High Precision Double Row Cylindrical Roller Bearing Nn3007K Nn3008K Nn3009K P5 P4 W33

Product Specifications

Application Suitability

Need Reliable Nn3007K-Nn3009K Double Row Cylindrical Roller Bearings? Here’s What Matters

Finding the right double row cylindrical roller bearings for high-precision applications can be challenging. Many buyers struggle with mismatched dimensions between different manufacturers, or receive bearings that fail prematurely due to poor material quality. Sourcing from multiple suppliers to compare options only adds time and complexity to your procurement process.

Engineered for Consistent Performance in Demanding Environments

Our double row cylindrical roller bearings (Nn3007K, Nn3008K, Nn3009K) are designed to address these common pain points. Produced under ISO 9001 certified processes, these bearings meet P4/P5 precision standards to ensure interchangeability with major international dimensions. With a comprehensive inventory of both our own brand and leading global brands, we can fulfill your requirements quickly—whether you need a single unit or bulk order for critical machinery like steel rolling mills or automated production lines.

Optimal Performance in High-Rigidity Applications

These bearings excel in applications requiring high radial load capacity and rigidity. The double row design distributes loads evenly across rolling elements, making them ideal for heavy-duty gearboxes and machine tool spindles operating at moderate to high speeds. The W33 oil groove and hole configuration allows for efficient lubrication circulation, critical in continuous operation scenarios where maintenance intervals are extended.

Key Engineering Features That Impact Performance

Precision class directly affects operational stability: P5 grade bearings maintain tighter tolerances for runout and dimension control, reducing vibration in high-speed applications. The K-type tapered bore design simplifies mounting on stepped shafts, ensuring proper alignment and load distribution. Raw material selection includes high-carbon chromium steel with uniform hardness (typically HRC 58-62) to resist wear and fatigue under cyclic loading. Each bearing undergoes dimensional inspection post-assembly to verify bore diameter, outer diameter, and width meet specified tolerances.

Why Precision Bearings Reduce Total Cost of Ownership

Choosing the right cylindrical roller bearing impacts more than initial purchase price. A bearing with insufficient precision can cause excessive shaft wear, leading to premature equipment failure and unplanned downtime. Our P4/P5 grade bearings minimize vibration-induced stress on adjacent components, extending the service life of gearboxes and spindles. While cheaper alternatives may save money upfront, they often require more frequent replacement—doubling maintenance labor costs and production losses over time.

Quality Assurance You Can Verify

Packaging & Shipping

• Standard industrial packaging with protective grease coating
• Same-day dispatch for in-stock items
• Flexible delivery options: express courier, air freight, or sea shipping
• Low minimum order quantity—supports both trial runs and full production needs

Get Your Bearing Quote Today

Whether you need Nn3007K, Nn3008K, Nn3009K, or other cylindrical roller bearing models, provide your required dimensions, precision class, and quantity. Our team will confirm stock availability and deliver a competitive quote within 24 hours. Early order confirmation ensures priority handling and faster delivery to keep your production on schedule.

Frequently Asked Questions