[4]

Pulley/rpm

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Mutt

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Motor 3450 rpm 3" pulley
driven tool 4" pulley
so that would be about 2587 rpm for the driven tool? Is this right?
 

P. Waller

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Correct
3 X PI = 9.4
4 X Pi = 12.5

.94 / 12.5 = .752 a ratio of 1:.752
3450 X ,752 = 2594
 

tjb

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It's simpler than that. The pi's cancel, so it's just 3/4, or .75.
 
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