UCFC Series
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UCFC Series Round Four Bolt Flange Bearing Units
YJZY Factory UCFC Round Four‑Bolt Flange Bearing Units
UCFC series round four‑bolt flange mounted bearing unit consists of FC round cast iron housing and UC insert bearing with set‑screw locking. Different from square UCF and oval UCFL housing, it allows minor shaft misalignment. Full stock for UCFC204‑UCFC210, complete metric range UCFC201‑UCFC218 available, ISO standard dimensions for direct replacement, support bulk wholesale and mixed container shipment.
Core Advantages For Bulk Buyers
- Round four‑bolt FC cast iron housing, high strength shock‑resistant
- GCr15 chrome steel UC insert bearing, multiple seal options 2RS ZZ
- Set‑screw locking structure on extended inner ring for fast installation
- Permit slight shaft misalignment to compensate assembly error
- Optional C3 large clearance for vibrating agricultural and conveyor equipment
- Support OEM laser marking and neutral export carton packing
- Adequate stock, flexible MOQ for global distributors and machinery factories
Typical Applications
- Agricultural machinery and farm processing equipment
- Conveyor rollers and transmission machinery
- Fans, blowers and general industrial equipment
- Packaging machines and light‑medium duty transmission assemblies
- Material‑handling outdoor working equipment with dust and moisture
UCFC VS UCF VS UCFL Housing Difference
| Model Series | Housing Type | Mounting Holes | Feature |
|---|---|---|---|
| UCFC | Round flange housing FC | 4 bolt holes | Round outline, uniform stress distribution |
| UCF | Square flange housing F | 4 bolt holes | Square outline, widely used standard flange unit |
| UCFL | Oval flange housing FL | 2 bolt holes | Narrow installation space, limited mounting position |
Hot Stock Model Dimension Table (Unit:mm)
Below are hot selling stocked UCFC models. Click the button below to view & copy the complete full‑size list UCFC201‑UCFC218.
| Model | Bore d | Insert D | Housing L | Housing J | Bolt Hole N |
|---|---|---|---|---|---|
| UCFC204 | 20 | 47 | 86 | 70 | 10 |
| UCFC205 | 25 | 52 | 95 | 75 | 10 |
| UCFC206 | 30 | 62 | 115 | 92 | 12 |
| UCFC207 | 35 | 72 | 130 | 102 | 12 |
| UCFC208 | 40 | 80 | 140 | 112 | 14 |
| UCFC209 | 45 | 85 | 150 | 122 | 14 |
| UCFC210 | 50 | 90 | 160 | 130 | 14 |
Buyer Frequently Asked Questions
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Large inventory, flexible MOQ and custom packaging for global bearing distributors and machinery manufacturers.

Pillow Block Bearings, also known as housed bearing units, are pre-assembled units combining high-precision insert ball bearings with robust cast iron or stainless steel housings. Designed for easy installation, reliable operation and low maintenance, these units feature excellent self-aligning performance, effective sealing against dust and moisture, and strong load capacity, making them ideal for a wide range of industrial applications.
Core Advantages
- Easy & Fast Installation: Pre-assembled units eliminate the need for separate bearing and housing installation, reducing on-site assembly time.
- Self-Aligning Performance: Spherical outer diameter of insert bearings automatically compensates for shaft misalignment and mounting errors, ensuring smooth operation.
- Superior Sealing: Multi-labyrinth seals effectively block dust, dirt and moisture, extending service life in harsh working environments.
- Wide Compatibility: Available in various housing styles (pillow block, flange, take-up) and shaft sizes, suitable for metric and inch shafts.
- Low Maintenance: Equipped with grease fittings for convenient relubrication, supporting long-term continuous operation.
Typical Industrial Applications
Widely used in conveyor systems, agricultural machinery, food processing equipment, fans, pumps, packaging machines, textile equipment, mining machinery, and general industrial transmission systems.
We offer a full range of pillow block and mounted bearing units to meet diverse industrial installation and load requirements:
| Series | Housing Type | Key Features |
|---|---|---|
| UCP Series | Standard Pillow Block (2-bolt) | Most widely used, easy installation, suitable for general industrial machinery, conveyors, fans and pumps |
| UCT Series | Take-Up Unit (Slotted) | Adjustable housing for belt tensioning, ideal for belt conveyors, textile machinery and packaging lines |
| UCF Series | Square Flange (4-bolt) | Rigid square flange for side/end mounting, perfect for food processing equipment and automation lines |
| UCFC Series | Round Flange (4-bolt) | Compact round flange, space-saving, suitable for pumps, fans and light to medium-duty equipment |
| UCFL Series | Diamond Flange (2-bolt) | Narrow rhombic flange, ideal for limited installation space, small conveyors and agricultural machinery |
| UCFU Series | Square Flange with Boss | High-precision positioning with raised boss, suitable for precision transmission and automated production lines |
| NAP Series | Narrow Pillow Block | Slim vertical housing, space-saving, for light-duty conveyors and small mechanical equipment |
PRODUCT TESTING
Bearing Forging
Bearing Annealing
Turning Process
Quenching
Bearing Assembly
Bearing Clearance Testing
Grease injection
Bearing Marking
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