Tapered roller bearing

The geometry means that the tangential speeds of the surfaces of each of the rollers are the same as their raceways along the whole length of the contact patch and no differential scrubbing occurs.

They consisted of a cylindrical seat on the frame and part of the axle enclosed in a case or box that held a lubricant.

The tapered roller bearing in combination with modern lubricants is extremely durable and is used almost universally in applications involving rotating axle and transmission shafts.

Common real world applications are in agriculture, construction and mining equipment, sports robot combat, axle systems, gear box, engine motors and reducers, propeller shaft, railroad axle-box, differential, wind turbines, etc.

The bearing axis is where the projected lines of the raceway combine at a common location to improve rolling, while reducing friction.

They are commonly used in pairs for better radial load handling, and in some heavy duty applications, can be found in two or four rows combined in a single unit.

A single tapered roller bearing
Tapered roller bearings are based on the observation that cones that meet at a point can roll over each other without slipping. In practice, sections of cones are used.
Cutaway view of a tapered roller bearing