I’ve just finished adding a box to the back of my old contractor’s saw to enclose the entire motor/belt assembly, and a dust port below the saw.
I had replaced the motor drive belt previously with a Power Twist Link belt assembled to the same size as the factory belt. With this belt, however, the motor would rotate above the top surface of the tablesaw. I lengthened the belt by adding a couple more links, made sure that it did not hit anything throughout the rotation, and was able to keep the motor below the saw surface.
My saw sits on top of a roll-around stand (Woodsmith, v. 18, n. 107, Oct. ‘96). The lip jutting behind the saw provides a place for a box to rest on top of, so the resulting box that shrouds the motor needs to:
- Rest on the lip
- Enclose the back opening of the saw
- Extend further to the side and down to be outside of the area swept by the motor as it rotates
- Have a channel to prevent interference with the fence or the motor
- Have a “sawtooth” plate to allow hooking up underneath the tabletop of the saw with all of its bolts and casting ridges
Pictures will make this more clear.
Here’s the back of the saw (“before”):
Here’s a picture of the box, showing the channel and opening, ready to be just lifted into place:
Here’s the box, in place, with top and back panels removed so you can see how things fit inside:
Here’s a close-up of the channel at the top, providing clearance for the back fence rail:
Now, the dust port assembly that fits below the saw. The inspiration for the dust port came from the web:
There are three pieces that provide a lip inside the saw that the port assembly fits into as it hangs below:
Here it is, mounted in the saw:
Finally, the “after” picture with it all on the saw:
Maybe I should have just bought a cabinet saw :-)
I haven’t had a chance to actually use it, yet, so I’ll report back later on how it all works.
As a side note, the back box is not level with the table surface. It’s not designed to handle a lot of weight, and it was not my starting idea to make it act as an out-feed table. If I were starting over, I’d give this some more thought, but my long term intention is to do a much more extensive cabinet for the saw anyway.
-- Every project is a learning experience.