Enzo trapper grind

[ledders666]

Hi.

I just purchased an trapper blade in Elmax and noticed that the bevel is a different length at the tip compared to the choil end.

I assume this is as it's ground from the same direction even as the blade starts to curve compared to always being ground 90degree to the bevel.

Does this make much difference ?.
I'm wandering if it's worth regrinding it before adding a handle.

Has anyone else come across this?

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[TLM]

From my experience some makers do that to get more strength to the tip. That is not unusual in a general purpose puukko. If it is used only in cutting things the bevel angle can be sharper without problems.

 

[gra_farmer]

As TLM stated, it is for tip strength, I have 2 Enzo trappers in scandi grind and they are the same.

 

[ledders666]

OK nice one thanks for the replies. Was just curious as other makes don't do it

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[gra_farmer]

Here is my enzo

 

[Stew]

It's not done for tip strength, though it might be a by product of the process.

It's because, as you rightly say, of the way the blade has been ground. The blade has been held in a fixed jig so the bevel gets shorter at the tip due to the curve. If the edge was kept parallel to the grinder then the bevel would be an even width throughout.

As to keeping it as is or regrinding, that's harder one to say - it depend on if you want a thicker bevel or not.

 

[gra_farmer]

Either way, I don't mind it at all and suits my needs

 

[ledders666]

Whilst I decide what would the best way/technique be to regrind it?

 

[Robson Valley]

Work with it for a dozen trips then decide if it needs modding. I'd rather have a little more steel behind the edge and the tip for poking holes in things like bean cans.

 

[gra_farmer]

A

Work with it for a dozen trips then decide if it needs modding. I'd rather have a little more steel behind the edge and the tip for poking holes in things like bean cans.

Agreed, I knock mine about and no signs of any damage. As a grind short cut, I think they have cracked it, brilliant to use.

 

[Nice65]

Work with it for a dozen trips then decide if it needs modding. I'd rather have a little more steel behind the edge and the tip for poking holes in things like bean cans.

Totally. I had Warrensmith design and make me a type of pointy, bear-claw scandi ground knife a few years ago, we called it the Shrike. Just using it to open holes to wind some screws into some fence posts and I felt a slight shatter as the very fine tip chipped. We got it sorted with a slightly softer heat treat and beefing up the tip.

Try it out, see how it goes.

 

[Billy-o]

Soft heat treat for the win, in general.

 

[Fadcode]

ledders666
"I assume this is as it's ground from the same direction even as the blade starts to curve compared to always being ground 90degree to the bevel."

Assuming the metal is 3mm thick and the height of the grind is 8mm, the angle the bevel would be ground at is 11 degrees, just in case you need to change it.

 

[Robson Valley]

11 degrees each side or what? Scalpels are 10 total.

A camp knife needs to be 20 total , just like the most expensive and best wood carving gouges. 11 or 12 is silly for general duty. Wood carving tells me that tools that are shocked, adzes, froes, spoke shaves, planes and the like, live longer at 25 degrees total included bevel angles.

I finish elbow and D adzes at 25. All my crooked knives are no more than 15, mostly 12.

 

[Fadcode]

The angle of grind is 11 degrees, if you turn the blade over and grind the other bevel at 11 degrees, then you could say it is 22 degrees total.
It is a mathematical formula depending on the thickness of the blade, and the height of the grind, Ideal for determining what angle the knife was ground at.

 

[Robson Valley]

Thank you. Because most of my wood carving tools have a single bevel on one face, I'm accustomed to the convention of speaking in terms of total included bevel angle.

 

[Nice65]

Thank you. Because most of my wood carving tools have a single bevel on one face, I'm accustomed to the convention of speaking in terms of total included bevel angle.

Nice work both you and Fadcode, I could see the geometry for both a single and opposite bevel, but utterly useless at explaining it.