UCF Series

Name: UCF Series 4 Bolt Square Flange Mounted Bearing Units
Brand: YJZY
Availability: InStock

UCF series square flange pillow block bearing combines UC insert bearing and 4‑bolt square housing. Self‑aligning design compensates minor shaft misalignment. Set screw locking, double lip seals and pre‑filled grease ensure reliable performance. Easy mounting for conveyors agricultural textile and general industrial machinery. Full UCF200 UCF300 sizes available, factory direct supply.

Classification :

Pillow Block Bearings

Keywords :

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YJZY Factory Direct UCF Flange Bearing Units

UCF and UCFU four bolt square flange mounted bearings, covering UCF200 light series and UCF300 heavy duty series. Cast iron housing with set screw locking. Flat base and spigot types optional, fully interchangeable for automation conveyor and heavy industrial machinery bulk procurement.

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Core Advantages For Bulk Buyers

UCF200 light duty & UCF300 heavy duty two series available
4 bolt square flange design for stable installation
Set screw locking, simple and reliable shaft fixing
Double lip 2RS seal for dust and splash resistance
ISO standard dimension interchangeable with mainstream brands
GCr15 bearing insert, stable performance for continuous operation
Support mixed container order, neutral packing and OEM marking

Typical Applications

Automation production lines & transmission equipment
Conveyor systems and packaging machinery
Agricultural machinery and food processing equipment
Heavy machinery, mining auxiliary and material handling
Small fans, pumps and general industrial devices

UCF VS UCFU Housing Difference

Model Type	Housing Feature	Installation Characteristic	Recommended Scenario
UCF Square Flange	Flat base without spigot	Direct mounting on flat surface, flexible	General conveyor, agricultural machinery
UCFU Square Flange	Back with positioning spigot	Embedded positioning, higher coaxiality	Automation equipment, precision machines

UCF200 VS UCF300 Series Difference

Series	Load Grade	Structure Feature	Customer Use Case
UCF200 / UCFU200	Light to medium load	Compact size, low weight	Conveyor, packaging, small automation
UCF300 / UCFU300	Heavy duty load	Thickened housing, larger bearing insert	Heavy machinery, mining, high load transmission

Español: Unidades de rodamiento de brida cuadrada serie UCF, incluye serie ligera UCF200 y serie pesada UCF300, carcasa de hierro fundido, tipo base plana y con espiga, disponibles en stock para distribuidores industriales.

Popular Stock Model Dimension Table (Unit:mm)

Below are commonly stocked UCF200 and UCF300 models. Click the button to view & copy the full dimension list including all metric variants.

Model	Bore	Overall Size	Mount Hole Spacing	Series
UCF204	20	86	64	UCF200
UCF205	25	95	70	UCF200
UCF206	30	108	80	UCF200
UCF207	35	117	90	UCF200
UCF305	25	130	100	UCF300
UCF306	30	145	112	UCF300
UCF307	35	160	125	UCF300
UCFU204	20	86	64	UCF200
UCFU305	25	130	100	UCF300

📄 Full Complete Dimensions (All UCF200 UCF300 & UCFU Metric Models)

Model	Bore	Outer	Flange Size	Mount Pitch	Thickness	Series
UCF204	20	47	86	64	18	UCF200
UCF205	25	52	95	70	19	UCF200
UCF206	30	62	108	80	21	UCF200
UCF207	35	72	117	90	24	UCF200
UCF208	40	80	130	100	26	UCF200
UCF209	45	85	140	108	28	UCF200
UCF210	50	90	150	115	30	UCF200
UCF305	25	62	130	100	28	UCF300
UCF306	30	72	145	112	30	UCF300
UCF307	35	80	160	125	32	UCF300
UCF308	40	90	170	132	34	UCF300
UCF309	45	100	180	140	36	UCF300
UCF310	50	110	190	150	38	UCF300
UCFU204	20	47	86	64	22	UCF200
UCFU205	25	52	95	70	23	UCF200
UCFU206	30	62	108	80	25	UCF200
UCFU305	25	62	130	100	32	UCF300
UCFU306	30	72	145	112	34	UCF300

*Inch size data available upon request, contact us for technical sheet and bulk quotation.

Buyer Frequently Asked Questions

UCF is flat square flange without positioning spigot for general installation. UCFU has a spigot on housing back for embedded positioning and higher installation coaxiality.

UCF200 is light medium load compact type. UCF300 is heavy duty version with thickened cast iron housing and larger bearing insert for high load working conditions.

Yes, all dimensions follow ISO standard, directly replace mainstream brand units without equipment modification.

Standard stocked UCF200 and partial UCF300 models can be shipped within 7-10 working days. Full heavy duty UCF300 bulk orders take 20-25 working days.

Yes, we support laser marking customer logo on housing and insert, neutral export packaging and mixed container shipment for global distributors.

Yes, we can customize triple seal, stainless steel insert and anti-corrosion housing for harsh working environments.

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Large inventory, flexible MOQ and custom packaging for global bearing distributors.

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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