High-Precision Deep Groove Ball Bearing 6306 (30x72x19mm) for CNC Machine Tools – SKF NSK NTN Timken NACHI

Product Specifications

Application Industries

Eliminate CNC Downtime with Genuine High-Precision Deep Groove Ball Bearing 6306

CNC machine operators know the frustration of unexpected spindle failures—often traced to substandard bearings that fail prematurely under high-speed rotation. Sourcing authentic precision bearings from multiple suppliers wastes valuable time, while inconsistent quality control across channels creates hidden risks for your production line. When emergency maintenance hits, waiting weeks for cross-brand spare parts can bring entire operations to a standstill.

Genuine 6306 Bearings in Stock for Immediate Delivery

Our High-Precision Deep Groove Ball Bearing 6306 (30x72x19mm) solves these challenges with 100% authentic products from SKF, NSK, NTN, Timken, and NACHI—all available from our ready stock of P4/P2 precision grade bearings. As an officially authorized distributor, we ensure every bearing meets strict ISO 9001 and DIN standards, with full-process quality traceability from incoming material verification to finished product delivery. Whether your CNC machine requires ZZ-sealed, 2RS-sealed, or open configurations, we have the exact specification ready for same-day dispatch.

Engineered for High-Speed CNC Operations

This 6306 bearing excels in precision-critical applications like CNC spindle systems, where it withstands radial loads and moderate axial loads at high rotational speeds. The deep groove design provides low friction and high running accuracy, while vibration class options (Z1V1 to Z3V3) allow customization for noise-sensitive environments. Available with grease or oil lubrication, it maintains stable performance across industrial temperature ranges, making it ideal for continuous-duty machining centers and automated production lines.

Technical Details That Maximize CNC Performance

Precision rating directly impacts your CNC machine's accuracy—our P4 and P2 grade options deliver minimal radial runout and axial clearance, ensuring consistent part quality even during extended production runs. The seal type selection balances protection and speed: ZZ metal shields offer high-temperature resistance for dry machining, while 2RS rubber seals provide superior contamination protection in coolant-rich environments. Vibration class Z3V3 is critical for high-speed spindles, reducing resonance that can degrade surface finish and tool life. Every bearing undergoes standardized precision testing before shipment, verifying dimensions (30mm bore, 72mm outer diameter, 19mm width) and performance metrics against OEM specifications.

Why Genuine Bearings Lower Your Total Cost

Counterfeit 6306 bearings may seem cheaper upfront, but they typically fail within 30-50% of the expected service life of genuine parts. A single spindle failure can cost $2,000-$5,000 in repairs plus thousands more in production downtime. Our authentic High-Precision Deep Groove Ball Bearings come with complete certification documentation, ensuring compliance with machine tool manufacturer warranties. By investing in genuine bearings, you reduce unplanned maintenance, extend equipment lifespan, and protect your CNC investment—ultimately lowering your total cost of ownership.

Your Trusted Precision Bearing Partner

Packaging & Shipping

• Original manufacturer packaging with protective inner carton and outer pallet reinforcement
• Standard package dimensions: 9.20cm × 9.20cm × 3.90cm, gross weight 0.347kg per unit
• Priority processing available for urgent maintenance orders
• Global logistics options including DHL, FedEx, UPS, air freight, and sea freight
• Real-time shipment tracking and dedicated logistics support
• Minimum order quantity: 1 unit, ideal for emergency repairs and small-batch requirements

Get Your CNC Bearings Shipped Today

Don’t let bearing issues disrupt your production schedule. Send us your 6306 bearing requirements—including seal type, precision grade, and quantity—and our team will provide a unified quotation within one working day, complete with authorization certificates and quality inspection documents. With our ready stock and streamlined procurement process, you can have genuine bearings delivered to your facility in 3-7 business days, minimizing CNC downtime and restoring your production efficiency.

Frequently Asked Questions