TooManyGT
Plastic
- Joined
- Mar 9, 2013
- Location
- Stafford VA
I picked up a fairly clean sn40b the other day to replace my little 13" Colchester mk1.5 since I had outgrown it. I love the TOS so far but have run into a few problems that I can't find answers to and am hoping someone here with experience can help.
First off is the 8:1 lever on the gearbox, both positions seem to produce a 1:1 ratio instead of the 8:1, I don't have an immediate need for it but it's just confusing me why both positions give me the same ratio, they both power the drive so it doesn't appear anything is broken.
Next is a couple problems that might be related, first is a weird pattern when doing longitudinal cuts, appears to be harmonics almost like a long spiral pattern in the surface and I can't get a smooth finish no matter material, cutter, speed or feed. I checked the spindle bearings for play and they were tight, no detectable movement up and down using a block, bar and indicator and spindle runout didn't even register on the indicator. Gibs are tight and ways are nice and clean.
Another thing I noticed is after running for a while, not doing heavy cuts either, there was a noticeable amount of oil coming out of the spindle.
Is it possible the bearings are bad but still tight and causing this problem and is there a good way to tell?
Headstock doesn't sound noisy to me.
Last question, at least for now, is what is the proper procedure for maintenance of the oil filter? I'm planning on doing the fluids and want to clean the filter while it's drained.
I have a manual I printed on scribd and it came with the manual with all the technical drawings, not sure if I'm missing a page or two or if there is a different manual I don't have because I can't find anything about fluids or adjustments in them.
Thanks for any help
Brad
First off is the 8:1 lever on the gearbox, both positions seem to produce a 1:1 ratio instead of the 8:1, I don't have an immediate need for it but it's just confusing me why both positions give me the same ratio, they both power the drive so it doesn't appear anything is broken.
Next is a couple problems that might be related, first is a weird pattern when doing longitudinal cuts, appears to be harmonics almost like a long spiral pattern in the surface and I can't get a smooth finish no matter material, cutter, speed or feed. I checked the spindle bearings for play and they were tight, no detectable movement up and down using a block, bar and indicator and spindle runout didn't even register on the indicator. Gibs are tight and ways are nice and clean.
Another thing I noticed is after running for a while, not doing heavy cuts either, there was a noticeable amount of oil coming out of the spindle.
Is it possible the bearings are bad but still tight and causing this problem and is there a good way to tell?
Headstock doesn't sound noisy to me.
Last question, at least for now, is what is the proper procedure for maintenance of the oil filter? I'm planning on doing the fluids and want to clean the filter while it's drained.
I have a manual I printed on scribd and it came with the manual with all the technical drawings, not sure if I'm missing a page or two or if there is a different manual I don't have because I can't find anything about fluids or adjustments in them.
Thanks for any help
Brad