SKF 81105 TN Cylindrical Roller Thrust Bearings 25x42x11mm
The SKF 81105-TN is a single-row, single-direction cylindrical roller thrust bearing manufactured by SKF, a leading global supplier of bearings and rotating equipment solutions. This high-performance bearing is specifically engineered to handle heavy axial loads and peak impact loads while requiring minimal axial installation space, making it an ideal choice for applications where thrust ball bearings lack sufficient load-carrying capacity.
The SKF 81105-TN is a single-row, single-direction cylindrical roller thrust bearing manufactured by SKF, a leading global supplier of bearings and rotating equipment solutions. This high-performance bearing is specifically engineered to handle heavy axial loads and peak impact loads while requiring minimal axial installation space, making it an ideal choice for applications where thrust ball bearings lack sufficient load-carrying capacity. The bearing features a separable design with three main components: an axial cylindrical roller and cage assembly (K 81105-TN), a shaft locating washer (WS 81105), and a housing locating washer (GS 81105).
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Bearing Type | Single Row Cylindrical Roller Thrust Bearing, Single Direction | - |
| Inner Diameter (d) | 25 | mm |
| Outer Diameter (D) | 42 | mm |
| Height/Width (H/B) | 11 | mm |
| Cage Material | Glass fiber reinforced polyamide 66 (PA66) - designated by suffix "TN" | - |
| Dynamic Load Rating (Ca) | 25 | kN (5,620 lbs) |
| Static Load Rating (C0a) | 69.5 | kN (15,624 lbs) |
| Reference Speed (nθr) | 3,200 | rpm |
| Limiting Speed (nlim) | 6,000 | rpm |
| Temperature Range | -20 to +120 °C | - |
| Closure Type | Open | - |
| Bore Type | Parallel | - |
Design Features & Benefits
- Separable Construction: All three components (roller and cage assembly, shaft washer, housing washer) are fully separable, enabling easy mounting, dismounting, and maintenance, as well as component interchangeability within the same bearing series.
- High Load Capacity: Engineered to accommodate extremely heavy axial loads and shock loads in one direction, providing exceptional stiffness for precise positioning applications.
- Space-Efficient Design: Requires minimal axial space while delivering maximum load-bearing performance, optimizing design flexibility in compact machinery.
- Advanced Cage Technology: The TN suffix indicates a glass fiber reinforced PA66 cage that offers superior wear resistance, low friction, and excellent dimensional stability compared to standard polyamide cages.
- Insensitivity to Shock Loads: Robust construction makes it highly resistant to impact and peak loads, ensuring reliable operation in demanding industrial environments.
- Cost-Effective Solution: Provides a durable, long-lasting performance with minimal maintenance requirements, reducing total cost of ownership.
Suffix Explanation
- 811: Base series designation for single row cylindrical roller thrust bearings
- 05: Size code corresponding to 25 mm inner diameter
- -TN: Designates a glass fiber reinforced polyamide 66 (PA66) cage, providing enhanced strength and durability compared to standard cages
Typical Applications
The SKF 81105-TN excels in a wide range of industrial applications including:
- Gearboxes and transmissions requiring high axial load support
- Machine tool spindles for precise positioning
- Hydraulic pumps and motors operating under heavy load conditions
- Presses, forming machines, and stamping equipment
- Conveyor systems and material handling machinery
- Heavy-duty agricultural and construction equipment
- Marine propulsion systems and shipboard machinery
Installation Notes
For optimal performance and extended service life:
- Ensure proper alignment of all bearing components during installation to prevent misalignment and premature wear
- Apply appropriate lubrication based on operating conditions (temperature, speed, load, and environmental factors)
- Use correct mounting tools to avoid damage to bearing surfaces and components
- Maintain specified clearance or preload as per application requirements
- Never subject the bearing to radial loads, as cylindrical roller thrust bearings are designed exclusively for axial load applications
- Follow SKF's recommended mounting and dismounting procedures for separable bearings
The SKF 81105-TN represents the perfect balance of performance, durability, and space efficiency, delivering reliable operation in even the most demanding axial load applications while maintaining the high quality and engineering excellence that SKF is globally renowned for.
