What does coating the blade have to do with the type and quality of edge that's applied to it?
Nothing really, you would just end up removing more coating higher up the blade with a nice higher convex beveled finish.
Does coating a blade prevent it from taking a zero edge (or any other kind of edge, for that matter)?
Depends on how you define "Zero Edge". But, basically no. (However, trying my best to be objective - see *** below).
Jerry posted a pic of a blade with the edge convexed about .25" - .375" in height and called it a "Zero Edge".
There is no reason that you "CAN'T put this type of edge on a coated blade. (BUT, in all fairness - see *** below)
Vic and others have posted MANY pics where they have done so. They just grind away some of the coating while re-profiling.
If stripping the whole blade, I recommend a chemical stripper as it is very fast and easy. Faster and easier than sanding off the entire coating.
You could remove the whole coating with a belt sander. However, depending on how much of the coating you have to remove, you could probably start to clog your sanding belt.
If just removing a little bit of the coating when re-profiling, for most "individuals" this will not be a big factor and the little bit of coating to be removed will sand right off without affecting the belts too much.
I always strip mine prior to doing anything else. So, I don't have any pics of a re-profiled edge on a coated blade.
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I would tend to think of a "Zero Edge" as a full height convex grind - one single grind line from spine to sharp. But.... ????
Anyway, it could still be done.
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Jerry stated:
"It is difficult to put this type of edge on a regularly finished knife since the edge finishing process usually rides up fairly high on the bevel."
I don't know what he is referring to when he said "Regularly finished".
If he were talking about a satin blade, yes it takes a few more minutes to put a decent edge on a knife. But, there is no reason this edge couldn't be provided - I believe it should.
*** If he were talking about a coated blade: I assume (fairly confident) the blades have the primary grind first, then coating, then sharpened.
With this line of procedure, coated blades and with a production quantity of knives, he would gum up a lot of sanding belts with epoxy coating being stripped more than usual - which is a cost factor.
I still wish they would (and believe they could) offer satin finished blades with good edges at just $10 - $20 or so above CG prices instead of way above CG prices. This would save me a lot of time and effort and be (IMO) a more reasonable price difference and ultimately a better knife and make me a much happier customer. (* Sorry if I am being self centered....)
However, this type of higher convexed edge CAN be applied to a CG coated blade. I assume Jerry has his reasons for not doing it. I assume it has to do with taking time to put a nice edge on the blades and/or costing more in sanding belts (???).
I have said before and I will say again: I have seen some improvements on edge quality on some of the recent knives. But, I still feel there has been room for improvement.
The "Competition Edge" does look nicer than any edge I have seen from Busse and would be about as good as I would hope for in edge profile - hopefully it is sharp as well.
There is one other relevant factor in regards to edge bevels, edge grind height and such - that is the thickness of the blade at the bottom of the primary grind.
If the blade at the bottom of the primary grind is significantly thick, you would have to grind the edge pretty high up into the primary grind to get a decent cutting edge bevel.
* I believe Jerry likes the blades to be thicker at the bottom of the primary grind because this make the edge tougher. - Toughness vs. sharp cutting - always a bit of a compromise.
If the blade at the bottom of the primary grind is thinner, you don't have to grind the edge as high up into the primary grind for a decent cutting edge bevel.
The "Convex" edge (can) give you a good compromise and balance of both good cutting and toughness.
The edge shown in this picture should be a very nice balance between cutting ability and toughness for a blade this size <img src="/ubbthreads/images/graemlins/thumbup.gif" alt="" />:
In any event, buyers are probably going to have to choose between:
1) High prices of "LE" blades (overly high IMO)
or
2) "Competition Grade" - UGLY with good edge and ugly finish (frustratingly short of satin to me, but IF reasonably cheaper than Combat Grade - possibly a good option and balance of better edge and price for those who would strip the coatings anyway. - It just still leaves a lot of work for me that I beleive would be easy for a knife maker.
* For the record, Knives with Res-C are much easier to "Fix" than knives with exposed tangs - especially exposed pommels and if the micarta has anything other than a square edge at the ricasso. Many of the Busse knives have complex shaped micarta that is near impossible to get the blades decent looking around the micarta.
or
3) Finishing the Combat Grade knives ourselves (stripping, cleaning, sanding, re-profiling, sharpening, etc. - And still can't get the blades decent looking on many micarta handles!)
or
4) Having CG blades where you only fix the blade edge yourself
or
5) Having CG blades with edges that are less than ideal for quality cutting performance
Unfortunately, we don't know if the "Competition Grade" blades will be less or more than Combat Grade.
Further, we don't know if "Competition Grade" will be offered at all and if so if offered for Scrap Yard and/or Swamp Rat. Since I haven't seen a satin blade from Swamp Rat for a couple of years, I am not real optimistic, but (????).
I am under the impression, I am probably going to end up having to continue doing all the darn stripping, cleaning, sanding, reprofiling and sharpening of Combat Grade blades myself. Can't seem to find a win-win and many blades (especially Swamp Rat) just are not being offered in anything other than Combat Grade. <img src="/ubbthreads/images/graemlins/frown.gif" alt="" />
.