|Forum topic by misterjon||posted 01-04-2010 04:31 AM||3282 views||0 times favorited||12 replies|
01-04-2010 04:31 AM
This may sound like a stupid question…. and I think it might actually be a stupid question.
First off, here is the table saw in question… I got from a guy who was offering it for free on craigslist. He said he chose me out of dozens of emails about the ad because I was the only one that said “thank you” for offering it for free.
It is an old craftsman. I am trying to turn it into a competent saw, but I do not have alot of experience. As you can see, I added a home made fence out of extruded aluminum—inspired by this article I found:
Here is my current issue… The previous owner said that sometimes the belt would slip off the motor but otherwise it was a reliable tool. Since it was free, I didn’t ask alot of questions. Soon after I started using the saw, however, I tried making some cuts which required me raising the blade pretty high…. and when I attempted to make the cuts, the belt and the little pulley attached to the motor shaft both fell off the shaft. (the pulley went flying across the room) When I did a little investigation, I found the reason for the problem…
(sorry for the horribly dark pictures) In the upper right hand corner of the pic, you can see the motor bracket, with a curved channel, and a hole where a bolt used to be. The motor bracket would pivot around this bolt as the blade was raised up. As you can (hopefully) make out in the pic, the area on the bracket directly under where the bolt used to sit is deeper than the rest of the channel. When the blade was raised, the motor would raise along with it, and the bolt would glide along the radius of the channel until it reached the “step-up” part of the channel, where it would effectively stop the motor from raising. Any additional blade height was now accomplished by…. stretching the belt!—and you can now guess why the belt would go flying off as soon as the blade hit the wood.
here is a close up of the area around the bolt… I am guessing that due to the weight and vibration of the motor, the bolt ground away the area underneath it over time, and created the “step-up” in the channel where it would get hung up whenever the blade was raised.
I hadn’t decided how to solve the problem. Then, one day, I looked and the bolt had fallen out on its own accord! I have been using it like that for weeks now. The benefit is that the belt does not go flying off when I raise the blade. On the other hand, I assume the bolt was there for a reason and I don’t want to be unsafe.
SO! Should I just say “problem solved” and keep using it as is… or is there a good reason I put the bolt back on??