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Thread: Air power file convesion to 12 volt.

  1. #1
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    th62's Tools

    Air power file convesion to 12 volt.

    I bought an air belt grinder a while back which proved a little too air hungry for my compressor, so, rather than buy a bigger compressor I converted it to run off 12 volts.

    The motor came from ebay as a 12 volt cordless drill spinning at 5000 rpm. I removed the air motor and as luck had it the 12 volt motor fitted perfectly in the grinder housing. I also turned up a 12 mm bush with a 3mm hole to fit over the motor's shaft and shrunk fit that into the belt drum, constructed a handle from 22 mm tube and inserted a switch in it. To protect the motor I turned down a PVC pip fitting and heat shrunk it over the motor leaving an air gap to coincide with the motors vents, Sikaflexed an end cap in place and cut some grooves under the cover to aid cooling.
    The grinder works great and is certainly better than forking out $300 for a Makita belt grinder. some pics and a video:
    Attached Thumbnails Attached Thumbnails Air power file convesion to 12 volt.-g1.jpg   Air power file convesion to 12 volt.-g2.jpg   Air power file convesion to 12 volt.-g3.jpg   Air power file convesion to 12 volt.-g4.jpg  

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  2. The Following 5 Users Say Thank You to th62 For This Useful Post:

    olderdan (Feb 26, 2018), Paul Jones (Feb 26, 2018), PJs (Feb 26, 2018), rlm98253 (Feb 26, 2018), Seedtick (Feb 26, 2018)

  3. #2
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    Great idea th62 very resourceful, what 12v source are you using? it could run of a vehicle socket if working in the field.

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

    PJs (Feb 26, 2018)

  5. #3
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    The motor is a 12 volt Cordless drill motor. Very high current draw though.

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    Thanks th62! We've added your Pneumatic Belt Grinder Modification to our Grinding category,
    as well as to your builder page: th62's Homemade Tools. Your receipt:






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