Jump to content

Forging Endmills


Recommended Posts

I recently aquired an assortment of junk endmills from 3/4 to 1 1/4. Does anyone think its worth trying to forge them. I believe they are a cobalt hss thanks

Link to post
Share on other sites

To add to what Karim said, HSS is technically forgeable, but I've never been able to do it without creating the steel equivalent of cottage cheese. Personally I'd either send them to Boggs Tool for sharpening or scrap 'em, but that's just me. http://www.boggstool.com/page18.html

Link to post
Share on other sites

Another fun usage is for adding a bit of alloy content while hearth melting. 1 end mill with a bunch of other scrap could lead to something quite nice.

Link to post
Share on other sites

Probably M42. You need to forge them at 2000-2100 F. It probably will still be pretty hard at forging temps.

 

http://www.hudsontoolsteel.com/technical-data/steelM4

 

"Preheat to 1200-1400°F (649-760°C) and equalize. Then heat rapidly to 2000-2100°F (1093-1149°C) and equalize prior to forging. Reheat if work piece temperature falls below 1800°F (982°C)."

Link to post
Share on other sites

for example my profile pic is hss damask aka cottage cheese, terrible result but had fun

That looks.. interesting.

 

We talked about this before:

http://www.bladesmithsforum.com/index.php?showtopic=26663

 

I have lots of HSS bits and endmills because I have a mill and a few lathes. They're always useful after they chip or burn up. I regrind them to be form scrapers and stuff for fullers. They're already super hard, and you can silver solder them to mild steel without losing hardness.

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...