Here's that double grinder again

Exactly.The Jantz manager...I forget his name,told me thats how he grinds.That was about 10 years ago..2 KMG's i believe is exactly what he did.
woodwrkr221 said:
Am I missing something here? Is there any reason why a maker who has two GIB's or KMG's can't just turn the two grinders face to face and synchronize the speeds?
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Hmmm.... I think if I had $4000, I'd just buy two fully decked variable speed KMGs and put them end to end against eachother.

Heck... You could just about buy a CNC milling machine for that. hahah

That $450 dollar hollow grinding jig that Jantz sells is starting to look more reasonable now, considering I could buy it AND a high end grinder and still be money ahead. ;)

Don't get me wrong... I'm all for innovations and saving time in the shop, but things like this really start to blur the lines between a quality handmade knife and something I can buy off the shelf at walmart. I'm not saying there's anything wrong with using this machine, but theres usually a point when you start trading quality for speed and quantity.
 
It's not as simple as 2 fixed grinders
If you are hollow grinding

a 60 grit belt will have a larger effective diameter than a 400 grit belt on the same wheel because of the grit size.

On one of the videos - it shows the fellow hollow grinding a razor & he has a lever that brings the two wheels together.
It's a dedicated machine to that operation


On a flat grind, it would not matter so much, as you can just go further in or out of the wedge.




If you keep up theis talking about it, I'm going to have to build one.
 
There is a photo of a similar rig in a 70's or 80's knife publication. I believe I remember it being captoned as being used by Buck Knives. It is not a new concept.
 
12345678910 said:
On one of the videos - it shows the fellow hollow grinding a razor & he has a lever that brings the two wheels together.

If you keep up theis talking about it, I'm going to have to build one.
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I'm assuming you would need to carefully adjust (and re-adjust) the space between the two belts? What sort of mechanism would be good for adjusting the space between the belts?

Keep talking, keep talking!:D
 
This could be built for under 1000$, get two grizzly knifemaker grinders put them wheel to wheel. Add a little bit of a traveling table to one machine to adjust the distance between each wheel, could be as simple as a setscrew.
 
12345678910 said:
It's not as simple as 2 fixed grinders
If you are hollow grinding

a 60 grit belt will have a larger effective diameter than a 400 grit belt on the same wheel because of the grit size.

On one of the videos - it shows the fellow hollow grinding a razor & he has a lever that brings the two wheels together.
It's a dedicated machine to that operation


On a flat grind, it would not matter so much, as you can just go further in or out of the wedge.




If you keep up theis talking about it, I'm going to have to build one.
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It matter on a flat grind too, the thickness of the different grits, atleast on the jig we (Robert Eggerling and I) used to make these:

389530_2799861286644_1561909122_2838450_860267509_n.jpg



Are you sure that was not a lever to raise the blade into the wheels Count? Most of these grinders I have seen I saw a knob to set the wheel distance, then a lever to put pressure on the blade into the wheels.
 
The 1970s double grinder was used by Rigid Knives.
I may have to build one of these things. With 2 Grizzlys the cost could be low enough to make it a dedicated machine.
 
Sam Salvati said:
Are you sure that was not a lever to raise the blade into the wheels Count?
Most of these grinders I have seen I saw a knob to set the wheel distance, then a lever to put pressure on the blade into the wheels.
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I'm thinking of -
It was one of the razor videos you posted, where the grinder had his own separate building.

The wheels moved in and out.

I can't find which video right now.
 
Yeah that was the one I was thinking of too, he adjusted it with a knob then the lever moved the blade up and down. Let me see if I can find it.
 
It would help if the guy would have proper grammar and not tell fish stories... custom knife in 10 minutes? More like rough blade profile in 10 minutes.

Kaleb
 
He's um, rather proud of his work, don't you think?
And, 30 bucks for sharpening??
 
It means his marketing and promotions department is quite enthusiastic.The $1000.00 training session is the killer.I mean,if you built these to sell,and someone actually was willing to put (was it 4K?)in your hand,what kind of nerve does it take to tell the man to come back tomorrow morning with 1000 bucks and ill show you how to run this bad boy!
12345678910 said:
What do you suppose this title means, who gives it out and where can I compete?

"With his technique he has won the Title of World Champion Knife Sharpener for 20 years in a row "
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