UC311 Insert Spherical Bearing
The DUHUI Bearing UC311 insert spherical bearing is an OE-spec replacement component for heavy-duty industrial, agricultural, and material handling equipment. This wide inner ring ball bearing features a spherical outer diameter for self-alignment in mounted bearing assemblies, compensating for shaft misalignment in demanding applications. Manufactured to match original equipment specifications including UC311, this unit delivers reliable performance for heavy-duty mounted bearing applications.
Technical Specifications
| Specification | Value / Detail |
|---|---|
| DH Code | DBK118 |
| Part Number | UC311 |
| Bore Diameter (d) | 55.00 mm (2.165 inch) |
| Outside Diameter (DSP) | 120.00 mm (4.724 inch) |
| Width (B) | 66.00 mm (2.598 inch) |
| Outer Ring Width (C) | 34.00 mm (1.339 inch) |
| Distance Raceway (S) | 25.00 mm (0.984 inch) |
| Grease Fitting (g) | 41.00 mm (1.614 inch) |
| Grease Fitting Thread (ds) | M12×1.5 |
| Dynamic Load Rating (Cr) | 71,500 N (16,073 lbf) |
| Static Load Rating (C0r) | 45,000 N (10,116 lbf) |
| Locking Type | Set Screw (2 Screws) |
| Seal Type | Double Sealed (RSR on both sides) |
| Weight | 2.30 kg (5.07 lb) |
| Temperature Range | -20 to 100 °C (-4 to 212 °F) |
Important: All information on this page is for reference only. Please verify OE numbers, dimensions, and vehicle fitment against your original part before ordering. Contact us for fitment confirmation.
DH Code & OE Numbers & Reference Numbers
DH Code: DBK118
OE Numbers: UC311, UC311E
Reference Numbers (Interchange):
Timken: UC311
SKF: UC311
FYH: UC311
AMI Bearings: UC311
TRITAN: UC311
SNR: UC311G2T04
Product Features
- Wide inner ring design provides effective shaft support for heavy-duty industrial applications.
- Spherical outer diameter compensates for shaft misalignment in mounted bearing housings.
- Set screw locking mechanism secures the bearing to the shaft, ideal for reversing load applications.
- Double RSR seals on both sides protect against contaminants and retain lubricant.
- Relubricatable via M12×1.5 lubrication hole with grease fitting for extended service life.
- Premium chrome steel construction with super-finished raceways and grade 10 balls for smooth, low-noise operation under heavy loads.
Installation Notes
- This insert bearing is designed for use in customer-supplied housings with corresponding spherical inside surfaces.
- Before installation, clean the shaft and housing bore thoroughly and inspect for damage or wear.
- Tighten set screws to the manufacturer’s specified torque – over-tightening can distort the bearing inner ring.
- Relubricate through the M12×1.5 grease fitting after installation to ensure proper lubrication.
- We recommend professional installation to verify fitment and ensure correct shaft alignment.
About DUHUI Bearing
Manufactured by DUHUI Bearing – an automotive bearing supplier established in Zhejiang, China, in 2003. DUHUI produces insert spherical bearings, wheel bearing kits, and hub assemblies to OE specifications. Contact us
