STRAIN RELIEF CLAMPS - Mine Cable Services · PDF fileReplaces Kellam grips, rope and strain relief methods on shovels, draglines, drills, ... A list of the individual types is shown

Mine Cable Services Corporation 7731–16th Street

Edmonton, Alberta, Canada, T6P 1M1

Tel: (780) 439-1113 Fax: (780) 439-4443

Toll free: (800) 663-2889

Email: [email protected]

STRAIN RELIEF CLAMPS



Tel: (780) 439-1113 Fax: (780) 439-4443

Toll free: (800) 663-2889



MCS strain relief clamps are available for cables with diameters ranging from 0.625”

through 3.500”. These clamps are being used extensively in the mining industry.

Some of the major advantages are shown below:

1. Can be installed on cables already in services, i.e. split construction.

2. The rubber inserts cushion the cable while providing a secure grip.

3. No steel strands in contact with the cable to penetrate the cable jacket.

4. Replaces Kellam grips, rope and strain relief methods on shovels, draglines, drills,

pole drops and underground equipment.

Complete Listing of Strain Relief Clamps Offered

1. Type PLW-X Unidirectional Strain Relief Clamp (“Arrowhead”)

2. Type PRW-X Bi-directional Strain Relief Clamp (“Football”)

3. Type VLW-X Vertical Strain Relief Clamp

4. Type WCSS-X Wrap Around Cable Support Sleeve

5. Type PHW-X “Torpedo” Strain Relief Clamp

6. Type F14W-X “Stinger” Strain Relief Clamp

7. Type RC14W-X Road Crossing Support Strain Relief

8. Type CDR-36 Cable D-Rings



Tel: (780) 439-1113 Fax: (780) 439-4443

Toll free: (800) 663-2889



Mine Cable Services manufactures a complete line of strain relief clamps for the

mining industry. A list of the individual types is shown below. We also manufacture

special clamps to either our own, or customer specifications.

POLYURETHANE

Type PLW-X Manufactured from polyurethane, these “Arrowhead” clamps are designed for

use at substations, cable couplers, pole drops, and anywhere a flexible

attachment is required.

Type PRW-X The “Football” clamp is similar to the PLW-X clamp, but with a recessed strain

collar and a nylon or polypropylene sling. This permits the clamp to be used in

areas where other clamps may do damage to the cable itself, for example in a

cable reel application.

Type VLW-X Polyurethane wedge inserts combine with a steel housing to provide positive

clamping of the cable when a constant tension is applied. These clamps are

used at pole drops, mine shafts, and other vertical applications.

Type PHW-X The “TORPEDO” is generally used in conjunction with the “SATELLITE” or

similar device near an excavation shovel. The clamp is applied to the cable

itself connected to the “SATELLITE” (or similar device). When the shovel

bucket lifts the “SATELLITE”, the cable is protected against severe bending by

the “TORPEDO”. Please refer to section 9 of our main catalogue for more

information.

Type F14W-X The “STINGER CLAMP” is designed specifically for relieving the tension on the

tail cable at the rear of the shovel. The clamp is welded to the stinger of the

shovel. The rubber liners may be changed to accommodate cable of different

sizes.

Type RC14W-X The Road Crossing Support series of clamps are designed to support the cable

in a gentle curve, (no less than that recommended by the cable manufacture)

when hoisted to cross a main haul road. End clamps ensure that the cable will

not slip. Along with the Rope Brake (CSL-001) and pulleys, the RC14W forms

part of our Road Crossing Support System found in section 9 of this catalogue.

Also, due to its reinforced design, the Road Crossing Support may be used for

towing cable behind a light duty truck for quick repositioning, similar to the

cable D-Ring below.

Mine Cable Services Corporation. 7731–16th Street Edmonton, Alberta, Canada, T6P 1M1

Tel: (780) 439-1113 Toll Free: (800) 663-2889(US & Canada) Fax: (780) 439-4443

www.minecableservices.ca

ALLOY STEEL

Type CDR-36 The Mine Cable Services Cable D-Ring is a heavy duty aluminum

constructed device that is designed to hold trailing cable securely in

position while being relocated. The CDR is able to accommodate cable

up to 3.500”. The cable is held in position with a heavy duty, adjustable

pressure clamp.

