High Precision SKF NNU4934BK/SPW33 Cylindrical Roller Bearing for CNC Machine Tools

Product Specifications

Application Industries

Reduce CNC Downtime with Genuine SKF NNU4934BK/SPW33 Cylindrical Roller Bearings

CNC machine operators know the frustration of unexpected spindle failure—hours of production lost, maintenance crews scrambling, and deadlines slipping. Many turn to unauthorized suppliers for quick fixes, only to face premature bearing wear caused by substandard materials or imprecise manufacturing. Sourcing multiple bearing types from different vendors adds coordination headaches and delays, especially when emergency repairs demand immediate parts.

Authentic SKF Bearings, In-Stock for Immediate Delivery

Our High Precision SKF NNU4934BK/SPW33 Cylindrical Roller Bearing eliminates these pain points. As an officially authorized SKF distributor, we guarantee 100% genuine products with full traceability documentation. With P4/P2 precision grade bearings in ready stock, we ensure rapid delivery to minimize your CNC machine downtime. This bearing is specifically engineered for the high radial loads and precise axial alignment required in CNC spindle applications, providing reliable performance under continuous operation.

Engineered for CNC Machine Tool Performance

The NNU4934BK/SPW33 excels in CNC machine tool spindles where high rotational speeds and rigidity are critical. Its cylindrical roller design delivers exceptional radial load capacity, while the single-row configuration ensures precise axial positioning—essential for maintaining machining accuracy. Open seal type minimizes friction in oil-lubricated systems, making it ideal for high-speed applications where heat generation must be controlled. Whether cutting hard metals or fine finishing, this bearing maintains stable performance to keep your production on schedule.

Key Technical Features for Precision Machining

The 170 mm inner diameter of the SKF NNU4934BK/SPW33 provides a robust interface with spindle shafts, ensuring secure mounting and minimal runout. Its cylindrical structure allows for easy installation and alignment, reducing setup time during maintenance. The open design facilitates optimal lubrication flow, critical for heat dissipation in high-speed CNC operations. Each bearing undergoes standardized precision testing before shipment, ensuring compliance with ISO 9001 and DIN standards that govern CNC machine tool components.

Why Genuine SKF Bearings Lower Total Cost of Ownership

Counterfeit bearings may offer lower upfront prices, but they often fail prematurely—costing far more in replacement parts, labor, and unplanned downtime. A single CNC spindle failure can result in thousands of dollars in lost production. Genuine SKF bearings, like the NNU4934BK/SPW33, are manufactured to exacting tolerances, delivering longer service life and consistent performance. Our full-process quality traceability ensures you receive bearings that meet SKF's strict engineering specifications, protecting your equipment investment and reducing long-term maintenance costs.

Why 800+ Global Clients Trust Our Bearing Solutions

Packaging & Shipping

• Original SKF packaging with product certification and traceability documentation
• Protective inner packaging to prevent damage during transit
• 30.00cm * 25.00cm * 25.00cm outer carton with gross weight of 0.300kg
• Express delivery via DHL, FedEx, or UPS for urgent requirements
• Real-time logistics tracking provided for all shipments
• Minimum order quantity: 1 piece, ideal for emergency repairs

Get Your CNC Spindle Back to Work—Order Today

Every minute your CNC machine is down costs money. With our ready stock of genuine SKF NNU4934BK/SPW33 bearings, you can minimize downtime and restore production quickly. Whether you need a single replacement bearing or a stock of spares, we provide the same level of professional service and quality assurance.

Frequently Asked Questions