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Reply by Loren

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Posted on Delta Jointer

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Loren

10477 posts in 4034 days


#1 posted 10-10-2017 06:12 AM

First thing is you have to look at the motor
plate to see what the rpm is.

Then find the circumference of each pulley.
It’s 3.14 x r(2). A 7” pulley is about 21”
circumference. Figure out how many revolutions
the smaller pulley travels per revolution
of the larger one and multiply times the rpm
of the motor. That will give you the cutterhead
rpm.

You want the cutterhead to spin about 5000
rpm on a 3-knife jointer.


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