INA ZARF50140-L-TV Needle Roller/Axial Cylindrical Roller Bearings 50x140x103mm
The INA ZARF50140-L-TV is a high-performance combination bearing specifically designed for precision ball screw support applications in machine tools and industrial machinery. It combines the functions of a needle roller bearing for radial load support and an axial cylindrical roller bearing for bidirectional thrust load handling, making it an ideal solution for demanding drive systems that require both high rigidity and precision movement.
The INA ZARF50140-L-TV is a high-performance combination bearing specifically designed for precision ball screw support applications in machine tools and industrial machinery. It combines the functions of a needle roller bearing for radial load support and an axial cylindrical roller bearing for bidirectional thrust load handling, making it an ideal solution for demanding drive systems that require both high rigidity and precision movement.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Model Number | ZARF50140-L-TV | - ZARF: Basic series designation for combined needle/axial cylindrical roller bearings- 50: Inner diameter (d) = 50 mm- 140: Outer diameter (D) = 140 mm- L: With locating washer- TV: Full complement (no cage) design for maximum load capacity |
| Dimensions | 50 × 140 × 103 mm | Standard bearing dimensions (d × D × B) |
| Bearing Type | Needle Roller/Axial Cylindrical Roller Combination Bearing | Double-direction thrust capability with radial support |
| Load Capacity | High | Optimized for heavy axial loads in both directions and moderate radial loads |
| Design Features | Full complement (TV), with locating washer (L) | Enhanced load capacity compared to caged versions; locating washer ensures precise positioning |
| Material & Quality | Premium bearing steel | Manufactured to ISO P0 (ABEC 1) precision class for reliable performance |
| Weight | Approximately 4.2 kg | Typical weight for this size class |
Technical Advantages
- Combined Load Support: Integrates radial needle roller bearing and bidirectional axial cylindrical roller bearing in one compact unit, reducing assembly complexity and space requirements
- High Rigidity: Full complement design (TV) provides maximum number of rolling elements, ensuring exceptional rigidity for precision positioning applications
- Precise Positioning: The L version includes a locating washer that guarantees accurate axial positioning and simplifies mounting in bearing arrangements
- Low Friction: Optimized raceway geometry minimizes friction, contributing to energy efficiency and extended service life
- Easy Maintenance: Designed for simple installation and replacement in standard ball screw bearing configurations
Applications
The ZARF50140-L-TV is primarily used in:
- Precision machine tools (milling, turning, grinding machines)
- Industrial robots and automation systems
- High-precision linear motion systems
- Ball screw drives in CNC machinery
- Heavy-duty positioning equipment requiring both radial and axial rigidity
Installation Notes
- This bearing is typically mounted in pairs (often with a ZARF50140TN or similar) to create a complete ball screw support arrangement
- The locating washer (L) should be positioned against the shoulder of the shaft for accurate axial location
- Proper lubrication with high-quality grease or oil is essential for achieving optimal performance and service life
- The TV designation indicates a full complement design, which may require special consideration for lubrication distribution compared to caged bearings
