This is a ANSI #40 sprocket that is custom bored to 17mm fit our wheelchair motors. We use these in most of our chain driven robots with wheelchair motors. It is made of steel and comes with two set screws that fix it in place on the shaft. It also has a 6mm keyway that fits the key on the motor shaft.
This is a custom part. Please allow 2-4 days for shipping.
With it's wide hub and finished bore, this steel roller chain sprocket is ready to mount to a shaft.
SparkFun's minimal design approach to Arduino. This is a 5V Arduino running the 16MHz bootloader.
Ready to ship prebuilt tracked platform with DeWalt battery adapter. This lightweight platform uses IG42 122 RPM motors, all-terrain tracks, and an RC control system. Powered by standard DeWalt batteries for ease of use.