Jump to content


Photo

Forging Endmills

Endmills

  • Please log in to reply
7 replies to this topic

#1 Jay Ramirez

Jay Ramirez
  • Members
  • 27 posts
  • Gender:Male
  • Location:Ogden Utah
  • Interests:Bushcraft, Bladesmithing, Traditional skills,manual machining , Antique tools, rusty stuff
    LAST BUT NOT LEAST THE 1972 PLYMOUTH BARRACUDA

Posted 08 November 2016 - 08:30 AM

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

#2 Karim

Karim
  • Members
  • 229 posts
  • Gender:Male
  • Location:The Netherlands
  • Interests:Expression of creativity

Posted 08 November 2016 - 09:19 AM

try it for fun, hss is a real pain whit narrow forging temperatures



#3 Alan Longmire

Alan Longmire

    Forum Board

  • Super Administrators
  • 12,281 posts
  • Gender:Male
  • Location:Johnson City, Tennessee, USA
  • Interests:World Domination

Posted 08 November 2016 - 11:15 AM

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



#4 Jerrod Miller

Jerrod Miller
  • Members
  • 1,075 posts
  • Gender:Male
  • Location:Spokane Washington
  • Interests:The outdoors, books, movies, medeival stuff, and of course blades and fire.

Posted 08 November 2016 - 11:55 AM

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.  



#5 WmHorus

WmHorus
  • Members
  • 1,022 posts
  • Gender:Male
  • Location:Coos Bay, Oregon
  • Interests:Alot

Posted 08 November 2016 - 03:29 PM

I knew someone that would take old 4" ers and press them into ashtrays


Quote
just use common sense.......dude your boned

#6 Brian C Madigan

Brian C Madigan
  • Members
  • 149 posts

Posted 08 November 2016 - 05:33 PM

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

 

http://www.hudsontoo...al-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)."



#7 Karim

Karim
  • Members
  • 229 posts
  • Gender:Male
  • Location:The Netherlands
  • Interests:Expression of creativity

Posted 08 November 2016 - 06:09 PM

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



#8 Brian C Madigan

Brian C Madigan
  • Members
  • 149 posts

Posted 10 November 2016 - 12:38 PM

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.bladesmit...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.






0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users