Assignment

The fixed-caliper brake is the oldest construction of a disc brake. When it was invented theyused just one piston for each side, nowadays there might be up to four. They decreased in terms of size and weight and might work on different brake pads. In earlier times the fixed-caliper brake was used for utility vehicles, now it shifted to more powerful cars.

Function

The name originates from the fact that the caliper with the pistons is firmly connected to the suspension. Therefore, the pistons must press in contrast to the sliding caliper brake from both sides the pads against the disc brake. The brake disc at the motorcycle can be mounted axially movable for better adjustment of the pads.

The drawing above shows a six-piston fixed caliper brake. The lower arrow indicates the connection of the brake pipe and the upper arrow the thread for the bleed screw. The two sides are thus no longer connected by an inner bore. Probably remains cooler in the outer line, the brake fluid.