I have a 0.1" deep hole drilled into a circular piece of aluminum. Im press fitting a 3/16" ceramic bearing into the hole.
My parts I had made the hole is too large and its exactly 0.1875" ID.
The entire assembly is .995" in diameter. so I could possibly hold it in a 1 inch collet?
Then use a #9 drill bit to make the hole larger and then ill press a 5mm bearing into it.
I have a lot of these to do and I am not sure if setting up on the lathe, or maybe a jig on the mill might be the most efficient way to perform this 150 times or so.
Any input on the best way to set up drilling a centered, hole like this would be greatly appreciated.
So if I’m understanding this right, the bearings were supposed to be 3/16" & the chinglesh was then converted to 5mm for the od of the bearing? If it has to be a precise fit, then you will need to ream it to size. The work holding maybe a little tricky though as we do not have currently a 5C collet chuck for the lathe. If the part is only .100 deep, that will be even trickier to hold.
Is there any way to build a jig that lines up a couple of the holes to rotate around the piece? You would have a repeatable process to get the same results for each hole. The jig could also supply some support for the piece.
I agree with Tim - for precision you’ll need to use a reamer. You might be able to set it up on the lathe and feed the reamer with the drill chuck. Short of turning it by hand, I don’t know if the lathe will go slow enough.
You might be able to rig in on the mill holding it in V blocks. So long as you dial indicate in the center and lock the bed from moving it could work. The back jaw of the vise doesn’t move in the Y axis so it should position to the same every time. You’ll need a vise stop so you can reposition in the X axis. then you should be able to ream with reasonable precision.