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Re: How to create a direct drive for an AndyMark 0915 Motor (am-0912).
Why do you need 8k RPM? What kind of torque do you need from the motor? Directly driving the wheel may not be a good idea, make sure that the numbers say that this is the best solution
The output shaft on the AndyMark 9015 motor (am-0912) is 0.125 diameter. A "standard" 8 inch wheel has a 1.875 bolt circle (#10 bolts). The problem is, no one (that I know of) makes a hub that goes on a .125 shaft.
One possibility is to manufacture a bushing with a 0.125 (undersized if possible by 0.001) ID and a .500 OD. If you key the bushing on the outside with an ANSI keyway (1/8 for 0.500 OD), you could press the bushing onto the motor output shaft and fit a 500 Key Hub (am-0077) onto the bushing to mate with the wheel. One thing is that this bushing must be made perfectly, or the wheel will destroy the shaft.
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Nathan Hui
B.S. Electrical Engineering, UCSD '16
FRC 2473 (CHS Robotics), Team Captain '12
FTC 4950, 6038
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