Chain Slings


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NOTE: 1ST LETTER INDICATES

2ND LETTER INDICATES TOP FITTING

3RD LETTER INDICATES LOWER FITTING

S = Single Branch

O = Oblong Link

O = Oblong Link

D = Double Link

S = Sling Hook

S = Sling Hook

T = Triple Branch

G = Grab Hook

G = Grab Hook

Q = Quadruple Branch

F = Foundry Hook

F = Foundry Hook

HOW TO ORDER ALLOY CHAIN SLINGS

Carefully review the aforementioned Alloy Chain Sling Information. The following details are required on orders or inquires.

  1. SIZE: This is specified by the size of the material from which the chain is made, determined by working load limit required.

  2. REACH: This is the length, including attachments, measured from bearing point to point.

  3. TYPE: Select and specify proper type of sling from list shown above, as per example on above D-Double, O-Oblong, S-Sling Hook.

  4. ATTACHMENTS: Unless otherwise specified, standard master links and hooks will be used. When other  standard master links or hooks are required, please provide a complete description or a drawing of the requested substitute.

CARE, USE & INSPECTION OF GRADE 80 CHAIN & SLINGS

CARE

  1. WORKING LOAD LIMIT Select the proper size chain for the job keeping within the working load limits shown. The angle of inclination of the chain sling branches must be considered in determining the chain size for the job.
  2. REMOVAL FROM SERVICE Before and after each use all chain slings regardless of type should be carefully inspected and if found defective removed from service immediately for repair or destruction.
  3. OVERLOADING Individuals responsible for chain slings should repeatedly check the capacity of chain slings and the angle of loads to be lifted, thus avoiding overloading, the primary cause of damage to chain slings.
  4. KINKS, TWISTS, KNOTS -These are to be avoided when applying the load to the sling..
  5. STRETCH Detect stretch by conducting a visual link by link inspection of the chain sling. Once a chain has been stretched it is unfit for further service and is to be replaced.
    Chain Size
    Max. Allowable Wear
    Chain Size
    Max. Allowable Wear
    1/4
    3/64
    5/8
    9/64
    3/8
    5/64
    3/4
    5/32
    1/2
    7/64
    7/8
    11/64
    Table B
  6. WEAR Wear occurs primarily on the inside of the links where the ad joining links are seated. When wear is noticed, separate each link, measure the bearing thickness at each end, and, if greater than TABLE B remove from service.

USE

  1. ORGANIZATION OF CHAIN SLING MAINTENANCE A regular Chain Sling Maintenance system should be set up which will make certain individuals fully responsible. The result will be properly cared for slings, which will receive regular periodic inspections, causing unsafe slings to be removed from service.

  2. CLEANING Chain Sling should be cleaned regularly as grit and dirt cause wear at link bearing point.

  3. STORAGE Before prolonged storage, Chain Slings should be oiled and hung in a clean, dry place. They should never be placed on the floor as they are subject to damaging abuse.

  4. ANNEALING Never anneal. Alloy chain is heat treated to provide high strength and long wear and annealing will damage the effects of the heat treatment.

INSPECTION

  1. CLEAN Clean before inspection to detect gouges, nicks, and bent links.

  2. HANG IN VERTICAL POSITION Provides quick preliminary inspection.

  3. MEASURE THE REACH If the uniform reach of the assembly exceeds 6% of the original length, the assembly is to be removed from service.

  4. STRETCH AND WEAR INSPECTION Lift each link and look for grooving. If grooving is not apparent, check clearance between links.

  5. LINK BY LINK INSPECTION Check each link -the following are danger signs: twisted and bent links, cracks in any selection of the link, marks, scores or nicks, pits from corrosion, lifted fins, (usually caused by overloads), wear at bearing points, stretched links, binding, caused by link collapse at the sides because of stretch or by being crushed under a load.

  6. ATTACHMENTS Check master links, pear-shaped links, rings, etc., for above defects. Look for spread in the throat of the hooks, Watch for gouged or deformed attachments.

 IMPORTANT WARNING:

Failure to follow the usage recommendation contained herein could result in premature failure of the chain possibly causing severe injury or death.

Grade 80 Alloy Sling Specifications
Chain Size Inches
Single Sling at 90° Angle
Double Sling at 60° Angle
Double Sling at 45° Angle
Double Sling at 30° Angle
Triple/Quadruple Sling at 65° Angle
Triple/Quadruple Sling at 45° Angle
Triple/Quadruple Sling at 30° Angle
Chain Size
1/4 4100 7100 5800 4100 10600 8700 6150 1/4
3/8 7300 12600 10300 7300 19000 15500 11000 3/8
1/2 13000 22500 18400 13000 33500 27500 19500 1/2
5/8 20300 35000 28500 20300 53000 43000 30500 5/8
3/4 29300 50500 41500 29300 76000 62000 44000 3/4
7/8 39900 69000 56500 39900 104000 85000 60000 7/8

DO NOT EXCEED WORK LOAD LIMIT OR 20% OF THE PRODUCT'S BREAK STRENGTH.
 

 

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Alabama Sling Center Inc. 2004