Taper roller bearings
Though unitized hubs are more and more common with each new generation of vehicles (see chart above), taper roller bearings without integrated seals are still prevalent in the aftermarket. Y&F offers a wide range of tapers with pressed steel cages, manufactured to rigorous quality standards in both metric and inch sizes. With low cross sections and precise contact angles, these wheel bearings are designed to accommodate axial and radial loads when mounted with proper clearance.

Hub Bearing Unit 1–ABS/TCS
Based on a double row angular contact ball bearing, HUB1 is optimized for the special operating characteristics encountered on car wheel applications. The unit offers specific support the moment load is applied to the bearing during cornering. The main components, an outer ring and two inner rings, are matched with the ball set to give the correct clearance. The cages for the two ball rows are made from glass fiber reinforced polyamide. HUB1 is greased and sealed for life. Used mainly for driven wheels, HUB1 is also found in integral drum designs on the non-driven wheels of smaller cars. With assembly space at a premium, the very compact taper units (HUB1Ts) are often selected.

Hub Bearing Unit 2–ABS/TCS
Designed with the experience gained with HUB1, HUB2 has an outer ring with an integral flange, replacing the function of a separate hub. The flanged outer ring is designed as a lightweight structural component; outer ring raceways are induction hardened for bearing performance. The flange is tough, with threaded holes or studs and a spigot to center and mount brake and wheel. The dimensions of the flange and spigot are to customer requirements. HUB2 is typically used with a rotating outer ring for non-driven front or rear wheels.

Hub Bearing Unit 3 – ABS/TCS

The third-generation hub bearing units carry a flange for wheel and brake rotor attachment and a second flange for fixing the unit to the suspension. This fully integrated system provides a significant simplification in corner design and handling when compared with more traditional designs. The dynamic load carrying capacity is maximized by the use of a separate inner ring for the inboard ball row. This ring is mounted with an interference fit. The outer ring flange is bolted to the suspension. The rotating inner ring, with its tough flange, spigot and threaded holes or studs, is designed for mounting of the brake and wheel. HUB3 is greased and sealed for life, and used for both driven and non-driven wheel applications. For driven wheel applications, torque is transmitted to the inner ring via an involute spline. potential future “0” run out and imbalance as well as integration of a Metal Matrix Composite drum.