The main measurements of the tapered roller bearings comply with DIN ISO 355 and DIN 720. Dimensional and running tolerances match tolerance course PN acc. to DIN 620. These tolerance classes are standard and are well suited for most applications.
The bearings are separable. This implies the bearing parts can be fitted independently of each various other. The bearings are provided without seals. They may 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 area and roller brain). This microstructure helps maintain an oil film that’s perfect for tapered roller bearing applications. Improved essential oil film retention drastically inhibits surface damage, reaching more than eight situations higher durability and equal or increased seizure resistance in comparison to conventional products.
Much better lubricant oil accumulation and retention (easier to form oil film) in the roller surface contributes to 10% lower friction for low speeds in comparison to conventional products.
Tapered roller bearings can accept excessive radial and axial loads. Axial loads will be absorbed in mere one course. For axial counter support a second bearing installed inverse is required. Suitable for medium speeds.
Larger efficiency transmission systems are seen as key to improving gas economy, so NSK attempt to develop a huge reliability bearing capable of overcoming these hurdles.
To boost fuel economy, there has been a shift to using less lubricant and/or reduced viscosity lubricant in tranny systems. Therefore, tapered roller bearings in transmissions will be being at the mercy of increasingly severe lubrication conditions, increasing the 
risk of lubrication essential oil film depletion (lean lubrication conditions), surface harm, and bearing seizure.