The main sizes of the tapered roller bearings comply with DIN ISO 355 and DIN 720. Dimensional and running tolerances correspond to tolerance class PN acc. to DIN 620. These tolerance Tapered Roller Bearing china classes are standard and are perfect for most applications.
The bearings are separable. This means the bearing parts can be fitted independently of each other. 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 top of steel (rolling contact surface and roller head). This microstructure helps retain an oil film that’s well suited for tapered roller bearing applications. Improved essential oil film retention considerably inhibits surface damage, reaching more than eight moments higher toughness and equal or increased seizure resistance compared 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 by low speeds compared to conventional products.
Tapered roller bearings can accept great radial and axial loads. Axial loads happen to be absorbed in only one way. For axial counter support another bearing attached inverse is required. Ideal for medium speeds.
Bigger efficiency transmission systems are seen as key to increasing petrol economy, so NSK attempt to develop a high reliability bearing capable of overcoming these hurdles.
To boost fuel economy, there’s been a change to using less lubricant and/or lessen viscosity lubricant in transmitting systems. Therefore, tapered roller bearings in transmissions happen to be being subject to increasingly severe lubrication circumstances, increasing the chance of lubrication oil film depletion (lean lubrication conditions), surface destruction, and bearing seizure.