The main dimensions of the tapered roller bearings comply with DIN ISO 355 and DIN 720. Dimensional and running tolerances correspond to tolerance course PN acc. to DIN 620. These tolerance classes are standard and are perfect for most applications.
The bearings are separable. This implies the bearing parts could be fitted independently of each various other. The bearings are provided without seals. They may be lubricated with grease or oil from the side.
The rollers are processed to create pore-like micro indents in the top of steel (rolling contact surface area and roller mind). This microstructure helps keep an oil film that is perfect for tapered roller bearing applications. Improved essential oil film retention drastically inhibits surface 
damage, reaching more than eight situations higher toughness and equal or increased seizure resistance in comparison to conventional products.
Improved lubricant oil accumulation and retention (easier to form oil film) in the roller surface plays a part in 10% lower friction for low speeds in comparison to conventional products.
Tapered roller bearings may accept excessive radial and axial loads. Axial loads happen to be absorbed in only one course. For axial counter support another bearing installed inverse is required. Suitable for medium speeds.
Higher efficiency transmission systems are seen as key to improving gasoline economy, so NSK attempt to develop a excessive reliability bearing with the capacity of overcoming these hurdles.
To improve fuel economy, there has been a shift to using less lubricant and/or cheaper viscosity lubricant in transmission systems. As a result, tapered roller bearings in transmissions are being subject to increasingly severe lubrication conditions, increasing the chance of lubrication oil film depletion (lean lubrication circumstances), surface damage, and bearing seizure.