The main sizes of the tapered roller bearings conform to DIN ISO 355 and DIN 720. Dimensional and running tolerances correspond to tolerance course 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 could be fitted independently of each other. The bearings are provided without seals. They could 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 head). This microstructure helps maintain an oil film that is perfect for tapered roller bearing applications. Improved essential oil film retention substantially inhibits surface damage, obtaining more than eight times higher sturdiness and equal or greater seizure resistance in comparison to conventional products.
Much better 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 excessive radial and axial loads. Axial loads are absorbed in only one way. For axial counter support another bearing attached inverse is required. Ideal for medium speeds.
Larger efficiency transmission systems have emerged as key to bettering gasoline economy, so NSK set out to develop a substantial reliability bearing with the capacity of overcoming these hurdles.
To improve fuel economy, there’s been a shift to using less lubricant and/or cheaper viscosity lubricant in transmission systems. Therefore, tapered roller bearings in transmissions happen to be being at the mercy of increasingly severe lubrication circumstances, increasing the risk of lubrication essential oil film depletion (lean lubrication circumstances), surface damage, and bearing seizure.