1930-40's south bend trying to find source of squeak

M

Metal

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South bend, not sure what model, but it has the power feed with the lever on top which I believe puts it pre-WWII. It is the model near the top of this manual: http://vintagemachinery.org/pubs/1617/3767.pdf

Here's the problem, when running the spindle, there's a squeaking/rubbing sound that I can't seem to locate.

oiled throughly
removed rear upper bushing housing, ran spindle, still squeaks
Same with the front
Disengaged the jaws with the low gear pin thing, still squeaks.
Found a screw labeled oil in the middle pulley caked in grime, cleared that and filled it with oil, still squeaks.

it "sounds" to me like it is coming from the front section of the spindle, my current theory is it is the parts in front or behind the bushings rubbing on the bushing housing (eg, the forwards/backwards slack is a little too tight) so i'm going to take out the spindle and wire brush/oil that area tonight.

Now here's the question: anything else you can think of that it could be? Where to I make the adjustment to loosen that axis up a scoonch?
 
Be careful, noises may not be coming from where you are guessing. My first guess is that if you are looking for a squeak, that it is a belt noise.
 
What kind of SB is it, could be the motor v belt , a little sope will tell you
There is a important procedure for removing SB10L spindle so you don't harm the bearings
 
RandyM said:
Be careful, noises may not be coming from where you are guessing. My first guess is that if you are looking for a squeak, that it is a belt noise.
Click to expand...
it is not belt noise if I move the spindle by hand and it squeaks with the belt removed
 
Change speeds by various methods and listen for change or not in frequency.

Next get a spray bottle and place a 10 yo 1 solvent oil mix then spray while running into anyplace something is moving and listen for change.

Sent from my SAMSUNG-SGH-I337Z using Tapatalk
 
Hi Randy,

If you were to post the serial number, then we might be able to see a parts list to better able to come up with some ideas for you. Are there removable bearing caps on your lathe, and, if so, are there brass shims between the halves? Just the edge of a brass shim touching the spindle could cause a squeak.

Brian
 
I managed to figure it out, it appears to be a tiny amount of play in the vertical direction in the spindle, but if I tighten it down any more it gets pretty "sticky" so I'm going to have to play around with the shimming it seems
 
Both my 9" and 16" south bends required additional shimming when I got them, previous owners had them to tight and they generated heat at the bearings fairly quickly when using them. Easy to recognize by just holding your hand on the bearing caps after running them for 15mins or so.
 
Check out page 15 in this South Bend document "Keep your lathe in Trim". There are three other SB docs in this set... H-1 (Keep your Lathe Clean), H-2 (Oiling the SB Lathe) and H-3 (Installing and Leveling your SB Lathe). You can find them by Googling or if you have any trouble finding them let me know and I'll try to post them here.

Ted
 

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Thanks guys, I'm going to try and hit it this Sunday if I can, I need to adjust the belting as it seems to want to wander forwards anyway.

once tightened and "sticky" I was able to get a pretty good surface finish on aluminium so I think that was the source of my problems. I've also ordered a cheapie quick change tool post to see if I like it more than the current tool holder that uses shims.
 
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