The M50133 / PT2250-B Heavy Duty Counterbore Tool is a high-precision upper deck counterbore / shim cutter designed for heavy-duty diesel engine blocks. It is engineered to machine or correct the upper "shim" ledge or counterbore surfaces above the cylinder bores, enabling accurate alignment and seating of liners, sleeves, or inserts. This tool is commonly used on high horsepower diesel blocks such as Cummins 855, N-14, NH, Caterpillar 3406 / C15, Detroit 60 Series, and Navistar DT466.
The M50133 housing accepts interchangeable cutter plates for different engine applications, allowing one base tool to service multiple engine families. Because it’s focused on upper deck “shim” cutting, it helps provide a consistent, flat, concentric reference surface across all cylinders.
This tool is ideal for diesel engine rebuild shops, machinists, and heavy equipment service facilities that demand high accuracy in deck counterbore work.
Key Features & Benefits
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Upper deck counterbore / shim cutting capability for heavy-duty diesel blocks
-
Compatible with multiple engine series including Cummins 855 / N-14 / NH, CAT 3406 / C15, Detroit 60, Navistar DT466
-
Interchangeable cutter plates (sold separately) to match specific engine applications
-
Self-centering design for precise alignment and repeatable machining operations
-
Designed for shop use with robust construction and tolerances for reliable service
Replaces Kent-Moore Porta-Tool PT-2250-B, PT2250, PT2200
Uses PT2200-93-6 Cutter bit
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The M50133 / PT2250-B Heavy Duty Counterbore Tool is a high-precision upper deck counterbore / shim cutter designed for heavy-duty diesel engine blocks. It is engineered to machine or correct the upper "shim" ledge or counterbore surfaces above the cylinder bores, enabling accurate alignment and seating of liners, sleeves, or inserts. This tool is commonly used on high horsepower diesel blocks such as Cummins 855, N-14, NH, Caterpillar 3406 / C15, Detroit 60 Series, and Navistar DT466.
The M50133 housing accepts interchangeable cutter plates for different engine applications, allowing one base tool to service multiple engine families. Because it’s focused on upper deck “shim” cutting, it helps provide a consistent, flat, concentric reference surface across all cylinders.
This tool is ideal for diesel engine rebuild shops, machinists, and heavy equipment service facilities that demand high accuracy in deck counterbore work.
Key Features & Benefits
-
Upper deck counterbore / shim cutting capability for heavy-duty diesel blocks
-
Compatible with multiple engine series including Cummins 855 / N-14 / NH, CAT 3406 / C15, Detroit 60, Navistar DT466
-
Interchangeable cutter plates (sold separately) to match specific engine applications
-
Self-centering design for precise alignment and repeatable machining operations
-
Designed for shop use with robust construction and tolerances for reliable service
Replaces Kent-Moore Porta-Tool PT-2250-B, PT2250, PT2200
Uses PT2200-93-6 Cutter bit
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