Anyone ever fix a step pulley with JB Weld

[Mark Gottesman]

I am repairing a drill press that my father made while studying to be an Industrial Arts Teacher.

So, I am trying to keep it "original", so to speak.

Have a 4 step motor pulley that has a chip out of it.

Has anyone ever tried to build up a missing section with JB weld and have it hold up in use?

Be glad for any thoughts or ideas.

Here is a photo of damage.

View image in gallery​

 

[Gotcha6]

I wouldn't trust it because of the centrifugal force. If this is the spindle pulley, you' be swinging 6K+ rpm in high speeds. If it's a cast iron pulley, try getting it brazed & then file it out. If it's pot metal, use it as a paperweight.

 

[CarvedTones]

I do stupid stuff all the time and I wouldn't do that...

Seriously, getting it balanced and being sure it won't come out would be very difficult. Maybe you can cross match the part and find a common use for it to find a replacement that is just like the original.

 

[Mike Davis]

Looks like cast aluminum?

I would find a replacement, I pretty sure that is an off the shelf part.

If it had been a part he machined then I would do everything possible to save it, but a standard part even he would say just buy another.

There's a machine shop in Colfax that I use a lot. I'm sure they can make a great part to fit if you can't find one.

 

[Mark Gottesman]

This is the driver pulley that goes on the motor. It looks like it is cast pot metal, feels too heavy to be aluminium, but I really can't be sure. Has two set screws to hold it to the motor shaft. It also has been drilled to balance it.

 

[Gotcha6]

Go here:
http://tool.wttool.com/search?af=&do=search&do=search&w=pulleys
or try WW Grainger. It isn't worth the risk or trouble.

 

[JackLeg]

If that's an old Craftsman DP, I've got one that's been running for over 25 years with that same type break. Hasn't missed a lick.

 

[CarvedTones]

I thought about mentioning that if it were dead on, or just a few thou off in the right direction, it would not matter much. That's the kind of "stupid" I would do (referencing my earlier post, not trying to apply that label to anyone else ).