Sorter V2 Documentation

⚠ Under heavy construction

As of July 11, 2026, Sorter V2 is not yet in a position to be built.

The documentation that exists is incomplete. Any given page may be accurate, inaccurate, present only as an example, or badly out of date. We do not yet recommend that anyone attempt to build Sorter.

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Helpers — Timing pulley

Preparing the 20-tooth timing pulley

How-to guide

Remove the top flange from the 20-tooth timing pulley before assembly.

Author Abrianbaker

Contributor Spencer

Parts needed

Pulleys

  • 1×

Tools needed

  • Needle-nose pliers
  • Bottle opener, for extra leverage

The pulley arrives with a flange at each end. Only the top one comes off, and the lower one stays. Without that, the pulley does not fit inside the Interface spur gear.

Do this before the pulley goes on the NEMA 23 shaft, at the top interface.

20-tooth timing pulley before preparation, with the top flange attached
The pulley as it arrives. The top flange is the one to remove. Photo: Abrianbaker.

The flange lets go suddenly once it is pried far enough. Pry away from yourself and keep your face clear.

Remove the top flange

  1. Hold the body of the pulley in the needle-nose pliers.
  2. Get the edge of the bottle opener under the lip of the top flange.
  3. Pry a little, then move a short way around the circumference and pry again. Work all the way round rather than forcing one side.
  4. Keep going until the flange pops off. Set it aside; nothing else uses it.

The pliers alone will do it if you have no bottle opener: grip the flange and pry it upwards.

The finished result

The pulley with one flange left, at the bottom, and a clean open top.

20-tooth timing pulley after preparation, with the removed top flange beside it
The prepared pulley, with the flange that came off beside it. Photo: Abrianbaker.

It goes on the stepper shaft at the top interface.