MAHLE 3021191 Napier Ring Set - 4.610" Bore, 1.0mm x .136" Steel THM-13 Plain

The MAHLE 3021191 is a precision-engineered steel piston ring set designed for high-performance and industrial engine applications. This Napier-style ring set features THM-13 steel construction for superior durability and heat resistance in demanding operating conditions.

Key Specifications:

• Bore Size: 4.610 inches (117.094mm)
• Ring Width: 1.0mm
• Radial Wall Thickness: 0.136 inches
• Material: THM-13 steel alloy
• Style: Plain (non-chromium plated) Napier ring configuration
• Application: Compression ring for industrial and marine engines

MAHLE ring sets are manufactured to OEM specifications with precision tolerances for optimal cylinder sealing, reduced blow-by, and extended service life. The Napier design provides excellent oil control and compression sealing characteristics. These steel rings offer superior wear resistance compared to cast iron alternatives, making them ideal for heavy-duty applications where cylinder pressures and temperatures are elevated.

This ring set is commonly used in industrial compressors, marine diesel engines, and large-bore stationary power units requiring robust, reliable sealing components.