Need help with cutter/setup

[capnjack]

I'm using a 3/32 round cutter for two woodruff key slots on a 4" bolt. I'm having a hard time repeating from part to part. Not exactly sure how to center the cutter. Any ideas/ help on setting this up?

I was also wondering if an endmill would be a better way to go.

Thanks in advance!


Sorry if this is the wrong area to post, I'll move it if it is

[RCaffin]

I'm using a 3/32 round cutter for two woodruff key slots on a 4" bolt. I'm having a hard time repeating from part to part. Not exactly sure how to center the cutter. Any ideas/ help on setting this up?

Is the job important, and do you have more than a couple to do?
Then start by making up a proper mounting jig. Takes time, but the end results are so much better.

I was also wondering if an endmill would be a better way to go.

Depends on material, depth, shape ... Can't say in advance. Test.

Cheers