The main sizes of the tapered roller bearings conform to DIN ISO 355 and DIN 720. Dimensional and running tolerances match tolerance category PN acc. to DIN 620. These tolerance classes are standard and so are well suited for most applications.
The bearings are separable. This means the bearing parts could be fitted independently of every additional. The bearings are provided without seals. They can 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 brain). This microstructure helps maintain an oil film that’s perfect 
for tapered roller bearing applications. Improved essential oil film retention considerably inhibits surface damage, reaching more than eight times higher durability and equal or better seizure resistance in comparison to conventional products.
Improved lubricant oil accumulation and retention (better to form oil film) in the roller surface plays a part in 10% lower friction for low speeds compared to conventional products.
Tapered roller bearings can accept huge radial and axial loads. Axial loads will be absorbed in mere one way. For axial counter support another bearing installed inverse is required. Ideal for medium speeds.
Larger efficiency transmission systems have emerged as key to increasing petrol Tapered Roller Bearing china economy, so NSK attempt to develop a high reliability bearing capable of overcoming these hurdles.
To improve fuel economy, there has been a change to using less lubricant and/or lessen viscosity lubricant in transmitting systems. As a result, tapered roller bearings in transmissions happen to be being at the mercy of increasingly severe lubrication circumstances, increasing the risk of lubrication essential oil film depletion (lean lubrication circumstances), surface destruction, and bearing seizure.