General Categories > General Firearm Discussion
Best place for carbide bits... update with sort of finished 80% project on pg 2
metaldoc:
What Sparky said... ^^^^
Use High Speed Steel drill bits. Carbide can and will likely ruin the drill guides in your jig and certainly isn't needed to work aluminum.
RobertH:
So use high speed drill bits but carbide end mill is ok?
metaldoc:
High Speed Steel for the end mill as well. There are actually end mills made specifically for aluminum aren't necessary. Be sure to use a good cutting lubricant. I use Rapid-Tap for aluminum.
Check industrial tool suppliers in the Yellow Pages for Lincoln but you'll likely have the best luck online.
00BUCK:
Productivity Inc
8402 S 117th St,
La Vista, NE 68128
(402) 330-2323
Is where I buy my end mills. I have not had any issues using carbide to finish 80% lowers, in fact I prefer carbide over HSS.
RobertH:
off the top of my head, the 80% manufacturers suggest using carbide bits, that is why i was planning on using carbide. some of the carbide bits i have found on the net said they are designed for aircraft aluminum and some reviewers said they used it on an 80% lower.
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