The main dimensions of the tapered roller bearings conform to DIN ISO 355 and DIN 720. Dimensional and running tolerances match tolerance course PN acc. to DIN 620. These tolerance classes are standard and are well suited for most applications.
The bearings are separable. This means the bearing parts can be fitted independently of each different. The bearings are provided without seals. They are often lubricated with grease or oil from the side.
The rollers are processed to create pore-like micro indents in the surface of the steel (rolling contact surface and roller mind). This microstructure helps maintain an oil film that’s well suited for tapered roller bearing applications. Improved essential oil film retention drastically inhibits surface damage, reaching more than eight circumstances higher strength and equal or higher seizure resistance in comparison to conventional products.
Much better lubricant oil accumulation and retention (simpler to form oil film) 
in the roller surface contributes to 10% lower friction by low speeds in comparison to conventional products.
Tapered roller bearings may accept large radial and axial loads. Axial loads will be absorbed in mere one route. For axial counter support another bearing mounted inverse is required. Suitable for medium speeds.
Larger efficiency transmission systems are seen as key to enhancing fuel economy, so NSK set out to develop a great reliability bearing capable of overcoming these hurdles.
To boost fuel economy, there has been a change to using less lubricant and/or cheaper viscosity lubricant in transmitting systems. Due to this fact, tapered roller bearings in transmissions will be being at the mercy of increasingly severe lubrication conditions, increasing the risk of lubrication essential oil film depletion (lean lubrication circumstances), surface damage, and bearing seizure.