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Originally Posted by Monochron
Drilling a hole for a bearing is like soldering your electrical connections. Don't get it right the first time and you'll have to rework things a lot more.
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Well put.
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That said, drilling a hole can be a lot cheaper and simpler if you have the resources and tolerances.
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This is actually a fairly annoying manufacturing problem for a lot of teams. 1.125" drill bits aren't exactly commonly lying around. Step drill bits and metal hole saws will get you there, but not very accurately in terms of either location or diameter. I think the way 90% of FRC teams solve this is by milling their holes to size as most things with a 1.125" hole in them are done on a CNC of some sort.
The best way is probably to center-drill, drill that out with a variable-diameter bit to something like 1.12", then ream to desired fit (1.124", for example). The tricky thing is, even if you're willing to invest over $100 in a reamer, a lot of common school shop drill presses can't deal with the 1/2" shank. A hand reamer can do the job as well without the drill press, but they are also expensive and can be difficult to use.
Perhaps there's an obvious, easy solution I'm missing.
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Originally Posted by GeeTwo
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I think this is an unnecessarily snarky response when the object you're alluding to is often called a "pillow block", and when several FRC specific COTS products that do not have this functionality are called "bearing blocks". It's easy to understand how someone would have trouble associating bearing blocks in an FRC context with increasing ground clearance.
(I do realize that "pillow block" doesn't exclusively mean a bearing block where the bearing sits below / above the flange bolting the block to its surface, I've just seen it used as shorthand in an FRC context like that)