TRAKROL® bearings feature black oxide treated bearing steel. They utilize either a precision ball or tapered roller bearing insert for longer operating life under combination radial and thrust loads. The capacity for combination loads allows the TRAKROL® bearing to be available in plain (cylindrical), V-groove and flanged outside diameter in both stud and yoke styles. Small sizes less than 3 in outside diameter or point diameter use sealed ball bearing inserts. They also use a NYLAPLATE® seal for additional protection. Stud type configurations utilize a metal end plug seal on the roller face providing a long lasting seal. Both bearing types provide a large internal grease reservoir along with special sealing. This makes TRAKROL® bearings an excellent choice where reduced maintenance is required.