Adopt well processed patented ring seal to reduce the leakage of the pump, the higher the working pressure, the closer the ring seal gets to the gear hub and the cover. It improves the sealing effect as well as the volumetric efficiency of the pump.

Distinguishing crowned roller bearing, which use outer ring crowning instead of roller crowning, not only adapts to the bending and deforming of the shaft, but also enlarge the contact area between the bearing and crown roller. This prolongs its life of at least 30%.

The patented thrust plates, through advanced structure design and special coating procession, have better anti-wearing out ability and longer lifespan.

During practical usage, there may be displacement between the spline bearing and inward spline on the housing, which causes the gear shaft interfered by radial force during working process and premature failure of thrust plate, ring seal, and shaft seal and directly decrease the lifespan of the bearing, signifying in oil leakage on the shaft, low efficiency, damage of the shaft spline etc. Permco’s products adopt outboard bearing structure according to customer’s request to prevent the above situation from happening and enlarge the products’ life cycle.