Post 86 103 Grind

[hughd]

How does the post 86 103 blade grind differ from the pre 86 and Edge 2000?

 

[David Martin]

The 2 have big differences. First the post 86 knife will have 2 black spacers. One in the guard and one in the rear pommel. The hollow
grind will be much thinner than the earlier 103's. I think by 1990 Buck was doing an edge 2000 and they didn't start calling it that
until 1999.
The earlier knives used 4 maroon micarta spacers, 2 in the guard and 2 in the pommel. Then the hollow grind was really a semi-hollow
grind with thick metal behind the edge. DM

 

[David Martin]

Plus, Buck changed the steel from 440C to 425M in 1982. Some later with the 103 (fixed blades). DM

 

[hughd]

I think by 1990 Buck was doing an edge 2000 and they didn't start calling it that
until 1999.

Thanks for the information DM. The fact that my 1995 grind matched my 2014 E2000 had me scratching my head...

 

[DeSotoSky]

Edge 2000 was just marketing hype for when they changed their standard included angle of the edges and has nothing to do with the general grind of the blade. Edge 2000 was a change to a thinner sharpened edge with an included angle between 26 and 32 degrees. Prior to that Buck's standard edge angle was between 35 and 50 degrees. The change was announced in the 1999 catalog.

Not sure where you were going with the pre/post 86 question. 1986 significance was that it was the year date codes started and not related to any changes in fixed blade knives. 425m was the standard steel used from about 81/82 until 1992 after which 420HC was used.

 

[hughd]

Edge 2000 was a change to a sharper, thinner edge with an included angle between 26 and 32 degrees. Prior to that Buck's standard edge angle was between 35 and 50 degrees.

You are talking secondary bevel? Correct?

 

[DeSotoSky]

Blade terminology is a mish mash. Probably less confusing to talk about blade grinds and edge bevels. When you say "secondary bevel" are you referencing the hollow grind of the blade as the primary bevel? (as opposed to a 2 bevel edge). I think of Buck knives as having a single bevel edge. Was your original question about differences in the hollow grind of the blade or the bevel of the sharpened edge? To me Edge 2000 was more about the edge bevel than the overall blade grind. Having said that, was there a slight change in the hollow grind to accomodate the thinner included edge angle, I'm not sure but don't think it would be obvious without measuring. I think David Martin needs to wade in again on this because I clearly did not know when I was finished.

 

[hughd]

Not sure where you were going with the pre/post 86 question

I should have said: How does the post 86 (1995) blade grind/edge bevel differ from my 2014 Edge 2000?

Blade terminology is a mish mash. Probably less confusing to talk about blade grinds and edge bevels.

You can say that again. I think I have it figured out: My 1995 with hollow ground blade is the same bade grind/edge bevel as my 2014 E2000.

 

[David Martin]

It's not much more than thinning out the grind on the blade face to improve performance. ( taking the flats higher) Which many will label this as the second bevel.
Then the first bevel, i.e. the edge. When this bevel is thinner and the shoulders softened / some ground off, this greatly improves performance. Custom knife makers were doing this in the 70's. (Bob Loveless) But it was slow to catch on in production knives.?? DM

 

[hughd]

It's not much more than thinning out the grind on the blade face to improve performance. ( taking the flats higher) Which many will label this as the second bevel.
Then the first bevel, i.e. the edge. When this bevel is thinner and the shoulders softened / some ground off, this greatly improves performance. Custom knife makers were doing this in the 70's. (Bob Loveless) But it was slow to catch on in production knives.?? DM

Thanks DM, do you happen to have an image/drawing of this?

 

[David Martin]

Here is a drawing, labeling the knife parts. DM

 

[David Martin]

The edge is the first bevel. It's the shoulder of this area that needs thinning.
The hollow grind is the 2nd bevel (a poor term). This needs to be thinner and taken higher in the flats.
The flats are between the grind line and the spine. DM

 

[hughd]

The edge is the first bevel. It's the shoulder of this area that needs thinning.
The hollow grind is the 2nd bevel (a poor term). This needs to be thinner and taken higher in the flats.
The flats are between the grind line and the spine. DM

Thank you DM! That cleared it up for me.