What is the Lifting Chain ?

There are two standard grades for lifting chain. Grade 80 chain is made from alloyed steel and designed specifically for overhead lifting. It has a good strength-to-weight ratio and excellent durability. Grade 100 chain is also made of alloyed steel, but is hardened and tempered for superior durability and fatigue resistance. Most Grade 100 chain is made of Herc-Alloy 800, a heat-treated alloy with very high strength. Although many types of chain fittings are available, Grade 80 fittings should not be used with Grade 100 chain. At present TOOLEE GROUP only supply the grade 80 lifting chain

Selecting lifting chain requires an analysis of performance specifications. Chain size is measured in inches (in.) or millimeters (mm). Common sizes include 7/32 in. (5.5 mm), 9/32 in. (7.0 mm), 5/16 (8.0 mm), 3/8 (10.0 mm), 1/2 in. (13.0 mm), 5/8 in. (16.00 mm), 3/4 in. (20.0 mm), 7/8 in. (26 mm), and 1 1/4 in. (32.0 mm).

Nominal dimensions include inside length and inside width. The approximate number of links per foot (ft.) and the approximate weight (lbs.) per 100 ft. are also important considerations.

Working load limit and rated capacity vary with the angle of use and the number of chains used in a sling. For example, a single 5.5 mm lifting chain may be rated for 2100 lbs. at 90 degrees. A double 5.5 mm lifting chain may be rated for 60, 45, or 30 degree use with working loads of 3600, 3000 and 2100 lbs., respectively.

Lifting chain should meet requirements from organizations such as the U.S. Occupational Safety and Health Administration (OSHA), the American Society for Testing Materials (ASTM) and the International Standards Organization (ISO).

Working load limits for Grade 80 lifting chain are based on a 4 to 1 design factor from ISO.

In one sentence: LIFTING CHAIN IS THE ROUND LINK CHAIN USING FOR OVERHEAD LIFTING WITH MADE BY ALLOY STEEL, HEAT TREATED!

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