High Precision Double Row Cylindrical Roller Bearing NN3034K NN3036K NN3038K P5 P4 W33

Product Specifications

Application Suitability

Struggling with Precision Roller Bearing Selection? Here’s What You Need to Know

Many maintenance engineers face the frustration of bearing failures due to incorrect precision class or inadequate load capacity. Sourcing specific double row cylindrical roller bearings across multiple brands often means juggling different suppliers and inconsistent lead times. When dealing with critical equipment like rolling mills or wind turbines, these delays can cascade into costly production downtime.

Engineered for High-Precision Industrial Applications

Our double row cylindrical roller bearings (NN3034K, NN3036K, NN3038K) address these challenges through ISO 9001-certified manufacturing processes and strict quality control. Available in P4 and P5 precision classes with W33 lubrication grooves, these bearings deliver consistent performance in heavy-load applications. With access to both our own production and major international brands, we streamline your procurement process by offering a single source for all bearing requirements.

Optimal Performance in Heavy-Load Rotating Equipment

These cylindrical roller bearings excel in applications with high radial loads and moderate axial loads, such as gearbox input shafts and mill stands. The double row design provides increased rigidity and load capacity compared to single row alternatives, making them ideal for machinery operating at moderate to high speeds. The W33 feature ensures efficient lubrication distribution, critical for extending service life in continuous operation environments.

Key Engineering Features Explained

The NN design with a tapered bore (K suffix) allows for easy mounting and dismounting using adapter sleeves, simplifying maintenance procedures. P4 precision class ensures minimal runout and vibration, essential for precision machinery where rotational accuracy directly impacts product quality. The rollers are guided by integral flanges on both inner and outer rings, maintaining alignment even under dynamic load conditions. Heat-treated bearing steel construction provides the necessary surface hardness (typically 58-62 HRC) to resist wear and fatigue in demanding industrial settings.

Why Precision Bearings Reduce Total Cost of Ownership

Selecting the correct precision roller bearing directly impacts equipment reliability and maintenance costs. Under-specifying precision can lead to premature wear and vibration-related failures, while over-specifying increases initial costs unnecessarily. Our P4/P5 class bearings strike the optimal balance for most industrial applications, delivering longer service intervals and reduced downtime compared to lower precision alternatives. By following ISO 281 fatigue life calculations during selection, we help ensure your equipment achieves its designed operational lifespan without unexpected bearing replacements.

Quality Assurance You Can Trust

Packaging & Shipping

• Industrial-grade cardboard boxes with protective internal packaging
• Same-day shipping for in-stock items
• Flexible logistics options including express courier, air freight, and sea shipping
• Low minimum order quantity, suitable for both maintenance replacements and production runs

Get Your Roller Bearing Quote Today

Provide your specific bearing model (NN3034K, NN3036K, or NN3038K), required precision class (P4/P5), and quantity, and we’ll deliver competitive pricing with clear lead time information. We also welcome inquiries for equivalent bearings across other major brands, ensuring you get the right product for your application without brand restrictions.

Frequently Asked Questions