OTHER MATERIALS

Type WCSS-X The Wrap Around Cable Support Sleeve is fabricated from heat shrink

material and is applied as a permanent strain relief clamp. It may be

used at switch houses, coupler or shovel locations, or at pole drops.

Once applied the clamp cannot be re-used.



Tel: (780) 439-1113 Fax: (780) 439-4443

Toll free: (800) 663-2889


“ARROWHEAD” STRAIN RELIEF CLAMP

Catalogue No. PLW-X

PLW-X Strain Relief Clamp with Steel Aircraft Cable, clamps and sized to

specific outside diameter of your cable.

This type of clamp is excellent for suspending a length of trailing cable or

anchoring a length of trailing cable connected to a junction box,

substation or other horizontal applications. The clamp is designed to grip

the cable over an adequate length, while at the same time offering the

cushioning effect of rubber. This clamp eliminates the use of straps,

ropes, and other methods which contribute significantly to the failure of

various types of cable.

Mine Cable Services Corporation. 7731–16th Street, Edmonton, Alberta, Canada, T6P 1M1



CATALOGUE NO. PLW-X

The PLW-X series of “Arrowhead” Strain Relief Clamps are manufactured from tough & weather resistant

polyurethane, stainless steel clamps and a central steel tension saddle. The clamp is designed for use on

draglines, shovels, drills, substations and pole drops where some flexibility of movement is needed.

1. Mining Cable 4. ½” Stainless Steel Hexhead Capscrew 7. 5/16” Dia. Aircraft Cable w/thimble eyes

2. Polyurethane Body 5. ½” Steel Flat Washer 8. Stainless Steel Hose Clamps

3. Steel Tension Saddle 6. ½” Stainless Steel Hexnut

The polyurethane body is composed of two identical halves which allow the relief clamp to be installed

on cable already in operation. Each body is designed to fit a small range of cable diameters. When

installed, the clamp is secured with two stainless steel hose clamps and a central steel tension saddle

which is connected to the mining equipment by 5/16” aircraft cable.

This type of clamp is excellent for suspending a length of trailing cable or anchoring a length of trailing

cable connected to a junction box, substation or other horizontal applications. The clamp is designed to

grip the cable over an adequate length, while at the same time offering the cushioning effect of rubber.

This clamp eliminates the use of straps, ropes, and other methods which contribute significantly to the

failure of various types of cable.

Cat. No. Cable Range

PLW-A 0.625”-0.875”

PLW-B 0.875”-1.125”

PLW-C 1.125”-1.375”

PLW-D 1.375”-1.625”

PLW-E 1.625”-1.875”

PLW-F 1.875”-2.125”

PLW-G 2.125”-2.375”

PLW-GH 2.250”-2.500”

PLW-H 2.375”-2.625”

PLW-J 2.625”-2.875”

PLW-K 2.875”-3.125”

PLW-L 3.125”-3.375”

PLW-M 3.375”-3.625”

2

6 5 4

3 1

7

8



Tel: (780) 439-1113 Fax: (780) 439-4443

Toll free: (800) 663-2889


“FOOTBALL” STRAIN RELIEF CLAMP

Catalogue No. PRW-X

PRW-E shown in service in underground tunneling operation

Mine Cable Services offers a number of strain relief clamp options, however the

most popular, by far, is the PRW-X “Football” strain relief clamp. Sized according to

your specific cable diameters, these PRW’s are manufactured from solid

polyurethane and are proven to be rugged and stand up to the wear and tear of a

daily mining operation.

[See sizing chart on following pages. Please contact Mine Cable Services for current catalogue pricing.]




CATALOGUE NO. PRW-X

The PRW-X series of “Football” Strain Relief Clamps are designed for use on draglines, shovels, or cable

reeling devices where a protruding steel saddle and steel cables would not be allowed.

1. Mining Cable 4. ½” Stainless Steel Hexhead Capscrew 7. 1” High Tensile Strapping

2. Polyurethane Body 5. ½” Steel Flat Washer 8. Stainless Steel Hose Clamps

3. Steel Tension Saddle 6. ½” Stainless Steel Hexnut

This model is manufactured using durable, high durometer polyurethane rubber. These clamps come

in two halves for installation over previously installed cable. The two halves are secured with

stainless steel hose clamps, a fully recessed steel saddle, stainless steel eyebolts and high tensile

webbing straps. These straps allow the clamp to be used on cable reels and in other locations where

protruding steel cables and a saddle may cause damage.

