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Thread: Belt Sander

  1. #1
    markfitz's Avatar
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    Apr 2016
    Phoenix, AZ
    Thanked 51 Times in 13 Posts

    markfitz's Tools

    Belt Sander

    Belt Sander:
    - Belt size - 6" x 48"
    - Belt speed - 1260 ft/min
    - Motor size - 3/4 hp
    - Motor speed - 3460 rpm
    - Roller spacing - 20" nominal

    Belt Sander-sander-front.jpg

    Belt Sander-sander-back.jpg

    Sanding Belt tension and tracking adjustment
    Belt Sander-sander-belt-adj.jpg

    I made this belt sander from an 8" bench-top grinder from Harbor Freight. With a 20% off coupon, it only cost me $40, which is a lot less than I would have paid for just a 3/4 hp motor on its own. The first parameter that must be established is the belt speed that you want. I settled on something around 1200 to 1300 feet per minute. The motor speed of 3450 rpm dictated a reduction between the motor and the Drive Roller in order to have a practical roller diameter. I reduced the Drive Roller speed by 1.9:1 down to 1816 rpm. A roller diameter of 66 mm (2.6") gave me a belt speed of 1260 ft/min. Belt rollers were made from 9 layers of Baltic birch plywood. I crowned the rollers in the middle by .060" to help the belt tracking. I tried to keep everything simple with the sanding belt tension and tracking adjustment, as shown in the picture.

  2. The Following 13 Users Say Thank You to markfitz For This Useful Post:

    Captainleeward (02-25-2018), DIYer (02-17-2018), LMMasterMariner (02-26-2018), Marine2171 (06-21-2018), nashty1 (02-16-2018), NortonDommi (06-21-2018), Paul Jones (02-26-2018), PJs (02-16-2018), rlm98253 (06-21-2018), rossbotics (02-25-2018), Seedtick (02-16-2018), Toolmaker51 (02-23-2018), Tuomas (02-25-2018)

  3. #2
    Content Editor DIYer's Avatar
    Join Date
    Aug 2013
    Thanked 743 Times in 678 Posts

    Thanks markfitz! We've added your Belt Sander to our Grinding category,
    as well as to your builder page: markfitz's Homemade Tools. Your receipt:

  4. #3
    rossbotics rossbotics's Avatar
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    Dec 2013
    Thanked 1,226 Times in 344 Posts

    rossbotics's Tools
    Very Good markfitz
    anything is better than harbor freight, I'm sure it will last too

    Comments are always welcome

    Subscribe to my you tube channel

    Tool Plans for Sale by rossbotics

  5. #4
    Captainleeward's Avatar
    Join Date
    Jul 2014
    San DIEGO, California
    Thanked 1,028 Times in 461 Posts

    Captainleeward's Tools
    Very good work looks like it will last a long time. I had to adjust my belt sander today went off 90* now its back. Cap . Be a friend just ask.

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