11-09-2018, 11:38 PM
I couldn't recruit a camera man on short notice, but I spent some time on this project today too. I didn't get the Tempilaq out, but I did some background research in order to try to quantify how much material we are talking about removing.
I chose an old Old Hickory with 1095 carbon steel at about HRC 55-56, which is way too soft for 1095, but you still get a nice heavy shower of sparks which is unavoidable with carbon steel.
I used a half worn 220 grit belt, which generates much more heat than a new belt, and removes much less material than a coarser belt. I drew lines across the blade so I could measure accurately, and they also helped keep my speed across the belt consistent.
Hopefully these pictures are worth a dozen words... I was consistently removing about .001" of blade height with a normal pass on each side. That's a whopping 25µ !!
Trying to get the blade warm, I started chisel grinding the edge. I took one pass/side which removed 15X the material. Nothing. I took another pass which removed 40- 50X more than a normal pass.
I'm sorry, I'm getting practically no heat. It's warm to the touch, but that's it. I was able to blue a minuscule part of the tip, but it took some effort to build the heat to accomplish it.
![[Image: mkl8Km4.jpg]](https://i.imgur.com/mkl8Km4.jpg)
![[Image: HpqbnyI.jpg]](https://i.imgur.com/HpqbnyI.jpg)
I chose an old Old Hickory with 1095 carbon steel at about HRC 55-56, which is way too soft for 1095, but you still get a nice heavy shower of sparks which is unavoidable with carbon steel.
I used a half worn 220 grit belt, which generates much more heat than a new belt, and removes much less material than a coarser belt. I drew lines across the blade so I could measure accurately, and they also helped keep my speed across the belt consistent.
Hopefully these pictures are worth a dozen words... I was consistently removing about .001" of blade height with a normal pass on each side. That's a whopping 25µ !!
Trying to get the blade warm, I started chisel grinding the edge. I took one pass/side which removed 15X the material. Nothing. I took another pass which removed 40- 50X more than a normal pass.
I'm sorry, I'm getting practically no heat. It's warm to the touch, but that's it. I was able to blue a minuscule part of the tip, but it took some effort to build the heat to accomplish it.