The main measurements of the tapered roller bearings conform to DIN ISO 355 and DIN 720. Dimensional and running tolerances match tolerance course PN acc. to DIN 620. These tolerance classes are standard and so 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 essential oil from the side.
The rollers are processed to create pore-like micro indents in the surface of the steel (rolling contact surface area and roller head). This microstructure helps retain an oil film that is perfect for tapered roller bearing applications. Improved oil film retention drastically inhibits surface damage, attaining more than eight situations higher strength and equal or better seizure resistance in comparison to conventional products.
Better lubricant oil accumulation and retention (simpler to form oil film) in the roller surface plays a part in 10% lower friction in low speeds in comparison to conventional products.
Tapered roller bearings can accept large radial and axial loads. Axial loads are absorbed in only one course. For axial counter support another bearing mounted inverse is required. Suitable for medium speeds.
Higher efficiency transmission systems are seen as key to bettering fuel economy, so NSK set out to develop a high reliability bearing capable of overcoming these hurdles.
To improve fuel economy, there has been a shift to using less lubricant and/or decrease viscosity lubricant in tranny systems. Subsequently, tapered roller bearings in transmissions will be being subject to increasingly severe lubrication conditions, increasing the risk of lubrication essential oil film depletion (lean lubrication circumstances), surface harm, and bearing seizure.