Double Row Cylindrical Roller Bearing NNU4944 B/Sp C3 W33 for Industrial Machinery High Precision

Product Specifications

Application Industries

Prevent Costly Downtime with NNU4944 B/Sp Double Row Cylindrical Roller Bearing

Industrial machinery operators know the frustration of unexpected bearing failures—downtime that halts production lines, increases maintenance costs, and erodes profits. When low-precision or counterfeit bearings fail prematurely in critical equipment like gearboxes or printing presses, the impact ripples through your entire operation. Sourcing reliable, high-precision bearings that meet your exact specifications shouldn’t add to the stress.

Engineered for High-Precision Industrial Performance

The Double Row Cylindrical Roller Bearing NNU4944 B/Sp is designed to address these challenges head-on. With precision grades from P0 to P4 and noise grades Z2/Z3/Z4, this bearing delivers stable performance in demanding industrial environments. Our one-stop service covers everything from custom clearance adjustments (C3 as standard, with C0/C2/C4/C5 options) to tailored cage materials (brass or steel), ensuring seamless integration with your machinery. Whether for CNC machine spindles or heavy-duty reducers, this bearing meets the rigorous standards of industrial equipment manufacturers.

Optimized for Heavy Loads and Continuous Operation

This Double Row Cylindrical Roller Bearing excels in applications requiring high radial load capacity and precise axial alignment. Its separated design allows for easy mounting and dismounting, simplifying maintenance in tight spaces. With a hardness of 60-64 HRC, the bearing withstands the wear and tear of continuous operation, making it ideal for industrial machinery operating under heavy loads and variable speeds. Choosing the right bearing directly impacts equipment lifespan and operational efficiency—compromising on quality here leads to frequent replacements and unplanned downtime.

Key Technical Features That Drive Reliability

The NNU4944 B/Sp bearing’s performance is defined by critical technical attributes. Its C3 clearance ensures optimal internal play, reducing heat generation during high-speed rotation and accommodating thermal expansion in large machinery. The brass or steel cage maintains uniform roller spacing, minimizing vibration (Z2V2/Z3V3 grades available) and extending service life. The bearing’s medium and large outer dimension (120-190mm) balances load capacity with compact design, fitting seamlessly into industrial gearboxes and transmission systems. Each parameter is engineered to work in harmony, delivering the precision and durability required for modern industrial applications.

Why Authenticity Matters for Your Bottom Line

Counterfeit bearings may offer lower upfront costs, but they come with hidden risks: inconsistent material quality, imprecise machining, and lack of quality control. These issues lead to early failure, costing far more in replacement parts, labor, and production losses than the initial savings. Our bearings meet ISO, ABMA, and DIN international standards, with strict incoming material inspections and full-process production supervision. By choosing genuine High Precision Roller Bearings, you avoid the hidden costs of counterfeits and ensure long-term reliability in your equipment.

Our Commitment to Your Success

Packaging & Shipping

• Secure carton and pallet packaging to prevent damage during transit
• Sample orders shipped within 3-5 working days; bulk orders within 5-15 working days
• Multiple logistics options available, including express, air, and sea freight
• Real-time tracking provided for all shipments
• 1 piece MOQ for standard bearings, with customized order quantities negotiable

Get the Right Bearing for Your Machinery Today

Don’t let bearing issues slow down your production. Whether you need a single replacement or bulk order, we’re ready to deliver the NNU4944 B/Sp Double Row Cylindrical Roller Bearing you need. Send us your application details, and our technical team will ensure the bearing matches your equipment requirements—helping you minimize downtime and maximize efficiency.

Frequently Asked Questions