ntn developed a new type of transmission and nsk cylindrical bearing characteristics

NTN has developed a torque lower than 50% of the thrust needle bearing "low torque thrust needle roller bearings." Expected to be used to improve gasoline fuel efficiency and hybrid transmission.
The new product is aimed at producing torque thrust needle roller bearings developed two elements: one for "roller" in the bearing inner and outer rings caused by different walking distance of "roller" slide in the track surface and place " roller slide and the loss of rail wheels. " The other is from the guide "roller" to maintain smooth movement device and the "roller" contact occurred "roller and cage sliding losses."
The former (with the track roller slide round loss) is reduced through the use of "all convex roller (full-crowningroller)" implementation. All convex roller made of a spherical-shaped end (end of the cross section for the arc-shaped). The thrust needle roller bearings used in the past, cutting convex roller (cut-crowningroller) ends of the cone units (end of the cross section is trapezoidal). Through the use of all convex roller, not only shortened the roller contacts with the track wheel part of the contact length, but also reduces roller walking distance difference between inside and outside the ring, thus reducing sliding loss.
The latter (roller and cage sliding loss) is reduced by the all-convex roller, and to improve the retainer contacts with the roller cage part of the shape of contact surface achieved. Specifically to improve the device contact surfaces to maintain the machining precision of the contact surface is more smooth, so that the lowest speed week end center roller in contact with the retainer.
With these improvements, not only reduces the torque, but also will be running bearing temperature rise at a lower level of inhibition.
NSK Cylindrical Roller Bearings Features:
1. Friction coefficient is small, suitable for high-speed, speed close to the deep groove ball bearings.
2. Roller in line contact with the raceway or repair offline contacts, radial load capacity, suitable to withstand heavy loads and shock loading.
3. N type and NU type axial movement may be able to adapt to errors due to thermal expansion or installation of the shaft and housing caused by changes in relative position can be used for supporting the free end.
4. On the Block Hole axis or higher, and bearing outer ring axis relative deflection after installation should be strictly controlled to avoid contact stress concentration.
5. Inner or outer detachable, easy installation and removal.
Main use: large and medium motor, rolling stock, machine tool spindles, internal combustion engines, generators, gas turbines, gear box, rolling mill, vibrating screen and hoisting transport machinery.

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