Ball Bearing Surfaces

DecayProduct · May 14, 2009

Do the balls in a bearing actually touch both races? If so, how does the thing turn? Won't the balls be moving in different directions at each race, and therefore dragging against one?

minger · May 14, 2009

Yes they touch. I don't think I understand your question though. Here are a couple of images to hopefully help you get it.

http://en.wikipedia.org/wiki/File:BallBearing.gif
http://en.wikipedia.org/wiki/File:Four-point-contact-bearing_din628_type-qj_180-ex.png

Realize that balls rather than regular roller bearings are used when thrust loads are needed to be taken. As such, they are typically (and most time need to be) loaded in one direction only.

TVP45 · May 14, 2009

DecayProduct said: ↑

Do the balls in a bearing actually touch both races? If so, how does the thing turn? Won't the balls be moving in different directions at each race, and therefore dragging against one?

There are two answers. In an ideal bearing, there is no sliding. In all real bearings, there is some sliding, but it is due to the deformation or angular mislaignment.

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Ball Bearing Surfaces

DecayProduct

minger

TVP45

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