NN3016MBKRCC1-P4 1:12 Tapered Bore Double Row Super Precision Cylindrical Roller Bearing 80×125×34mm Machined Brass Cage For CNC Milling Machine Main Spindle

NN3016MBKRCC1-P4 is a super precision double row cylindrical roller bearing specially designed for high rigidity CNC spindles, with 1:12 tapered inner bore, MB solid machined brass cage, CC1 special small radial clearance and P4 ultra-precision tolerance gradeNSK.

NN structure features three ribs on inner ring and rib-free outer ring, allowing slight bidirectional axial displacement of the shaft. It provides ultra-high radial stiffness and heavy radial load capacity, low heat generation and stable high-speed rotation, widely matched on vertical/horizontal machining center spindles requiring high precision cutting.

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• Model: NN3016MBKRCC1-P4
• Inner Diameter (ID): 80mm
• Outer Diameter (OD): 125mm
• Width (B): 34mm
• Taper Bore Ratio: 1:12 (K suffix)
• Structure: Double row cylindrical roller, three ribs inner ring, ribless outer ring, MB solid brass machined cage
• Material: GCr15 bearing steel
• Precision Grade: P4 Super Precision
• Radial Clearance: CC1 (extra small clearance for spindle preload)
• Min Fillet Radius r: 1.1mm
• Basic Dynamic Load Cr: 147kN
• Basic Static Load C0r: 186kN
• Grease Limit Speed: 7000 r/min; Oil Mist Limit Speed: 8000 r/min
• Weight: 1.47kg

👉 Full technical data, spindle matching drawings and preload parameter sheet available upon request

• 1:12 tapered inner bore realizes accurate preload adjustment via adapter sleeve, greatly improving spindle rotation rigidity
• Double row cylindrical roller layout delivers outstanding radial load capacity, minimal deflection under heavy cutting load
• MB solid brass cage runs stably under ultra-high speed, anti-deformation and low friction heat
• CC1 extra small clearance eliminates spindle vibration, ensures ultra-low noise high-precision machining
• P4 super precision grade controls strict dimensional tolerance, stable long-term machining accuracy
• Support OEM laser marking, customized preload matching and fumigated wooden export packaging

👉 Reduce spindle maintenance frequency and upgrade processing precision & efficiency

This bearing is widely used in:

• Vertical & horizontal CNC machining center main spindles
• High-speed mold engraving & grinding machine spindles
• Precision heavy-duty lathe spindle assemblies
• Automated metal cutting high-speed rotary equipment
• High precision printing roller transmission systems

👉 Ideal solution for customers pursuing ultra-high rigidity and long spindle service life

• 25+ years experience manufacturing P4 super precision spindle cylindrical roller bearings
• Complete stock of NN30 series tapered bore precision bearings for fast delivery
• 100% strict precision grinding, heat treatment and high-speed temperature rise testing before shipment
• Professional spindle matching technical support within 24 hours
• Stable bulk supply for machine tool factories and spindle manufacturers

👉 We focus on quality, reliability, and long-term partnership

• Raw material chemical composition & hardness inspection
• Ultra-precision internal/external grinding & low-temperature heat treatment monitoring
• CC1 clearance calibration & P4 dimensional tolerance full inspection
• High-speed rotation noise & temperature rise endurance test
• Taper bore matching test with standard adapter sleeve
• Final anti-rust oil & fumigated wooden box packaging inspection before delivery

👉 Ensuring consistent stable precision performance for every bearing

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Looking for reliable P4 precision CNC spindle bearing supplier?

👉 Send your inquiry to get:

• Fast quotation within 24 hours
• Engineer one-on-one spindle matching technical support
• Custom clearance & preload grade service
• Competitive factory bulk wholesale price

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