SKF SIQG 40 ES Female Rod End Bearing with Clamping Screws
The SKF SIQG 40 ES is a female thread type spherical plain rod end bearing featuring a right-hand thread configuration and slotted shank with clamping screws. It incorporates a steel/steel sliding contact spherical plain bearing with extended inner rings on both sides, designed to accommodate angular misalignment (up to 4°) while transmitting heavy static, alternating, or impact loads between connected components.
The SKF SIQG 40 ES is a female thread type spherical plain rod end bearing featuring a right-hand thread configuration and slotted shank with clamping screws. It incorporates a steel/steel sliding contact spherical plain bearing with extended inner rings on both sides, designed to accommodate angular misalignment (up to 4°) while transmitting heavy static, alternating, or impact loads between connected components. This maintenance-required bearing can be easily relubricated via grease fitting in the housing and shaft (for sizes 16 and larger), making it ideal for hydraulic cylinders, mechanical linkages, and other industrial applications requiring reliable articulating movement.
Key Specifications
Dimensions
| Parameter | Symbol | Value | Unit | Description |
|---|---|---|---|---|
| Bore Diameter | d | 40 | mm | Inner diameter of bearing inner ring |
| Outside Diameter, Housing Eye | d₂ | max. 91.5 | mm | Diameter of housing eye |
| Width, Bearing Inner Ring | B | 40 | mm | Width of inner ring |
| Thread Designation | G | M33×2 | - | Metric female thread with 33mm diameter and 2mm pitch |
| Width, Housing Eye | C₁ | max. 34 | mm | Width of housing eye |
| Centre Height, Housing | h₁ | 97 | mm | Height from end of shank to centre of rod end eye |
| Housing Length, Total | l₄ | max. 146.5 | mm | Total length (height) of housing |
| Raceway Diameter, Inner Ring | dₖ | 53 | mm | Raceway diameter of inner ring |
| Housing Diameter, Shank | d₄ | max. 49 | mm | Diameter of housing shank |
| Length, Thread | l₃ | min. 46 | mm | Length of threaded section |
| Distance, Shank Chamfer to Centre | l₇ | min. 40 | mm | Distance from shank chamfer to centre of rod end eye |
| Width, Shank | N | max. 82 | mm | Width of shank |
| Thickness, Shank Base | N₁ | max. 28 | mm | Thickness of shank base for clamping bolts |
| Chamfer Dimension, Bore | r₁ | min. 0.6 | mm | Chamfer dimension of bore |
Performance
| Parameter | Symbol | Value | Unit | Description |
|---|---|---|---|---|
| Basic Dynamic Load Rating | C | 100 | kN | Maximum dynamic load capacity |
| Basic Static Load Rating | C₀ | 176 | kN | Maximum static load capacity |
| Angle of Tilt | α | 4 | ° | Maximum angular misalignment capacity |
| Specific Dynamic Load Factor | K | 100 | N/mm² | Specific dynamic load factor |
| Material Constant | Kₘ | 330 | - | Material constant for calculation |
Properties & Materials
| Parameter | Value | Description | |
|---|---|---|---|
| Sliding Contact Surface | Steel/steel, standard | Spherical sliding interface for smooth articulation | |
| Housing Material | Steel | Robust construction for heavy loads | |
| Inner Ring Material | Bearing steel | Heat-treated for durability | |
| Outer Ring Material | Bearing steel | Precision ground for optimal performance | |
| Maintenance Requirement | Relubrication required | Equipped with grease fitting for periodic lubrication | |
| Attachment Feature | Right-hand female thread with clamping screws | Slotted shank design for secure mounting | |
| Sealing | Without | Open design for easy lubrication | |
| Product Net Weight | 2.07 | kg | Mass of the bearing |
Clamping Bolts
| Parameter | Value | Unit | Description |
|---|---|---|---|
| Size of Hexagon Socket Bolts | M10 | - | Size of clamping bolts |
| Tightening Torque | 48 | N·m | Recommended torque for clamping bolts |
Features and Benefits
- Slotted Shank with Clamping Screws: Provides secure and adjustable mounting, ideal for hydraulic cylinder applications
- Dual Lubrication Points: Can be relubricated via grease fitting in the housing and shaft (for sizes 16 and larger)
- Heavy Load Capacity: Suitable for heavy static, alternating, or impact loads
- 4° Angular Misalignment: Accommodates up to 4° of angular misalignment, reducing stress on connected components
- Steel/Steel Construction: Durable steel components ensure reliable operation in harsh environments
- Exchangeable Bearing: Bearing can be easily exchanged when needed, extending service life of the housing
- Simple Installation: Ready-to-mount design for quick and easy installation
Application Notes
- Right-hand thread is standard for SIQG series bearings; use SILG 40 ES for left-hand thread configuration
- Recommended operating temperature range: -20°C to +120°C (with standard lubricants)
- Regular lubrication intervals depend on operating conditions (load, speed, temperature)
- For maintenance-free alternatives, consider SKF's PTFE-lined rod end bearings
