INA HK2520-2RS Drawn Cup Needle Roller Bearings 25x32x20mm
The INA HK2520-2RS is a high-performance drawn cup needle roller bearing with double-sided seals, manufactured by Schaeffler Group's INA brand—a global benchmark for precision rolling bearing technology. Engineered for applications requiring high radial load capacity in extremely compact spaces, this bearing eliminates the need for a separate inner ring (operating directly with a precision-machined shaft) and delivers reliable, low-friction performance across industrial and automotive scenarios.
The INA HK2520-2RS is a high-performance drawn cup needle roller bearing with double-sided seals, manufactured by Schaeffler Group’s INA brand—a global benchmark for precision rolling bearing technology. Engineered for applications requiring high radial load capacity in extremely compact spaces, this bearing eliminates the need for a separate inner ring (operating directly with a precision-machined shaft) and delivers reliable, low-friction performance across industrial and automotive scenarios.
Technical Specifications
| Parameter | Value |
|---|---|
| Bearing Type | Drawn cup needle roller bearing, without inner ring |
| Model Designation | HK2520-2RS |
| Dimensions (d×D×B) | 25 mm (bore diameter) × 32 mm (outer diameter) × 20 mm (width) |
| Seal Configuration | 2RS - Double-sided rubber seals (contact type) |
| Material | - Outer cup: High-quality carbon steel- Needle rollers: Chrome steel (59-63 HRC hardness)- Seals: Nitrile rubber (NBR) for broad chemical compatibility |
| Precision Class | ISO P0 (ABEC 1) |
| Weight | Approximately 0.045 kg |
| Radial Load Capacity (Static) | 22.8 kN |
| Radial Load Capacity (Dynamic) | 15.6 kN |
| Operating Temperature Range | -30°C to +100°C (standard NBR seals) |
Model Designation Breakdown
- HK: Standard prefix for INA drawn cup needle roller bearings (without inner ring)
- 25: Inner bore diameter = 25 mm (matches the mating shaft diameter)
- 20: Bearing width = 20 mm
- 2RS: Double-sided rubber seals for contamination protection and lubricant retention
Design Features & Performance Benefits
- Space-Saving Compact DesignThe thin-walled drawn cup structure minimizes radial and axial installation space, making it ideal for weight-sensitive and space-restricted equipment such as gearboxes and small motors.
- Enhanced Contamination ProtectionDouble-sided 2RS rubber seals create a tight barrier against dust, dirt, and moisture ingress, while also retaining pre-filled lubricant. This reduces maintenance frequency and extends service life in harsh operating environments.
- High Radial Load CapacityFull complement needle roller arrangement maximizes the number of rolling elements, enabling the bearing to withstand heavy radial loads (no axial load capacity) without deformation.
- Low Friction OperationPrecision-ground needle rollers and optimized raceway geometry minimize friction and heat generation, improving energy efficiency and reducing wear.
- Cost-Effective & Easy InstallationEliminates the need for an inner ring—operates directly with a precision-machined shaft (requires shaft hardness ≥ 58 HRC and surface roughness Ra ≤ 0.8 μm). Press-fit installation simplifies assembly processes.
Applications
The HK2520-2RS is widely used in:
- Automotive Industry: Transmission systems, starter motors, windshield wiper mechanisms, and suspension components
- Industrial Machinery: Small gearboxes, textile machinery, printing equipment, and conveyor systems
- Household & Commercial Appliances: Washing machine drive systems, air conditioning compressors, and office equipment (e.g., copiers, printers)
- Power Tools: Drill motors, grinders, and other handheld power equipment requiring compact, high-load bearings
Operational Considerations
- Lubrication: Pre-filled with high-performance lithium grease at the factory; relubrication is generally not required for standard applications
- Shaft Requirements: Mating shaft must be precision-ground to ensure optimal contact with needle rollers and prevent premature wear
- Mounting Note: For press-fit installation, apply light pressure to the outer cup only—avoid force on the seals or needle rollers
- Limitations: Not suitable for applications with axial loads or high-speed rotational motion exceeding the manufacturer’s recommended limits
This INA drawn cup needle roller bearing balances compactness, load capacity, and durability, making it a cost-effective solution for a wide range of light to medium-duty industrial and automotive applications.
