Consistent primary grinds

Troy H

Troy H

I'm always like this.
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Jan 28, 2005
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I understand that the primary method will be "practice", but are there other aids that can be used to improve grind consistency? Are there jigs to help with this?

Thanks
 
Yep, practice. Some guys recommend getting some paint stirring sticks and using them to practice grinding. Never tried it myself.
 
Honestly the best thing I ever done was reverse the direction of my belt. So it flys up. And then use 2 pieces of steel on each side of the wheel as guides so that when you grind , (you grind edge up with this set up...)the traction bites and pulls the edge up into the guides and you just hold it steady and drag it off the side. you get very consistant grinds with this method. As well as being able to see your edge scribe.

Here's a pic of my guides.
4841_116206890241_625615241_2854929_3535001_n.jpg


Jason

PS ignore the mess in the background, I'm workin on reorganizing the shop...
 
Great suggestions! I've put my name on the list to buy a bubble jig and I can definitely see the advantage of your setup, Jason. I also found a few great tool rest setups here that look very helpful. :thumbup:

Any other methods? How do the manufacturers do it?

Thanks again for the input. :cool:
 
Are you hollow or flat grinding? If you're hollow grinding I think it's easier to remain consistent, you just have to take one hard pass to set the hollow and then slowly put the blade back on the same grind until you get it where you want it. Flat grinding, for me, is much more of a chore and all about "feeling" the knife... and hand sanding :D

There are/were several old school maker's who did all of the grinding for lines of production knives. Most of them could grind them freehand or had a straight pattern that could be ground on a rest or with a jig.
 
JasonSCarter said:
Honestly the best thing I ever done was reverse the direction of my belt. So it flys up. And then use 2 pieces of steel on each side of the wheel as guides so that when you grind , (you grind edge up with this set up...)the traction bites and pulls the edge up into the guides and you just hold it steady and drag it off the side. you get very consistant grinds with this method. As well as being able to see your edge scribe.

Here's a pic of my guides.
4841_116206890241_625615241_2854929_3535001_n.jpg


Jason

PS ignore the mess in the background, I'm workin on reorganizing the shop...
Click to expand...

What a neat idea is it possible to reverse any grinder?
 
swilliamf said:
What a neat idea is it possible to reverse any grinder?
Click to expand...

Almost any electric motor can be made to run in reverse, by switching the leads on the inside if you open the back side of your motor, or where ever your cord inlet is, you'll see a wiring diagram, and that's where usually it will tell you how to reverse it. :D:thumbup:

Jason
 
There are standard induction AC motors and reversible AC motors, not all are created equal. The same concept holds true for DC motors, there are reversible polarity motors and non-reversible motors, these generally have four leads. Universal motors are also entirely different. Three phase motors, however, are all reversible, to the best of my knowledge. Best to check the specifications on the motor you have.
 
I should have written more clearly that reversible DC motors have four leads. Hopefully it was helpful.
 
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