Rollers for processing valve seats
B - valve contact width;
F - valve guide;
H is the height of the cylindrical part;
S is the valve seat ring.
The valves are ground on a grinding machine at an angle of 45°. Valves too low (H) must be replaced. The minimum edge thickness for gasoline engines: exhaust valve - H=1.98 mm, inlet valve - H=1.19 mm.
Attention: When machining the valve seat, machine the surface at a 45°angle, then machine the width of the contact surface by milling while maintaining the correction angle. After processing, grind the valves.
Dimensions after machining of valve seats