Will A Set Screw Add Security To A Clamp Style Shaft Collar?

Release Date: September 5, 2019

Is combining set screw and clamp styles actually the best way to maximize holding power?

Transcript

Location: Jupiter, FL
Question: Can I use a set screw in a clamp style shaft collar for added security?
Answer: This is a common question that comes up and misconception with shaft collars. Adding a set screw to a clamp type collar, one or two piece, will reduce holding power. Shaft collars rely on consistent connection between the bore and the shaft to evenly distribute clamping forces around the shaft. When you introduce a set screw this provided a counteracting force and requires the clamp hardware to use more of its strength to keep the collar clamped around the shaft, reducing the holding power. We almost always recommend against doing this, especially in a high leverage application like this. The best bet for the customer is to use the collar as is and be sure to test it in the application. If for some reason the holding power isn't enough they could always try stacking the collars which adds about 25% to the holding power.

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