01-20-2013, 01:41 PM
(This post was last modified: 01-20-2013, 01:48 PM by Sunset Machine.)
Half-hard, turned, ground and polished 4140 (goes by 4140 HT TGP PH and other names). It's called "machinable", it's pretty hard but softer than a chisel. Store-bought, saw off a bit and press it in the hole. .001" undersized.
http://www.speedymetals.com/information/Material63.html
Small part like that could be made of O1, red-hot with just a propane torch & oil quench. Shine it up a bit with emery cloth and re-heat to, say, purple and quench again. It'll be hard enough to cut metal and hit with a hammer, like a chisel. Instead of purple, go light yellow and it'll be as hard and brittle as a lathe bit.
edit: Just a thought, but that might be a standard pin you could find at Enco, MSC, McMasters, etc.
http://www.speedymetals.com/information/Material63.html
Small part like that could be made of O1, red-hot with just a propane torch & oil quench. Shine it up a bit with emery cloth and re-heat to, say, purple and quench again. It'll be hard enough to cut metal and hit with a hammer, like a chisel. Instead of purple, go light yellow and it'll be as hard and brittle as a lathe bit.
edit: Just a thought, but that might be a standard pin you could find at Enco, MSC, McMasters, etc.