Wheel hub made of: Polished
Publish Time：
2018/11/26
Currently, there are three different types of wheel polishing: traditional polishing, precision machining, and wire drawing. All are based on techniques to polish the wheel hub to reveal its bright metallic original color, but their methods, effects, necessary protective measures, and maintenance methods are vastly different.
Among a series of exquisite, durable, or easily maintainable finishes, polishing breaks down the inherent barriers of painting and electroplating, combining the two, especially after the advent of clear coat, making the wheel hubs more refined.
Traditional Polishing
Traditional polishing, also known as ball polishing, typically uses a series of materials of varying softness to polish the wheel hub until its surface reveals a deep metallic luster. Older polished wheels generally do not have a clear coat applied because the clear coat needs time to adhere to the extremely smooth polished surface. These uncoated polished wheels typically require weekly cleaning, drying, and waxing to prevent air and moisture from corroding the metal surface of the wheel hub. Even so, many car owners still find that they need to repolish the wheel hubs with a ball mill and fine compounds from time to time.
Recently, however, almost all polished wheels are coated with clear lacquer, making configurations previously impossible possible. For example, many three-piece wheels, which were almost impossible to wax in the past, now proudly showcase their polished surfaces.
Repairing polished wheels is relatively simple, but since repolishing requires handwork, it's usually somewhat expensive. Fortunately, older polished wheels can now also be coated with a layer of clear coat after repair.
Precision Machining
Regardless of the type of polishing, if a clear coat is applied, the wheel hub must be cleaned with a mild, non-acidic, non-abrasive cleaner and water.
Precision machining involves rotating the wheel hub on a computer numerical control (CNC) lathe. A cutting tool removes a small amount of metal from the surface, making it smooth and revealing the bright metallic original color. This process leaves a series of concentric circular lines on the wheel hub surface, similar in appearance to a CD.
In most cases, the wheel hub is painted first and then precision machined. If the cutting tool removes the raised paint on the spokes to reveal the original metallic color while retaining the lower paint color, this effect is called "machined face." If the cutting tool removes the paint from the outer rim while leaving the spoke paint, it is called "machined edge."
Machined wheels can be repaired under certain circumstances, but sufficient aluminum material must be available for the operation. Eventually, a critical point will be reached where there is no excess aluminum material left to safely machine the wheel hub. Some wheel hubs have very thin rims during production, thus, they cannot be safely machined.
Regardless of the type of polishing, if a clear coat is applied, the wheel hub must be cleaned with a mild, non-acidic, non-abrasive cleaner and water.
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