Inteference Fit

Inteference Fit

This topic has 4 replies, 4 voices, and was last updated 4 April 2015 at 10:11 by mechman48.

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4 April 2015 at 08:35 #185459
Alan Rawlins
Participant
@alanrawlins60482
I want to machine a small ring of steel to fit a small 30mm outside diameter, ball bearing into it. I want to make sure that the outer ring of the bearing doesn't revolve when in use.

How much smaller should I turn the inside diameter of the ring relative to the bearing outside diameter without decreasing the internal clearance of the bearing so much that the bearing locks up, but still doesn't revolve in the ring?
Advert

4 April 2015 at 08:35 #32473
Alan Rawlins
Participant
@alanrawlins60482
Ball Bearing
4 April 2015 at 08:54 #185465
Eric Cox
Participant
@ericcox50497
You need to machine the diameter a few thou 0.002" larger than the bearing then use Loctite "bearing fit" to secure the bearing

Edited By Eric Cox on 04/04/2015 08:55:52
4 April 2015 at 09:18 #185468
Capstan Speaking
Participant
@capstanspeaking95294
I second Eric. A spacer ring is not rigid enough to resist an interference fit. It will simply swell up slightly.

An old craftsman will assess interference fits as push fit, drive fit or press fit. However a bearing fit is usually sufficient at 0.0002" / 0.005mm interference.
4 April 2015 at 10:11 #185478
mechman48
Participant
@mechman48
Do you have a 'Zeus' book handy…it gives you a listing of 'fits' for different sizes holes & shafts.. look in the transition fits..you would be in the region of H7/g6 for your needs… if you don't want to use Eric's Loctite method.

George
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