You do have countless options when it comes to truck clutch disc designs and friction materials. If you happen to choose the wrong type of disc for your application, you might be in for a little trouble.

Each disc basically consists of a friction surface and a hub. A hub is something that slides onto the transmission input shaft, so you need that hub to match the diameter and splines of the specific input shaft. The hub is also available in spring and non-spring versions. The spring around the center of the hub acts like a harmonic balancer. In fact, they absorb some of the shocks of clutch engagement. Non-sprung solid hub discs should be used in racing applications as they are for commercial use only and can be quite demanding when engaging.

Essentially, the rest of the disc is the friction surface. The diameter of this friction surface needs to coincide with the diameter of the pressure plate in order to play a maximum role. There are many types of friction materials used for clutch discs. This includes, but is not limited to, Organic, Sintered Bronze, Sintered Aluminum, Sintered Iron, Ceramic, and Kevlar. Each material has its own coefficient of friction and therefore its own performance class. You'll also notice that many of these friction materials are distributed evenly in the shims around the circumference of the disc.

Organic materials are what you consider OEM or stock replacement materials. These generally have excellent street manners and don't exhibit any sort of clutch chatter after breaking in. When you go into a dual friction disc (organic/high friction material) and a disc composed entirely of the same high friction material, there is always the possibility of chattering or less-than-perfect behavior.

Taizhou Benwo Auto Parts Co., Ltd. Is a Sachs Clutch supplier from China. The company mainly manufactures and sells Heavy Duty Truck Clutch, and provides Euro Truck Parts and other products.