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How I built my disc sander

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Blog entry by Dror posted 07-08-2014 05:58 PM 3057 reads 5 times favorited 12 comments Add to Favorites Watch

It all started with a old dryer that had a very good motor.


I took it out of the dryer, cleaned it and after a short inspection I decided it could use a new life.


I operated the motor mounted on a short scrap wood and used a saw to shorten the shaft and then a rasp to make it suitable for my needs.


Had a friend turn a 4” flange to hold an MDF disc sized 10.2” with 6 bolts.


Drilled the disc and prepared the surface for flash mounting the bolts.


While the motor was turning I used a chisel to correct the center and reduce the diameter to match a 10 ”
disc.


several coats and sanding to make it better hold the Velcro disc.


Took the wires and made sure they stay out of the moving parts.


Added the sides and front all cut by hand and attached with a kreg jig.


Added the back.


Made a safe attachment of the mains cable to the box.


Built the cover and used 4 screws to make it possible to open.


Placed the Velcro back as good as I could center wise.


Used the Velcro’s pealed back to make sure my sanding disc slips into position without touching the velcro.
And then took it out and let the sanding disc mount the the Velcro.

Thats it and thanks for reading my first blog entry!



12 comments so far

View TheJBitt's profile

TheJBitt

34 posts in 1425 days


#1 posted 07-08-2014 06:06 PM

Nice! Really well planned out.

I have no idea how much umph a drier motor has. Is it easy to slow it down, or will it grind down larger pieces without a problem?

-- I make great sawdust. -Jon in Warsaw, IN

View Dror's profile

Dror

60 posts in 885 days


#2 posted 07-08-2014 06:18 PM

Well,

It is not a huge motor but it spins very fast even maybe too fast as the motor is rated at 2880 rpm. And the rear fan is not letting the motor reach that speed as it provides resistance.

I use it to shape corners and edges and for that it woks amazing and slows less than you would imagine under such loads.
Also bare in mind that the MDF disc is heavy and it also stabilizes the speed.

View woodsawdustmaker's profile

woodsawdustmaker

37 posts in 3091 days


#3 posted 07-08-2014 07:50 PM

A typical dryer motor is in a more open space and does not overheat but I was wondering if you have any ventilation for your motor.

-- Max - Birmingham, AL

View Dror's profile

Dror

60 posts in 885 days


#4 posted 07-08-2014 08:20 PM

here is the back panel
the fan sucks air from these holes and blows the dust out of the box.
it doesnt get hot at all.

View Dror's profile

Dror

60 posts in 885 days


#5 posted 07-08-2014 08:22 PM

and this is the switch I added on the right side of the motor

View luv2learn's profile

luv2learn

2466 posts in 1770 days


#6 posted 07-08-2014 09:23 PM

Dror. great use of the old dryer motor. Home made tools are the best…LOL!! Nice build.

-- Lee - Northern idaho~"If the women don't find you handsome, at least they ought to find you handy"~ Red Green

View Tugboater78's profile

Tugboater78

2450 posts in 1659 days


#7 posted 07-08-2014 09:49 PM

Good job, I have several old motor sitting around ive been wanting to make into a disk sander. May I ask where you acquired the large Velcro piece?

-- "....put that handsaw to work and make it earn its keep. - summerfi" <==< JuStiN >==>=->

View JoeinGa's profile

JoeinGa

7487 posts in 1474 days


#8 posted 07-08-2014 11:05 PM

Nice job ….

-- Perform A Random Act Of Kindness Today ... Pay It Forward

View Mean_Dean's profile

Mean_Dean

5061 posts in 2614 days


#9 posted 07-09-2014 12:27 AM

Great looking disc sander! Sounds like you thought of everything, and should get a lot of good use out of it!

-- Dean

View Oldtool's profile

Oldtool

2375 posts in 1657 days


#10 posted 07-09-2014 12:57 AM

Very nice, the ingenuity of woodworkers, and their resourcefulness, is amazing.
Old saying: “waste not – want not”. Great work on this sander.

-- "I am a firm believer in the people. If given the truth, they can be depended upon to meet any national crisis. The point is to bring them the real facts." - Abraham Lincoln

View Dror's profile

Dror

60 posts in 885 days


#11 posted 07-09-2014 01:34 AM

Hi everyone, thanks you for the kind words

Tugboater78 here is the link:
rexon spares

View Tugboater78's profile

Tugboater78

2450 posts in 1659 days


#12 posted 07-09-2014 04:04 AM

Thanks for the link, it will hopefully get me closer to getting a sander done of my own.

-- "....put that handsaw to work and make it earn its keep. - summerfi" <==< JuStiN >==>=->

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