High Precision NNU4956B/SPW33 Cylindrical Roller Bearing for CNC Machine Tools

Product Specifications

Application Industries

Reduce CNC Downtime with Genuine NNU4956B/SPW33 High Precision Cylindrical Roller Bearings

CNC machine operators know the cost of unexpected spindle failure—unplanned downtime, missed production deadlines, and expensive repairs. Many face challenges with counterfeit bearings that fail prematurely or struggle to source high-precision double row roller bearings with reliable delivery. When your equipment relies on consistent accuracy, every minute of downtime impacts your bottom line.

Genuine SKF Bearings in Stock for Immediate Dispatch

Our High Precision NNU4956B/SPW33 Cylindrical Roller Bearing addresses these pain points directly. As an officially authorized SKF distributor, we guarantee 100% authentic products with full traceability. This double row cylindrical roller bearing is part of our ready stock of P4/P2 precision grade bearings, ensuring rapid delivery to minimize your equipment downtime. Designed for CNC machine tool spindles, it provides the stability and precision required for high-speed machining operations.

Engineered for High-Precision CNC Machining

This NNU4956B/SPW33 bearing excels in high-precision industrial scenarios, particularly in CNC machine tools where rotational accuracy and load capacity are critical. Its double row design delivers exceptional radial load handling, making it ideal for spindle applications that demand consistent performance under varying cutting forces. The open seal type allows for optimal lubrication in controlled environments, ensuring smooth operation even at high rotational speeds common in precision machining.

Key Technical Features for CNC Performance

The technical specifications of this bearing directly impact CNC machine performance. With an inner diameter of 280 mm, it accommodates large spindle shafts while maintaining precise alignment. The double row roller structure distributes loads evenly, reducing stress on individual components and extending bearing life. As a SKF precision bearing, it adheres to strict manufacturing tolerances, ensuring minimal runout and vibration—critical factors for achieving tight machining tolerances and surface finish quality. The cylindrical structure allows for thermal expansion accommodation, maintaining performance stability during extended machining cycles.

Why Authenticity Matters for Your CNC Investment

Choosing genuine SKF bearings over counterfeit alternatives reduces long-term costs significantly. Counterfeit bearings often fail early due to substandard materials and manufacturing, leading to unplanned downtime, damaged spindles, and lost production. Genuine SKF bearings, like the NNU4956B/SPW33, undergo rigorous testing to ensure compliance with ISO 9001 and DIN standards, providing reliable performance and predictable service life. The initial investment in authentic bearings is offset by reduced maintenance costs, fewer production interruptions, and extended equipment lifespan—ultimately lowering your total cost of ownership.

Your Trusted Partner for Precision Bearing Solutions

Packaging & Shipping

• Secure packaging to protect bearing precision during transit
• Fast dispatch from ready stock for urgent maintenance needs
• Global logistics options including DHL, FedEx, and UPS for reliable delivery
• Real-time logistics tracking for full visibility of your shipment
• Minimum order quantity of 1 piece, supporting both emergency repairs and planned maintenance

Get Your CNC Bearing Shipped Today

Don’t let bearing issues disrupt your CNC production schedule. Whether you need a single NNU4956B/SPW33 bearing for emergency repair or want to stock up for future maintenance, we have you covered. Send us your requirements now to get a prompt quote and ensure your machine is back in operation as quickly as possible.

Frequently Asked Questions