The UCF205 square flanged bearing unit is one of the most commonly used mounted bearings in industrial and mechanical applications. Known for its sturdy design, ease of installation, and versatility across industries, the UCF205 bearing unit continues to be a preferred choice for engineers, plant managers, and maintenance teams worldwide. In this article, BYWB Bearing explores the specifications, applications, differences from other units, and sizing information of the UCF205 to help you better understand and choose the right bearing for your needs.
What is “UCF” in Bearing?
The term “UCF” refers to a specific type of bearing housing configuration:
U = Stands for “Insert Bearing.”
C = Indicates that the insert is equipped with set screw locking.
F = Refers to the square 4-bolt flange housing.
UCF bearings are composed of two main parts:
UC insert bearing: A self-aligning deep groove ball bearing with seals on both sides and set screws for shaft locking.
F-type flange housing: A square-shaped cast iron housing with four bolt holes for stable mounting.
This combination provides high rigidity and alignment compensation, making UCF units ideal for moderately heavy-duty applications.
UCF205 Specification
The UCF205 is a part of the 200 bearing series and fits a 25mm shaft diameter. It includes the UC205 insert bearing mounted in a flanged cast iron housing. Here are its key specifications:
| Parameter | Value |
| Bearing Number | UCF205 |
| Bore Diameter (d) | 25 mm |
| Housing Type | 4-bolt square flange |
| Housing Material | Cast Iron |
| Insert Bearing | UC205 |
| Set Screw Size | M6 |
| Bolt Hole Center Distance (J) | 95 mm |
| Overall Width (L) | 95 mm |
| Overall Height (A) | 34 mm |
| Bolt Hole Diameter (N) | 11 mm |
| Grease Fitting | Included |
| Sealing Type | Rubber seals on both sides |
| Pre-lubricated | Yes |
The UC205 insert is pre-lubricated and sealed, which means the unit can be installed and operated without the need for immediate lubrication maintenance. The cast iron housing is powder-coated or painted to resist corrosion.
What is the Difference Between UCF and UCP Bearings?
Both UCF and UCP belong to the category of mounted bearing units, but they differ in housing design and application.
| Feature | UCF Bearing | UCP Bearing |
| Shape | Square 4-bolt flange | Pillow block with 2-bolt base |
| Mounting Style | Mounted on vertical/wall surfaces | Mounted on flat/horizontal surfaces |
| Common Locations | Side walls, ceilings, vertical setups | Machine bases, conveyor frames |
| Model Example | UCF205 | UCP205 |
UCF Bearings are better suited for mounting on vertical or irregular surfaces due to their flanged design and four-point mounting system, which provides strong and even support.
UCP Bearings, in contrast, are easier to install on flat bases and are ideal for horizontal shaft support.
Both use the same insert bearings (like UC205), making them interchangeable in terms of load capacity, but not in mounting compatibility.
What is UCF205 Bearing Housing Used For?
The UCF205 is widely used in various mechanical systems due to its simple design, reliability, and easy maintenance. Common applications include:
1. Agricultural Equipment
Combine harvesters, seeders, and rotary tillers frequently use UCF205 units for their robustness and ease of field replacement.
2. Conveyor Systems
UCF205 can be mounted on frames to support rollers or pulley shafts in conveyor belts, particularly in food processing and packaging lines.
3. Textile Machinery
The smooth operation and vibration-damping qualities of the UCF205 make it ideal for looms and spinning equipment.
4. HVAC Systems
Fan shafts and motor mountings in air handling systems benefit from UCF units due to their compact design.
5. Industrial Automation
Robotic arms, gantries, and belt drives often use UCF205 units in mounting shafts and rollers.
The flanged design allows the bearing to be securely fixed and aligned on various surfaces, which is why it is so popular in industrial settings.
UCF Bearing Housing Size Chart
Below is a comprehensive UCF bearing housing size chart ranging from UCF204 to UCF220:
| Bearing No. | Shaft Dia (mm) | Bolt Hole Dist. J (mm) | Housing Width L (mm) | Housing Height A (mm) | Bolt Hole Ø N (mm) |
| UCF204 | 20 | 86 | 86 | 31 | 10.5 |
| UCF205 | 25 | 95 | 95 | 34 | 11 |
| UCF206 | 30 | 105 | 105 | 38 | 12 |
| UCF207 | 35 | 115 | 115 | 42 | 14 |
| UCF208 | 40 | 130 | 130 | 45 | 16 |
| UCF209 | 45 | 137 | 137 | 48 | 18 |
| UCF210 | 50 | 143 | 143 | 51 | 19 |
| UCF211 | 55 | 151 | 151 | 55 | 19 |
| UCF212 | 60 | 162 | 162 | 59 | 22 |
| UCF213 | 65 | 175 | 175 | 62 | 22 |
| UCF214 | 70 | 184 | 184 | 66 | 23 |
| UCF215 | 75 | 195 | 195 | 70 | 24 |
| UCF216 | 80 | 203 | 203 | 74 | 26 |
| UCF217 | 85 | 215 | 215 | 78 | 27 |
| UCF218 | 90 | 226 | 226 | 82 | 28 |
| UCF219 | 95 | 240 | 240 | 86 | 30 |
| UCF220 | 100 | 254 | 254 | 90 | 32 |
This chart allows users to select the proper size bearing housing for various shaft diameters and installation requirements.
Installation Tips for UCF205
Ensure the mounting surface is clean and flat.
Align the bolt holes precisely to avoid stress.
Insert the shaft and tighten set screws evenly.
Re-lubricate periodically if used in harsh environments.
BYWB Bearing offers additional technical support and installation guides upon request.
Why Choose BYWB Bearing for UCF205?
At BYWB Bearing, we pride ourselves on delivering high-performance bearing units manufactured with strict quality control processes. Here’s why our UCF205 stands out:
ISO-certified production
Strict material inspection (cast iron, bearing steel)
High-precision machining and noise testing
Custom branding and OEM packaging available
Bulk stock ready for fast dispatch
Competitive pricing with global shipping
Whether you’re an OEM, distributor, or end-user, BYWB Bearing ensures that our UCF205 units meet your operational and commercial expectations.
Conclusion
The UCF205 square flanged bearing unit is an essential component for a wide range of mechanical systems, from farming to industrial automation. Its sturdy 4-bolt mounting, integrated UC205 insert bearing, and adaptability make it an excellent choice for mounting 25mm shafts.
Understanding the difference between UCF and UCP bearings, along with size selection and installation best practices, ensures optimal performance and long service life.
Looking for reliable UCF205 bearing units?
Choose BYWB Bearing as your trusted supplier. Contact us at www.bywbbearing.com for product catalogs, quotes, and technical support.
