Datasheet

RB-Pol-138
Lego Compatible Shaft / Axle Connector Pair (3mm)
This adapter makes it possible to use LEGO wheels with 3mm hexagonal shafts, like the ones found on
many Tamiya gearboxes. These are great, inexpensive gearboxes for building small robots, and LEGO
makes a number of very high-quality wheels as part of their Technic and Mindstorms product lines,
many of which would also be excellent for use on a small robot. With this adapter, you can integrate
LEGO wheels of your choice into a robot. We sell the adapters in pairs, so that you can make a two-
wheeled robot.
Instructions
1. Fit the adapter onto the hexagonal metal shaft. You will need to push quite hard; be careful not
to damage the shaft or gearbox.
2. Slide the adapter into a LEGO wheel of your choice.
The adapter fits very tightly on the metal shaft, so that it will remain attached to the shaft when the
wheel is removed. We recommend that you leave the adapter permanently attached to the metal axle;
repeated removal and insertion may loosen the connection, making it more likely to fall off.