- Joined
- Dec 3, 2020
- Messages
- 183
Hi, nothing new here folks, just another RF-30 sufferer upgrading the motor to 3-phase. OK, it's an Enco clone, not Rong Fu brand, is this still the right sub-forum?
The motor I got is a fairly awesome "Extreme Duty" Baldor, $50 locally, used but in good shape. I'm pleased except for how heavy it is. Does even the fan shroud have to be thick cast iron? Jeez. Seems like a great motor otherwise and it looks like the dimensions will match up well enough, except for the shaft diameter.
Anyway my question is, has anyone put the motor v-belt pulley (sheave?) on a 7/8" shaft? I don't even know what the original motor shaft diameter is, can't measure without taking it off and I'm not ready to be without a mill yet. I assume it's smaller though.
I have a lathe, so I can bore the pulley to .875", assuming there's enough "meat" there in the pulley, around the bore.
I'd also be OK with buying a new multi-step pulley, if that's something I'm likely to find. I don't need the four diameters to match exactly, a bit bigger or smaller would be OK even if it means getting a different belt length. The speed range on the VFD I'm using will more than cover any discrepancy in sizes, between the original and replacement pulleys. I actually like the idea of leaving the existing pulley on the original motor, so I can swap it back in if this new motor lets its smoke out. Even another RF-30 (or similar) pulley, that would need to be bored out, would be awesome. Anyone parting out a dead mill-drill?
Grateful for any advice from people who've made this kind of swap.
Thanks
Mark B in Seattle
The motor I got is a fairly awesome "Extreme Duty" Baldor, $50 locally, used but in good shape. I'm pleased except for how heavy it is. Does even the fan shroud have to be thick cast iron? Jeez. Seems like a great motor otherwise and it looks like the dimensions will match up well enough, except for the shaft diameter.
Anyway my question is, has anyone put the motor v-belt pulley (sheave?) on a 7/8" shaft? I don't even know what the original motor shaft diameter is, can't measure without taking it off and I'm not ready to be without a mill yet. I assume it's smaller though.
I have a lathe, so I can bore the pulley to .875", assuming there's enough "meat" there in the pulley, around the bore.
I'd also be OK with buying a new multi-step pulley, if that's something I'm likely to find. I don't need the four diameters to match exactly, a bit bigger or smaller would be OK even if it means getting a different belt length. The speed range on the VFD I'm using will more than cover any discrepancy in sizes, between the original and replacement pulleys. I actually like the idea of leaving the existing pulley on the original motor, so I can swap it back in if this new motor lets its smoke out. Even another RF-30 (or similar) pulley, that would need to be bored out, would be awesome. Anyone parting out a dead mill-drill?
Grateful for any advice from people who've made this kind of swap.
Thanks
Mark B in Seattle
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