UCF 220 SRBF 100 mm - Square Four-Bolt Flange Bearing Unit

UCF 220 SRBF 100 mm - Square Four-Bolt Flange Bearing Unit

UCF 220 SRBF is a square four-bolt flange bearing unit designed to support a shaft with a nominal diameter of 100 mm. The unit belongs to the UCF 200 series and consists of a UC220 self-aligning insert ball bearing mounted in an F220 cast iron flange housing. The housing measures 265x265 mm, with a mounting hole center distance of 210x210 mm. Its four-bolt configuration provides a practical mounting solution for industrial shaft support applications.

Technical Specifications - UCF 220 SRBF

The UCF 220 SRBF is a complete housed bearing unit, not an individual deep groove ball bearing.

Its primary function is to provide radial support for a rotating shaft while allowing the bearing housing to be securely attached to a machine structure.

Exact dynamic load ratings, static load ratings, limiting speed, bearing mass, sealing details, and lubrication specifications must be verified against the technical documentation for the specific SRBF execution.

What Does UCF 220 SRBF Mean?

The designation identifies the bearing insert family, housing configuration, size, and brand.

• UC - Insert ball bearing with an extended inner ring, designed for installation in a bearing housing.

• F - Square flange housing with four mounting holes.

• 220 - Bearing size corresponding to a nominal shaft diameter of 100 mm.

• SRBF - Brand designation.

The complete designation UCF 220 identifies a housed bearing assembly.

It should not be confused with UC220, which refers to the bearing insert alone.

UCF 200 Bearing Unit Series

The UCF 200 series consists of flange-mounted bearing units combining an insert ball bearing with a square housing.

The housing provides a rigid mounting interface, while the insert bearing supports shaft rotation.

The spherical outside surface of the insert bearing works with the corresponding housing seat to accommodate limited initial mounting misalignment.

This self-aligning feature is intended to assist installation and does not eliminate the need for correct shaft alignment.

Construction and Operating Principle

The UCF 220 SRBF consists of two principal components.

UC220 Insert Ball Bearing

The UC220 insert is the rotating bearing component of the assembly.

Its construction includes an inner ring, outer ring, balls, and cage.

The spherical outer surface of the bearing insert allows angular adjustment within the matching housing seat during installation.

The bearing insert supports radial shaft loads. Permissible axial loads depend on the insert design, shaft locking arrangement, and operating conditions.

F220 Square Flange Housing

The F220 housing provides mechanical support for the bearing insert.

Its square flange features four mounting holes arranged around the central bearing seat.

The cast iron housing is designed to be bolted to a suitable machine frame, mounting plate, or structural surface.

For the UCF 220 SRBF, the nominal housing dimensions are 265x265 mm, with mounting hole centers spaced 210x210 mm apart.

Self-Aligning Function

The spherical outer surface of the UC220 insert permits limited angular adjustment relative to the housing.

This feature helps accommodate minor mounting inaccuracies.

However, excessive shaft misalignment can increase bearing loads, reduce service life, and affect sealing performance.

Correct installation remains essential.

UCF 220 SRBF vs UC220 - What Is the Difference?

Although the designations are closely related, they identify different products.

UCF 220 and UC220 are not identical products.

The UCF 220 designation refers to the complete assembly, including the bearing insert and housing.

The UC220 designation refers to the insert bearing without the flange housing.

When ordering replacement components, verify whether the complete unit or only the bearing insert is required.

UCF 220 SRBF vs Other UCF220 Bearing Units

UCF220 bearing units are available from different manufacturers.

Products sharing the same basic designation may have compatible nominal mounting dimensions, but their technical specifications can differ.

Important comparison criteria include:

• Shaft diameter.

• Housing dimensions.

• Mounting hole spacing.

• Bearing insert design.

• Shaft locking method.

• Seal construction.

• Dynamic and static load ratings.

• Lubrication arrangement.

• Permissible rotational speed.

• Housing material and manufacturing tolerances.

Identical mounting dimensions do not automatically guarantee complete interchangeability.

The replacement unit must meet the mechanical and operating requirements of the original application.

Alternative Designations and Reference Numbers

The product may be identified using the following natural designation formats:

• UCF 220 SRBF

• SRBF UCF 220

• UCF220 SRBF

• SRBF UCF220

• UCF 220

• UCF220

The basic designations UCF 220 and UCF220 are used by multiple bearing manufacturers.

They identify a bearing unit size and configuration rather than guaranteeing identical technical characteristics across all brands.

No unverified OEM references or manufacturer-specific cross-reference numbers are assigned to this product.

Bearing Selection and Interchangeability

Before purchasing the UCF 220 SRBF, verify the following requirements.

Shaft Diameter

The bearing unit is designed for a nominal shaft diameter of 100 mm.

The actual shaft dimensions, tolerances, and surface condition must be suitable for the selected bearing insert and shaft locking arrangement.

