The ridges between the ring grooves of a piston are called lands. They play a crucial role in sealing combustion gases and transferring heat between the piston and cylinder wall.
The grooves on the tool will lock into the grooves on the piston of the wheel cylinder and turn to rewind.
On the outside of a piston near its top are two or more grooves that hold steel piston rings. The piston rings are used to form a seal between the piston and the cylinder. The material between the ring grooves is often called the ring lands.
pistons are flat on top. then as you go down the sides you will pass several grooves. below that are the piston skirts. they are basically just the sides of the piston
pistons are flat on top. then as you go down the sides you will pass several grooves. below that are the piston skirts. they are basically just the sides of the piston
It is a spring metal sleeve that goes over a piston to compress the rings so that the piston can be install in the motor. It tightens down on the piston, forcing the rings into the grooves in the piston then you tap it into the cylinder.
Piston ring gap.
The distance a piston travels within the cylinder is called the stroke. It is the distance between the top dead center (TDC) and the bottom dead center (BDC) positions of the piston.
Piston rings are circular metal bands that sit in grooves on the outer diameter of a piston. They create a seal between the piston and the cylinder wall, preventing combustion gases from leaking into the crankcase and maintaining compression within the combustion chamber. This seal allows the piston to move smoothly up and down while also minimizing oil consumption and promoting efficient engine performance.
Generally in grooves near the top of the piston. The compression rings, near the top and the oil rings at the bottom of the top. The ring gaps are staggered.
Have noticed that Ford still uses the screw style pistons on the rear calipers. To retract the piston use either a caliper/piston tool or a set of needle nose pliers. Turn the piston clockwise to get it back in but take note of the position of the grooves as they normally need to align so that a imaginary straight line through the grooves points to the center of the caliper.
Piston crown is the top, skirt is the side below the ring lands (ring grooves). The as you say, the skirt often has cut aways to clear the counterwieghts on the crankshaft.