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Making a homemade 12" disc sander

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Forum topic by BrianC87 posted 12-27-2013 03:48 AM 4949 views 0 times favorited 14 replies Add to Favorites Watch
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BrianC87

38 posts in 1654 days


12-27-2013 03:48 AM

Topic tags/keywords: question sander

I’m looking into building a 12” disc sander and was wondering what size hp motor would be the best to use for it. It looks like I would have a 1/6, 1/3, or 1/2 hp available.


14 replies so far

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waho6o9

7172 posts in 2040 days


#1 posted 12-27-2013 03:53 AM

View distrbd's profile

distrbd

2227 posts in 1910 days


#2 posted 12-27-2013 04:06 AM

I tried building one(12” disk sander) using the following link :

http://benchnotes.com/DISK%20SANDER%20/Disk_Sander.html

The main problem for me was to cut a well balanced 12” disk out of MDF and attaching it to a 2” pulley.
I soon realized I would have a better chance of success finding a 12” aluminum disk like what you might find as Shopsmith accessory.
I ended up buying a ready made one and never looked back.

-- Ken from Ontario, Canada

View TheGermanJoiner's profile

TheGermanJoiner

847 posts in 1101 days


#3 posted 12-27-2013 05:06 AM

If you decide to do it post some pics

-- Greg - Ferdinand and Son Construction: Do it right the first time. Like us on Facebook

View mtenterprises's profile

mtenterprises

933 posts in 2156 days


#4 posted 12-27-2013 12:54 PM

I’ve done it with a 1/3 but a 1/2 would be better. When doing this – 12” disk out of MDF and attaching it to a 2” pulley – make the disk over sized by a bit then when attached to the motor you can take a chisel and cut it down like on a lathe.
MIKE

-- See pictures on Flickr - http://www.flickr.com/photos/44216106@N07/ And visit my Facebook page - facebook.com/MTEnterprises

View crank49's profile

crank49

3981 posts in 2434 days


#5 posted 12-27-2013 01:19 PM

Use the biggest motor you have, at least the 1/2 hp; 3/4 or 1 hp would be better.
I’d put it on a bearing mounted shaft and drive it with a belt so I could modify the speed.

-- Michael: Hillary has a long list of accomplishments, though most DAs would refer to them as felonies.

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wingate_52

224 posts in 2033 days


#6 posted 12-27-2013 05:46 PM

I made 2MDF discs, mounted them to faceplates. Put them on the lathe to true up. Added the abrasive discs. I made a table from ply with a mitre guide groove, with a plate and bar that fits into the tool rest. Add a dust hose nozzle and grind away.

View JoeinGa's profile

JoeinGa

7481 posts in 1470 days


#7 posted 12-27-2013 09:49 PM

Here’s what I made…

http://lumberjocks.com/joein10asee/blog/34349

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

View dbhost's profile

dbhost

5605 posts in 2695 days


#8 posted 12-27-2013 09:51 PM

Do you have a lathe with at least 12” swing? If so you just need a sanding disk and platform. Most of your work is already done for you…

-- My workshop blog can be found at http://daves-workshop.blogspot.com

View Rick M's profile

Rick M

7913 posts in 1843 days


#9 posted 12-27-2013 10:58 PM

I drive a 9” disc with a 1HP variable speed motor and it takes a lot to bog it down at low speeds, at higher speeds (1250 or higher) it doesn’t bog. I would build it then test with the 1/3HP but you’ll probably end using the 1/2HP.

-- http://thewoodknack.blogspot.com/

View BrianC87's profile

BrianC87

38 posts in 1654 days


#10 posted 12-28-2013 04:34 AM

Thanks everyone for the replies. I do not have a lathe at this time, but I have seen people go that route and would have been the ideal way to do it.

I’ll have to check in the morning to see what the largest available motor is that we have and go from there. I’m planning to build it based on a couple of models I have seen done here. Unfortunately I do not have a heated shop and will not be able to actually work on it until spring, but I will try to post updates at that time.

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JaySybrandy

78 posts in 1040 days


#11 posted 04-26-2014 08:10 PM

1/2hp or more xD

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JaySybrandy

78 posts in 1040 days


#12 posted 04-26-2014 08:19 PM

View MrRon's profile

MrRon

3926 posts in 2707 days


#13 posted 04-26-2014 10:33 PM

I built one using a 12” disk from a Shopsmith and direct drive it with a 1/4 hp motor. The motor is not big enough. 3/4 or 1 hp would be better.

View Rick M's profile

Rick M

7913 posts in 1843 days


#14 posted 04-27-2014 02:20 AM

Ron, you could set up a pulley system and gain more torque at the expense of speed.

-- http://thewoodknack.blogspot.com/

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