pic: 4587-Sheet Metal Chassis V.2

[AdamHeard]

Originally Posted by Adrian Clark

However, there is no universal rule for bearing fits. What size you make the hole relative to the bearing OD depends on how tightly do want to retain the bearing if you want to retain it all, the size of the bearing, and what method you're using to make the bearing bore. There's a lot of info on this subject here on CD, the thread tim-tim linked to is a good place to start.

-Adrian

There actually are fit tables that can be used to calculate based on what type of fit you want.

For FRC though the standard is generally .0005-.001 under as you stated.