Cutting primary angles in a cnc mill

[brian923]

Hey guys, just got my first blank cut out of 01 on my cnc this weekend and was curious if anyone has ventured to cut the primary angles (bevels) on a cnc before heat treat. I know that you do not want to cut to a fine edge before heat treating the blade. Was just looking to see if I could remove as much material as possible before removing the blade from the fixture. Thanks guys!

 

[Nathan the Machinist]

Yes, it is common practice.

I use air hardening steels and mill them down under .015" without problem, same as grinding.

 

[Cox Workshop]

Check out Aaron's thread. Fascinating stuff.
http://www.bladeforums.com/forums/s...g-the-new-Resolute-with-the-help-of-CNC/page5

Also look up Grimsmo on youtube.

Although if Nathan wanted to start a youtube series on how he does it I know MANY of us would be fascinated to watch **hint hint**

 

[Nathan the Machinist]

Check out Aaron's thread. Fascinating stuff.
http://www.bladeforums.com/forums/s...g-the-new-Resolute-with-the-help-of-CNC/page5

Also look up Grimsmo on youtube.

Although if Nathan wanted to start a youtube series on how he does it I know MANY of us would be fascinated to watch **hint hint**

I documented my process in a WIP thread a couple years ago :http://www.bladeforums.com/forums/showthread.php/1048443-Advanced-Knife-Machining-WIP-Pointy-Fighter

A few details have changed over time, but that's fundamentally how I do it.

 

[Cox Workshop]

I documented my process in a WIP thread a couple years ago :http://www.bladeforums.com/forums/showthread.php/1048443-Advanced-Knife-Machining-WIP-Pointy-Fighter

A few details have changed over time, but that's fundamentally how I do it.

Missed this one somehow. I know what I'm going to be doing when I get home tonight! Thanks Nathan.

 

[Ken H>]

I documented my process in a WIP thread a couple years ago :http://www.bladeforums.com/forums/showthread.php/1048443-Advanced-Knife-Machining-WIP-Pointy-Fighter

A few details have changed over time, but that's fundamentally how I do it.

Yep Nathan - that is a GREAT thread and I've read thru it a few times, and sent to friends who are interested in CNC work.

Ken H>

 

[brian923]

Nathan, watched your WIP... thank you.... that was awesome. Gave me a whole bunch of ideas!

 

[Nathan the Machinist]

Thanks guys, I'm glad you folks got some use out of it. WIP threads are a lot of work, I haven't done one in a long while.

I'd use a mill to rough bevels even if I didn't use CNC. In the grand scheme it might not be faster or cheaper or better, but it's a great way to get an edge centered and straight without a lot of mess, heat or drama. It's a less brute force and more cerebral approach to the craft, requiring more thought and less grunt. And chips rather than dust.