Sunnen M27J65 Cylinder Honing Stone Set AN500 280-Grit 20 Ra Finish

The Sunnen M27J65 is a precision cylinder honing stone set designed for professional engine rebuilding and machining applications. This hone stone set features AN500 abrasive material with 280-grit specification, engineered to deliver a consistent 20 Ra (roughness average) surface finish on cylinder bores.

Key Features:

• AN500 abrasive composition for controlled material removal and superior finish quality
• 280-grit specification provides optimal balance between cutting action and surface refinement
• Produces 20 Ra surface finish ideal for modern piston ring sealing requirements
• Precision-manufactured to Sunnen's exacting tolerances for consistent bore geometry
• Compatible with Sunnen honing machines and mandrels
• Suitable for cast iron, steel, and aluminum cylinder applications

This hone stone set is an essential consumable for automotive, marine, motorcycle, and small engine machine shops performing cylinder reconditioning work. The 280-grit rating makes it ideal for finish honing operations where precise surface texture and crosshatch pattern are critical for proper ring break-in and oil retention. Sunnen honing stones are manufactured to strict quality standards, ensuring repeatable results and extended stone life in production environments.