5 RING DIMENSIONS D-wall: A specification ... width of a standard automotive piston ring by the use of the following formula; ... 10 6 1 2 3 4 8 1. Free Gap: The end gap clearance when the ring is not compressed 2. End ... Gap: The end gap clearance when the ring is compressed to the bore diameter 3. ... Diameter: The inside diameter of the ring at bore diameter 4. Outside Diameter: ... The outside diameter of the ring at bore diameter 5. Ring Axial Sides: ... The top and bottom surfaces of the ring 6. Torsional Twist: The installed ... position of the ring due to a chamfered area on either ring ... side that helps the ring cross-seal 7. Ring Face: The section of the ring that ... contacts the cylinder wall 8. Back Clearance: Distance between the inside diameter of ...
Torsional HNS and Tool Steel 6 TOP RINGS The top compression ring is ... combustion chamber pressure. The top ring also transfers up to 45% of the heat ... system. JE Pro Seal top compression rings are available in a variety of shapes ( ... the most efficient and economical ring to suit your application. Most JE Pro ... Seal top compression rings have a barrel face with a positive ... twisted configuration takes up the axial clearance in the groove, providing a ... most of the intake stroke, the piston ring twists upward because of the chamfer ... compression and exhaust strokes, the ring may sit fllat on the groove surface ( ... . Although inertial forces direct the ring upward, combustion pressure forces the ... ring to the bottom of the ring groove and forward against the cylinder ...