Originally posted by I saw that!
The purpose of heating the bearing is to expand it slightly, so it will fit over the shaft more easily. Interference fits need either pressure or expansion/contraction of one part to fit together.
Shrinking the "inside" part - the shaft to fit the inner race, or the bearing to fit the outer race - is usually a safer option. Freezing the part will shrink it enough to fit, and is the normal practice in industry, at least for small to medium size bearings. In addition, it's easy to do at home and gives you more "working time" - just put the part to be shrunk in the freezer for 15 minutes.
Comment