December 2, 2019

The main measurements of the tapered roller bearings comply with DIN ISO 355 and DIN 720. Dimensional and running tolerances correspond to tolerance category 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 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 and roller brain). This microstructure helps keep an oil film that’s well suited for tapered roller bearing applications. Improved essential oil film retention substantially inhibits surface damage, obtaining more than eight instances higher toughness and equal or increased seizure resistance compared to conventional products.
Improved upon lubricant oil accumulation and retention (better to form oil film) in the roller surface contributes to 10% lower friction in low speeds compared to conventional products.
Tapered roller bearings may accept large radial and axial loads. Axial loads are absorbed in only one route. For axial counter support a second bearing mounted inverse is required. Suitable for medium speeds.

Larger efficiency transmission systems are seen as key to increasing petrol economy, so NSK set out to develop a high reliability bearing capable of overcoming these hurdles.

To improve fuel economy, there’s been a change to using less lubricant and/or reduce viscosity lubricant in transmitting systems. As a result, tapered roller bearings in transmissions happen to be being at the mercy of increasingly severe lubrication conditions, increasing the Tapered Roller Bearing china chance of lubrication oil film depletion (lean lubrication conditions), surface harm, and bearing seizure.