The main dimensions of the tapered roller bearings comply with DIN ISO 355 and DIN 720. Dimensional and running tolerances correspond to tolerance school PN acc. to DIN 
620. These tolerance classes are standard and so are perfect for most applications.
The bearings are separable. This means the bearing parts can be fitted independently of every other. The bearings are supplied without seals. They could be lubricated with grease or essential oil from the side.
The rollers are processed to create pore-like micro indents in the top of steel (rolling contact surface and roller head). This microstructure helps retain an oil film that’s well suited for tapered roller bearing applications. Improved essential oil film retention substantially inhibits surface damage, attaining more than eight circumstances higher durability and equal or higher seizure resistance in comparison to conventional products.
Improved Tapered Roller Bearing china lubricant oil accumulation and retention (easier to form oil film) in the roller surface contributes to 10% lower friction by low speeds compared to conventional products.
Tapered roller bearings may accept excessive radial and axial loads. Axial loads are absorbed in only one way. For axial counter support a second bearing installed inverse is required. Suitable for medium speeds.
Higher efficiency transmission systems are seen as key to bettering fuel economy, so NSK set out to develop a excessive reliability bearing capable of overcoming these hurdles.
To boost fuel economy, there has been a shift to using less lubricant and/or decrease viscosity lubricant in transmitting systems. Therefore, tapered roller bearings in transmissions will be being subject to increasingly severe lubrication conditions, increasing the chance of lubrication essential oil film depletion (lean lubrication conditions), surface harm, and bearing seizure.