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# Thread: 1 HP 2" Belt Sander

1. ## 1 HP 2" Belt Sander

I've been wanting a 2" belt sander for some time but most on the market are flimsy, low HP, and tracking is always needing to be adjusted. I found some 1 HP flange mount motors at https://www.surpluscenter.com for under \$50 so I designed around them. I had some scrap 1/4" plate and 3" x 3/8" angle so this is what I ended up with.

This is the "mule" build that I gave to a friend who turned the wheels. (I am without a lathe right now and looking for one.) With The 1 HP motor, this sander can really remove metal fast.

I will post more detailed photos later of the sander I kept, and the stand that I built for it.

2. ## The Following 8 Users Say Thank You to tekcraft For This Useful Post:

baja (11-14-2019), high-side (11-14-2019), Jon (11-12-2019), olderdan (11-15-2019), Rangi (11-13-2019), Slim-123 (11-13-2019), Tule (11-14-2019), Tuomas (11-15-2019)

3. What size belt are you using?

4. ## The Following User Says Thank You to Chadboye For This Useful Post:

DrByte (11-15-2019)

5. ## Belt Size

I'm using the 2"x 48" belt size which is available from many suppliers.

6. ## The Following User Says Thank You to tekcraft For This Useful Post:

7. How do you determine how far the wheels are to be spaced apart for the size of belt you choose to use?

8. My wheels were both grooved to the same dia of 3.75". The circumference of that dia =3.75 x 3.1416 (Pi) = 12.81" So a 48" belt - 12.81 = 35.19" That divided by 2 = 17.6" the center-to-center distance.
I used a 1" OD x 4" long spring inside the 1.25 sq tube to get the proper belt tension. For a 2" wide belt 3M recommends 40-50 lbs of force. If you know the spring rate, you can then determine how much it must be compressed to get the right belt tension. I designed around this compressed spring length but also put an adjusting screw under it so someday as the spring ages my grandkids can tighten it up.

Another option if you already have your wheels & belt is to have someone hold the belt tight with the wheels and then measure the center-to-center distance.

Happy building !

9. ## The Following User Says Thank You to tekcraft For This Useful Post:

10. Thanks tekcraft! We've added your Belt Sander to our Belt Sanders and Grinders category,

11. Neat work! It sure looks pretty.

... I designed around this compressed spring length but also put an adjusting screw under it so someday as the spring ages my grandkids can tighten it up.
I think that build will last for your grand- grandkids too.

12. Thanks so much, that really helps me alot!! I really want to build a 2x72 grinder but I'm thinking that a 2x48 like yours would be alot better for me right now, plus I'm very limited on space in my tiny little shop in my basement.

13. awesome!!!

14. A very nice compact design that would suit my limited space workshop, I recently acquired a treadmill motor (not so plentiful in the UK) so planning on using that for drive. Looking forward to your more detailed post.
thanks for sharing.

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