What is the difference between brake drum and wheel head?

1. Different properties: the hub is the rotating part of the wheel core connected by the column of the tire inner profile wheel steel. Brake drum is a friction pair of drum brake, in addition to the strength and stiffness required as a component.

2. Different devices: in addition to various slowing devices, automobile brakes are almost friction brakes that use the friction between fixed components and the working surface of rotating components to produce braking torque. The rim is fitted with the tire assembly to support the wheel portion of the tire.

3, the composition is different: the width of the hub is also commonly known as J value, the width of the hub directly affects the selection of the tire, the same size of the tire, the J value is different, the selection of tire flat ratio and width is different. Brake drum is made of high strength gray cast iron or alloy cast iron containing Cr.

Matters needing attention:

1. When the temperature of the wheel is high, it should be cleaned after natural cooling, and never clean with cold water; Otherwise, the aluminum alloy wheel will be damaged, and even the brake disc deformation and affect the braking effect. In addition, at high temperature with detergent to clean the aluminum gold wheel, will make the wheel surface chemical reaction, luster, affect the appearance.

2. When the wheel is stained with tar that is difficult to remove, if the general detergent does not help, the brush can be used to try to remove it, but do not use a hard brush, especially an iron brush, so as not to damage the surface of the wheel.

3, if you find that there are deep scars on the hub, and be sure to observe whether the metal surface is exposed, if you can't see the metal surface will not rust, you can paint the brick heart. Point the paint bit by bit and let it dry completely. If you find metal exposed, you'd better replace it.