Seating a bearing

Absolutely correct, Bill. My recommendation was to run 0.0002 tight. Same with the shaft. 0.001 tight on the shaft is too much for that size.
 
All bearings, of this type, have built in clearance. This is needed to prevent galling when the bearing gets to operating speed and temperature. As a general rule, most press fit applications require one thousands of an inch--per inch of diameter, but I have never used this rule with bearings. Most bearing applications have a (slip fit) meaning that they can be pushed in or lightly tapped into position. If there is a chance of the bearing working out, I would fabricate a retainer of some type.
 
Giles said:
All bearings, of this type, have built in clearance. This is needed to prevent galling when the bearing gets to operating speed and temperature. As a general rule, most press fit applications require one thousands of an inch--per inch of diameter, but I have never used this rule with bearings. Most bearing applications have a (slip fit) meaning that they can be pushed in or lightly tapped into position. If there is a chance of the bearing working out, I would fabricate a retainer of some type.
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Depending on the application you can also take a small punch and "peen" a few spots on the surface around the perimeter of the bearing after it's been installed.

-Ron
 
All of the replys to installing the bearing are very interesting. No expert, but if this were my project I would shoot for .0005 under on the plate. I would also try to machine some relief in the very bottom of the hole for any debri that may accumulate while pressing in the bearing. If there is no relief in the bore, the bearing may not set square in the bore. You may also want to consider a couple of small through holes so you can drive the bearing back out in the future. Learned this at the University of H. K.( Hard Knocks). Phil.
 
just my 2 cents worth I'd bore the pocket to .500 and use Locktite GREEN bearing set. the disadvantage of peening the perimeter is it will make changing the bearing impossible,and using a press might distort the races
 
Lotsa good stuff here, folks, thanks.

So far I'm coming to .0005 tight fit on both the pocket in the plate and on the shaft. I'll try for that. Also, will provide either relief at the bottom of the pocket or maybe even redesign it to be a thru-hole.

To answer some of the questions:

1. Materials: both plate and shaft are 6061 Al, temper unknown, but probably T6.
2. Rotational speed: low, 10 RPM max.

Thank you all.
 
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