EQTF (Extra Quality Tough Ball Bearings For Transmissions) are bearings developed with balls made of special steel characterized by better wear protection through case hardening (carbonitriding) the surface and by adding hard silicon nitride particles within the steel. But the secret of their success does not lie in just applying the technology to existing applications.
Ultra high-speed needle bearing for planetary pinion gear side
Press connect method for a lightweight design
No backlash in spline joints
Stick slip noise: Controllable (Low pressure on the contact area between hub bearings and CVJ)
Ring material is bearing steel (stamping)
Top cover, spring seat and cage material is polyamide+glass fiber
High durability in severe environment
NTN Fixed Type CVJ "CFJ"
CVJs suffer from a greater torque loss ratio as the operating angle increases, however the developed product uses a proprietary spherical cross groove structure to drastically reduce internal frictional forces and decrease the torque loss ratio over a wide range of operating angles.
A reduction in temperature increases at high rotational speeds also allows it to be used for propeller shafts.