Recent content by Emery

no just my spindle pulley is small. my motor pulley is stock sizing 5-4-3-2 (The spindle is 4 1/4-3-2-1 “ish”)

Something seems off to me. With a 27 inch belt my motor just touches the worksurface surface. If I had a 30 inch belt it would be way too big. One of my pulleys is roughly an inch small but it shouldn’t make that much of a difference.

@YotaBota what length is your V belt going from your motor to your spindle? @YYCHobbyMachinist you said your was 30 right? I think mine is to long.... but it’s a 27”

It does have a spring tensioner but that applies more tension to the belt. I took it all the way off and it did not fix the problem. I would need a spring lifting up on the motor. I don’t think a block is the answer because each pulley requires a slightly different belt length. It ranges about...

That’s exactly what I was thinking. I just took a half inch piece of wood and stuck it under the motor and the vibration goes away. The problem is when I switch gears too much slack get in the pulley... So either need to get a lighter motor or figure out some type of I turnbuckle. It needs to be...

Belt looks to be in good condition. No cracks. Vibration is minor. But still annoying

it just seems odd that I didn’t have a vibration before and then when I Swapped the top pulley for the bottom pulley the vibration started. Leaving me to believe it’s not a pulley shape issue I could switch them back tomorrow and see if it stops vibrating

Did the vibration happen at most speeds? Or only one like mine? I think mines due to belt tension somehow.... maybe the motor.

the pulley I’m looking at is Cast Iron.

so I tried swapping around the pulleys like you said. ( 5-4-3-2 on the spindle 4/ 1/4-3-2-1 on the motor.) The motor pulley was very stuck a couple failed attempts to get it to budge. My RPMs got a lot closer to what they should be! RPM was before 50 - 105 100-254 180-415 300-702 250-521...

Hey Johnwa, that’s a great link thanks. Seems that regular brass rod would work just fine. Are you familiar with the annealing process? I might try this to confirm it will “sheer”

That is a very good observation! I noticed that the previous pin I broke didn’t seem to go through all the way. This is probably because they did not taper the pin. Thanks!

I looked in the manual and I couldn’t find that. Thanks for pointing it out! I think I bought the correct stuff then. I wouldn’t imagine there would be a wide variety in tensile strength through the different grades of brass out there... Unfortunately still using the same set up. I actually...

@YotaBota @YYCHobbyMachinist Hey Gentlemen, What do your 9 inch model A’s have for sheer pins on the lead screws?

Hey guy, I mixed up my direction of travel on my auto feed yesterday and started my lathe with the carriage against the tail stock and it broke the sheer pin on the leed screw. Rather easily... it was a small “pop”. The question now is where do I get a new sheer pin? It’s 1/8 OD by 1 1/4...