Disc Driven

ARVINMERITOR

ArvinMeritor released its DX 225 air disc brake (below), part of the Meritor Disc Plus product family launched in 1997. The design fits within 22.5-inch wheels and is available on axles with up to 24,000 pounds GAWR, and is compatible with both ABS and Electronic Braking Systems.

The DX 225 consists of a lightweight, single piece cast caliper, supported on twin slide pins, fixed to a mounting saddle. Brake torque is fed through the saddle directly into the axle, leaving the caliper free to float on precision-machined slide pins. This means equal force is applied to both inner and outer pads clamping the rotor.

The new unit has permanently lubed components, sealed slide pins, more wearable lining volume, and lift-out lining pads. DX 225 brakes will be available for trailers as part of ArvinMeritor’s TL and TA trailer axles with packaged bearings.

BENDIX

Designed for 22.5-inch wheels, the ADB 225 from Bendix is 30 pounds lighter per wheel-end compared to models currently available in Europe. Bendix cut the weight by eliminating component mass associated with compounding, a European standard allowing two separate systems for the service brake and the emergency brake.

DANA

Dana’s model ESD225 disc brake for 22.5-inch and 24.5-inch wheels has an unhanded caliper design with four enclosed slide pins to provides superior caliper support, minimal slide pin wear, reduced lining and rotor wear, and lighter weight. Quick-change linings also provide easy access to minimize maintenance labour and expense. The actuator/adjuster has a dual piston gear synchronized design, and can be serviced as a removable unit. Metal piston shields expand to protect the actuator piston boots. The system is available for steer, drive, and trailer axles.

HALDEX

Haldex’s air disc brake for 19.5-inch and 22.5-inch wheels has a twin tappet design for even distribution of braking forces and longer lining life.

The unit has quadruple stainless steel caliper slide pins that are identical and interchangeable. Teflon slide pin bushings require no lubrication. And, because the application and adjustment mechanism is supplied as a single, integrated module, the unit is easier to service.