Double Row Angular Contact Ball Bearing 3211-A TN9 SKF P4 Precision for CNC Machines

Product Specifications

Application Industries

Minimize CNC Machine Downtime with SKF 3211-A TN9 P4 Precision Double Row Angular Contact Ball Bearings

CNC machine operators know the frustration of unexpected spindle failures—downtime costs accumulate at $500–$2,000 per hour while replacement bearings wait weeks for delivery. Many turn to generic alternatives only to face premature wear within months, compromising machining accuracy and surface finish quality.

Authentic SKF P4 Precision Bearings, In Stock for Immediate Delivery

The Double Row Angular Contact Ball Bearing 3211-A TN9 SKF P4 Precision is engineered to eliminate these headaches. As an officially authorized SKF distributor, we maintain ready stock of P4 precision grade bearings, ensuring your CNC machine gets the exact replacement it needs without production delays. Our standardized precision testing procedures verify every bearing meets SKF's strict tolerances before shipment, guaranteeing compatibility with high-speed spindle applications.

Engineered for CNC Machine Spindle Performance

This SKF 3211-A TN9 Bearing excels in the demanding conditions of CNC machine spindles, where it simultaneously handles radial and axial loads at rotational speeds up to 6,000 r/min. The double row angular contact design provides higher rigidity compared to single row bearings, critical for maintaining machining precision during heavy cutting operations. Its separated structure allows for easy mounting and preload adjustment, simplifying maintenance procedures.

Technical Features That Maximize Spindle Lifespan

The P4 precision rating ensures minimal radial runout (≤3 μm) and axial play (≤5 μm), directly translating to tighter machining tolerances and superior part quality. The bearing's steel, copper, or nylon cage options allow customization based on operating conditions—nylon cages reduce noise in high-speed applications, while steel cages withstand higher temperatures up to 120°C. SKF's precision manufacturing ensures consistent load distribution across both rows, extending bearing life by up to 30% compared to non-precision alternatives. The oil and grease lubrication compatibility provides flexibility for different spindle designs and maintenance schedules.

Why Authenticity Matters for CNC Operations

Counterfeit angular contact bearings often skip critical heat treatment processes, resulting in 50–70% shorter service life. A single spindle failure from substandard bearings can damage expensive motor components and require complete spindle rebuilds costing $10,000–$30,000. Our bearings come with full certification documentation traceable to SKF's manufacturing facilities, ensuring compliance with ISO 9001 quality standards. The true cost savings come from reduced maintenance frequency, consistent machining accuracy, and elimination of unplanned downtime.

Our Commitment to CNC Machine Operators

Packaging & Shipping

• Original SKF packaging with protective inner carton and outer pallet reinforcement
• Same-day processing for in-stock items, with delivery in 3–7 business days to global destinations
• Flexible shipping options including DHL, FedEx, UPS, air freight, and sea freight
• Real-time logistics tracking provided for all shipments
• Minimum order quantity of 1 piece, ideal for emergency repairs and scheduled maintenance

Get Your CNC Machine Back to Production

Don't let bearing issues disrupt your production schedule. The longer your CNC machine sits idle, the more revenue you lose. Send us your bearing requirement today, and our team will confirm availability and provide a quotation within one working day—keeping your spindles running and your production on track.

Frequently Asked Questions