Koyo NACHI NSK 6918 6919 6920 Deep Groove Ball Bearing

Product Specifications

Application Suitability

Need Reliable 6918, 6919, 6920 Deep Groove Ball Bearings? Avoid Costly Downtime

Finding the right deep groove ball bearings for high-speed applications can be frustrating. Mismatched dimensions lead to installation delays, while low-quality bearings with poor precision cause premature wear, vibration, and unexpected equipment shutdowns. Sourcing from multiple suppliers for different brands only adds complexity to your procurement process.

Engineered for Consistent Performance in Critical Applications

Our 6918, 6919, and 6920 deep groove ball bearings address these challenges with ISO 9001-certified manufacturing and strict quality control. Available in precision grades from P0 to P4 and clearance classes C0/C2/C3, they meet the demands of high-speed industrial machinery, automotive systems, and automation equipment. With rich stock availability across international brand specifications, we simplify your procurement by offering a single source for multiple bearing models.

Optimal Performance in High-Speed, Low-Noise Environments

These bearings excel in applications requiring smooth rotation at high speeds, such as electric motor shafts and precision spindles. The single-row design and 0° contact angle optimize radial load capacity, while the non-aligning structure ensures stability in rigidly mounted systems. Constructed from high-grade bearing steel, they deliver long service life even under continuous operation, making them ideal for 24/7 manufacturing environments.

Key Engineering Features That Impact Reliability

Precision rating directly affects rotational accuracy: P5 and P4 grades minimize runout, critical for CNC machine tools and metering equipment. Clearance selection (C0 standard, C2 tight, C3 loose) allows customization for thermal expansion conditions—C3 is recommended for high-temperature applications like engine components. The unseparated design ensures easy handling during installation, while the choice of grease or oil lubrication provides flexibility for operating speeds and maintenance intervals.

Why Bearing Quality Affects Your Total Operating Costs

Choosing the right deep groove ball bearing goes beyond upfront price. A bearing with substandard material hardness (below industry norms) will wear prematurely, leading to unscheduled downtime and replacement costs. Our bearings undergo rigorous hardness testing and dimensional inspection to ensure they meet load ratings and fatigue life expectations. By reducing failure rates, they lower long-term maintenance expenses and protect against costly damage to adjacent machine components.

Quality You Can Verify Through Transparent Processes

Packaging & Shipping

• Packaged in cartons with palletized options for bulk orders
• Immediate dispatch from rich stock for standard models
• Flexible shipping via express courier, air freight, or sea cargo
• Low minimum order quantity supported for small-batch requirements

Get Your Bearing Quote Today

Whether you need 6918, 6919, 6920, or other deep groove ball bearing models, we can provide pricing and availability quickly. Share your required model number, dimensions (d x D x B), and quantity, and our technical team will confirm compatibility with your application. The sooner you inquire, the sooner we can arrange shipment to keep your operations running smoothly.

Frequently Asked Questions