Coote Grinder contact wheel

jakeotter · Oct 12, 2015

Hi Sorry if this is the wrong forum to ask this question. I searched this topic and haven't really found a clear answer.......
I'm planning to buy a new Coote grinder. Will be wired up with 3/4 hp, 1725rpm motor OR a 2hp, 1750rpm motor. Norm Coote advised contact wheel size doesn't matter if not hollow grinding. What's the difference between a 6" and 8" then...? If it doesn't matter I'm confused why they even make both sizes. Thanks

Frank Niro · Oct 12, 2015

What the difference is , is how high up the blade you can grind on how thick of material.If the material is thin the smaller wheel will want to grind deep . I oridginal had a 8" wheel and then got a 10" If my grinder would handle it I believe I would get a 12" or perhaps a 14".
Frank

Bill DeShivs · Oct 12, 2015

Put simply- the wheels are for hollow grinding.

Daniel Rohde · Oct 12, 2015

Also a larger wheel diameter will give you faster speeds per rpm

jakeotter · Oct 12, 2015

Ok gotcha. My typical grinds are convex, scandi, and saber so figured a safe bet would be the 8". Hopefully that will work ok lol

MJV · Oct 12, 2015

Daniel Rohde said:
Also a larger wheel diameter will give you faster speeds per rpm

Only if it is the drive wheel.

jakeotter · Oct 13, 2015

Ok so the larger the contact wheel the faster the potential speed? Also I have access to a 1.5hp Baldor motor but is 3450rpm. Would it be possible to use that?

Daniel Rohde · Oct 13, 2015

MJV said:
Only if it is the drive wheel.

yes, and it is