pre heat treat magnacut edge thickness

[abjsprite]

Hi
I dabble in knife making but have near 0 experience in heat treatment.
3 1/2 x 3/4 inch blade
.100 inch thick
flat grind
magnacut
Can anyone tell me from their own bad experience how thin I can grind the edge without it becoming disfigured during heat treat?
Thank you!!

 

[Crag the Brewer]

Hi
I dabble in knife making but have near 0 experience in heat treatment.
3 1/2 x 3/4 inch blade
.100 inch thick
flat grind
magnacut
Can anyone tell me from their own bad experience how thin I can grind the edge without it becoming disfigured during heat treat?
Thank you!!

If you are only .100" or less, id just keep the bevels off until after heat treat.
It's easier for the treater to clamp them in the plates. Keeps them flatter.

63-64HRC/Cryo
Who's doing the treatment?

Then grind, nice and wet.

 

[abjsprite]

If you are only .100" or less, id just keep the bevels off until after heat treat.
It's easier for the treater to clamp them in the plates. Keeps them flatter.

63-64HRC/Cryo
Who's doing the treatment?

Then grind, nice and wet.

I have always used Peters

 

[Richard338]

I leave about 0.03" on Magnacut for Peters'.

 

[Crag the Brewer]

I leave about 0.03" on Magnacut for Peters'.

But with such a thin blank to start with, is it even worth starting a bevel?

 

[Richard338]

Depends on the knife and my mood.
I was grinding some NitroV recently before heat treatment and it felt really gummy and kept grabbing and yanking, so I left it until after heat treatment. It was much smoother once hardened. I haven't had that issue with Magnacut.

 

[Thescrawnylumberjack]

I won’t pregrind most steels under .1 thick. Exceptions are anything with high carbide volumes.

 

[Seedy Lot]

I am the opposite, I prefer to grind 7dps bevels before ht treat even with low alloy steels.

 

[Crag the Brewer]

I am the opposite, I prefer to grind 7dps bevels before ht treat even with low alloy steels.

So you just like to torture me keeping them flat.....haha
Idk How I'm going to grind that last one at 1/4"

 

[Daniel Fairly Knives]

I grind just about everything post heat treat. You can easily run bevels at .020" and should be fine wih .008-012" if everything is just right.

I'd run them really thick if I were you unless yoiu are hand finishing... in that case I'd get to as close to as finished as possible.

You are almost certainly going to deal with a tiny amount of warp, etc so leaving things thicker gives you room for error.

 

[navman]

I just sent a batch of blades to include some .100 thick S90V B&T's...no bevels on them, just profiled and drilled. I have sent blades with edges as thin as .010" without a ripple, but the stock on those was thicker.