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03-29-2013, 02:25 AM #11Junior Member
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The Grizzly is ok but is really fast, not great for knife blades but even worse for razors. The Coote can use step pulleys or variable speed motor setup and will work out much better, of those two, in my opinion.
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04-01-2013, 01:20 AM #12Senior Member
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The Griz probably won't satisfy anyone working on razors - only one size contact wheel, and no variable speed, even with pulleys. All I know about the coote is in the above post. I'd want to know how it worked for a razor maker before I bought one. I have a KMG with a variable speed set up and have never regretted the money spent. I strongly feel this is a case where you get the very best you can possibly afford --- the first time.
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04-01-2013, 09:54 PM #13Senior Member
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Thanks for the advise guys. I decided to build a 2 x 72" grinder.
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04-01-2013, 10:06 PM #14Senior Member
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The No weld grinder from Tracy at USA Knifemakers looks like a good DIY grinder, and he has lots of extras available for it. I have bought contact wheels from him.
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04-01-2013, 11:07 PM #15Senior Member
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Going to make something on this order. Simple and useful...
2" by 72" Homemade Belt Grinder - YouTube
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04-02-2013, 06:33 AM
#16
Where the variable speed truly shines is with high grit belts in the finishing post-HT stage.
If you're hogging out blade blanks with a 40 grit belt, single speed is fine.
But high grit belts can produce an immense amount of heat in less time than it takes to blink. Post-HT, a single speed grinder would stand a very good chance of ruining the temper, not to mention blistering your fingers.
Til shade is gone, til water is gone, Into the shadow with teeth bared, screaming defiance with the last breath.
To spit in Sightblinder’s eye on the Last Day
04-02-2013, 11:13 AM
#17
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I'm going to put a step pulley system on when I build mine. It won't be exactly like in the video.
04-02-2013, 04:36 PM
#18
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If you run a pair of 4 step pulleys, you can get almost as good variable speed as a variable speed motor. I really like the compression spring tension system on that grinder. Make sure you understand how the tracking adjustment works - you have to have that. It looks like a well thought out machine. You can get contact wheels cheaper from USA Knifemakers Supply than Bader. Good luck, and keep us informed on your progress.
04-04-2013, 12:23 AM
#19
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Thank you. I came up with a different design. Ordered the steel today. Already have the 4 step pulley's waiting. Will be putting on a 2hp 1725 rpm motor and an 8 or 10 inch contact wheel. Going to order the wheels I need from USAKnifemarkers.
