How To Convex to v grind

C

Casey D

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Dec 14, 2018
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Hello all, long time stalker but first post ever. I just got the EP Alex 4 and need some advice. Ibe used a 1x30 belt sander (with great results) for about 5 years. The belts sander without the back piece naturally puts a convex edge on everything so, literally everything I own has a convex edge. My big blades I'm leaving convex but my pocket knives and edc fixed blades I was going to sharpen with the EP. Any tips on going from convex to v? Will i have to reprofile all my blades. I've only had it for a few days and I'm getting good results on the cheap knives with factory grinds but haven't tackled my good knives yet that I've put a convex edge on. Thank you for your time.
 
yup - pick your angle - use your sharpie - and make sure you get to the apex.

its not so much a reprofiling as it is knocking off the convex
 
Casey D said:
Hello all, long time stalker but first post ever. I just got the EP Alex 4 and need some advice. Ibe used a 1x30 belt sander (with great results) for about 5 years. The belts sander without the back piece naturally puts a convex edge on everything so, literally everything I own has a convex edge. My big blades I'm leaving convex but my pocket knives and edc fixed blades I was going to sharpen with the EP. Any tips on going from convex to v? Will i have to reprofile all my blades. I've only had it for a few days and I'm getting good results on the cheap knives with factory grinds but haven't tackled my good knives yet that I've put a convex edge on. Thank you for your time.
Click to expand...

Well, a change from a convex profile to a flat grind profile, is by definition a reprofile. ;)

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(Stolen Image, sorry don't remember where).

How much work it is, depends on what angle it's currently at, how "curved" the convex is, and what angle you want to sharpen it at. But, as others have said it's probably not too difficult.

One thing to be aware of, if you're going from a higher angle and/or a really curved convex profile to a flat grind, it may take a bit to reach the very edge...so make sure, if you mark it with a Sharpie type marker, that all the marker is removed, to the very edge. Easiest way to insure you've reached the edge is create a burr along the entire length. (Basically expanding on what l1ranger said).

All in all, shouldn't be a difficult venture, especially since you have some practice under your belt. (You could put a convex edge on one of your cheap practice knives, and then reprofile it to get an idea). Have fun!
 
Just pick an edge angle and go from there. Chances are you'll end up just hitting the apex of the edge and the region immediately behind it, leaving a visible convex behind the new V-bevel. Which is fine. No need to get any more complicated.
 
Thanks for your help, another question? I have one blade that I cant for the life of me get the same result as the others (candiru) is it possible I've taken the bevel too far up the blade into the thicker part and that's why I cant seem to get an edge? Other daily use pocket knives I seem to do okay with. By okay meaning I'm still learning and it's going in the right direction
 
What is the grit of your stone? This project should be started with a coarse stone, 100-120 grit SiC. Grind one side until you've removed enough metal, then flip it over. Starting with a 300 grit stone will take a long time. DM
 
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