Quote:
Originally Posted by steelerborn
The McMaster Carr bearings are round bearings not half inch hex, if you lathe down the shafts you can use the round bearings. So I am not comparing apples to pineapples or something.
No I haven't reached out to vex however I still believe they should put the bearing specs on their website. And I don't believe that the bearings specs are in excess for every single frc application. I believe that their max rpm is a lot lower than everyone "assumes". I will reach out to vex about their bearing specs. But 1000 rpm difference with only a bearing swap is very significant in my eyes.
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Did you miss the part where the OP said turning his shaft to round won't work for his application?. That basically means McMaster bearings won't work and he's "stuck" using commercially available hex bearings.
For what it's worth, I've never seen a problem with any of the hex bearings we've used - either custom applications or as provided in some commonly used gearboxes.
If you can contact vex and get a spec for them, you'll know for sure if it'll hold up for your application. If it doesn't, you could try something my team did last night... For one application, we have a hex shaft that we needed to put a specialty bearing (specifically a one way bearing... Those things are so cool!) right in the middle, and a hex bearing just wouldn't work. So instead we got a 3/4 ID version of the bearing, a 3/4 shaft, and bored a 1/2" hex hole in the middle. That lets us put the bearing on the 3/4 shaft, and the 3/4 shaft on the hex shaft wherever we want it, while preserving the hex on either side of the bearing for other applications.