Quote:
Originally Posted by Henry_222
Pretty amazing that our bearings our still turning then I guess  .
At Engineer's Edge tolerances max are 2.3 thou on a 1.125 inch hole (R8 bearing O.D). Toss in some slop from the machine/jig and bam. From 7 ten thousandths over the maximum suggested tolerance to a perfect press fit in no time flat. Even without machine slop, straight measurement from one hole to its insert's O.D. we have done 3 thou. Funny thing is on a 1.125" hole that "good medium press fit" of ~.0004" is under the minimum interference listed. |
The above link is for press fitting solid hubs onto solid shafts, not fragile bearings into bores. Press fitting a bearing into delrin, 3 thou will work because the delrin has a lot of "give." In aluminum, I simply wouldn't do it. Even if it doesn't totally seize your bearing, you'll be putting unnecessary load on it taking away from its load capacity and potentially leading to accelerated wear.