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One end of the gearbox is an adapter that lets it fit the Mini-Ev. The mounting holes on this prototype needed drilling out a little larger
to be able to fit the M5 screws provided as the holes did not align perfectly with those on the motor. Correct alignment of the motor is still maintained as it actually is
the large centre hole that locates around the bearing housing on the motor.. |
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I machined four small cutouts on the side of the adapter that will allow air to enter the openings on the front of the motor. This should greatly
improve motor cooling. Ted Z suggested this on the forum and I think it would make a good improvement to the design of the adapter. As you can see an old drill press and a
milling cutter will do the job but not very neatly! |
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The gearbox is held together using four M3 x 35mm screws and they only have 3mm or so thread where they attach to the Adapter. I'm going to look
for some 40mm long ones to increase the engaged threads. |
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The shaft on the motor must be shortened by 3mm and I did this using my trusty Dremel Clone. The nice yellow duct tape keeps filings out of the
motor. |
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I pressed the gear onto the shaft using my bench vice. I was careful not to overdo it and bend the motor shaft. |
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I then did a trial assembly of the motor and gearbox. Everything fitted together nicely and ran smoothly when attached up to one of my 12v
Hawkers. The combo makes pretty nice package of a good big motor with a neat strong gearbox. it will be interesting to see how it performs in the finished bot. |
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