Gearbox Ratio Calculator
Motor Speed =
Machine Spd =
Roll Diameter =
Gearbox Ratio =
Roll Speed =
Computes the Gearbox Ratio for a given roll based on the Motor Gear-in Speed, Machine Line Speed and Machine Roll Diameter. Also, computes Machine Roll Speed based on the Motor Gear-in Speed and the computed Gearbox Ratio.
- Motor Speed: in revs per minute
- Machine Speed: in feet per minute
- Roll Diameter: in inches
- Gearbox Ratio: Dimensionless
- Roll Speed: in revs per minute
Contributed by Jerry Meyer.
A paper machine will be driven by 1200 rpm motors and the machine speed will be 3500 fpm. Calculate the gearbox ratio for a 40.16 inch diameter roll.