I have a Makita belt sander model 9924DB. It is for 3" x 24" belts. I
have noticed that the Tension Roller is not turning when the unit has a
sanding belt on. I then noticed that the roller is difficult to turn by
hand. So I took it apart and cleaned up the roller shaft, the 2 cup
washers, and the roller.
I have 2 questions:
1- What should I use to lubricate theroller assembly?
2 - What is the size of the retailing ring that goes on the roller
shaft? My parts list only says Part # 66, retaining ring s-12.
Unfortunately the retaining ring went flying across the garage and is
not to be found.
Thanks for all your help.
I lubricated mine with a synthetic instrument grease that I've had around
for about 30 years (don't ask where I got it, I don't remember). Anyway, I
like this grease because it never hardens like the natural greases do. Any
good high quality automotive grease should work too, but it may thicken over
time and need to be replaced again. It needs to be thick enough not to run
so it'll stay where you put it, but not hard thick like a wax. Whatever you
use, be very careful not to use so much that it works out and starts
dropping on your wood (that's the only real critical part of your choice and
application). A very thin coat on the shaft, rubbed on with a finger is
enough (but you'll probably need to do it again in 5 or so years).
The retaining ring can be obtained from Makita (long wait and probably
expensive) or from any "real" hardware store. You know, the ones that have
been around forever and have little bins of all kinds of precious stuff.
Take your sander with you and show them what you need. They will sell you
one that fits (buy at least one extra - the replacement may fly away too).
These clips are called E clips (my son calls them "fly washers"). They are
the only mechanical parts that I know of that can accelerate to light speed
in less than one inch of travel. You never see them leave, but you always
hear where they've been. (looking where you last heard them will never
locate them - where they stop is a silent landing, usually on the opposite
side of the shop from where the last sound came from)
"mike" < email@example.com> wrote in message
I'm thinking Bostik's bearing lub which is basically a graphite dry lube in
sprayable form, the operative feature being it won't attract saw dust. BTW,
that retaining ring is called a Jesus clip, as in, Jesus, I lost another
My parts list only says Part # 66, retaining ring s-12.
The rings are usually called circlips where I come from, and you might as
well bite the bullet and get a set of circlip tools right now, to be used
ten times in your life, each one of which will save you so much aggravation
that you'll wonder how you ever did without 'em.
Oh yes, while you're at the hardware, get a basin wrench. Same story.
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