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Machining cylinder liner counterbores on a heavy-duty Cummins ISX engine block? Allowing cast-iron metal shavings, abrasive cutter dust, and debris to fall into lower crankshaft journals, oil passages, or adjacent cylinder bores guarantees catastrophic bearing wiping, scored liner walls, and early engine failure after overhaul. The M50147 Cummins ISX Counterbore Chip Catcher Kit creates an airtight, debris-proof mechanical barrier to contain 100% of machining chips right at the deck surface.

The Critical Physics of Counterbore Debris Containment During Block Machining

On Class 8 heavy-duty Cummins ISX and ISX15 powerplants, counterbore ledge wear and fretting are common causes of liner dropping, blown head gaskets, and coolant leaks. Correcting counterbore ledge geometry requires installing a counterbore cutter machine onto the engine block deck to machine the ledge flat for brass shims. However, this machining process produces thousands of razor-sharp cast-iron chips and abrasive fine particulates. If these chips fall past the lower liner landing into the oil pan or crankcase, they contaminate oil galleries and embed into main and rod bearing shells during initial engine startup. Furthermore, metal shavings entering adjacent open cylinder bores can scratch liner walls or get trapped between liner seals and block bores. Improvised shop rags or cardboard plugs fail under cutting oil and vacuum suction, letting debris bypass into internal engine cavities. The M50147 Chip Catcher Kit completely eliminates contamination risks. Precision-engineered for Cummins ISX platforms (excluding ISX 12), it features two custom-machined 150 mm and 152 mm aluminum disc covers fitted with heavy-duty O-rings that seal firmly inside the target liner bore just below the counterbore ledge. Combined with five bright red expansion plug caps to seal adjacent installed cylinders, this kit creates a closed-system shield that captures 100% of metal cuttings for instant vacuum removal.

• Targeted Cummins ISX Platform Compatibility – Custom-engineered specifically for Cummins ISX / ISX15 engine block liner bore diameters (Excludes ISX 12).
• Dual Precision Aluminum Disc Catchers – Includes 150 mm and 152 mm anodized aluminum disc covers with high-grade sealing O-rings for complete bore isolation.
• Five Red Expansion Cylinder Plug Caps – Seals surrounding installed cylinder liner openings to prevent stray debris from entering adjacent bores.
• Protects Oil Passages & Crankcase Bearings – Captures cast-iron chips and abrasive cutting dust at the deck line, preventing engine oil gallery contamination.
• Streamlines Rebuild Cleaning Workflows – Reduces cleanup time during in-frame or out-of-frame block reconditioning, ensuring OEM-level remanufacturing quality.

Stop Gambling with Engine Contamination. Command Total ISX Rebuilding Precision.

The M50147 Cummins ISX Counterbore Chip Catcher Kit is an indispensable capital asset for commercial diesel machine shops, engine remanufacturers, fleet overhaul bays, and field service technicians. Eliminate bearing wiping, protect crankcase oil galleries, and machine counterbores with complete mechanical authority using Apex.

Technical Specifications

Technical Metric	Value / Fitment Reference Guidelines
Target Engine Platforms	Cummins ISX / ISX15 Heavy-Duty Diesel Engine Blocks (Excludes ISX 12)
Primary Operational Function	Captures machining chips and metal debris during liner counterbore cutting operations
Disc Catcher Specifications	150 mm & 152 mm precision-machined aluminum discs with replacement O-rings
Part / Model Reference Number	M50147 (50147 / M50147-1)
Included Protection Fasteners	Five (5) red expansion seal-plug caps for adjacent installed cylinder bores
Total Package Shipping Weight	3.00 lbs (Lightweight, high-strength aluminum & polymer kit assembly)

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