The main measurements of the tapered roller bearings comply with DIN ISO 355 and DIN 720. Dimensional and running tolerances match tolerance class PN acc. to DIN 620. These tolerance classes are standard and so are perfect for most applications.
The bearings are separable. This implies the bearing parts can be fitted independently of each different. The bearings are provided 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 surface of the steel (rolling contact surface and roller brain). This microstructure helps maintain an oil film that is well suited for tapered roller bearing applications. Improved essential oil film retention considerably inhibits surface damage, attaining more than eight occasions higher toughness and equal or higher seizure resistance in comparison to conventional products.
Superior 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 can accept substantial radial and axial loads. Axial loads happen to be absorbed in mere one direction. For axial counter support a second bearing mounted inverse is required. Ideal for medium speeds.
Larger efficiency transmission systems have emerged as key to improving gasoline economy, so NSK attempt to develop a high 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 transmitting systems. Subsequently, tapered roller bearings in transmissions will be being subject to increasingly severe lubrication conditions, increasing the chance of lubrication oil film depletion (lean lubrication conditions), surface harm, and bearing seizure.
