In co-operation with Haldex, SAF-HOLLAND, supplier of parts for commercial vehicles, has developed a low-weight trailer disc brake. The reduction in weight for a trailer with triaxle suspension amounts to 36 kg. The new SAF SBS 2220 is suitable for both semitrailers and trailers up to 9 metric tonnes combined with 22.5″ tyres.
According to SAF-HOLLAND, there are essentially two measures which have led to this weight reduction: Following an intensive finite element analysis of all components, these were specifically optimized with regard to weight and strength. On the other hand, a new light-weight single-tappet mechanism was developed for the application of the brake.
For a quick and easy disc change, the brake can be easily dismantled with its four fixing bolts. An equally useful feature is the completely encapsulated calliper guide of the SBS 2220 with its non-wearing plain bearings, stainless steel slide pins and rugged inverted bellows which protect the brake against the intrusion of dirt.
The SAF disc brake SBS 2220 can be used with either conventional or INTEGRAL discs which, over the years, have proved to be both very powerful and durable. The new brake weighs only 31 kg including brake pads and is, therefore, an attractive option to increase trailer efficiency. After its successful test bench and field trials, production start has been scheduled for the second quarter of 2011.
