Crosby Line Parts Calculator

The following calculator has been developed to assist you in determining the number of parts of line to be used for a given load, the line pull or the lift capacity of a block.

Please select the calculation to be made

Calculating Recommended
Number of Parts of Line

Use this calculator to determine the recommended Number of Parts of Line needed when the weight of the load, the single line pull and the type of sheave bearing being used are known.
Units US Standard Units (lbs)
Metric Standard Units (t)
Total Load to be Lifted lbs.
Single Line Pull lbs.
Bearing Type Bronze Bushed
Roller Bearing

Recommended Number of Parts of Line when lifting 0 lbs. with a single line of pull of #### lbs., with Bronze Bushed sheaves is equal to

####    Parts of Line
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