The main sizes of the tapered roller bearings comply with 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 are perfect for most applications.
The bearings are separable. This means the bearing parts could be fitted independently of each other. The bearings are supplied 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 surface and roller head). This microstructure helps preserve an oil film that is perfect for tapered roller bearing applications. Improved oil film retention drastically inhibits surface damage, achieving more than eight instances higher toughness and equal or higher seizure resistance in comparison to conventional products.
Improved upon lubricant oil accumulation and retention (simpler to form oil film) in the roller surface plays a part in 10% lower friction by low speeds in comparison to conventional products.
Tapered roller bearings can accept excessive radial and axial loads. Axial loads are absorbed in mere 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 enhancing energy economy, so NSK attempt to develop a great reliability bearing with the capacity of overcoming these hurdles.
To boost fuel economy, there has been a change to using less lubricant and/or lower viscosity lubricant in transmitting systems. Due to this fact, tapered roller bearings in transmissions will be being at the mercy of increasingly severe lubrication conditions, increasing the risk of lubrication oil film depletion (lean lubrication conditions), surface destruction, and bearing seizure.