The main measurements of the tapered roller bearings comply with DIN ISO 355 and DIN 720. Dimensional and running tolerances match tolerance category PN acc. to DIN 620. These tolerance classes are standard and are well suited for most applications.
The bearings are separable. This implies the bearing parts could be fitted independently of each other. The bearings are supplied without seals. They might be lubricated with grease or essential 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 head). This microstructure helps maintain an oil film that is well suited for tapered roller bearing applications. Improved essential oil film retention substantially inhibits surface damage, obtaining 
more than eight instances higher strength 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 at low speeds compared to conventional products.
Tapered roller bearings can accept substantial radial and axial loads. Axial loads happen to be absorbed in mere one course. For axial counter support another bearing attached inverse is required. Ideal for medium speeds.
Higher efficiency transmission systems have emerged as key to increasing energy economy, so NSK attempt to develop a excessive reliability bearing capable of overcoming these hurdles.
To boost fuel economy, there’s been a shift to using less lubricant and/or decrease viscosity lubricant in transmission systems. Because of this, tapered roller bearings in transmissions will be being at the mercy of increasingly severe lubrication circumstances, increasing the chance of lubrication essential oil film depletion (lean lubrication conditions), surface harm, and bearing seizure.