UCFU Series

UCFU series are heavy-duty square flange bearings with wide inner ring and set screw locking. They offer stronger locking force, better anti-vibration performance and higher stability, ideal for heavy-load industrial equipment.

Classification :

Pillow Block Bearings

Keywords :

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UCFU Series Four-Bolt Square Flange Mount Bearing Units

🎯 Compact & Rigid Flange Design

UCFU series is a type of four-bolt square flange mount bearing unit, consisting of a spherical outer ring insert bearing and a robust cast iron square housing. The square flange with four fixing bolts ensures stable and secure installation, making it ideal for mounting on equipment side plates or bases with limited space. Its compact structure saves installation space while maintaining high rigidity, suitable for both light and medium-duty mechanical transmission systems.

⚙️ Reliable Performance & Easy Maintenance

Featuring a spherical outer diameter insert bearing, the UCFU series offers excellent self-aligning capability to compensate for shaft misalignment and installation errors, ensuring smooth operation. Equipped with set screw locking for reliable shaft fixation and a grease fitting for convenient relubrication, it supports easy maintenance and long service life. Constructed from high-quality bearing steel and durable cast iron housing, it delivers strong radial load capacity and moderate axial load resistance, performing well in dusty or harsh working environments.

🛠️ Extensive Application Scenarios

Widely used in conveyor systems, agricultural machinery, food processing equipment, fans, pumps, packaging machines, textile equipment, and various light industrial machinery. Particularly suitable for scenarios requiring compact installation, stable fixation, and easy replacement of bearing inserts.

📊 Common Models & Key Sizes (Reference)

Bearing Number	d	D	B
Bearing Number	(mm)	(mm)	(mm)
UCFU203	17	27.4	78
UCFU204	20	31	88
UCFU205	25	34.1	97
UCFU206	30	38.1	110
UCFU207	35	42.9	119
UCFU208	40	49.2	132
UCFU209	45	49.2	139
UCFU210	50	51.6	145
UCFU211	55	55.6	164
UCFU212	60	65.1	177
UCFU213	65	65.1	189
UCFU214	70	74.6	195
UCFU215	75	77.8	202
UCFU216	80	82.6	213
UCFU217	85	85.7	222
UCFU218	90	96	240
UCFU220	100	108	270
UCFU305	25	38	110
UCFU306	30	43	125
UCFU307	35	48	135

Mounted bearings & pillow block bearings - UCP, UCF, UC series with housing, ready-to-use units for industrial machinery

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

Pillow Block Bearings