Quote:
Originally Posted by sheepherder
Olle called my attention to a special cutter from Harvey Tool that he uses. I have their catalog, I'll see if I can find it.
Here we go...Corner rounding end mills...
http://www.harveytool.com/cat/Corner...ducts_200.aspx
Maybe if Olle sees this, he can say which one works best. 
I just use what I've got. The cutter from Harvey would cost more in postage than the cutter itself. Plus Harvey doesn't sell to the general public; you have to order from one of their distributors.
I have a couple of Harvey's keyseat cutters specifically for Luger front sight inserts, but they are fragile.  |
Here's the one I use:
http://www.harveytool.com/ToolTechIn...olNumber=17062. I run it to the correct depth, then I widen the cut 10/1000" left/light (total 20/1000"). It's probably as close as you will get to the correct shape without custom ordering, and it gives you an original looking cut and the proper clearance for the extractor.... or at least I haven't heard otherwise from GT.
I'm sure you can find a cheaper tool from China, but the cool thing about Harvey's catalog (as opposed to eBay) is that they have a plethora of diameters and shapes to choose from and the tools are top quality. The 17062 cutter is very close to specs, and should last longer than the Chinese bits as well. Tiny bits like this (especially in carbide) chatter and break easily when they start going dull, and it normally happens A: Friday afternoon and B: When you have a deadline to meet. IMO it pays off to buy good quality if your'e planning to do several barrels.