Machine all counterbore surfaces faster and more efficiently with a precision-engineered engine counterbore tool.

The KL50000 Engine Counterbore Tool Kit from K-Line Industries is a precision-engineered engine counterbore tool designed to resurface counterbore ledges in diesel engine blocks quickly and accurately. Its manual operation, spring plunger system, and compatibility with in-frame engine service make it an ideal choice for professional engine builders and field technicians. This compact counter bore cutting tool eliminates the need for special bases or power tools and helps restore proper liner protrusion while reducing total service time, making it a reliable addition to your lineup of diesel engine machine tools.

Features & Specs

• No special bases or adapters required
• Performs both in-frame and out-of-frame resurfacing
• Spring plungers apply consistent downward pressure
• Manually operated—no external power tools needed

Kit Highlights:

• Supports multiple heavy-duty diesel engine types
• Single setup for resurfacing counterbores in one block
• Reliable, clean cuts every time
• Built to exacting K-Line Industries standards for durability

Patented: U.S. Patent No. 8.308.401; Canada Patent No. 2667147

Setup & Troubleshooting Tips

To get accurate results with your KL50000, follow these tips:

• Clean and inspect both the base and engine deck for burrs or debris
• Apply even torque across all counterbores
• Ensure the carbide is free of chips and securely tightened
• Verify that the cutter head has no runout or damage
• Avoid clamping at the center of the base to prevent warping

Kit Contents:

Replacement Parts:

Cutter Assemblies Available

For The Following Engines: