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What are the components of a hub unit?


Hub unit is a common part in modern cars. As an integrated unit installed on the wheel hub of a car, it is usually comprised of bearing, hub, transmission components, and sensors. It serves the main purposes of supporting and rotating the wheels and transmitting driving and braking forces. Hub units are designed in such a way to help to reduce friction and energy loss during wheel rotation, thereby improving driving stability and efficiency.

A typical hub unit often consists of the following components:

Bearing: The hub bearing supports the load generated during wheel rotation, allowing the axle to rotate smoothly.

Hub: The hub is the central part of a wheel, and connected to the tire. It transmits driving and braking forces to other parts of the vehicle through the axle.

Transmission components: The transmission components of the hub unit are mainly used for transmission of driving and braking forces. They enable connection between the axle and the engine and braking system, and can effectively transmit power and braking forces.

Sensors: Some hub units are also provided with sensors to monitor the speed, position, and other parameters of wheels. Such information is sent to the vehicle's electronic control system to trigger functions such as the anti-lock braking system and the traction control system.

The hub units are designed to simplify the manufacturing and maintenance of vehicles, and to improve their performance and safety.

vika 1T0598611B hub unit

Advantages of vika hub unit:

I. Material:

Grease: vika hub unit makes use of Japanese KYODO YUSHI AF-1 grease designed specifically for automotive hub bearings. It can be used safely even under harsh conditions (-20°C~170°C). Extreme pressure additives and oxidation stabilizers have been added to enhance load capacity and resist leakage due to softening.

Steel ball: The curvature and position of each steel ball and clearance between balls and bearing are highly uniform. During operation, the steel balls rotate smoothly without any obstruction and are highly resistant to wear.

II. Process:

High-frequency quenching process: The high-frequency quenching layer of the inner and outer rings is 2.5 to 3.5 mm in depth, and the quenching depth and hardness are strictly controlled to ensure long service life of the bearing.

Heat treatment process: The vika hub units are based on a Bainite process that leads to higher toughness, prevents cracking during rotation, and prolongs the service life.

Turning process: A mud water tank design is adopted to allow mud water to be thrown out easily. The CNC automatic turning process not only ensures smooth and wear-resistant tool lines on the surface of every component and uniform chamfering, but also leads to high dimensional accuracy and stability of the components.

Rolling process: vika hub units are produced in strict accordance with OE standards, and their surface rolling finish reaches Rz0.2 grade. This rolling process is an alternative to corresponding heat treatment process.

Thread: With smooth surface, the threads provide good self-locking and wear resistance, are easy to assemble, and feature high strength.

Gear broaching: The gear broach moves from the bottom diameter of the groove and completes an operation cycle in one travel, thus meeting the tolerance requirements of the guide teeth and contributing to more accurate installation of the guide teeth.

Revolving riveting: The revolving riveting mouth is a circular arc formed by spinning in line with OE standards.