[Magnum164]

I am machining these parts and sent a few off for approval. One of my concerns is what is not shown in this picture is 4 mounting holes on the sides where 2 are centered around the bearing. When I cut this part and turn on its side for drilling/tapping, how can I zero the machine around the middle bearing hole?

For this particular part I don't think it will be an issue. But if I wanted to hold my closest tolerance there how could I do it?

[Don Clement]

I would mount the part in a vise bearing hole face up. Set a mill stop at one end. Using a center finding tool find the center of the bearing hole then zero machine coordinates. http://i72.photobucket.com/albums/i1...nterFinder.jpg Remove part and place in vise on end with the same end against the work stop. I like Kurt groove lock work stops but overhang over the vise may mean an external work stop. Machine mounting holes.

Don

[Magnum164]

Thanks Don! I was trying to over complicate it, I can just set the zero before even taking it off the machine.

[dirtridn2010]

I am machining these parts and sent a few off for approval. One of my concerns is what is not shown in this picture is 4 mounting holes on the sides where 2 are centered around the bearing. When I cut this part and turn on its side for drilling/tapping, how can I zero the machine around the middle bearing hole?

For this particular part I don't think it will be an issue. But if I wanted to hold my closest tolerance there how could I do it?

Did you bore the holes using a boring head or Circular interp. If the latter dow was the accuracy and roundness? Nice job.

[Magnum164]

Did you bore the holes using a boring head or Circular interp. If the latter dow was the accuracy and roundness? Nice job.

Oops.. Sorry that was a rendering I did of the part and sent to the customer. It helps to get the job if they can visually see what the part will look like. If I can get a pic of the actual part I will.

The bearing holes were cut using hole pocketing in SprutCam. I have to go back and see what the hole was actually cut at, but these last holes should have been a interference fit but the bearing was a little loose. But they were made before I resolved the zeoring issue on my machine so I am hoping the next batch will be correct. But the parts are still within tolerance, just not what I wanted.