To obtain still higher unit pressures than with a slotted oil control ring, this type of ring has the outer lands chamfered on the outer edge. On this type, both lands are chamfered on the edge facing the combustion chamber. While the unit pressure...
A slotted oil control ring with two outer lands, the sides of which are parallel to one another. Compared to the slotted oil control ring described above, this ring additionally has a groove on the inside diameter to accommodate the coil spring....
The wear coating gives the ring high long-time stability and makes it particularly suitable for operation mainly in diesel engines. The profile grinding of the lands allows close tolerances to be achieved on these critical working surfaces....