OUTPUT
The output of a worn wheel set is the greatest in normal working conditions with worm gear drive, proper lubrication with a load near the nominal level after adequate run-in.
The approximate output can be calculate with the following formula:

where T2 and P1 are the data taken from the power table.
When the wheel is drive and you have a reversed output rev. is always less than .
The following formula can be used to estimate the output:

Remember that during start up, the output is less than at low speed because friction robs energy.
The output lost generates heat. It is necessary to verify that the housing has adequate cooling properties.

LUBRICATION
Lubrication is generally bath type for the gears in order to splash oil also on the bearings.
Normally, the worm gear is towards the bottom with the oil level at the worm gear's axis. In other cases, we suggest an oil level sufficiently high so that lubricate reaches the gears.
When the worm gear rotates rapidly you must used forced lubrication.
The lubricant's viscosity must be chosen based on the worm gear's rpms (see the diagram).

LUBRICANT VISCOSITY CHOICE (SYNTHETIC OIL) Diagram valid for room temperatures from 10°C to 30°C.

For this reason, we recommend using a top-of-the-line product.
Oil viscosity, according to its ISO rating, is expressed in mm2/sec (cSt) of 40°C. See table.
Synthetic oil used in temperatures from -30°C to +100°C and after run in must be changed every 10,000 hours of operation.
Mineral oil with E.P. additives is generally used for temperatures from -10°C to +90°C. It must be changed after the first 500 hours of operation and every 5,000 hours after that.