The main sizes of the tapered roller bearings comply with DIN ISO 355 and DIN 720. Dimensional and running tolerances match 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 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 area and roller head). This microstructure helps maintain an oil film that’s well suited for tapered roller bearing applications. Improved essential oil film retention substantially inhibits surface damage, reaching more than eight circumstances higher strength and equal or greater seizure resistance in comparison to conventional products.
Better Tapered Roller Bearing china lubricant oil accumulation and retention (simpler 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 high radial and axial loads. Axial loads will be absorbed in mere one course. 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 lower viscosity lubricant in transmission systems. Consequently, tapered roller bearings in transmissions happen to be being subject to increasingly severe lubrication circumstances, increasing the chance of lubrication oil film depletion (lean lubrication conditions), surface harm, and bearing seizure.