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Calculating Torque
Guide to understanding torque and how it relates to weight capacity

Calculating Torque

Our Drives are named with their max. torque rating as their model number (i.e. 4000 Flat Plate).  This number is commonly misinterpreted as the Weight Rating.  We do not create the whole lift, so it would be impossible for us to market our products with a weight rating.   It is intended for the lift creator to take our torque rating and determine if it falls within the amount of stress that their setup will introduce.  There are two calculators below for estimating torque on a lift. These calculators are oversimplified and are just to get a ballpark idea of torque on a lift.  Always follow your lift manufacturer's rated capacities.  

The
Blue calculator takes information about a lift and computes how much torque would be applied to each Gear Drive on the lift.  The default calculation is an example of a 5000 lb lift, using one of our hoists (could be any type - Flat Plate, E-Gear, etc), with cable winding onto a 2" pipe (2.375" OD), with a 2-Part line cable configuration.  With those specs, the calculator computes that 3,493 in lbs of torque are being applied to our hoist.  Therefore, any of our products labeled 4000 and up, should work on that lift*.  A 3000 model product would be overloaded.

The
Green Calculator is similar, but you select which of our models you are interested in using, and fill in the other lift specifications and it will compute the maximum amount of weight that could be lifted with that setup.  This number would include the fully loaded (wet) load as well as the moving part of the lift structure.  A lift could be rated at a lower number than what this computes in the real world, because other lift parts beyond our product might not be rated for as much of a load (i.e. cables, sheaves, cradles, slings, etc).

*These calculators are for base estimation purposes only.  The lift rating provided by your lift manufacturer will take into consideration all factors including lift cables, material types, etc.  Always adhere to the lift rating they provide you.  Our products are not for human lifting!