circular saw sander.

[gearmonkey]

i have a few circular saws laying around. i was going to use one for a motor to power a 12 sanding disc. my plan is to use a old blade and center a piece of 3/4 inch hard wood disc on it. then use a speed regulater to adjust the speed. mount the motor to a stand and bingo. what do you guys think. is it going to be strong enough for metal sanding.

 

[nate379]

If you use a blade, cut the teeth off for safety.

 

[Brad54]

You might have an issue with metal filings dropping down into the motor.
Disc sanders usually have a platen mounted on a shaft away from the motor.

I like your creativity though!

I have two circ saws: one with a course blade, one with a fine blade, and they never change blades. One gets used for pegboard, thin plywood, the other gets used for everything else.

-Brad

 

[Coptool]

Have you seen the "Final Cut" Sand Paper? Sticks right on a circular saw blade. Could work nice on a blade with no teeth as a sander.

http://www.coptool.com/blog/2009/01/final_cut_saw_blade_sanding_pa.html

I demo some a while back seemed to work good but eventually did what I feared; snagged and became a hassle to remove. Seems like it would be perfect for your application.

 

[JamieK]

I saw this done with a table saw one time. Looked like it worked out well to make a cheap disc sander. BTW, I think Harbor Freight has router speed controls that might work for this.

Another thought... be careful when making the backing plate to keep it balanced.

 

[gearmonkey]

i would take the saw blade and bolt on the wooden disc. the speed adjuster then can be turned down to true up the disc. i am going to try it.

 

[alex71]

It should work, but if you lean into it, even a little bit, one or more of the following will happen:

-- your wooden backer will shatter
-- your wooden backer will warp
-- the motor will stall