This type of clamp is excellent for suspending a length of cable or using it to anchor a length of cable

connected to a junction box, substation, or to just about anything horizontally because the clamp is

designed to grip the cable over an adequate length while at the same time offering the cushioning

effect of rubber.


PRW-A 0.625”-0.875”

PRW-B 0.875”-1.125”

PRW-C 1.125”-1.375”

PRW-D 1.375”-1.625”

PRW-E 1.625”-1.875”

PRW-F 1.875”-2.125”

PRW-G 2.125”-2.375”

PRW-GH 2.250”-2.500”

PRW-H 2.375”-2.625”

PRW-J 2.625”-2.875”

PRW-K 2.875”-3.125”

PRW-L 3.125”-3.375”

PRW-M 3.375”-3.625”



Tel: (780) 439-1113 Fax: (780) 439-4443

Toll free: (800) 663-2889


VERTICAL “V” STRAIN RELIF CLAMP Catalogue No. VLW-X

The MCS series of Vertical “V” clamps consist

of a welded steel housing and two

polyurethane wedges. This clamp is

designed for use in vertical mine shafts and

other applications where the cable itself

applies a constant directional tension.

Catalogue No. Cable Range:

V9W-A 0.625”-0.875”

V9W-B 0.875”-1.125”

V9W-C 1.125”-1.375”

V9W-D 1.375”-1.625”

V9W-E 1.625”-1.875”

V9W-F 1.875”-2.125”

V12W-G 2.125”-2.375”

V12W-GH 2.250”-2.500”

V12W-H 2.375”-2.625”

V12W-J 2.625-2.875”

V12W-K 2.875”-3.125”

V12W-L 3.125”-3.375”

V12W-M 3.375-3.625”

1. Steel Base Assembly

2. Polyurethane Wedges

3. Cable

The welded steel housing has two main components; the body and a cross latch which ensures that the

cable tension does not cause the steel body to deform. The body is installed on mine shaft timbers and

the cable trained into the cavity. Once all cable clamps and the cable are in place, the polyurethane

wedges are inserted around the cable from the top opening and driven into place. The main cable clamp

restraint is loosened and the cable is allowed to settle into the distributed cable “V” shaped cable clamps.

The clamp eliminates all other forms of vertical support. Each body and wedge assembly is designed for

a small range of cable diameters. This ensures the user that a particular cable is supported within a close

tolerance. Other uses are vertical pole drops in mine and utility applications, the support of vertical pipe

runs or horizontal cable runs where cable tension is reasonably constant.

Mine Cable Services Corporation. 7731–16th Street


Tel: (780) 439-1113 Fax: (780) 439-4443

Toll free: (800) 663-2889


WRAP-AROUND CABLE SUPPORT SLEEVE Catalogue No. WCSS-X

TABLE OF DIMENSIONS

CATALOGUE NO. A

CABLE RANGE

(IN/MM)

B

SLEEVE

WIDTH

C

SLEEVE LENGTH

WCSS-170/35 1.30” to 0.375”

34mm to 10mm

7.1”

180.3mm

12”

300mm

WCSS-280/60 2.08” to 0.50”

53mm to 13mm

11.0”

279.4mm

12”

300mm

WCSS-360/100 3.30” to 0.75”

84mm to 20mm

13.75”

349.2mm

15”

400mm

WCSS-470/110 4.25” to 1.14”

107mm to 29mm

17.12”

434.8mm

15”

400mm



Tel: (780) 439-1113 Fax: (780) 439-4443

Toll free: (800) 663-2889


“TORPEDO” STRAIN RELIEF CLAMP *For use with “Satellite” Wire Balls

Catalogue No. PHW-X

The “Torpedo” Strain Relief Clamp is designed for use with the MCS “Satellite” Wire Ball found in section

10 of this catalogue. The Torpedo Body is held in place using two steel saddles and two steel retaining

clamps and can be connected to an MCS Satellite Wire Ball using a steel cable or rope and a steel shackle

(as shown). When the “Satellite” Wire Ball is lifted by the shovel bucket, the “Torpedo” Strain Relief

Clamp is also lifted, supporting the cable in a gentle bend radius, thus protecting the cable from strain

damage.

