The main measurements of the tapered roller bearings comply with DIN ISO 355 and DIN 720. Dimensional and running tolerances correspond to tolerance class PN acc. to DIN 620. These tolerance classes are Tapered Roller Bearing china standard and are well suited for most applications.
The bearings are separable. This means the bearing parts could be fitted independently of each other. The bearings are supplied without seals. They could 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 
Superior lubricant oil accumulation and retention (simpler to form oil film) in the roller surface contributes to 10% lower friction at low speeds compared to conventional products.
Tapered roller bearings can accept substantial radial and axial loads. Axial loads are absorbed in mere one path. For axial counter support another bearing attached inverse is required. Suitable for medium speeds.
Larger efficiency transmission systems have emerged as key to bettering fuel economy, so NSK attempt to develop a high reliability bearing with the capacity of overcoming these hurdles.
To improve fuel economy, there has been a shift to using less lubricant and/or lessen viscosity lubricant in transmission systems. Consequently, tapered roller bearings in transmissions will be being subject to increasingly severe lubrication circumstances, increasing the chance of lubrication essential oil film depletion (lean lubrication circumstances), surface destruction, and bearing seizure.