jspake
Well-Known Member
hi guys, its been quite a week.
i've been running a KMG grinder for the past 3 years or so and liking it very much. for a few different reasons, bench space being a big one, i've decided to convert it into a direct drive machine. conceptually its not that complicated, but i have fit a few bumps. one i need some help with. the first thing i noticed was that my drive wheel had a 3/4 ID for the shaft, and my motor has a 5/8 shaft. obviously the pulley system made that fine. so i bought a drive wheel with a 5/8 ID only to find that the shaft for the motor isn't quite long enough to get the drive wheel far enough away (to the right of the motor) to align properly with the idler wheel and tool arms... frustrating. i really only need it to be about an inch longer.
my question... is there a way that i can extend the motor shaft about an inch or so? i've thought of making some sort of dummy plug with a keyway slot milled that can just fill in the space inside the drive wheel so that the key can be tightened down and secure to the motor shaft and the plug equally... would that be safe? the other thought i had would be to make some soft of a bushing or collar to go around the 5/8 shaft and fit into the original 3/4 ID drive wheel. this seems like probably a worse idea. what do you think?
i've been running a KMG grinder for the past 3 years or so and liking it very much. for a few different reasons, bench space being a big one, i've decided to convert it into a direct drive machine. conceptually its not that complicated, but i have fit a few bumps. one i need some help with. the first thing i noticed was that my drive wheel had a 3/4 ID for the shaft, and my motor has a 5/8 shaft. obviously the pulley system made that fine. so i bought a drive wheel with a 5/8 ID only to find that the shaft for the motor isn't quite long enough to get the drive wheel far enough away (to the right of the motor) to align properly with the idler wheel and tool arms... frustrating. i really only need it to be about an inch longer.
my question... is there a way that i can extend the motor shaft about an inch or so? i've thought of making some sort of dummy plug with a keyway slot milled that can just fill in the space inside the drive wheel so that the key can be tightened down and secure to the motor shaft and the plug equally... would that be safe? the other thought i had would be to make some soft of a bushing or collar to go around the 5/8 shaft and fit into the original 3/4 ID drive wheel. this seems like probably a worse idea. what do you think?