- Joined
- Oct 27, 2010
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Ok everyone, I know I have another thread with a disc grinder project going, but I have been thinking of another disc grinder project entirely. To keep the pertinent information to each project seperate I thought two posts were in order. Mods, please forgive me if I am wrong, I can combine these into one if needed.
I have a 1hp 3450rpm 1ph reversible Dayton motor. I was thinking of making a dedicated work table and running a jack shaft to reduce the effective motor rpm. If I use 2" to 5" that would give me an effective motor rpm of ~1380rpm, (2/5)3450=1380, which if I use a 2/2.5/3.5/4 pulleys I would be running rpm of 690/986/1932/2760. Would these rpm's and range be suitable to all aspects of grinding a blade? Or if I went with a 2" to 4" giving 1725 effective motor rpm, using the same four step I would then get rpm of 863/1232/2415/3450. For some reason I think the slower rpm's would be better, but I don't know.
The basic setup would be a stand to hold the spindle and top step pulley, mounted to the table top. Then the jack shaft would be mounted directly below on the underside of the table top with the belt running through a hole in the table. It will be mounted in two pillow blocks on a bracket that slides transversely to adjust belt tension and the reducing pulley will be mounted on the opposite end. One more belt will go from motor to jack shaft. Motor will be mounted on a side hinge to use its own weight to tension drive belt, while allowing movement for tensioning rpm adjusting belt.
Does this sound like a better setup than the wood lathe conversion? The simplicity of building a disc grinder over a 2x72 grinder is why I am going this route. Plus I don't need to buy any new abrasives, I just order more full sheet sandpaper and get a can of Super 77 to mount it.
Your thoughts would be greatly appreciated
-Xander
I have a 1hp 3450rpm 1ph reversible Dayton motor. I was thinking of making a dedicated work table and running a jack shaft to reduce the effective motor rpm. If I use 2" to 5" that would give me an effective motor rpm of ~1380rpm, (2/5)3450=1380, which if I use a 2/2.5/3.5/4 pulleys I would be running rpm of 690/986/1932/2760. Would these rpm's and range be suitable to all aspects of grinding a blade? Or if I went with a 2" to 4" giving 1725 effective motor rpm, using the same four step I would then get rpm of 863/1232/2415/3450. For some reason I think the slower rpm's would be better, but I don't know.
The basic setup would be a stand to hold the spindle and top step pulley, mounted to the table top. Then the jack shaft would be mounted directly below on the underside of the table top with the belt running through a hole in the table. It will be mounted in two pillow blocks on a bracket that slides transversely to adjust belt tension and the reducing pulley will be mounted on the opposite end. One more belt will go from motor to jack shaft. Motor will be mounted on a side hinge to use its own weight to tension drive belt, while allowing movement for tensioning rpm adjusting belt.
Does this sound like a better setup than the wood lathe conversion? The simplicity of building a disc grinder over a 2x72 grinder is why I am going this route. Plus I don't need to buy any new abrasives, I just order more full sheet sandpaper and get a can of Super 77 to mount it.
Your thoughts would be greatly appreciated
-Xander