Ordering Information:

Catalogue Number: Cable Range:

PHW-A 0.625” - 0.875”

PHW-B 0.875” – 1.125”

PHW-C 1.125” – 1.375”

PHW-D 1.375” – 1.625”

PHW-E 1.625 – 1.875”

PHW-F 1.875” – 2.125”

PHW-G 2.125” – 2.375”

PHW-GH 2.250” - 2.500”

PHW-H 2.375” – 2.625”

PHW-J 2.625” – 2.875”

PHW-K 2.875” – 3.125”

PHW-L 3.125” – 3.375”

PHW-M 3.375” – 3.625”



Tel: (780) 439-1113 Fax: (780) 439-4443

Toll free: (800) 663-2889


“STINGER” STRAIN RELIEF CLAMPS

Catalogue No. F14W-X

MODEL F14W-XX

The F14W-XX Strain Relief Clamps are manufactured with a steel shell and

replaceable polyurethane liners set. The clamp is designed for use on shovels,

draglines, drills and substations where a fixed (welded or bolted) clamp is required.




1. Mining Cable

2. Steel Shell

3. Mounting Base

4. Polyurethane Liner- fit to cable size

5. Welded Steel Hinge

6. Oversized Brass Hex Nut (vertical)

7. Steel Flat Washer

8. Retainer Nut (horizontal)

The shell components are hinged on one side allowing the clamp to be opened. Polyurethane liners are

fitted into each shell half and are sized for a specific cable range. When closed, the clamp is secured with

stainless steel eyebolts and oversized brass hexnuts allowing considerable closing force to be exerted.

The clamp and polyurethane liners were designed to grip the cable over a significant length, while at the

same time provide cushioning which eliminates any cable damage.


F14W-A 0.625" - 0.875"

F14W-B 0.875" - 1.125"

F14W-C 1.125" - 1.375"

F14W-D 1.375" - 1.625"

F14W-E 1.625" - 1.875"

F14W-F 1.875" - 2.125"

F14W-G 2.125" - 2.375"

F14W-GH 2.250" - 2.500"

F14W-H 2.375" - 2.625"

F14W-J 2.625" - 2.875"

F14W-K 2.875" - 3.125"

F14W-L 3.125" - 3.375"

F14W-M 3.375" - 3.625"

F14W-N 3.625" - 3.825"

F14W-P 3.825" - 4.125"

F14W-R 4.125" - 4.375"



Tel: (780) 439-1113 Fax: (780) 439-4443

Toll free: (800) 663-2889


ROAD CROSSING SUPPORT STRAIN RELIEF (For use with complete road crossing system)

Catalogue No. RC14W-XX

The Road Crossing Support is available in a range of sizes to accommodate different cable diameters from

as small as 0.625” – 3.625”. Manufactured from 80 Durometer Polyurethane, the RC14W-X is designed to

cradle the mining cable as it crosses the haul road. The center support straps ensure that the cable is

supported at the correct position while the end clamping straps are designed to prevent slippage as the

cable is raised into position.

Ordering Information:

Part no. Cable Range: Part no. Cable Range: Part no. Cable Range:

RC14W-A 0.625-0.875” RC14W-F 1.875-2.125” RC14W-J 2.625-2.875”

RC14W-B 0.875-1.125” RC14W-G 2.125-2.375” RC14W-K 2.875-3.125”

RC14W-C 1.125-1.375” RC14W-GH 2.250-2.500” RC14W-L 3.125-3.375”

RC14W-D 1.375-1.625” RC14W-H 2.375-2.625” RC14W-M 3.375-3.625”

RC14W-E 1.625-1.875”



Tel: (780) 439-1113 Fax: (780) 439-4443

Toll free: (800) 663-2889


CABLE D-RING STRAIN RELIEF

Catalogue No. CDR-36

The MCS Cable D-Ring is designed to assist mine operators in moving or relocating trailing

cable short distances by dragging behind a light duty vehicle on your site. The curved cradle

eliminates cable damage, while the adjustable clamp reduces cable slippage. This is an effective

way to move your cable around the worksite while keeping a safe bending radius and offering

adequate strain relief. The MCS Cable D-Ring is light weight in design and is intended for

storage in the back of a minesite vehicle, for quick application when a temporary strain relief

clamp is required.

Documents

STRAIN RELIEF CLAMPS - Mine Cable Services · PDF fileReplaces Kellam grips, rope and strain relief methods on shovels, draglines, drills, ... A list of the individual types is shown