Does anyone know where I could find a bench grinder mandrel. I’m not talking about the cheesy light weight ones available in some of the tool catalogs. These are heavy duty, with a type of weighted flywheel in the center. I have one now, it holds an 8″ wheel at each end and the motor, which is separate, is mounted behind it on the bench – but the bearings are going. It’s got to be 40 years old. I’ve searched online and can’t find anything that comes close. Anyone have any ideas?
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Replies
Dave, If the bearings are bronze sleeves, you might try 'rebushing' the old one and enjoy another 40 years keeping your nose to the grindstone. OR, if ballbearings
Clean and read the numbers on the race. Probably easy to order from Mc Master- Carr.
OR, if it's mounted on two 'pillow blocks', They can be bought as well.
I had a similiar set up on my old work bench, only I mounted the motor UNDER the bench to save room. Stein.
Should be an Allied Bearing place somewhere clsoe by. I think they are nation wide. If you can't find numbers on the old bearings then any bearing retailer can match up using a micrometer.
Or, do as I did on my old Sears band saw. I pulled the bearings then carefully removed the grease seal. After soaking in acetone overnight, i finished cleaning them with paint thinner. I then repacked with new grease, reinserted the seal and wound up with essentially new bearings. All of the balls inside were still in good condition. The old grease had basically turned to concrete. Now the lower wheel will freewheel for what seems like several minutes. Beforehand the wheel wouldn't turn 1 revolution when spun by hand.
You might need to get a bearing puller to get them out. I pressed mine back in using two large cast iron C clamps and a block of wood.
PlaneWood by Mike_in_Katy (maker of fine sawdust!)
PlaneWood
Great post! I've done the bearing seal removal, clean and re-lube evolution on the bearing guides for my BS several times over the years. They get dry and contaminated with fine dust.
Regards,
Mack
I do the purchasing of tools for a living and I can't recall seeing anything like what you described available nowadays. Also using online as an exclusive way to search is still limiting. I use online and trade journals to research things. It'd be easy enough to just build that but with the prices for tools from Grizzly and the imports I'd just buy something from them and be done with it.
Thanks for everybody's input. I bought new roller bearings for it a year ago, and replaced them, but the shaft seems to be worn and is starting to get a little vibration. My first thought was it would probably be cheaper to replace it than to have a machine shop fill it in and re-turn it on a lath where it's worn. Apparently these are not made anymore. I really like it because with the stepped pulley on the motor you can vary the speed of wheels.
Thanks Dave
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