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

The bearings are separable. This means the bearing parts can be fitted independently of every other. 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 area and roller brain). 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 durability and equal or greater seizure resistance in comparison to conventional products.
Better lubricant oil accumulation and retention (better to form oil film) in the roller surface plays a part in 10% lower friction in low speeds in comparison to conventional products.
Tapered roller bearings can accept large radial and axial loads. Axial loads are absorbed in mere one way. For axial counter support a second bearing installed inverse is required. Ideal for medium speeds.

Higher efficiency transmission systems have emerged as key to improving fuel economy, so NSK set out to develop a large reliability bearing capable of overcoming these hurdles.

To boost fuel economy, there’s been a shift to using less lubricant and/or lessen viscosity lubricant in transmission systems. Due to this fact, tapered roller bearings in transmissions are being at the mercy of increasingly severe lubrication conditions, increasing the risk of lubrication oil film depletion (lean lubrication conditions), surface harm, and bearing seizure.