SKF 81117 TN Cylindrical Roller Thrust Bearing
The SKF 81117 TN is a high-performance single-row, single-direction cylindrical roller thrust bearing, engineered and manufactured by SKF — a global leader in bearing solutions and rotating equipment technologies. This bearing is optimized to withstand heavy axial loads and moderate impact loads, while its compact structure requires minimal axial installation space, making it a superior alternative to thrust ball bearings in load-intensive applications.
The SKF 81117 TN is a high-performance single-row, single-direction cylindrical roller thrust bearing, engineered and manufactured by SKF— a global leader in bearing solutions and rotating equipment technologies. This bearing is optimized to withstand heavy axial loads and moderate impact loads, while its compact structure requires minimal axial installation space, making it a superior alternative to thrust ball bearings in load-intensive applications. It features a fully separable design composed of three core components: an axial cylindrical roller and cage assembly (K 81117 TN), a shaft locating washer (WS 81117), and a housing locating washer (GS 81117).
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Bearing Type | Single Row Cylindrical Roller Thrust Bearing, Single Direction | - |
| Inner Diameter (d) | 85 | mm |
| Outer Diameter (D) | 110 | mm |
| Height/Width (H/B) | 19 | mm |
| Cage Material | Glass fiber reinforced polyamide 66 (PA66) - designated by suffix "TN" | - |
| Dynamic Load Rating (Cₐ) | 125 | kN |
| Static Load Rating (C₀ₐ) | 305 | kN |
| Reference Speed (nθr) | 1,600 | rpm |
| Limiting Speed (nlim) | 3,000 | rpm |
| Temperature Range | -20 to +120 °C | - |
| Closure Type | Open | - |
| Bore Type | Parallel | - |
Design Features & Benefits
- Fully Separable Components: The roller-cage assembly, shaft washer and housing washer can be mounted and dismounted independently, simplifying installation, maintenance and replacement, and enabling component interchangeability within the same bearing series.
- Exceptional Load Capacity: Engineered to handle heavy axial loads in a single direction, with strong resistance to peak impact loads, ensuring high stiffness and precise positioning for machinery.
- Space-Efficient Design: Delivers maximum load-bearing performance in a compact axial footprint, optimizing design flexibility for space-constrained equipment.
- Durable TN Cage: The TN suffix denotes a glass fiber reinforced PA66 cage, which offers enhanced wear resistance, low friction coefficient and excellent dimensional stability compared to standard polyamide cages, even under fluctuating temperatures.
- Cost-Effective Reliability: Robust construction reduces maintenance frequency and extends service life, lowering the total cost of ownership for industrial users.
Suffix Explanation
- 811: Core series code for single-row cylindrical roller thrust bearings, representing the bearing’s basic structural design.
- 17: Size code corresponding to an 85 mm inner diameter, matching the dimensional standards of the 811 series.
- TN: Specifies a glass fiber reinforced polyamide 66 (PA66) cage, providing better mechanical strength and thermal stability than unreinforced polyamide cages.
Typical Applications
The SKF 81117 TN is widely used in demanding industrial scenarios, including:
- Heavy-duty gearboxes and industrial transmissions
- High-precision machine tool spindles and machining centers
- Hydraulic pumps, motors and compressors under high load conditions
- Metal forming presses, forging machines and stamping equipment
- Conveyor systems and heavy material handling machinery
- Construction machinery, agricultural equipment and mining gear
- Marine propulsion systems and shipboard power equipment
Installation Notes
For optimal performance and extended service life, follow these guidelines:
- Ensure accurate alignment of all bearing components during installation to avoid misalignment-induced premature wear.
- Select lubricants suitable for the operating temperature, speed and load; regular lubrication maintenance is recommended for continuous operation.
- Use specialized mounting tools to prevent damage to the bearing’s rolling surfaces and precision components.
- Maintain the specified axial clearance or preload according to the equipment’s operating requirements.
- Do not apply radial loads— this bearing is designed exclusively for axial load applications.
- Adhere to SKF’s official mounting and dismounting procedures for separable cylindrical roller thrust bearings.
The SKF 81117 TN embodies SKF’s engineering excellence, balancing high load capacity, space efficiency and long-term reliability, making it an ideal choice for heavy-duty axial load applications across various industries.
