The Pololu 1418 is a Zumo chassis unit kit that is a small tracked robot platform with a width of less than 10cm from side to side, allowing it to qualify for Mini Sumo competitions.
The main body is composed of black ABS and features a compartment for four AA batteries and sockets for two micro metal gearmotors.
The kit comes with two silicone tracks, two drive and two idler sprockets, a 1/16″ acrylic mounting plate, and mounting hardware. (Motors and batteries are not included.)
The ideal motors for your robot depend on your desired torque, speed, and current draw, so motors are not included with the chassis.
If you have limited ability to supply current, we recommend using lower-power non-HP motors, which have a stall current of 360 mA at 6 V; if you have the ability to deliver more current, the HP micro metal gearmotors offer more torque and speed for the same gear ratio.
We recommend the 50:1, 75:1, or 100:1 HP or non-HP motors for use with this chassis, but 30:1 micro metal gearmotors might also work. Note that non-HP 30:1 motors do not offer much torque, so they are not very practical for sumobots, and 30:1 HP motors will make the robot extremely fast and difficult to control.
Micro Metal Speed Top Zumo Speed Stall Torque Stall Current
Gearmotor @ 6V @ 6V @ 6V @ 6V
| 100:1 HP | 320 RPM | 25 in/s (65 cm/s) | 30 oz·in | 1600 mA |
| 75:1 HP | 400 RPM | 32 in/s (80 cm/s) | 22 oz·in | 1600 mA |
| 50:1 HP | 625 RPM | 50 in/s (130 cm/s) | 15 oz·in | 1600 mA |
| 30:1 HP | 1000 RPM | 80 in/s (200 cm/s) | 9 oz·in | 1600 mA |
| 100:1 | 120 RPM | 10 in/s (25 cm/s) | 12 oz·in | 360 mA |
| 75:1 | 170 RPM | 14 in/s (35 cm/s) | 9 oz·in | 360 mA |
| 50:1 | 250 RPM | 20 in/s (50 cm/s) | 7 oz·in | 360 mA |
| 30:1 | 440 RPM | 35 in/s (90 cm/s) | 4 oz·in | 360 mA |
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