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  1. S

    planetary gear geometry query!

    Hi, memory loss is my excuse for having lost the answer Miles gave to this last year. Using Bosch starter planetary ring of 47 teeth, carrier planets have 16 teeth. I think Miles said 15 or 14 teeth on the sun. Computer blew up with his answer saved on it. The OD of the planets is 13.2mm. OD =...
  2. S

    planetary gear geometry query!

    If someone has any insight on this situation and can help out, I would be very grateful. I have tried to put together a planetary gearbox using a spare parts set for a big Bosch drill, just the ring and 4 planet spur gears. I calculated the PCD and 0.75 mod needed for the sun gear on the motor...
  3. S

    Lynch motor how it works

    So how does this configuration achieve the translation from low number of turns into low rpm? I wonder if someone really knowledgeable on the physics of motors can explain why this configuration works in the 3000rpm range. Having dismantled motors from the age of 6 and built and rewound many...
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