Gear Oil Viscosity Calculator

We often have gear boxes where the correct viscosity gear oil is not known either because it is a used box and came without the manual, or it is now being used in a different setup from its original design.

This calculator can be used to determine the right viscosity for the gear box with under the conditions we determine. This provides a starting point. The viscosity can be modified slightly up or down until you have the reducer working at its lowest temperature.

To use the calculator:

• Select the type of lubrication: Splash or circulation
• Select the type of reduction: Simple or multiple
• Select the horsepower range
• Select the speed