2016-10-31 (M) Clockwork Theremin

A hole was drilled in the largest gear. This was slightly unsettling as it was anytime a potentially dangerous modification was made to a part which had already taken a lot of time to create. The hole was 5/16” (8mm) and meant to accept a bolt of that size. This shaft would be affixed to the gear and allowed to rotate freely.

5/16" (8mm) hole drilled in largest gear

A bolt and fender washers were installed on the gear. The fender washers were probably not necessary, ordinary washers would probably suffice, but the addition of reflective metal seemed like a nice touch.

Bolt fastening gear

Bearings were installed into the printed bearing holders. Due to some printer problems these prints had to be sanded in order to make room for the bearings. To get them into place it was necessary to insert a 5/16” (8mm) bolt through the bearings and holder then tighten nuts on either side until the bearings were seated and aligned.

Bearing holders with bearings

The hole cut for the 600mm gear was filled with a bearing holder. Some minor sanding was required to get the holder to fit but it was secure. 3/16” (5mm) holes were drilled through the bearing holder and board. This may not have been necessary since the holder was so tight but it seemed more practical to bolt them in place.

Bearing holder fastened to board

The gear was attached to the bearing holder and a nut was finger-tightened below the board for stability.  A few animated pictures were taken to illustrate the rotation of the gear. A second gear was placed on the board, not fastened, to demonstrate the interlocking teeth.

Gear freely spinning

Interlocking teeth

Parts list:

The rest of the posts for this project have been arranged by date.

First time here?

Completed projects from year 1.

Completed projects from year 2.

Completed projects from year 3.

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2016-10-26 (W)