The main measurements of the tapered roller bearings conform to DIN ISO 355 and DIN 720. Dimensional and running tolerances correspond to tolerance class PN acc. to DIN 620. These tolerance classes are standard and so are well suited for most applications.

The bearings are separable. This implies the bearing parts can be fitted independently of every different. The bearings are supplied without seals. They may 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 and roller head). This microstructure helps keep an oil film that’s well suited for tapered roller bearing applications. Improved oil film retention significantly inhibits surface damage, obtaining more than eight situations higher toughness and equal or better seizure resistance in comparison to conventional products.
Superior lubricant oil accumulation and retention (better to form oil film) in the roller surface plays a part in 10% lower friction at low speeds in comparison to conventional products.
Tapered roller bearings may accept huge radial and axial loads. Axial loads happen to be absorbed in mere one way. For axial counter support a second bearing installed inverse is required. Suitable for medium speeds.

Larger efficiency transmission systems have emerged as key to bettering gas economy, so NSK set out to develop a substantial reliability bearing with the capacity of overcoming these hurdles.

To improve fuel economy, there has been a change to using less lubricant and/or reduced viscosity lubricant in tranny systems. Consequently, tapered roller bearings in transmissions will be being at the mercy of increasingly severe lubrication conditions, increasing the risk of lubrication essential oil film depletion (lean lubrication conditions), surface destruction, and bearing seizure.