Sebenza grind changes?

[Andersonbushcraft]

When Chris Reeve Knives switched to magnacut, did they start to grind the edge thinner then switch back? I have two magnacut 31s from 24 and I just got two magnacut 31s from Eknives that had the same thickness of grind as my older s35vn 31.

The 2024 models has what looks to be a thinner grind than the other three. It feels slightly thinner when pinching it as well.

They are all lefties, purchased from knivesshipfree, knifejoy, bladegallery, and eknives.

I'll get a couple photos when I get home.

 

[Modernflame]

Based on my experience, I believe that there is and has always been variation in grind thickness within batches. There are other differences as well, such as the position of the plunge grind relative to the sharpening choil. It's no reflection of a change in strategy. It's a lottery.

It affects inkosis, too, though I've handled fewer of them.

 

[Peter Hartwig]

Believe them to be hand ground, so differences would seem normal, knife to knife much less different emloyees doing the grinding.

 

[Andersonbushcraft]

Based on my experience, I believe that there is and has always been variation in grind thickness within batches. There are other differences as well, such as the position of the plunge grind relative to the sharpening choil. It's no reflection of a change in strategy. It's a lottery.

It affects inkosis, too, though I've handled fewer of them.

Thanks for the info!

 

[Andersonbushcraft]

Its hard to see on the photos, but the first one is a 2025 and the second is a 2024. It appears a bit thinner when viewed in person and the sweep to the plunge seems longer and thinner.

 

[buckeyejake]

My zaan in magncut came with a very even edge. I have kept it sharp with a simple syderco sharpmaker.
The zaan is their flagship

 

[Sharp & Fiery]

My zaan in magncut came with a very even edge. I have kept it sharp with a simple syderco sharpmaker.
The zaan is their flagship

Pretty sure the Sebenza is their flagship.

 

[Andersonbushcraft]

My zaan in magncut came with a very even edge. I have kept it sharp with a simple syderco sharpmaker.
The zaan is their flagship

Sorry I mean the primary grind of the knife not the edge angle.

 

[badmatt]

Believe them to be hand ground, so differences would seem normal, knife to knife much less different emloyees doing the grinding.

They are CNC ground. Hand sharpened, yes.

 

[Andersonbushcraft]

They are CNC ground. Hand sharpened, yes.

Thats what I though, I was a bit surprised to see some variations on the grinds due to the tolerances chris reeves is known for. Unless there is some inherent variation from changing fixtures or jigs between production runs, i would assume you would see consistent grinds across the board for each model and specific blade type due to the cnc nature and the tightness of the blade thickness from the surfacing process.

 

[XJ-linux]

If you want to have some fun, look at the variations in the thumb jimping on the back of the blade by the pivot, between the Sebenza Classic/21/31's, and then within each of those models. There are subtle changes here and there, more squared, more rounded, more cuts, revert back again, etc...

 

[badmatt]

Thats what I though, I was a bit surprised to see some variations on the grinds due to the tolerances chris reeves is known for. Unless there is some inherent variation from changing fixtures or jigs between production runs, i would assume you would see consistent grinds across the board for each model and specific blade type due to the cnc nature and the tightness of the blade thickness from the surfacing process.

Potential cup wear. At the end of the day the tools do wear and offsets need to be changed. If the diameter of the cup changes the potential of tool offsets could go out the window as now you’re not grinding with an appropriate tool diameter.

Could also be that some materials are harder to grind, deflection and rigidity can be a concern. Feeds and speeds…. Feeds and speeds.

From what I understand the thumb serrations are also ground in at full hardness. As I mentioned above potential tool wear.

 

[Modernflame]

This is the thinnest Sebenza I have personally ever owned. Not only is it thin behind the edge (.017"), but the plunge grind has been chased back all the way under the handles.




Here is another example, which is more typical, but still on the thinner side with a longer transition into the plunge grind. Forgive the pocket lint.




I am somewhat obsessive about the way a Sebenza is ground. I want them like this. I figure I can use an Inkosi if I want thicker steel.