Metric Cast Iron Piston Rings
When using cast iron piston rings, it is crucial to use the correct groove design for proper performance of the cylinder. Groove width: To permit the ring to slide freely into the groove, the groove must be at least .025mm wider than the maximum piston ring width with a tolerance of +.076mm / -0.000mm Groove Depth: Grooves must be at least .381mm" deeper than the maximum radial wall thickness of the piston ring with a tolerance of +.0762mm / -0.000mm This is to avoid any possibility of the ring bottoming in the groove when the ring is compressed to its working diameter. Radial Clearance: The radial clearance between the cylinder bore and the piston should be less than 1/3 of the radial wall thickness of the piston ring to ensure sealing effectiveness. Material: Iron Note: Some minimums may apply. If you can’t find something you’re looking for, give us a call at 800-445-7803.
