Drive Sprockets Mods - Murrells Models

I found that the standard drive sprocket would not stay attached to the motor shaft,

no matter what I tried they would come lose so I had to redesign them.

Active-robot.com where selling this '6mm clamping D Hub'

You can get them from China etc. as well.

It's part number is something like 1309 series Sonic hub 6mm d bore.

Warprints have allowed me to publish the design.
Hetzer Sprocket metal insert.stl