Overview

This set contains components that are great for adding a tracked
drive system to a small robot or vehicle. It consists of:

• Two silicone tracks


• Two drive sprockets


• Two idler sprockets


• Two shoulder bolts, washers, and M3 nuts

The flexible one-piece silicone tracks are available in two lengths,
with either 22 teeth
or 30 teeth that are
designed to mesh with the drive and idler sprockets. The 22T set, with
an overall length under 90 mm, is short enough to be used as the
drive system for a mini-sumo robot (for example, our href="http://www.pololu.com/product/1418">Zumo chassis and href="http://www.pololu.com/product/2506">Zumo Robot for Arduino).

The drive sprockets are designed to press-fit securely on the output
shafts of our href="http://www.pololu.com/category/60/micro-metal-gearmotors">micro
metal gearmotors and 15.5D mm
metal gearmotors. These gearmotors are intended to be mounted onto
the side of the hub with the protruding teeth. The output shaft will
slide into the socket easily at first but will achieve a snug fit when
pressed through to the other edge of the hub.

The output shafts on the Solarbotics
metal gear motors will also fit these sprockets, but because they
are shorter they will have to be mounted onto the other side of the
sprocket where the fit is tighter. These sprockets will also work in
this orientation on href="http://www.pololu.com/category/56/pololu-plastic-gearmotors">Pololu
plastic gearmotors with 3mm D-shaft outputs.

Our extended micro
metal gearmotor bracket is specifically designed to work with these
hubs. Please note that the non-extended version of our mounting bracket
(product #989) will not work well with these hubs.