M.B. Naegle
Diamond
- Joined
- Feb 7, 2011
- Location
- Conroe, TX USA
I picked up a "free" surface grinder a few weeks ago. I was buying a different machine and the guy had a pile of parts that was going to go to the scrap yard. It looked like it was all there, so I decided to take a stab at it.
It's an old Delta Milwaukee surface grinder. I don't think it's the "Toolmaker" version as it doesn't have any of the table taper features or tooling. Once I got it all sorted out, I found it was missing some simple stuff, but otherwise could be a functional grinder again. I decided to take it on mainly as practice scraping. The ways aren't too bad, but they're all simple flat ways so it's going quickly.
So my questions are about the motor/spindle set-up. It was missing the OEM motor and pulleys. I have another 1/2 HP sealed frame 110v Delta/Rockwell motor that would fit nicely with the machine, but I've also read that the spindle and motor need to be dynamically balanced. Is that something only the pro's can do or where would I start?
I was able to find an OEM spindle pulley (2 speed), but am still missing the motor pulley. Short term, I'm thinking I'll use a single groove pulley and pick a speed, but to replace the 2 speed motor pulley, I think I'll need to make one. Can someone measure the diameters of the steps for me? Otherwise I can do some math and figure approximate diameters, but the original dimensions would help.
I'm thinking about putting it together with what I have and taking some test cuts. If I get a lot of chatter, then I'll know that it needs balancing.
As a side note: I'm fairly certain this machine was a Hurricane Harvey victim. Random places have been full of water, but 90% of the machine is rust free thanks to it not being kept very clean of grease and grime. The other 10% of exposed surfaces were heavily pitted. This included some areas of the spindle, but thankfully all of the bearing seats and the front taper bearing are damage free. But perhaps the pitting will have a play in how balanced the spindle is now.
It's an old Delta Milwaukee surface grinder. I don't think it's the "Toolmaker" version as it doesn't have any of the table taper features or tooling. Once I got it all sorted out, I found it was missing some simple stuff, but otherwise could be a functional grinder again. I decided to take it on mainly as practice scraping. The ways aren't too bad, but they're all simple flat ways so it's going quickly.
So my questions are about the motor/spindle set-up. It was missing the OEM motor and pulleys. I have another 1/2 HP sealed frame 110v Delta/Rockwell motor that would fit nicely with the machine, but I've also read that the spindle and motor need to be dynamically balanced. Is that something only the pro's can do or where would I start?
I was able to find an OEM spindle pulley (2 speed), but am still missing the motor pulley. Short term, I'm thinking I'll use a single groove pulley and pick a speed, but to replace the 2 speed motor pulley, I think I'll need to make one. Can someone measure the diameters of the steps for me? Otherwise I can do some math and figure approximate diameters, but the original dimensions would help.
I'm thinking about putting it together with what I have and taking some test cuts. If I get a lot of chatter, then I'll know that it needs balancing.
As a side note: I'm fairly certain this machine was a Hurricane Harvey victim. Random places have been full of water, but 90% of the machine is rust free thanks to it not being kept very clean of grease and grime. The other 10% of exposed surfaces were heavily pitted. This included some areas of the spindle, but thankfully all of the bearing seats and the front taper bearing are damage free. But perhaps the pitting will have a play in how balanced the spindle is now.