Materials of chrome plated taper faced ring is ductile cast iron.
It has high elasticity, good oil scraping and gastight properties, excellent wear resistance, used for comp.
Rings of four-cycle engines.
Undercut machining is interrupted at both ends of the joint.
Interrupted scraper ring has an oil scraping property which is inherent to the scraper type as well as control action against blow-by which is caused by undercutting.