Help! drive belt comes flying off when adjusting angle - Router Forums
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post #1 of 19 (permalink) Old 05-08-2015, 01:04 PM Thread Starter
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Default Help! drive belt comes flying off when adjusting angle

This could be a novice question but I recently inherited this old craftsmen table saw and I am in the process of cutting angled pieces of floor moulding. I feel as is if this table saw is missing something. I adjust the blade angle to 45 degrees but the pulley at the motor remains the same. This won't work because it will instantly fly off.

I included a couple pictures if it helps

Any help would be excellent.

Last edited by JoshD; 05-08-2015 at 01:10 PM.
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post #2 of 19 (permalink) Old 05-08-2015, 01:12 PM Thread Starter
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pictures
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post #3 of 19 (permalink) Old 05-08-2015, 01:31 PM
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Believe you're right, Josh...motor should swing with the blade. Can't tell by the picture as the motor is blocking the view but it looks like a big part of the casting is either broken or missing. Typically there would be a platform for the motor to sit on that would swing with the saw...

Do you have a model nr...? Can you attach a clear picture of that hunk of casting on the left...? 2nd and 3rd picture...

I would also add that the current motor mounting looks "after market"...probably after the real mount broke...

If this isn't the case, the motor might slide side to side to accommodate the blade movement...


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Last edited by Nickp; 05-08-2015 at 01:34 PM.
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post #4 of 19 (permalink) Old 05-08-2015, 01:38 PM
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The more I look at the last picture the more I'm inclined ti think the bracket on the motor should attach to the saw to make it slide left n right. In that case a skinnier belt might keep it on...

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post #5 of 19 (permalink) Old 05-08-2015, 03:51 PM
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Hi, Josh; welcome!

The motor mounting arms are attached firmly to the base casting...see top picture. A very strange arrangement to be sure; the motor bracket seems to have the ability to slide Left to Right with very generous allowance.
To be honest, I'd be inclined to save the motor and blade, and sell the rest for scrap.
Maybe make it into a disc sander?
Doesn't look like it has a decent fence, and the table is tiny. No way would I even attempt to run a 4X8 sheet through there! The m/c's footprint is huge relative to the table size...the exact opposite of a modern TS.
Sorry, Josh, I hate to be negative, but it's long past it's best before date. Are you possibly in the market for a new table saw?
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post #6 of 19 (permalink) Old 05-08-2015, 04:50 PM Thread Starter
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Hey thanks for your input so far everyone. I wont be scrapping this antique anytime soon so I have to do the best with what I got. Nick I agree with you as well that the bracket should attach to the saw somehow but even so, the solid rod that supports the motor prevents it from pivoting with the angel of the saw.

Here's a couple more pictures if it helps
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post #7 of 19 (permalink) Old 05-08-2015, 04:57 PM
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The casting that moves with the saw appears to be broken off at a bolt hole. You might be able to get someone to fabricate the suspected missing piece or you might get lucky and find a dead one with the right part.
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post #8 of 19 (permalink) Old 05-08-2015, 06:21 PM
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Looks to me as if the original motor frame was broken and the user just welded it up to use the saw at 90.....
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post #9 of 19 (permalink) Old 05-09-2015, 06:51 AM
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The sheave on the motor is mounted on the far end of the drive shaft, the pulley on the drive itself is mounted close to the drive assembly. Until proper repairs are made you might get away with relocating the pulley's and check the width of the belt. The belt looks close, but ok on the motor end, but it may be too big for the drive pulley. Definitely NOT a fix, but more of a work-around until proper repairs can be made. Your gonna have to adjust the position of the pulley/sheave each time you go from 45 to 90 degrees.

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post #10 of 19 (permalink) Old 05-09-2015, 08:19 AM
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Default I have the same saw

I have the same table saw. There should be a pin(about 1/4" diameter) sticking out from the mechanism that engages the slot in the motor bracket. This makes the motor slide right or left as the blade is tilted and keeps the pulleys more or less aligned. I'll take a picture of my setup and try to post it.
My comments on the saw. I bought it used about 40 years ago, and with input from my father built a stand. It has served me well for lots of projects. I did replace the motor when the bearings wore out.
It only takes a 8" blade and has a 1/2" arbor so I have to use inserts as most all blades now have a 5/8" hole. I've considered having a machinist make me a 5/8" arbor. I keep thinking of buying a new 10" saw but my taste keeps exceeding my budget.
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