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Spur and Helical Gear Horsepower Calculator






























You can enter your own Ultimate Tensile Strength.
(Safe stress can be taken as 1/3 of the ultimate strength.)
See Matweb.com for ultimate strength values.
*Special Considerations need to be taken if the Pitch Line VELOCITY exceeds: 1200 FPM for Metallic Spur Gears Or 2400 FPM for Helical Gears or Nonmetallic Spur gears