SB 10L (1945) Mystery Squeak...Thoughts?

[opsoff1]

Looking for thoughts or a start point to identify and eliminate an odd squeak I have in my 10L Tool Room (8187ZN) lathe.
I bought this back in 1995 and have used it steadily over the entire time. Now that I am a bit older and looking at retirement - I have more time on my hands.
I decided to go through the entire machine and clean/adjust/paint etc. Not a restoration, but a semi-refurbishment.
The squeak has always bugged me - but I got used to it.
Now I want it gone.
It is definitely coming from the head stock - up above and as best I can tell near the chuck. It is timed to the rpm. Almost like a chirp.
I thought that maybe it was the metal clips on the leather belt - ruled that out.
My next guess would be maybe the bearing near the chuck - but I would think it would be constant if it was a bearing.
I did find that i could eliminate it by reducing the belt tension from underneath - but I can then stop the chuck with my hand. No beuno
I am hesitant to take it apart without know what's what.
So...I'm stumped -
Any pointers from the experts?

TIA

Scott

 

[DrHook]

The belt might be chirping. Usually caused by some sorta chemical or oil or cleaner on it. Sprinkle some talcum powder/baby powder/monkey butt powder on it while it is running.
BTW_ no "expert"...

 

[Dobermann]

Check the alignment of the flat belt. If it is a little off-center and the edge of it rubs against an adjacent shoulder it will "chirp" every time it goes around. Mine does that and I ignore it because to change the alignment I have to move the under cabinet counter shaft assembly which is not easy.

 

[opsoff1]

Thank you for suggestions! I will try these tonight.
I am planning to install a synthetic/nylon glued belt - assuming these don't have the same issues?

 

[reggie_obe]

Find the source of the problem before introducing a new variable to the mix.

 

[jim rozen]

Lift the belt cover and run it. My belt was rubbing on the lube chart under there. Lube chart lives in the cabinet these days.

 

[jmm03]

monkey butt powder??

 

[garyphansen]

Likely caused by wear in the backgear pin hole. If so, just live with it.

 

[dalmatiangirl61]

monkey butt powder??

I'm guessing you don't patronize farm and ranch stores
https://www.antimonkeybutt.com/

 

[opsoff1]

Issue solved - Dobermann nailed it.
I carefully used a round rod and put a slight pressure on the right edge of the belt to get it to ride away from the shoulder while running. Chirp disappeared!!
I looked at the alignment of the belt splice - uses the metal clips and a synthetic rod inside. The ends of the belt seemed to be of different widths - so I flipped the belt 180 deg - readjusted the tension and viola' chirp gone!
Thanks for all the pointers and ideas - really appreciate it.

 

[DrHook]

...your monkey will thank you for not wasting his powder

 

[opsoff1]

Happy monkey - happy life!

 

[opsoff1]

Another question...
1945 10L w/ bronze bearings.
I popped off the bearing caps to have a look-see and found the chuck side bearing had the expander installed incorrectly (on top of the bearing) I got everything back together correctly but my google feng shui is bad today - I can't find adjustment procedures for this - 10K & 9 all over the place.
Suggestion / link?

TIA

 

[SLK001]

Another question...
1945 10L w/ bronze bearings.
I popped off the bearing caps to have a look-see and found the chuck side bearing had the expander installed incorrectly (on top of the bearing) I got everything back together correctly but my google feng shui is bad today - I can't find adjustment procedures for this - 10K & 9 all over the place.
Suggestion / link?

TIA

Look at this thread.

As for your bearings, I don't believe that in 1945 SB had gone back to bronze bearings. The war required all the copper, so all head bearings were of the segmented cast iron variety. I'm assuming that your lathe had a "head transplant" sometime in its life.

 

[opsoff1]

Any way to tell if the head stock is original?
(My machine in question is a 8187ZN 10LX Tool Room Model.)

 

[jmm03]

I'm guessing you don't patronize farm and ranch stores
https://www.antimonkeybutt.com/

I had no idea actually. I thought it might have beneficial use in the US congress...

 

[SLK001]

Any way to tell if the head stock is original?

Look for the headstock Unit Code located somewhere around the reversing lever. A 1945 HS should have a UH-105 Unit Code. Later versions should have a Unit Code like VH-105.

 

[opsoff1]

I will check tonight.
Thank you!

 

[opsoff1]

I looked and found the unit code - stamped exactly where you indicated: "UH105"

 

[SLK001]

I looked and found the unit code - stamped exactly where you indicated: "UH105"

Okay. Your HS seems to be original (I thought the change back to bronze was in the '47-48 time frame).
Is that link going to help you adjust the bearings?