The main measurements of the tapered roller bearings conform to DIN ISO 355 and DIN 720. Dimensional and running tolerances match tolerance course 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 can be fitted independently of each 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 top of steel (rolling contact surface and roller head). This microstructure helps preserve an oil film that is well suited for tapered roller bearing applications. Improved essential oil film retention drastically inhibits surface damage, reaching more than eight situations higher sturdiness and equal or higher seizure resistance in comparison to conventional products.
Increased lubricant oil accumulation and retention (better to form oil film) in the roller surface contributes to 10% lower friction for low speeds compared to conventional products.
Tapered roller bearings can accept high radial and axial loads. Axial loads happen to be absorbed in mere one direction. For axial counter support a second bearing installed inverse is required. Suitable for medium speeds.
Higher efficiency transmission systems are seen as key to increasing fuel economy, so NSK attempt to develop a substantial reliability bearing capable of overcoming these hurdles.
To boost fuel economy, there’s been a change to using less lubricant and/or lessen viscosity lubricant in transmission systems. Subsequently, tapered roller bearings in transmissions will be being at the mercy of increasingly severe lubrication conditions, increasing the chance of lubrication essential oil film depletion (lean 
lubrication circumstances), surface destruction, and bearing seizure.