The Carlisle Brake & Friction PD1473 Series Service Brake is a hydraulically actuated, single opposed piston, caliper disc brake, designed to provide medium torque ranges for moderate to severe service conditions. Both the caliper and disc require fixed mountings. Multiple calipers may be used on a single disc to proportionately increase torque output. This brake is also available with retracting springs and automatic adjusters, ideal for high speed applications.