Automatic Transmission
Overview
Automatic transmissions ensure smooth gear changes with minimal shift shock while operating under various kinds of driving conditions. A complex and extremely intricate form of technology known as friction control is ideal for efficiently conveying power from the engine and for smooth gear shifting. Friction-related parts and one-way clutches, which have been developed based on our advanced tribology technology, are the most important products in determining the performance of automatic transmissions. They contribute to a smooth and powerful driving experience.
Product List
EV motors operate at high rotation speeds that accordingly translate to increased heat generated during clutch engagement. NSK's new wet-friction materials deliver high heat resistance, increased flexibility, and an optimized wear-resistant design to meet the needs of EV today and the future.
EV motors operate at high rotation speeds that accordingly translate to increased heat generated during clutch engagement. NSK's new wet-friction materials deliver high heat resistance, increased flexibility, and an optimized wear-resistant design to meet the needs of EV today and the future.
Unique friction materials produce an excellent and smooth shift quality.
Lightweight, compact, and reliable shifting can be achieved.
The compact design for high torque capacity is established.
An optimal design to maximize functionality of the clutch.
A traction control system is achieved with high anti-shudder performance.
The action of roller and spring reduce drag torque remarkably.
Selection of the raceway washer and retainer type can be according to operating conditions, such as load, rotation speed, and lubrication.
For coping with increasingly high-speed rotations and low-friction torque while maintaining durability.
From sliding bearings to rolling bearings, low friction torque has been achieved by the technology of thin cross section drawn-cup bearings.
Smoother shifting is achieved by replacing sliding bearing with rolling bearing.
Special arrangement of balls achieves a reduction of rotational torque and sliding friction torque.
Reduced weight and costs have been achieved by using of PA46 plastic cage with superior oil and heat resistance. Initial internal clearance is used to provide optimum preload.
Original materials and heat treatment have been developed for longer life. Initial internal clearance is used to provide optimum preload.
The number of parts is reduced by unitization of the housing and outer ring, which also allows for easier assembly.
The outer ring has a mounting flange and splines, which attach to the one-way clutch. This affords greater compactness of FF-type automatic transmissions.
Reduced weight and costs have been achieved by using PA46 plastic cage with superior oil and heat resistance.
Maximum capacity in a limited space (thin section) has been achieved by high-level design technology, which promotes greater compactness of FF-type automatic transmissions.
FAQs
Loads are defined by their direction. Loads perpendicular to the shaft are called radial loads and loads parallel to the shaft are called axial (thrust) loads.
While DGBBs can handle axial loads in both directions, single-row angular contact ball bearings can only receive axial load in one direction.
Seals and shields offer additional protection for bearing components and help to improve and maintain lubrication. In terms of sealing performance, sealed bearings rank best, followed by shielded bearings, then finally open bearings. NMT uses supplementary designations D, DU, DW, and V (DD, DDU, DDW, VV) for sealed bearings and Z (ZZ) for shielded bearings. No supplementary designations are listed for open bearings.
