Does anyone know where to buy a 1.125" and a .875" reamer with a 1/2" shank similar to VEX’s (to be used on a drill or drill press)? We want to ream out waterjetted bearing holes (1/4" Aluminum). We could also use the 1.126" reamers offered by VEX, but we aren’t sure if that would be too loose for the bearings.
Annular cutters are what we always fall back on for this. If the holes are already cut near their final size you’ll want a guide to keep the cutter centered (2x4 with the appropriate through hole seems to work well, but I like a chunk of uhmw or something slippery). Otherwise just have a pierce done to mark position and the use that as a pilot for the cutter.
Once you get the arbor, the cutters are affordable considering how long they last.
We’ve always had issues making bearing holes for the 1-1/8’’ od flanged bearings. Another mentor of ours got us http://www.hougen.com/cutters/magdrill/Hougen-Annular-Cutters.html#m2 hss
In 1-1/8. It is awesome! The hole is perfect, and borderline press fit. The bearing “pops” right in. A hit of locktight will keep the bearing in place , but we usually encapsulate it anyway so it can’t fall out.
We don’t have to ream at all.
I still have a 1-1/8" spade bit, the kind you use for wood, that I modified to cut bearing holes in 0.125 aluminum or thinner sometime around 2011. Yes it works. You cannot do it with anything other than a drill press however.
Just a little update 1072 has been using it and it has been very helpful. Anand turned it down on the lathe and we use it in hand drills to bore out bearing holes on plates and 2x1. The only thing is you have to be careful to keep it straight or it will catch and hurt your wrist… Its also pretty heavy and can tip the drill so keep that in mind. Other than that it has been great, would recommend!
A 1/2" reduced shank 1 1/8" drill bit will also work. Trick is low rpm and a very solid clamping solution. One big win over step bits is you can get nice square profile holes in thicker walled material and deal with narrow box section when you only want a bearing hole in one side.
We use step bits in thin walled material.
We use a heavy duty cross slide vice on a 16" drill press. Low rpm and slow feed rates makes for very nice holes.
This typically is a cheaper solution than many other cutters as you can get a high quality bit for under $40 USD.