Planning to replace drive belts on the saw (jerky start up) and want
to make sure I get the right size and enough length. The existing
belts (off brand automobile v-belts (original?)) are 1/2" on the wide
side. My imprecise estimate is that they're each about 24" in total
So is 1/2" link belt and buying 8' (3 belts plus the "more is better"
principle) about right?
thanks for the input. The saw is not "new" as I bought it used, but
not VERY used. The prior owner had it in one of those public storage
sheds for about 1 yaer before getting tired of paying the fees, so it
sat unused in Texas heat for some time. I suspect the belts toook a
pretty god "set". They look great, no visible wear. I've run five or
six hours on it in the last couple of weeks. The first start up of the
day is pretty abrupt, then subsequent starts are smoother as the belts
I don't mind the expense of sticking link belts on it, just not sure
I would be tempted to "rotate" the belts. Take off the tension, rotate
one belt a third, rotate the second belt a third the other direction,
leave the last belt alone, retension. I think this would cancel out
any "set". I also think that a bit of Googling in this group would
suggest that abrupt startups are more or less normal anyway.
On Sat, 21 May 2005 18:54:17 -0500, "Darrell Dorsey"
Thanks Darrell. I appreciate your response. Regrettably the only
markings on the existing belts are
"First Auto Belt", "17-250" then a "20915". probably a part number.
Probably Taiwan markings. I had hoped that someone with a Jet knew
the right size.
I still have the belt from Jet Contractor saw that I had as well. It says
the same thing. I installed a link belt on it. My guess is the 250 means
is 25". It was an 1/2" belt, size A.
WW Grainger has a good overview of different sizes of v belts and a picture with
dimensions for each. It begins on page 252 of their online catalog, their site is
www.grainger.com. The information on the belt sizes is very useful if you have a belt
with hard to understand numbering systems or (as in my case) have a pulley that you are
not sure what size belt it is made for. I had to reference this info just today to insure
that the power twist belts I have were in the right size to be used in a compressor I am
just finishing building. I usually buy the power twist belting off of ebay in 25' boxes.
There are different sizes of power twist belting as well but they usually overlap, with
one sizes covering two or three sizes of v-belt. The loops you can buy from rockler or
harbor freight are usually the size that covers the 'A' and 'B' series of v-belt sizes and
are about 5' long overall.
I have used the loop belts for some time and the really do reduce the transmitted
vibrations from the motor you will likely be able to hear it , or rather not hear it so
much. Let me know if you have any other questions about loop belts and I will do my best
to get you an answer. I had to go through the fact finding process for this stuff some
time ago so I may be able to save you some time and effort, hope this helps. Joe
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