Convert V belt to flat belt 1963 10k UMD

[ajroland67]

I'm trying to restore a 1963 10k UMD. It currently has a v belt 4 step pulley. The pulley has marred up gear teeth and needs replacing. I haven't found a suitable replacement and don't want to spend the $400 ebay price for the pulley. My question is can someone offer me advice on converting my lathe to a flat belt set up. The required pulleys seem much more affordable. Would I need to change anything underneath on the motor except the pulley? Any advice on the subject would be appreciated.

thanks,
Tony

 

[stephen thomas]

Pictures?
Mine is the V-belt version, don't know how that relates to gears?

smt

 

[Dobermann]

I don't understand the gear teeth reference. But....think carefully about converting that system since the V-belt drive has much better torque delivery potential than the flat belt system.

 

[ajroland67]

The gear teeth on left of photo have issues. I'm thinking this is all one piece. It appears to be. Unless, I've overlooked something.

 

[BDRetz]

Those teeth don’t look that bad. I would clean them well with a tooth brush sized metal brush. Take any high spots off with a small file or stone.

I think the gear is pressed on to the pulley but I could be wrong. I have a heavy 10 pulley where that gear is brass and for sure pressed on/in.

If you don’t spend much time in back gear it will probably work just fine. Put a 3 phase motor on it with a VFD and you could probably really reduce back gear use by slowing the motor.

Hope this helps.

Ben

 

[ajroland67]

Those teeth don’t look that bad. I would clean them well with a tooth brush sized metal brush. Take any high spots off with a small file or stone.

I think the gear is pressed on to the pulley but I could be wrong. I have a heavy 10 pulley where that gear is brass and for sure pressed on/in.

If you don’t spend much time in back gear it will probably work just fine. Put a 3 phase motor on it with a VFD and you could probably really reduce back gear use by slowing the motor.

Hope this helps.

Ben

Thanks for the advice. I am planning on putting a three phase motor and vfd. I'm going to try it out keeping the v belt set up. Maybe, it will run better than it looks.

 

[SteveM]

The gear is not part of the pulley - the pulley slides on the shaft with a key to drive the shaft.
V-belts will have better grip, so keep the v-belt.
Also, when you drop the speed on your VFD, you are going to lose torque - having the pulleys will let you get that back.

 

[SBLatheman]

The gear teeth on left of photo have issues. I'm thinking this is all one piece. It appears to be. Unless, I've overlooked something.

The gear is a separate part. I have a replacement N.O.S.
Send me an email
Ted
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