Full height grind

[Gradyw]

whats the purpose of a full height grind supposed to having a shoulder in the knife? Does the shoulder add more strength for stuff like batoning and a full height make a better slicer... that's my guess just want to be sure

 

[Petunia D. Feeble]

whats the purpose of a full height grind supposed to having a shoulder in the knife? Does the shoulder add more strength for stuff like batoning and a full height make a better slicer... that's my guess just want to be sure

Yep

 

[Gradyw]

Well I have one more question cause I just bought a caliper.. when ppl talk about the size behind the edge are they referring to the shoulder or just directly behind the apex?

 

[adamlau]

Behind the apex.

 

[Gradyw]

That's a hard thing to measure accurately..

 

[AF]

They're referring to the shoulder right behind the edge bevel.
Also in your first post you're calling a non-full height grind a shoulder. Most people call this grind a saber grind.
Check this out-
https://www.spyderco.com/edge-u-cation/knife-anatomy/blade-grinds/

 

[Petunia D. Feeble]

"Behind the edge" typically refers to the point at which the sharpened bevel stops.

 

[Gradyw]

Yea I know what a Sabre grind is and I guess I didn't think about that just because I was looking at brk and on the bravos or gunny they don't refer to it as a sabre grind unless your talking about the gunny hunter.. dk why it appears to be the same thing

 

[FortyTwoBlades]

Height of a grind is merely an artifact of certain angles being imposed on a given stock thickness and blade width. Fun fact: the Becker BK-2 has the same grind angle as the BK-16 despite them having radically different stock thicknesses and blade widths. The BK-16 is a full flat grind while the BK-2 is a saber grind. But they're the same grind angle. The BK-2 is only a saber grind because of the stock being so thick and the blade being so wide.

 

[katanas]

Thank you FortyTwoBlades; I had grinds all figured out....until your post.

 

[FortyTwoBlades]

Basically just think of a piece of bar stock of a given thickness and width and then imagine overlaying that bar stock with angles. Same angle on two different bars results in different visual appearance of the grind despite the grind angle being the same. That's why the numbers matter more than the height of the grind.

However, your stock thickness and width do have a limiting effect on the thinnest angle you can produce on that piece of stock without grinding into (and, as a result, reducing) the spine thickness. Reduce your stock thickness and/or increase your stock width and you can use a lower grind angle than you can with thicker and/or narrower stock. But because spine thickness has a large impact on rigidity (rigidity increases cubically with thickness--a small addition makes a big difference) your desired spine thickness should be taken into account as well when deciding on appropriate dimensions.

 

[katanas]

Gotcha! Mille grazie.