These large ATR wheels are 6.75" in diameter. They come as pair since they have directional tread. This item also includes a custom machine hex shaft that locks into the wheel hub and a mounting bolt. The shaft also comes with a bearing that mounts into the large gear motor housing and the standard gear motor housing. These are also used in our 2nd generation ATR frames too. Also included are shaft collars for locking the wheel in place and onto the motor.
Because these wheels are larger in diameter, you robot will run faster, but have less power. These wheels work great with all our gear motors. The IG32 smaller motors will struggle a little, our IG32P medium motors work great, and with the our IG42 largest gear motors they will climb virtually anything. 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. If you order our large IG42 gear motor that has a 8mm shaft you will need to enlarge the hole to 8mm. These shafts are made to order and may require a 1-2 business days before shipment.
The Pair of wheels include the following:
- (1) Pair 6.75 Wheels
- (2) Custom Made Shafts with hex drive matched for wheels
- (2) 1/2"ID sealed bearings
- (2) 1/2"ID shaft collars
- (2) Set Screws
- (2) Bolts for Mounting the Tires to the Shaft
