The main dimensions of the tapered roller bearings comply with DIN ISO 355 and DIN 720. Dimensional and running tolerances match tolerance course PN acc. to DIN 620. These tolerance classes are standard and are perfect for most applications.
The bearings are separable. This implies the bearing parts can be fitted independently of each different. The bearings are supplied without seals. They might 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 area and roller head). This microstructure helps retain an oil film that’s well suited for tapered roller bearing applications. Improved oil film retention considerably inhibits surface damage, attaining more than eight instances higher sturdiness and equal or increased seizure resistance compared to conventional products.
Improved upon lubricant oil accumulation and retention (better to form oil film) in the roller surface contributes to 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 path. For axial counter support another bearing attached inverse is required. Ideal for medium speeds.
Higher efficiency transmission systems are seen as key to bettering energy 
economy, so NSK set out to develop a substantial reliability bearing capable of overcoming these hurdles.
To improve fuel economy, there has been a change to using less lubricant and/or decrease viscosity lubricant in transmission systems. As a result, tapered roller bearings in transmissions are being at the mercy of increasingly severe lubrication conditions, increasing the chance of lubrication oil film depletion (lean lubrication circumstances), surface destruction, and bearing seizure.