NSK High Precision Double Row Cylindrical Roller Bearings NN3014TBKRCC0P5 70x110x30mm
The NSK NN3014TBKRCC0P5 is a premium high-precision double-row cylindrical roller bearing engineered with an inner ring featuring three ribs, optimized for applications demanding exceptional rigidity, rotational accuracy, and reliability such as high-performance machine tool spindles, precision rotary tables, and industrial robot joints. This bearing combines advanced materials and innovative design to deliver superior performance in challenging operating conditions.
The NSK NN3014TBKRCC0P5 is a premium high-precision double-row cylindrical roller bearing engineered with an inner ring featuring three ribs, optimized for applications demanding exceptional rigidity, rotational accuracy, and reliability such as high-performance machine tool spindles, precision rotary tables, and industrial robot joints. This bearing combines advanced materials and innovative design to deliver superior performance in challenging operating conditions.
Core Attributes & Designation Breakdown
| Code | Meaning |
|---|---|
| NN | Double-row cylindrical roller bearing with triple-ribbed inner ring (fixed-end bearing capability) |
| 3014 | Size series (30) + bore diameter code (14 = 70 mm, calculated as 14×5) |
| TB | Resin cage with optimized roller guidance (enhanced lubrication retention, reduced friction) |
| KR | Tapered bore with 1:12 taper ratio (enables interference fit installation, adjustable internal clearance) |
| CC0 | Special radial internal clearance for precision applications (lower than standard CC1) |
| P5 | ISO Class 5 precision (equivalent to ABEC5), ensuring high rotational accuracy and smooth operation |
Key Specifications
| Parameter | Value |
|---|---|
| Bore diameter (d) | 70 mm |
| Outer diameter (D) | 110 mm |
| Width (B) | 30 mm |
| Minimum chamfer (r) | 1.1 mm |
| Basic dynamic load rating (Cr) | 112 kN |
| Basic static load rating (C0r) | 148 kN |
| Limiting speed (grease lubrication) | 6,300 min⁻¹ |
| Limiting speed (oil lubrication) | 9,000 min⁻¹ |
| Weight | 1.2 kg |
Performance Advantages
- Exceptional Rigidity: Double-row cylindrical roller design provides maximum radial rigidity, minimizing deformation under heavy loads and ensuring precise machining accuracy.
- Precision Engineering: P5 precision grade combined with CC0 clearance delivers ultra-low runout and consistent performance at high speeds, essential for tight-tolerance applications.
- Optimized Lubrication: TB resin cage design enhances lubricant distribution, reducing heat generation and extending bearing service life.
- Easy Installation & Adjustment: KR tapered bore (1:12) allows for simple interference fit assembly using adapter sleeves, enabling fine-tuning of internal clearance to match specific application requirements.
- Low Noise & Vibration: Advanced cage geometry and precision manufacturing ensure quiet operation and minimal vibration, improving overall machine performance.
- High Load Capacity: Line contact between rollers and raceways enables efficient distribution of heavy radial loads, supporting high-power machinery operations.
Application Scenarios
This bearing is ideally suited for:
- High-precision machine tool spindles (milling, turning, grinding centers)
- Precision rotary tables and indexing units
- Industrial robot joints and actuators
- High-speed test equipment and measuring instruments
- Heavy-duty gearboxes requiring precise alignment and rigidity
- Printing and paper processing machinery demanding consistent performance
Installation & Maintenance Guidelines
- Mounting: Use appropriate adapter sleeves for tapered bore installation. Apply even pressure to avoid damage to bearing components or shaft surfaces.
- Clearance Adjustment: Utilize the tapered bore feature to set optimal internal clearance based on operating temperature and load conditions.
- Lubrication: Select high-quality lubricants compatible with operating speed and temperature. Regularly monitor lubricant condition and replace as needed to maintain performance.
- Contamination Prevention: Ensure a clean environment during installation and operation. Use proper sealing solutions to protect against dust, moisture, and other contaminants.
- Handling: Employ specialized tools to avoid direct contact with rolling elements or raceways, preserving the bearing's precision finish.
