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Belt-Drive Pulleys

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  1. This basic calculator allows you to quickly determine the required pulley diameters for a required output rpm.
  2. DH is the high speed pulley diameter, DL is the low speed pulley diameter, NH is the high speed rpm, and NL is the low speed rpm.
  3. Note: The high speed pulley will always the smaller of the two diameters.

Calculator


Input 3 of 4 variables to solve for the unknown.Help
SymbolVariableInputUnits
DHHigh Speed Pulley Diameter
DLLow Speed Pulley Diameter
NLLow Speed RPM
NHHigh Speed RPM