This is an 11 tooth steel gear. This gear fits onto the 9015 motor shaft so that the 9015 motor can mate with the PG27 gearbox. Specifications:
The 6mm diameter D -Shaft is made of stainless steel and is used throughout our building system as drive components. The D-Shaft profile is used with pulleys, gears and hubs when tightening the set screws and creating a non-slip connection.
Specifcation: