Hack to get consistent angles on bench grinder (wheel)?

Motega

Motega

Joined
Jun 20, 2006
Messages
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I have a dozen Paki damascus and tool steel knives that need reprofiling, and I don't hvae the room or money for a bet grinder. Is there any angle guide that I can set to like 15 per side and just grind until I get to the point I am ready to put it on the TSPROF?

These knives aren't half bad for tossing to a friend or neighbor as a little gift, but I won't even give them away with the angles they come with.
These knives are like $15 each and the damascus is actually damascus, the steel is probably around 54 Rockwell.

Talked to a bunch of these resellers and told them how profoundly dumb it is not to just send a grinder to their Paki pals and put correct and consistent angles on them and then sell them for more money. These guys selling on the auction sites don't even know what 1095 or 15N20 or D2 means.

Anyway, I can't find a ready made jig or laser level to work on a bench grinder, wondering if anyone figured this one out.
 
Tormek makes hardware to do this, but it costs more than a cheap belt grinder.
 
Hi,
Do it the easy way, good enough freehand ;)
paint the entire blade with magic marker
then grind BEHIND the edge/apex
reapply magic marker often in case of stray strokes
when painted edge/apex shrinks to below 1mm (0.3 mm)
switch over to TSPROF


Any questions?
 
Motega said:
I have a dozen Paki damascus and tool steel knives that need reprofiling, and I don't hvae the room or money for a bet grinder. Is there any angle guide that I can set to like 15 per side and just grind until I get to the point I am ready to put it on the TSPROF?

These knives aren't half bad for tossing to a friend or neighbor as a little gift, but I won't even give them away with the angles they come with.
These knives are like $15 each and the damascus is actually damascus, the steel is probably around 54 Rockwell.

Talked to a bunch of these resellers and told them how profoundly dumb it is not to just send a grinder to their Paki pals and put correct and consistent angles on them and then sell them for more money. These guys selling on the auction sites don't even know what 1095 or 15N20 or D2 means.

Anyway, I can't find a ready made jig or laser level to work on a bench grinder, wondering if anyone figured this one out.
Click to expand...

Maybe?

Laser Guided Paper Wheel Sharpening

Also described HERE

You can also do this... (start around 37 sec.)...

 
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The angle trick with the laser, or the markings on the side of the wheel seems like the least expensive, yet relatively accurate method. The laser level trick really is brilliant! I haven't used it myself, but it seems like a great idea.

Motega said:
Talked to a bunch of these resellers and told them how profoundly dumb it is not to just send a grinder to their Paki pals and put correct and consistent angles on them and then sell them for more money.
Click to expand...

The majority of Pakistan made knives that I have touched won't take any real edge. They come with these giant edge angles (25, 30 or more degrees per side) because the steel is so soft they really won't support anything else. Granted, I haven't touched one of these blades in more than 10 years. Things might have changed. It's also possible I'm just wrong.

You might try doing one knife with a 15 dps angle and see how it goes. I hope you have positive results.

Brian.
 
Thanks guys. These are so tempting because they are cheap. I tell friends to be careful, not to do foolish things like batoning wood, but for the price of buying your friend a couple beers, they make a nice little extra "thank you" if you get an invite to spend a few nights at someone's camp, and are good chore knives around camp. I had a few guys tell me they've used them to open cans, cut cordage, field dress a deer. For what it's worth they are "real" damascus and I have a big kitchen blade that is great for melons because it's heavy.
I am curious about consistency over the years and contacted the knife nerds about if they do testing and what they would charge to test the composition and hardness with a set of 5 knives going back 6-7 years in 1 year increments. It's really just out of curiosity.
 
I'm slow on the uptake... I "get" how it works but don't see how to set it up yet. I just got a cross level to install a drop ceiling, I wonder if that would help? I have a laser level, grinder, paper wheels (mostly from traditional archery 2 blade broadhead sharpening), grit glue, etc. so I really should be able to make this work.
If anyone finds a step by step how to and video post it for me , would ya?

Thanks!
 
Does this help?

on an 8inch wheel,
you could hold knife at 15dps to the floor at the TOP of the wheel (0degree)
or hold it horizontal at the 15 degree mark
the mark could be laser projection
or it could be a piece of cardboard or ...
around 5 degree mark for primary grind
around 10 degree mark for relief/edge bevels ...
eyeballs is close enough
qCuws1d.png

update: hmm, this might be a 16inch wheel image, heh
circumference
2*pi*8in = 0.13962634 * 360in
0.13962634 = 0.6981317 /5
2*pi*8in = 3.546509 * 360*mm

pi*8in = 1.7732545 * 360*mm

from that already linked posts bladeforums.com/threads/laser-guided-paper-wheel-sharpening.694800/page-2#post-11998766
P1000021-vi.jpg

P1000020-vi.jpg
 
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