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When a seized or dry bearing brings your conveyor line, agricultural equipment, or industrial shaft assembly to a halt, downtime costs money. UC metric self-lube bearing inserts are engineered for engineers, maintenance technicians, and serious DIY builders who need a drop-in replacement or new-build solution that keeps running with minimal intervention.
Each UC insert bearing consists of a spherical outer ring and an inner ring with a set-screw locking collar, manufactured from cast iron housing with a chrome steel (GCr15) inner ring. Available in models UC203 through UC220, covering shaft diameters from 17 mm (0.67 in) to 95 mm (3.74 in). The self-lubricating grease reservoir within the sealed housing extends re-lubrication intervals significantly.
Typical use cases include conveyor roller shaft mounting, agricultural PTO and auger shaft support, and light-to-medium industrial gearbox pillow-block replacement — all scenarios where a UC metric self-lube bearing insert delivers consistent radial load capacity with misalignment tolerance.
Integrated grease reservoir reduces maintenance frequency and extends service life in hard-to-reach shaft locations.
17 models from UC203 (17 mm) to UC220 (95 mm) cover the most common metric shaft diameters in a single product line.
Dual set-screw inner ring locks securely onto the shaft, preventing axial creep under dynamic radial loads.
Allows up to ±2° angular misalignment, compensating for minor shaft deflection or housing misalignment during installation.
Robust material pairing delivers solid radial load capacity suitable for conveyors, fans, and agricultural machinery.
RS-type seals on both sides keep grease in and contaminants — dust, moisture, and debris — out for cleaner operation.
| Bearing Series | UC (Insert Bearing) |
|---|---|
| Models Available | UC203 · UC204 · UC205 · UC206 · UC207 · UC208 · UC209 · UC210 · UC211 · UC212 · UC213 · UC214 · UC215 · UC216 · UC217 · UC218 · UC220 |
| Shaft Diameter Range | 17 mm – 95 mm (0.67 in – 3.74 in) |
| Inner Ring Material | Chrome Steel (GCr15) |
| Housing Material | Cast Iron |
| Seal Type | Double-Lip Rubber Seal (RS) |
| Locking Method | Set-Screw (dual) |
| Misalignment Tolerance | ±2° |
| Lubrication | Pre-greased / Self-lubricating |
| Outer Ring Shape | Spherical |
| Load Type | Radial |
| Housing Compatibility | UCP / UCFL / UCFC / UCT series |
| Weight | See variant options |
| Quantity per Order | 1 pc (per variant) |
Match the model number to your shaft diameter: UC203 = 17 mm, UC204 = 20 mm, UC205 = 25 mm, UC206 = 30 mm, UC207 = 35 mm, UC208 = 40 mm, UC209 = 45 mm, UC210 = 50 mm, UC211 = 55 mm, UC212 = 60 mm, UC213 = 65 mm, UC214 = 70 mm, UC215 = 75 mm, UC216 = 80 mm, UC217 = 85 mm, UC218 = 90 mm, UC220 = 95 mm. Select the model that matches your shaft's outer diameter exactly.
Yes — UC insert bearings are designed to fit standard UC-series housings including UCP (pillow block), UCFL (flange), UCFC (cartridge), and UCT (take-up) types. Confirm the housing bore matches the outer diameter of the selected UC model before ordering.
The double-lip rubber seals (RS type) provide good protection against moisture and dust ingress, making them suitable for light outdoor and agricultural applications. For heavily corrosive or submerged environments, consider stainless steel variants or additional external sealing.
No — each bearing insert comes pre-greased from the factory. The self-lubricating design extends re-greasing intervals. For high-speed or high-temperature applications, verify the grease specification matches your operating conditions and re-grease via the housing grease fitting as needed.
Dynamic radial load capacity varies by model size. As a general guide, smaller models (UC203–UC205) handle approximately 6–11 kN dynamic load, while larger models (UC215–UC220) can handle 30–50 kN. For precise load ratings, refer to the model-specific datasheet or contact us to confirm.
Standard UC insert bearings use set-screw locking and are designed for smooth shafts. If your shaft has a keyway, the set screw can be positioned over the keyway for additional retention, but ensure the shaft tolerance is within h6–j6 for a proper fit. For keyed-shaft-specific designs, look for UK-series bearings.
UC203 is designed for a 17 mm shaft while UC204 is for a 20 mm shaft — they are not interchangeable. Each model number corresponds to a specific bore diameter. Always select the model that exactly matches your shaft diameter to ensure proper fit and load transfer.
