Looking for information on maximum manual cranking force.

With manual handling or pushing/pulling it's well documented with charts showing guidance on maximum loads, but struggling to find the same type of guidance for cranking.

What I have found, (engineeringtoolbox.com) is :-

"for a standing person operating a rotating wheel or crank arm - the length of the arm (or radius of the wheel) should be approximately 0.4 m and maximum force should not exceed 130 N. The wheel or crank arm speed should not exceed 25 - 30 rpm. The center of the axle should be at approximately level h = 1 m."

This is exactly the level of information I'm looking for, but it doesn't state the source of this information and searching can't find anything on it.

Has anyone come across guidance on manual cranking forces ?

Originally Posted by: jfw

With manual handling or pushing/pulling it's well documented with charts showing guidance on maximum loads, but struggling to find the same type of guidance for cranking.

Are you refering to the pictograms in indg143?

The ones which follow the text: Use the guideline filters for lifting and lowering in Figure 1 to help you identify low-risk tasks. The Manual Handling Regulations do not set specific weight limits, so the guidelines are not ‘safe limits’ for lifting and carrying. They use broad assumptions or generalisations where, if met, the risk of injury is considered to be low.

If you were in the US I would agree there are published maximums as these are issued by the various insurance companies.

https://ergoweb.com/force-guidelines/ gives sources and explanations

tomeline REPORTED