope as it

stretches, described in newton-meters (metric) or

foot-pounds

support structure

any stationary object that a cable pulling system

component is anchored to, such as a concrete oor

(for the oor mount) or an I-beam (for a sheave)

tactile feedback

the way the rope feels as it feeds off of the capstan; the

feel of the rope provides information about the progress

of the pull to the operator

tail

the portion of the rope that the operator applies force

to; this is the rope coming off of the capstan, and is not

under the tension of the pull

tailing the rope

the operator’s main function; this is the process of

applying force to the tail of the pulling rope—see the

complete explanation under Principles of Cable Pulling

wire grip

connects the rope to the cable; some use a set screw to

clamp onto the conductors of the cable

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070

13

Cable Pulling Principles

Pulling cable is a complex process. This section of

the manual describes and explains four main topics of

pulling cable:

• each cable pulling system component

• how these components work together

• forces that are generated

• procedures for the cable puller operator to follow

While reading through this section of the manual, look

for components that are shaded in the illustrations. The

shading indicates components that are associated with

the text.

Greenlee strongly recommends that each member of

the cable pulling crew review this section of the manual

before each cable pull.

Cable Pulling Systems

Pulling cable requires a system of components. At a

minimum, a cable pulling system will include a cable

puller, a cable pulling rope, and connectors to join the

rope to the cable. Most systems will also include, but

are not limited to, a cable puller anchoring system,

pulling sheaves and sheave anchoring systems.

The cable puller has a maximum amount of pulling

force, which is the amount of pulling tension that it

develops. Every other component of the pulling system

has a maximum rated capacity, which is the amount

of pulling tension that it can withstand. The maximum

rated capacity of every component must meet or

exceed the cable puller’s maximum pulling force.

Typical Cable Pulling System

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070

14

Cable Pulling Principles (cont’d)

Cable Pulling Theory Illustrated

Pulling Theory

This section introduces the main ideas involved with

pulling cable.

Pulling Resistance

The cable puller must overcome two types of resistance:

gravity and friction.

Gravity constantly exerts its force on the vertical

portions of the run. When the pulling force is relaxed,

gravity attempts to pull the cable downward. Friction

develops where the cable contacts the sheaves, conduit

and tray. Friction resists any movement, forward or

backward, and tends to hold the cables in place.

To accomplish a cable pull, the cable pulling system

must develop more force than the combination of

gravity and friction.

Generating Pulling Force

To generate pulling force, the capstan works as a

force multiplier. The operator exerts a small amount

of force on the rope. The cable puller multiplies this

and generates the pulling force.

This pulling force is applied to the rope, connectors,

and cable in order to accomplish the pull. The direc-

tion of force is changed, where necessary, with pulling

sheaves.

Gravity

Weight

of Cable

Conduit

Friction

Tailing

Force

Pulling Force

35.6 kN

(8000 lb)

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070

15

Cable Pulling Principles (cont’d)

Pulling Force at the Cable Puller’s Anchoring System

Cable Pulling Forces

This section provides detailed explanations and illustra-

tions of the forces that are generated during the cable

pull. These explanations are based on the concepts

presented in the last section, Pulling Theory.

At the Cable Puller Anchoring System

The cable puller will exert its maximum pulling force on

cable puller’s anchoring system. It is extremely import-

ant the anchoring system can withstand this amount of

force. Refer to “Typical Setup: Floor Mount” for proper

setup or installation.

35.6 kN

(8000 lb)

Maximum

35.6 kN

(8000 lb)

Maximum

Pulling Force

35.6 kN

(8000 lb)

Maximum Pulling Force

at Anchoring System

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070

16

Cable Pulling Principles (cont’d)

Cable Pulling Forces (cont’d)

At the Capstan

The capstan acts as a force multiplier. The operator

exerts a small amount of tension, or tailing force, on the

rope; the capstan multiplies this force to pull the cable.

The resultant force depends upon the number of times

the rope is wrapped around the capstan, as shown in

the formula below.

Pulling Force = Tailing Force x e

0.0175µø

Where: e = the natural logarithm, or 2.7183

µ = the coefcient of friction between the

rope and the capstan*

ø = the number of degrees of wrap of rope

around the capstan

* The average value for the coefcient of friction when

double-braided composite rope is pulled over a clean

dry capstan is 0.125.

The following table is based on the formula above.

The input, or tailing force, is constant at 44.5 N (10 lb).

Increasing the number of wraps increases

the pulling force.

Operator’s

TailingForce

Number of

Wraps of Rope

Approximate

PullingForce

44.5 N (10 lb) 1 93.4 N (21 lb)

44.5 N (10 lb) 2 213.5 N (48 lb)

44.5 N (10 lb) 3 474.9 N (106 lb)

44.5 N (10 lb) 4 1043.8 N (233 lb)

44.5 N (10 lb) 5 2293.7 N (512 lb)

44.5 N (10 lb) 6 5048.9 N (1127 lb)

44.5 N (10 lb) 7 11.1 kN (2478 lb)

This table shows how the capstan acts as a force

multiplier. Because the coefcient of friction depends

upon the condition of the rope and capstan, this formula

cannot determine an exact amount of pulling force.

