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Extracting or driving camshaft bearings during a complete engine rebuild or block overhaul on Cummins Big Cam, Small Cam, NH, NT, or N14 heavy-duty diesel engines? Attempting to remove or install deep-block camshaft bearings using generic brass drifts, universal split-collets, or hammers creates severe misalignment and distorted oil holes. An un-centered or cocked camshaft bearing spins inside the housing bore, blocking critical oil feed passages and causing immediate camshaft journal seizure, wiped lobes, and catastrophic engine failure. Engineered for heavy-duty commercial rebuilders, fleet overhaul stalls, and diesel machine shops, the M20060 Master Cam Bearing Driver & Puller Set provides a complete 61-pound precision alignment system equipped with full-length 24″ and 55″ drive bars, expanding guide collets, and stepped bearing adapters to extract and seat camshaft bearings dead-straight across all internal block webs without scoring precision housing bores.

The Critical Physics of Camshaft Journal Lubrication & Parallel Alignment

Heavy-duty Cummins 855-cubic-inch platforms—including legacy Small Cam, Big Cam I-IV, NH, NT, and high-horsepower N14 engines—utilize internal camshaft bearings pressed into multiple engine block webs along the entire length of the crankcase. Each bearing must be positioned at exact depth to align its internal lubrication holes with the oil galleries feeding from the main rifle. When technicians attempt to drive bearings into deep internal webs using short universal drivers or hammers, single-point impact forces cock the thin-walled bearing shell. Driving a tilted bearing distorts its cylindrical shape, causing edge-loading against the camshaft journal. Even worse, if the bearing is driven a fraction of an inch past its designated stop depth, the oil feed hole is covered. Upon initial engine startup, the unlubricated camshaft journal generates extreme friction heat, melting the babbitt lining, galling the camshaft, and throwing metal shrapnel into the oil pan. The M20060 Master Cam Bearing Kit completely eliminates these installation hazards. Built with high-tensile 55-inch and 24-inch drive bars and precision-machined stepped adapters, the tool pilots through adjacent block bores to hold perfect axial alignment. Turning the heavy forcing nut or driving the solid shaft applies 360-degree parallel force, gliding fresh bearings into position with 100% oil hole alignment and zero housing bore scratching.

• Comprehensive Cummins Platform Fitment – Purpose-built specifically for complete camshaft bearing extraction and installation on Cummins Big Cam, Small Cam, NH, NT, and N14 engine blocks.
• Full-Length Alignment Drive Bars (24″ & 55″) – Extra-long precision-ground steel bars pilot through multiple block webs to guarantee 100% straight, non-tilted bearing seating in deep internal bores.
• Integrated Puller & Driver Functionality – Complete master set includes expanding collets, stepped bearing adaptors, centering guides, and thrust washers for both removal and installation.
• Guarantees 100% Oil Passage Alignment – Ensures thin-walled cam bearings seat to exact factory depth without covering block oil galleries or distorting babbitt linings.
• Massive Heavy-Duty Commercial Construction – Substantial 61.00 lbs solid alloy steel build engineered for continuous daily service in engine remanufacturing plants and heavy equipment overhaul bays.

Stop Cocking Internal Bearings. Command Total Cummins Rebuilding Precision.

The M20060 Cummins Big & Small Cam Master Kit — Cam Bearing Driver & Puller Complete Set NT, NH, N14 is an essential capital asset for commercial engine rebuilders, Cummins dealership service bays, fleet maintenance facilities, and heavy diesel machine shops. Prevent spun bearings, protect engine block webs, and service camshaft bearings with complete mechanical authority using Apex tools.

Technical Specifications

Technical Metric	Value / Fitment Reference Guidelines
Target Engine Platforms	Cummins Big Cam (I-IV), Small Cam, NH, NT, and N14 Series (Excludes ISX)
Primary Operational Function	Non-destructive extraction and precision driving of internal camshaft bearings
Drive Bar Equipment Included	24-inch and 55-inch precision-ground steel drive/puller bars with centering cones
Part / Model Reference Number	M20060 (20060)
Construction Metallurgy	High-tensile precision-machined structural alloy tool steel
Total Package Shipping Weight	61.00 lbs (Heavy-duty master shop service kit – Freight required)

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