KenH Posted March 13, 2013 Share Posted March 13, 2013 Hello all, I've got my KMG clone running pretty good on the 1hp motor - but that just is a bit on the weak side. I've got a 2hp 3450 RPM motor I'm planning to install. Running the numbers on belt speeds with a 4-step pulley, the normal 4"-3.5"-2.5"-2" size pulley. From my calculations it looks with with that type pulley (belt drive) and a 3" drive wheel, the speeds should be about 1016 FPM, 1443 FPM, 2845 FPM, and 4064 FPM. Do those calculations sound in the ball park? How do those speeds sound? Should I be trying for a different set of speeds? I know a VFD drive would be best, but that's not going to happen due to cost..... not yet anyway<:) Thank ya'll in advance for any guidance and suggestions. Ken H> Quote Link to comment Share on other sites More sharing options...
Steve Sells Posted March 13, 2013 Share Posted March 13, 2013 mostly I run 2,000 to 4,000 myself, my Bader will go to 6,000 with the drives I have, rarely go that fast Quote Link to comment Share on other sites More sharing options...
Rich Hale Posted March 13, 2013 Share Posted March 13, 2013 Both of my grinders are vari speed. Some belt/steel combinations call for speed changes, You will find that out when you start grinding a lot. And to have to change belts to achieve that is a pain. I do not use the two lower speeds you list very often at all. And there are times when I use well above the highest you list. Just hook it up and see how it works for you. Quote Link to comment Share on other sites More sharing options...
KenH Posted March 13, 2013 Author Share Posted March 13, 2013 Thanks for the replies - with the 1hp my slowest speed was around 1000 SFPM that I used for finish grinding and working on wood handles. All this is pretty new to me, and while I've done a LOT of reading/learning - I don't have much "hands on" experience so it's a real learning curve for me. I was surprised when changing the drive wheel only 1/2" changed the SFPM so much - quite a bit! Thanks to the whole group - always been very helpful to me. Ken H> Quote Link to comment Share on other sites More sharing options...
Rich Hale Posted March 13, 2013 Share Posted March 13, 2013 The belts you use are a huge item..Poor/cheap belts will make your grinder feel like it has little power. Good belts make the difference. And I crank the speed up a bit when working wood...That is unless you get to the point of scorching the wood! Quote Link to comment Share on other sites More sharing options...
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