The Capstan as a Force Multiplier

Pulling Force: 35.6 kN (8000 lb)

Tailing

Force

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070

17

Cable Pulling Principles (cont’d)

Stored Energy

Cable Pulling Forces (cont’d)

At the Pulling Rope

The product of a force (f) moving through a distance

(d) is energy (f x d), and may be measured in newton-

meters or foot-pounds. Energy is stored in a rope when

the rope is stretched. This is similar to the way energy is

stored in a rubber band when it is stretched. Failure of

the rope or any other component of the pulling system

can cause a sudden uncontrolled release of the energy

stored in the rope.

For example, a 100-meter nylon rope with a 50,000

newton average breaking strength could stretch 40

meters and store 1,000,000 joules of energy. This is

enough energy to throw a 900-kilogram object, such as

a small automobile, 113 meters into the air.

A similar double-braided composite rope could store

approximately 300,000 joules of energy. This could

throw the same object only 34 meters into the air.

The double-braided composite rope stores much less

energy and has much less potential for injury if it were to

break.

Double-braided composite rope is the only type of

rope recommended for use with the Ultra Tugger cable

puller. Select a double-braided composite rope with

an average rated breaking strength of at least 143 kN

(32,000 lb).

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070

18

Cable Pulling Principles (cont’d)

Cable Pulling Forces (cont’d)

At the Connectors

The connectors will be subjected to the cable puller’s

maximum pulling force.

Several types of rope connectors—clevises, swivels,

and rope-to-swivel connectors—are available. Follow

the instructions provided with each to provide a good

connection.

Two types of wire connectors—wire grips and pulling

grips—are available. The wire grip uses a set screw

to clamp onto the conductors of the cable. The pulling

grip consists of a wire mesh basket that slides over

the cable and grips the insulation.

When selecting a pulling grip, it is extremely important

to select a grip of the correct (1) type, (2) size, and (3)

maximum rated capacity.

1. Select the correct type based on the descriptions

of each type in the Greenlee catalog.

2. Measure the circumference of the wire bundle.

(To do this accurately, fasten a tie strap around the

bundle. Cut off and discard the tail. Then cut the tie

strap and measure its length.). Use the table pro-

vided to nd the correct size.

3. See the maximum rated capacities in the Greenlee

catalog.

Pulling Grip Size Table

Circumference Range Required Grip Diameter

inch mm inch mm

1.57–1.95 39.9–49.5 0.50–0.61 12.7–15.5

1.95–2.36 49.5–59.9 0.62–0.74 15.8–18.8

2.36–3.14 59.9–79.8 0.75–0.99 19.1–25.1

3.14–3.93 79.8–99.8 1.00–1.24 25.4–31.5

3.93–4.71 99.8–119.6 1.25–1.49 31.8–37.8

4.71–5.50 119.6–139.7 1.50–1.74 38.1–44.2

5.50–6.28 139.7–159.5 1.75–1.99 44.5–50.5

6.28–7.85 159.5–199.4 2.00–2.49 50.8–63.2

7.85–9.42 199.4–239.3 2.50–2.99 63.5–75.9

9.42–11.00 239.3–279.4 3.00–3.49 76.2–88.6

11.00–12.57 279.4–319.3 3.50–3.99 88.9–101.3

12.57–14.14 319.3–359.2 4.00–4.49 101.6–114.0

14.14–15.71 359.2–399.0 4.50–4.99 114.3–126.7

A Typical Grip Setup—Clevis and Wire Grip

A Typical Grip Setup—Swivel and Pulling Grip

Maximum

Pulling Force

35.6 kN

(8000 lb)

Maximum

Pulling Force

35.6 kN

(8000 lb)

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070

19

Cable Pulling Principles (cont’d)

Typical Resultant Force at Sheave

Cable Pulling Forces (cont’d)

At the Sheaves

Sheaves are used to change the direction of the pull.

A change in direction creates a new resultant force

that may be greater than the cable puller’s maximum

pulling force. This new resultant force exerts itself on the

sheaves, sheave anchoring system, and support struc-

tures illustrated.

The resultant amount of force depends on the angle of

the change in direction. A brief table is provided here.

Refer to “Calculating the Hook Load” to determine the

resultant force at any angle.

Resultant Force Table for the Ultra Tugger

(35.6 kN or 8000 lb Maximum Pulling Force)

Illustration

Angle of Change

in Direction

Resultant Force

kN (lb)

180° 0 (0)

150° 18.5 (4160)

135° 27.4 (6160)

120° 35.6 (8000)

90° 50.2 (11,300)

60° 61.6 (13,800)

45° 65.8 (14,800)

30° 68.7 (15,400)

0° 71.2 (16,000)

Resultant Force =

27.4 kN (6160 lb)

35.6 kN

(8000 lb)

135

6800-22 Ultra Tugger

®

Cable Puller and Pulling Package

Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070

20

Formula 1:

R = 2 x T x SIN ((180 – θ) / 2)

R – the resultant force, or hook load; this force is exerted on the hook, anchoring and structural support

θ – the angle of change in rope direction

T – the tension exerted on the rope by the cable puller

Note: The total load on the support structure = R + the weight of the sheave.

Sheave with One Attachment Point

Cable Pulling Principles (cont’d)

Calculating the Hook Load

One Attachment Point

To calculate the hook load exerted at one attachment

point, use the Reference Table and Formula 1.

R

T

θ

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Greenlee 6800-22 6802-22 6805-22 Ultra Tugger ADB Manuel utilisateur

Greenlee 6800-22 6802-22 6805-22 Ultra Tugger ADB Manuel utilisateur

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