SKF 81104 TN Cylindrical Roller Thrust Bearings 20x35x10mm
The SKF 81104 TN is a high-performance single-row, single-direction cylindrical roller thrust bearing produced by SKF, a world-leading provider of bearing solutions and rotating equipment technologies. Engineered to excel in applications with heavy axial loads and limited axial installation space, this bearing offers superior load-carrying capacity compared to thrust ball bearings, while ensuring stable and reliable operation.
The SKF 81104 TN is a high-performance single-row, single-direction cylindrical roller thrust bearing produced by SKF, a world-leading provider of bearing solutions and rotating equipment technologies. Engineered to excel in applications with heavy axial loads and limited axial installation space, this bearing offers superior load-carrying capacity compared to thrust ball bearings, while ensuring stable and reliable operation. It features a fully separable three-component design: an axial cylindrical roller and cage assembly (K 81104 TN), a shaft locating washer (WS 81104), and a housing locating washer (GS 81104). This modular structure simplifies mounting, dismounting, and maintenance, making it a cost-effective choice for a wide range of industrial scenarios.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Bearing Type | Single Row Cylindrical Roller Thrust Bearing, Single Direction | - |
| Inner Diameter (d) | 20 | mm |
| Outer Diameter (D) | 35 | mm |
| Height/Width (H/B) | 10 | mm |
| Cage Material | Glass fiber reinforced polyamide 66 (PA66) - designated by suffix "TN" | - |
| Dynamic Load Rating (Cₐ) | 16.2 | kN |
| Static Load Rating (C₀ₐ) | 38.5 | kN |
| Reference Speed (nθr) | 4,000 | rpm |
| Limiting Speed (nlim) | 7,500 | rpm |
| Temperature Range | -20 to +120 | °C |
| Closure Type | Open | - |
| Bore Type | Parallel | - |
Design Features & Benefits
- Fully Separable ComponentsThe roller-cage assembly, shaft washer, and housing washer can be installed and removed independently. This design not only simplifies on-site maintenance and replacement but also enables component interchangeability within the same series, reducing inventory costs and downtime.
- Exceptional Axial Load CapacityOptimized roller and raceway geometry ensures uniform load distribution, allowing the bearing to withstand heavy single-direction axial loads and moderate impact loads without deformation, delivering high stiffness for precise machinery positioning.
- Space-Efficient Compact DesignWith a slim axial height of only 10 mm, the bearing maximizes load performance in space-constrained equipment, supporting the miniaturization of industrial machinery without sacrificing operational efficiency.
- Durable TN Cage TechnologyThe "TN" suffix denotes a glass fiber reinforced PA66 cage, which offers better wear resistance, lower friction, and superior dimensional stability than standard polyamide cages. It performs well under fluctuating temperature and speed conditions, extending the bearing’s service life.
- Cost-Effective ReliabilitySKF’s precision manufacturing processes ensure consistent quality and tight tolerances. The bearing’s robust construction reduces maintenance frequency, lowering the total cost of ownership for industrial users.
Suffix Explanation
- 811: Core series code for single-row cylindrical roller thrust bearings, representing a design optimized for heavy axial loads with minimal axial space requirements.
- 04: Size code corresponding to an inner diameter of 20 mm, complying with international dimensional standards for the 811 series.
- TN: Designates a glass fiber reinforced polyamide 66 cage, which balances strength, friction reduction, and temperature resistance for general industrial applications.
Typical Applications
The SKF 81104 TN is widely used in light to medium-duty industrial equipment, including:
- Small gearboxes, reducers, and power transmission systems
- Precision machine tool spindles and small CNC machining equipment
- Miniature hydraulic pumps, motors, and compressors
- Small metal forming presses, stamping machines, and packaging machinery
- Conveyor belt idlers and light-duty material handling equipment
- Household appliance motors and small agricultural machinery components
Installation Notes
For optimal performance and extended service life, follow these guidelines:
- Ensure precise alignment of all bearing components during installation to avoid misalignment-induced premature wear and noise.
- Select lubricants suitable for the operating temperature, speed, and load; regular lubrication is recommended for continuous high-speed operation.
- Use SKF-specified mounting tools to prevent scratches or damage to the bearing’s precision raceways and rolling elements.
- Maintain the designed axial clearance or preload according to the equipment’s operational requirements.
- Never apply radial loads—this bearing is engineered exclusively for axial load support; radial loads will cause severe damage.
- Adhere to SKF’s official mounting and dismounting procedures for separable cylindrical roller thrust bearings.
The SKF 81104 TN combines SKF’s engineering expertise with practical design advantages, making it an ideal choice for compact, load-intensive applications across various light to medium industrial sectors.
