The main measurements of the tapered roller bearings conform to DIN ISO 355 and DIN 720. Dimensional and Tapered Roller Bearing china running tolerances correspond to tolerance category 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 could be fitted independently of each additional. The bearings are supplied 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 surface of the steel (rolling contact surface area and roller mind). This microstructure helps preserve an oil film that is perfect for tapered roller bearing applications. Improved oil film retention considerably inhibits surface damage, attaining more than eight times higher toughness and equal or increased seizure resistance in comparison to conventional products.
Much better lubricant oil accumulation and retention (simpler to form oil film) in the roller surface plays a part in 10% lower friction in low speeds in comparison to conventional products.
Tapered roller bearings can accept 
substantial radial and axial loads. Axial loads will be absorbed in mere one route. For axial counter support another bearing attached inverse is required. Suitable for medium speeds.
Higher efficiency transmission systems are seen as key to enhancing gasoline economy, so NSK attempt to develop a substantial reliability bearing capable of overcoming these hurdles.
To boost fuel economy, there has been a change to using less lubricant and/or lessen viscosity lubricant in tranny systems. Due to this fact, tapered roller bearings in transmissions are being subject to increasingly severe lubrication conditions, increasing the risk of lubrication essential oil film depletion (lean lubrication conditions), surface harm, and bearing seizure.