INA F-207665.RNA Needle Roller Bearings 27.5x36x16mm
The INA F-207665.RNA is a high-precision single-row needle roller bearing manufactured by Schaeffler Group's INA brand, a global leader in rolling bearing technology. This specialized bearing is particularly designed for demanding applications requiring high radial load capacity in compact spaces, most notably as a critical component in Heidelberg printing machines, where it serves essential functions in paper feed and delivery mechanisms, cam systems, and roller guidance. It is also widely used
The INA F-207665.RNA is a high-precision single-row needle roller bearing manufactured by Schaeffler Group's INA brand, a global leader in rolling bearing technology. This specialized bearing is particularly designed for demanding applications requiring high radial load capacity in compact spaces, most notably as a critical component in Heidelberg printing machines, where it serves essential functions in paper feed and delivery mechanisms, cam systems, and roller guidance. It is also widely used in gearboxes and other industrial machinery requiring reliable motion control.
Technical Specifications
| Parameter | Value |
|---|---|
| Bearing Type | Single-row needle roller bearing without inner ring (RNA type) |
| Designation | F-207665.RNA (equivalent to RNA27.5x36x16) |
| Dimensions | 27.5 mm (bore diameter) × 36 mm (outer diameter) × 16 mm (width) |
| Weight | 0.10 kg |
| Configuration | Full complement (without cage) for maximum load capacity |
| Running Surface | Standard crowned outer ring to accommodate misalignment and reduce edge stress |
| Material | Chrome steel (59-63 HRC hardness) for optimal durability and load capacity |
| Application | Heidelberg printing machines, gearboxes, and various industrial equipment |
| Origin | Slovakia (manufactured to INA's exacting German quality standards) |
Design Features & Performance Benefits
- Exceptional Radial Load Capacity: Full complement needle roller design maximizes the number of rolling elements, enabling it to withstand substantial radial loads while minimizing distortion and bending stresses.
- Space-Saving Design: As an RNA-type bearing without an inner ring, it offers a compact solution where space is limited, allowing for more efficient use of available installation area.
- Cost-Effective Solution: Eliminating the inner ring reduces material costs while maintaining performance, making it an economical choice for high-volume applications.
- Crowned Running Surface: The outer ring is crowned to reduce edge stress and wear in applications where slight tilting relative to the track may occur, extending service life.
- Direct Shaft Contact: Since there is no inner ring, the needle rollers contact the shaft directly, requiring the shaft to have the same precision and hardness as a bearing inner ring (58-62 HRC).
- High Rigidity: Thick-walled outer ring construction provides excellent rigidity, ensuring stable performance even under heavy loads.
Model Designation Breakdown
- F-207665: INA's specific product number for this needle roller bearing variant
- RNA: Design code indicating:
- R: Roller bearing (needle type)
- N: Without inner ring
- A: Standard design
Applications
The F-207665.RNA is primarily designed for use in:
- Heidelberg Printing Machines: Specifically engineered as a replacement part for various Heidelberg offset printing presses, where it ensures smooth and reliable motion in critical paper handling systems.
- Gearboxes: Ideal for gearbox applications requiring high radial load capacity in compact spaces, such as automotive transmissions and industrial gear systems.
- General Industrial Use: Conveyor systems, linear guidance mechanisms, cam-driven machinery, and other applications requiring precise, low-friction motion with high load capacity in limited installation space.
- Textile Machinery: Suitable for various textile equipment requiring reliable motion control and high load capacity.
Operational Considerations
- Mounted directly on a precision-ground shaft (shaft diameter: 27.5 mm) with appropriate surface finish and hardness
- Pre-lubricated with high-performance grease for initial operation; relubrication recommended for long-term use
- Operating temperature range: -30°C to +120°C (standard configuration)
- Ideal for moderate to high-speed applications with proper lubrication and maintenance
- Requires precise shaft alignment to ensure optimal performance and extended service life
This INA needle roller bearing represents a perfect balance of precision engineering, durability, and space efficiency, making it a preferred choice for demanding industrial applications worldwide, particularly in the printing and gearbox industries where reliability and performance directly impact production efficiency.
