How to Change the Dremel Sanding Band

Written by james young
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Dremel tools--small enough to rest in the hand and use like a pen--spin small drill bits, sanding drums and hi-speed cutters at speeds from 5,000 to 35,000rpm. Sanding drums work best at the lower end of that range and perform efficiently for many small scale jobs. Sanding bands for the Dremel tool's two sizes of sanding drums come in only three grits of coarse, medium and fine. Since the total area of the abrasive band is small, the Dremel tool sander bands wear out quickly, but changing them is easy.

Skill level:

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Things you need

  • No. 407 sanding drum
  • No. 430 sanding drum
  • Abrasive sanding bands to fit
  • Dremel rotary tool
  • Collet wrench
  • Flat tip screwdriver

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  1. 1

    Slide the power switch of the Dremel tool to the "Off" position. Unplug the power cord. Let the machine and the sanding attachment cool before switching out the sanding collar.

  2. 2

    Hold the Dremel in your left hand, and depress the arbor lock button on the top in front of the power switch. Rotate the collet chuck until the arbor lock snaps into place. Hold the locking pin down.

  3. 3

    Locate the adjustment screw on the end of the sanding drum. Tightening the screw expands the drum, and loosening the screw allows the drum to contract. Use the flat tip screwdriver to loosen the screw until the sanding collar turns freely on the drum.

  4. 4

    Remove the used sanding collar by pulling it straight out and off the drum. Fit a new sanding collar of either of the three grit types by slipping one of the open ends of the collar over the drum.

  5. 5

    Hold the new drum in place with a fingertip, and use the screwdriver to tighten the adjustment screw and expand the sanding drum. Tighten only until the band fits snugly.

  6. 6

    Release the arbor locking pin, and spin the shaft of the tool to make sure it turns freely.

Tips and warnings

  • If the adjustment screw jams and the sanding drum shaft spins in the collet chuck during the adjustment process, tighten the chuck with the Dremel tool's wrench and try again.
  • Change the sanding collars before the grit wears away. If patches of backing become exposed, the collars leave scorch marks and create even more cleanup work.
  • Don't over tighten the sanding drum. Too much compression may distort the drum and cause the sanding band to wear unevenly. At high speeds, this may unbalance the drum and cause severe vibrations.

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