The main dimensions of the tapered roller bearings comply with DIN ISO 355 and DIN 720. 
Dimensional and running tolerances correspond to tolerance category PN acc. to DIN 620. These tolerance classes are standard and are perfect for most applications.
The bearings are separable. This means the bearing parts could be fitted independently of each additional. 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 surface of the steel (rolling contact surface area and roller mind). This microstructure helps keep an oil film that’s perfect for tapered roller bearing applications. Improved essential oil film retention significantly inhibits surface damage, reaching more than eight occasions higher strength and equal or increased seizure resistance in comparison to conventional products.
Improved lubricant oil accumulation and retention (simpler to form oil film) in the roller surface plays a part in 10% lower friction by low speeds compared to conventional products.
Tapered roller bearings may accept great radial and axial loads. Axial loads will be absorbed in only one route. For axial counter support a second bearing installed inverse is required. Ideal for medium speeds.
Bigger efficiency transmission systems have emerged as key to increasing gasoline economy, so NSK set out to develop a substantial reliability bearing capable of overcoming these hurdles.
To improve fuel economy, there has been a shift to using less lubricant and/or decrease viscosity lubricant in tranny systems. As a result, tapered roller bearings in transmissions are being at the mercy of increasingly severe lubrication conditions, increasing the risk of lubrication oil film depletion (lean lubrication conditions), surface destruction, and bearing seizure.