Making a ball mill from a sewing machine motor, a broom stick and some scrap wood. there doesn't seem to be any proper ball mill instructables on the site, all drill based temporary solutions, so I figured there needed to be one.

I'm using 18mm MDF as that's what I had laying around

1 x dimmer switch

1 x sewing machine motor

1 x old computer cable

2 x connector blocks

and a bunch of screws

Step 1: rollers

so I cut some broom stick to 30cm long each and drilled a pilot hole in the middle at each end then put a screw in each end and cut the head off leaving about 1cm of screw poking out, this will be the axel for the rollers.

If I had of thought about it a bit more I should have used round nails but hey too late now.

On one roller I need to form a indent for the drive band of the sewing machine motor to sit, this will stop it moving up and down the roller. to do this I used my drill as a make shift lathe, and just pleased a round file on the stick until the groove was at the right depth.
Good work!
thank you very much, only made it today, so havnt had a chance to run it in properly yet.

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Bio: One day I shall own a Delorean.
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