[GreenKeys] Motor bearings (TTY bearings in general?)

[John, W9DDD]

So I have one LMU3 (1/20 HP) motor with a noisy bearing.  Looking in the 
box of miscellaneous Teletype parts that have no P/N associated with 
them, I have some bearings of various size.  I have maybe 6-8 bearing 
that caught my attention, but turn out to have 10 mm ID.  Too big!  Then 
I found a couple of cans containing bearings.  One of them had the 
number 122201 written on the top. On the side there is a FSN of 
3110-00-540-4618.  That according to duck duck go, is a bearing with an 
8 mm ID.  Sounds good for the task at hand.

Also on the side is "LUB W/MIL-L-7870A.  First search result 
"LUBRICATING OIL, GENERAL PURPOSE, LOW TEMPERATURE" Not sure if the A 
suffix changes that. (interesting side note, I can buy MIL-PRF 7870 at 
shop.boeing.com)

The most recent Teletype information is to use KTS103 grease.  I haven't 
found an exact reference to that, but there are a lot of others that end 
in -103 like YM-103.

Back to the 10 mm ID bearings, I'm trying to think of where they may 
have been used.  My first thought was 14/15 motors, but the shaft size 
of them is the same as 28 motors, so I think that makes it doubtful.  
Maybe the main shaft on either the 15 or 28?Also have some little ones I 
haven't measured yet.

-- 
---
----
You said "tomorrow" yesterday.

The above comments or recommendations are SWAG. Use at your own risk.
John, W9DDD

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20240125/5a0f6857/attachment.html>