These ATR wheels are 6 inches in diameter and come as pair. They are solid core foam rubber to handle high loads. This item also includes a custom machined shaft with a welded hub that matches the bolt pattern of the wheel. The shaft is 5/8" in diameter and has a 6mm bore to accept a motor D shaft. A set screw is provided to lock the shaft to the motor.
These wheels work great with our gear motors. The 6mm bore shafts work with the IG32 and IG32P motors. The smaller IG32 motors will struggle a little, our IG32P medium speed motors work great. To calculate the speed of the robot just take the output RPM * wheel diameter (in inches) * 3.14 / 12 = feet per minute.
The shaft is bored with a 6mm hole for mounting onto the IG32 gear motors.
These shafts are made to order and may require a 1-2 business days before shipment.
SparkFun's minimal design approach to Arduino. This is a 5V Arduino running the 16MHz bootloader.
900 MHz Rubber Duck Antenna - Male Type F