Keyed shaft coupling
Keyed shaft coupling
(OP)
I'm evaluating the torque rating of a rigid keyed shaft coupling. Various references I have omit the case of a hollow "tube" with the keyway cut all the way through for evaluating the stresses. Can anyone shed some light on how to account for the keyway? Thanks in advance





RE: Keyed shaft coupling
RE: Keyed shaft coupling
RE: Keyed shaft coupling
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RE: Keyed shaft coupling
you must have something in mind, 'cause i would know how to calculate the allowable stress without being able to define the applied load (the torque) ... allowable stress on what (area)? i'd expect to apply a torque to the structure, and then calculate the stresses, and decide if they are acceptable or if there needs to be a change to the structure. 'cause the allowable stresses are material dependent (ftu, fsu, endurance limits, etc)
i guess you could apply a unit torque ...
RE: Keyed shaft coupling
RE: Keyed shaft coupling
1) shearing the key ... allowable torque = key cross-section*(key Fsu)*radius (say to the middle of the key); and
2) shearing the coupler around the key ... maybe (coupler Fsu)*net area of the coupler*radius
this assumes you're looking for a static load, and of course ... cavet emptor
RE: Keyed shaft coupling
Have a look at this site:-
http://ww
regards
desertfox
RE: Keyed shaft coupling
If you post the shaft, key and hub dimensions and material along with torque and rpm and how it is to be used more specific detailed information could be posted
Ed Danzer
www.danzcoinc.com
www.dehyds.com
RE: Keyed shaft coupling
RE: Keyed shaft coupling
If it's a very loose fit, then most of the torque is transmitted by the key as I think you are assuming.
If it is a very tight fit, then most of the torque is transmitted by the fit, not the key. But there are still stresses created by virtue of the interference.
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