Ross' H015 Build

[r_saggio]

The wheels that are used on the original sentry droid are the standard VEX omni wheels.  To attach the wheel to the 6mm D-axle of the motor, I found hubs made for the motor and the fastener pattern matches the gaps between the wheel spokes.  To get the 4-40 bolts through the spokes, I had to lightly file the Vex wheel hub.  You only need to remove about .030" between each of the spokes. Don't file too deep. For the opposite side, I drilled out a large pan washer with the same pattern as the mount hub.  Also, I had to drill out the center of the Vex hub part of the way through with a 6mm (15/64) drill bit to allow the motor hun to fully engage the axle.

Motor Mount Hub: https://www.amazon.com/gp/product/B00B88...UTF8&psc=1

I also drilled a shallow dimple into the flat of the D-axle of the motor to help retain the set screw and to help prevent the hubs from slipping.