Advice - choil that cuts across plunge line?

S

SolaBay

Joined
Sep 14, 2014
Messages
18
Hi all

Looking for some opinions here, fixed blade profiling...


My question is - to create a deep choil that cuts through the plunge line (attached some pics - BT4 is a classic example), how would you do it?



deep-choil.jpg



a) Create the choil before grinding the the bevels (to me this seems the most difficult because you'd then be starting your grind into "empty space" at the plunge line. I grind blade up so i'd be looking directly into the choil when I grind.)


b) Create the choil after grinding rough bevels, before HT?


c) Create the choil after finalizing the bevels, after HT?


d) None of the above :)


Any advice welcome, thanks
 
I also do mine after HT and final grinding though I've never done one as deep/large as those you are referencing. Still, should be easy enough with a small wheel.

Bob
 
Ok I'm curious, why would you do it after HT? Especially a big one like the OP is talking about? Seems like you would burn through a lot of sandpaper and risk your HT.
 
It's part of the profile. I do it before I grind my bevels, before heat treat. I find it no different than any other type of grind.
 
I grind mine before heat treat and after rough grinding the bevels. It's a good amount of steel to take off and it's likely to generate a lot of heat(bad post HT) and belt wear. I like to have the bevels most of the way done so I can use the plung as a reference point.
 
I do it after bevels so that I can get it as close to centered on the plunge line as possible.
 
After HT...because things sometimes get moved a tad in final finishing. Best center it where it ends up.
 
Stacy E. Apelt - Bladesmith said:
After HT...because things sometimes get moved a tad in final finishing. Best center it where it ends up.
Click to expand...

629hugo said:
I do it after bevels so that I can get it as close to centered on the plunge line as possible.
Click to expand...

This was my thinking as well - for me, the precise location of my plunge is only decided at the very final stage of grinding... It tends to migrate backward a bit from original position. So positioning a choil too early could be risky.
 
You must log in or register to reply here.
Back
Top