Possible reasons for a hot automotive wheel hub:

1. Wear of wheel hub bearing: A too tight or excessively worn wheel hub bearing can cause the hub to become hot. In severe cases, the bearing may be burned out;

2. Bearing oil shortage: If the temperature is too high, the grease oil in the bearing can melt and flow out, weakening the braking effect and causing the wheel hub to become hot;

3. Abnormal return of brake cylinder: If the brake cylinder returns abnormally, it will cause the brake pad to lock in position, and consequently the brake pad and brake disc will remain in a frictional state, resulting in brake drag. Meanwhile, the brake drum and the wheel hub will also become hotter;

4. Frequent braking: During driving, frequently operating the brake may cause the brake disc to become hot. In severe cases, the brake pad may break, resulting in brake failure. Besides, heating of the brake disc can also increase the temperature of the wheel hub.

Advantages of vika hub unit:

I. Material:

Grease: The vika hub units make 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: The 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.