Japan's NTN (NTN) has developed for the transmission of the open lower deep groove ball bearings. Set by the cage pocket holes will spray lubrication friction than the standard deep groove ball bearing-type decreased by 25%.
plain bearing Gearbox oil seal in the bearing and shaft is different from allowing a small amount of oil, but most of them with to prevent wear debris into the seal. NTN short driving distance for motorcycles and some cars and other less stringent requirements for durability purposes,brass bushing to market open without sealing products. Recently appeared bearing lubrication methods from the "oil bath"to"spray lubrication"conversion trend. Spray lubrication can reduce the transmission of oil, stirring to reduce the resistance. Open the side of the hollow shape, oil mist can enter, and is therefore a good affinity spray lubrication.
Cage is the use of rivets to paste together two pieces of metal sheet material made ??riveting. In ordinary products, and the cage rotor position closer to the majority of wide intervals, in this part of the oil of the shear resistance will become large. The NTN products on display as part of the cage through the pocket holes formed on the tank set, and to turn the body and keep a distance from the cage, reducing the shear resistance.
Pockets in the time stamping of sheet metal forming parts. Since only changed the shape of the mold did not increase the number of processes, so the cost increase will not be too much. Because it is metal forming, so the outside of the cage to form the same with Pockets bulging.