The part number 11373-30-03 refers to a Chris-Marine rough diamond honing stone, specifically designed for cylinder liner honing in large marine and industrial engines.

Product Highlights

• Type: Rough diamond stone
• Application: Used in the initial honing stage to remove wear edges, scoring marks, and ovality from cylinder liners
• Surface Finish Range: Achieves a roughness average (Ra) of 3–6 µm
• Compatibility: Fits Chris-Marine honing machines with multi-arm heads (typically 4-arm or 8-arm setups)
• Durability: Diamond composition ensures long life and consistent cutting performance
• Condition: Often sold new with international shipping options

This stone is ideal for engines undergoing full overhaul, especially when liners are heavily worn or damaged. It's part of a multi-step honing process that typically includes:

• Rough honing (11373-30-03)
• Medium honing (e.g., 11373-20-16)
• Fine honing (ceramic stones for final polish)