SKF GEZ 112 ES Radial Spherical Plain Bearing
The SKF GEZ 112 ES is an inch-size radial spherical plain bearing requiring maintenance with steel/steel sliding contact surfaces. It is designed to accommodate radial loads as well as combined radial and axial loads while compensating for angular misalignment. This robust bearing features lubrication holes and annular grooves in both the inner and outer rings, allowing for easy relubrication to maintain optimal performance in heavy-duty applications.
The SKF GEZ 112 ES is an inch-size radial spherical plain bearing requiring maintenance with steel/steel sliding contact surfaces. It is designed to accommodate radial loads as well as combined radial and axial loads while compensating for angular misalignment. This robust bearing features lubrication holes and annular grooves in both the inner and outer rings, allowing for easy relubrication to maintain optimal performance in heavy-duty applications involving static, alternating, or impact loads.
Key Specifications
Dimensions
| Parameter | Symbol | Value | Unit | Description |
|---|---|---|---|---|
| Bore Diameter | d | 44.45 | mm | Inner diameter (1.75 inches) |
| Outside Diameter | D | 71.438 | mm | Outer diameter (2.8125 inches) |
| Inner Ring Width | B | 38.887 | mm | Width of inner ring (1.531 inches) |
| Outer Ring Width | C | 33.325 | mm | Width of outer ring (1.312 inches) |
| Raceway Diameter (Inner Ring) | d | 63.881 | mm | Diameter of inner ring raceway |
| Lubrication Groove Width (Outer Ring) | b | 4.4 | mm | Width of lubrication groove in outer ring |
| Lubrication Groove Width (Inner Ring) | b | 5 | mm | Width of lubrication groove in inner ring |
| Lubrication Hole Diameter (Outer Ring) | M | 4 | mm | Diameter of lubrication hole in outer ring |
| Bore Chamfer Dimension | r | min. 0.6 | mm | Minimum chamfer dimension of bore |
| Outer Ring Chamfer Dimension | r | min. 1 | mm | Minimum chamfer dimension of outer ring |
Shoulder Dimensions
| Parameter | Symbol | Value | Unit | Description |
|---|---|---|---|---|
| Shaft Shoulder Diameter | d | 48.5-50.7 | mm | Recommended range for shaft shoulder diameter |
| Housing Shoulder Diameter | D | 60.7-67.4 | mm | Recommended range for housing shoulder diameter |
| Shaft Chamfer Radius | r | max. 0.6 | mm | Maximum chamfer radius for shaft |
| Housing Chamfer Radius | r | max. 1 | mm | Maximum chamfer radius for housing |
Performance
| Parameter | Symbol | Value | Unit | Description |
|---|---|---|---|---|
| Basic Dynamic Load Rating | C | 170 | kN | Maximum dynamic load capacity |
| Basic Static Load Rating | C₀ | 510 | kN | Maximum static load capacity |
| Specific Dynamic Load Factor | K | 100 | N/mm² | Specific dynamic load factor |
| Specific Static Load Factor | K₀ | 300 | N/mm² | Specific static load factor |
| Material Constant | K | 330 | - | Material constant for calculation |
| Angle of Tilt | α | 6 | ° | Maximum angular misalignment capacity |
Properties & Materials
| Parameter | Value | Description | |
|---|---|---|---|
| Sliding Contact Surface | Steel/Steel, Standard | Spherical sliding interface for smooth articulation | |
| Inner Ring Material | Bearing Steel | Heat-treated for durability and wear resistance | |
| Outer Ring Material | Bearing Steel | Precision ground for optimal performance | |
| Maintenance Requirement | Relubrication Required | Equipped with grease fitting for periodic lubrication | |
| Lubrication Feature | Groove with Lubrication Holes | Annular grooves in both rings for efficient lubrication distribution | |
| Sealing | Without Seal | Open design for easy lubrication and cleaning | |
| Radial Clearance | CN | Standard radial clearance | |
| Product Net Weight | 0.629 | kg | Mass of the bearing |
Features and Benefits
- Relubricatable Design: Lubrication holes and annular grooves in both rings allow for easy relubrication, extending service life
- 6° Angular Misalignment: Accommodates up to 6° of angular misalignment, reducing stress on connected components
- Heavy Load Capacity: Suitable for heavy static, alternating, or impact loads in demanding industrial applications
- Steel/Steel Construction: Durable bearing steel components ensure reliable operation in harsh environments
- Inch-Size Design: Specifically engineered for inch-size applications, ensuring compatibility with existing systems
- Simple Installation: Ready-to-mount design for quick and easy installation
Application Notes
- 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 spherical plain bearings
- Available with seals (GEZ 112 ES-2RS) or as SKF Explorer performance (GEZ 112 ESX-2LS) for enhanced performance
