I just rebuilt my Atlas QC54 and one thing that I found is that the precision bearings that came with the original lathe, and are very expensive (new) from Clausing, have a lip on the races that seats in the headstock bore. I couldn't see if yours had the lip. If they didn't they may be Timkin aftermarket bearings. Also the inner races should be very tight to the spindle, yours seem to be much looser than the one's in my lathe. I had to make a tool to press the bearing off the spindle nearest the headstock. Later on, I just use a block of wood and just tapped the spindle into the headstock past the outer races, until the inner bearings were seated. Nice job though!
My issue I'm trying to figure out is why does pulling the pin to use the back gear do absolutely nothing to free up the belt pulleys. I've got an old Atlas 618...
Do you mean to loosen them, Like if you want to change the ratio or they won't turn it all? If they're not turning at all and the pin is pulled, something is frozen. It is possible that the pulley cone is frozen to the shaft. It should rotate freely with the pin pulled.
I really did not enjoy disassembling or reassembling the headstock on my lathe. It's a three-handed operation to get the spindle back in and you're trying not to booger anything up.
I just rebuilt my Atlas QC54 and one thing that I found is that the precision bearings that came with the original lathe, and are very expensive (new) from Clausing, have a lip on the races that seats in the headstock bore. I couldn't see if yours had the lip. If they didn't they may be Timkin aftermarket bearings. Also the inner races should be very tight to the spindle, yours seem to be much looser than the one's in my lathe. I had to make a tool to press the bearing off the spindle nearest the headstock. Later on, I just use a block of wood and just tapped the spindle into the headstock past the outer races, until the inner bearings were seated. Nice job though!
Thank you for the advice. This lathe has original Timkin bearings and they do not have the lip that you're referring to.
@@MakeStuffNation Could someone have replaced the bearings before?
GREAT!! I will be rewatching much slower as I start rebuilding my cabinet driven 3991. Can you post the types of paints you use and your method?
I used Rust-Oleum self-etching primer followed by smoke gray Rust-Oleum and then Rust-Oleum clear coat.
My issue I'm trying to figure out is why does pulling the pin to use the back gear do absolutely nothing to free up the belt pulleys. I've got an old Atlas 618...
Do you mean to loosen them, Like if you want to change the ratio or they won't turn it all? If they're not turning at all and the pin is pulled, something is frozen. It is possible that the pulley cone is frozen to the shaft. It should rotate freely with the pin pulled.
It seems like the belt would need to be installed on the pully cone before assembly. I must be missing something.
You are correct if you are using standard belts but I use link belts. They run quieter and are easily replaced without disassembling anything.
Where did you order your baring's at?
McMaster-Carr
Could use a lot more commentary. Post-filming over voicing or subtitles. Also would be good to know where to get the assembly drawings.
Thanks for supporting the channel. You can find the manuals and drawings at vintagemachinery.org/
1st
Thanks for your support!
I really did not enjoy disassembling or reassembling the headstock on my lathe. It's a three-handed operation to get the spindle back in and you're trying not to booger anything up.
It is a difficult job. Thanks for supporting the channel!