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post #1 of 4 (permalink) Old 12-28-2010, 03:39 PM Thread Starter
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Unhappy Slowing Router Speed

I have a Hitachi M12VC Variable Speed Router, the RPM ranges from 8,000 to 24,000, but I want to slow the speed to between 50 and 100 RPM. Can anyone help me?
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post #2 of 4 (permalink) Old 12-28-2010, 04:27 PM
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Originally Posted by sammysam View Post
I have a Hitachi M12VC Variable Speed Router, the RPM ranges from 8,000 to 24,000, but I want to slow the speed to between 50 and 100 RPM. Can anyone help me?
Hi Sam - I don't think you can run a universal motor that slow without burning it up but I'll let the electrical types weigh in on that one. Might I inquire Why?

John Schaben

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post #3 of 4 (permalink) Old 01-03-2011, 03:54 AM Thread Starter
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I want to use it to cut a wire coil to make jump rings. For the materials I am using the best RPM is between 50 and 100. I know its possible with a variable speed drill press but I already have the router.
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post #4 of 4 (permalink) Old 01-03-2011, 08:03 AM
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Hi Sam:

John is quite right, running the motor at such a low speed (relative to its design speed) is likely to destroy the router motor. Various effects come into play when one reduces the speed of the motor.

For example, the motor usually has a fan to draw air through the motor, thereby expelling heat from the rotor. As the fan slows down, it draws less air through. Heat is still being generated. The rotor heats up. Heat destroys. The windings are likely to go first -- the insulation breaks down and the windings short out. Time to throw out the router and get another one.

For such low speeds as 50 to 100 rpm, one should be using something that "geared down" (using either pulleys or gears.) I would look to using either a drill press or a hand drill.

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