Has anyone used an old food processor motor to make a tool shapener?

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Forum topic by MikeNap posted 03-29-2015 11:00 PM 1396 views 0 times favorited 11 replies Add to Favorites Watch
View MikeNap's profile


10 posts in 1095 days

03-29-2015 11:00 PM

Topic tags/keywords: question

Hi Folks,

I came in possession of an old Cuisinart food processor motor. The first thing I thought of was ‘can I use this to make a tool sharpener, with the stone running horizontal?’ Anyone have any experience or thoughts on this?

11 replies so far

View Fresch's profile


93 posts in 1758 days

#1 posted 03-29-2015 11:47 PM

Build a table over it with a screw adjustable hinge to get your degrees needed?

View AlaskaGuy's profile


3652 posts in 2146 days

#2 posted 03-29-2015 11:59 PM

No, my biggest concern would be how fast the blender spins. To fast might cause stone failure.

-- Alaskan's for Global warming!

View bigblockyeti's profile


4697 posts in 1558 days

#3 posted 03-30-2015 12:05 AM

If you’re using the gear reduction, the speed should be close to what most ~6” wheels would work at. Running the motor alone you would need a fairly small stone or it could fail.

View crank49's profile


4026 posts in 2808 days

#4 posted 03-30-2015 02:58 AM

The question I have to ask is “WHY?”
Those things spin at more than 12,000 RPMs
I wouldn’t want to be in the same room with it if it was spinning a stone any larger than 1/4” diameter.
Better re-purposed as a router, maybe.

View MikeNap's profile


10 posts in 1095 days

#5 posted 03-31-2015 05:37 PM

Good point, Crank49. I didn’t see how fast it spun – I’ll make sure. I don’t have the $200 to lay out for one of the sharpeners, and the motor was so quiet. Looked like a fit. Thanks for the warnings and advice everyone.

View knotscott's profile


7787 posts in 3213 days

#6 posted 03-31-2015 05:41 PM

You can always gear it down if you’re comfortable doing that.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

View MikeNap's profile


10 posts in 1095 days

#7 posted 03-31-2015 05:54 PM

I will think about gearing – just found out that they spin at 1750-1800 rpm. I might also try a variable speed control. Hmm.

View Dallas's profile


3599 posts in 2324 days

#8 posted 03-31-2015 06:05 PM

Harbor Freight sells a speed control for a router for about $16. It will work just fine with your processor motor.

Drop it down to lowest speed, and if you have to add a power resistor in between the controller and the motor. Adapt a mandrel holder, or even a jacobs type chuck off an old drill motor, Either find a 3” or 4” sanding disk and go to town, or do what I did, make your own sanding disk with MDO and use glue on 6” sheets. If I need wet – dry, I use 3M #77 spray adhesive on automotive sand paper to make it stick.

Good luck, with your endeavor….. read my tag line.

-- Improvise.... Adapt...... Overcome!

View bigblockyeti's profile


4697 posts in 1558 days

#9 posted 03-31-2015 07:34 PM

Not sure what kind of $200 sharpener you’re looking for, but you’ll end up with something closer to a $60 bench grinder if you’re planning on using a high speed universal motor from a food processor.

View dhazelton's profile


2610 posts in 2134 days

#10 posted 03-31-2015 07:41 PM

Find a foot massager or maybe a kids rock tumbler.

View MikeNap's profile


10 posts in 1095 days

#11 posted 03-31-2015 07:42 PM

Thanks for the info, Dallas. I’ll post another entry when I rig this up. MDF is a great idea.

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