Gears and Shafts
Gears/Shafts for Permco pumps and motors are cut in our own plant to extremely close tolerances.
Gear width tolerances are held to 0.0003" with backlash held to a minimum of 0.003" to 0.006". To prevent leakage caused by the common "crowning" effect, Permco shapes gears rather than hobbing and shaving them. This gives a true involute profile for the full length of each gear tooth, assuring maximum volumetric operation, no headaches with hand matched gear sets and longer operating time without rebuilding.