The main measurements of the tapered roller bearings conform to DIN ISO 355 and DIN 720. Dimensional and running tolerances correspond to tolerance school 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 every 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 area and roller brain). This microstructure helps maintain an oil film that’s perfect for tapered roller bearing applications. Improved oil film retention significantly inhibits surface damage, obtaining more than eight times higher toughness and equal or better seizure resistance compared to conventional products.
Increased 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 huge radial and axial loads. Axial loads will be absorbed in mere one direction. For axial counter support another bearing mounted inverse is required. Suitable for medium speeds.
Higher efficiency transmission systems are seen as key to improving petrol economy, so NSK set out to develop a high reliability bearing with the capacity of overcoming these hurdles.
To improve fuel economy, there’s been a change to using less lubricant and/or reduced viscosity lubricant in tranny systems. Because of this, tapered roller bearings in Tapered Roller Bearing china transmissions will be being subject to increasingly severe lubrication conditions, increasing the risk of lubrication essential oil film depletion (lean lubrication conditions), surface damage, and bearing seizure.