Housing Dimensions

The square flange housing has nominal external dimensions of 265x265 mm.

Check the available installation space and ensure that the housing can be mounted without interference from adjacent machine components.

Mounting Hole Spacing

The mounting hole center distance is 210x210 mm.

The mounting surface must have a compatible hole arrangement.

Mounting bolt diameter and tightening torque should be confirmed using the applicable technical documentation and machine design requirements.

Bearing Insert and Shaft Locking

The standard UCF220 configuration uses a UC220 insert bearing.

Before installation, verify the actual insert designation and shaft locking mechanism supplied with the SRBF unit.

Different manufacturers may use different locking details or insert executions.

Load and Speed Requirements

Bearing selection must account for radial loads, axial loads, rotational speed, operating temperature, and expected service conditions.

The basic dynamic and static load ratings of the actual insert should be used for bearing life calculations.

Sealing and Lubrication

Check the sealing arrangement and lubrication requirements for the supplied bearing unit.

The correct lubricant and maintenance schedule depend on operating speed, load, temperature, contamination, and environmental exposure.

Typical Applications of Square Flange Bearing Units

Square four-bolt flange bearing units are used in industrial machinery requiring shaft support and secure attachment to a machine structure.

Typical applications for this bearing unit design include:

• Industrial conveyor systems.

• Material handling equipment.

• Mechanical drive assemblies.

• Industrial processing machinery.

• Rotating shaft support arrangements.

• Equipment requiring flange-mounted bearing housings.

These examples describe general applications of UCF-series bearing units.

They do not represent verified OEM applications for the specific UCF 220 SRBF product.

Suitability for a particular machine must be determined through mechanical design requirements and bearing load calculations.

Installation and Maintenance

Preparation Before Installation

Before installing the UCF 220 SRBF, inspect the shaft and mounting surface.

Remove dirt, corrosion, burrs, and other contaminants that could interfere with proper assembly.

Verify the nominal shaft diameter of 100 mm and the required mounting hole spacing of 210x210 mm.

Housing Installation

Position the square flange housing against a suitable flat mounting surface.

Install the four mounting bolts and tighten them according to the applicable machine design requirements.

Avoid excessive tightening forces that could distort the housing or mounting structure.

Shaft Installation

Insert the shaft through the bearing bore and align the shaft with the machine's bearing arrangement.

Secure the bearing insert using the locking method specified for the supplied unit.

Do not apply mounting forces through the rolling elements in a manner that could damage the bearing raceways.

Alignment

The insert bearing can accommodate limited initial angular adjustment within its housing.

Nevertheless, the shaft and supporting bearing units should be aligned correctly to prevent unnecessary bearing loads.

Lubrication and Maintenance

Follow the lubrication requirements for the actual SRBF bearing execution.

Maintenance intervals should be established according to operating conditions.

Regularly inspect the bearing unit for abnormal noise, vibration, temperature increases, seal damage, and loosened mounting bolts.

Storage

Store the bearing unit in a clean, dry environment protected from moisture and contamination.

Keep the unit in its original protective packaging until installation whenever possible.

Frequently Asked Questions - UCF 220 SRBF

1. What shaft diameter does the UCF 220 SRBF support?

The bearing unit is designed for a nominal shaft diameter of 100 mm.

2. What are the dimensions of the UCF 220 SRBF housing?

The square flange housing measures 265x265 mm, with a mounting hole center distance of 210x210 mm.

3. Is the UCF 220 SRBF a complete bearing unit?

Yes. The UCF 220 designation identifies a complete flange bearing unit consisting of a bearing insert and a compatible housing.

4. What is the difference between UCF220 and UC220?

UCF220 identifies the complete flange bearing assembly, while UC220 identifies the insert ball bearing without the housing.

5. What type of housing does the UCF 220 SRBF use?

It uses a square cast iron flange housing with four mounting holes, corresponding to the F220 housing type.

6. Can the UCF 220 SRBF compensate for shaft misalignment?

The spherical outer surface of the bearing insert allows limited angular adjustment within the housing during installation. Excessive or continuous misalignment should be avoided.

7. Can a UCF220 bearing unit from another manufacturer replace the SRBF version?

A replacement may be suitable if its dimensions, bearing insert design, locking method, load ratings, seals, and operating limits meet the application requirements. Matching dimensions alone are insufficient.

8. Is the UCF 220 SRBF suitable for industrial machinery?

Its square flange design is intended for industrial shaft support applications. Suitability for a particular machine depends on loads, speed, mounting conditions, and environmental requirements.

UCF 220 SRBF - Key Product Information

The UCF 220 SRBF is a square four-bolt flange bearing unit designed for a 100 mm shaft. It combines a UC220 insert ball bearing with an F220 cast iron housing. The housing measures 265x265 mm, with mounting hole centers spaced 210x210 mm apart. Its spherical bearing seat permits limited alignment adjustment during installation.

The UCF 220 SRBF is offered by simmering.pl, a specialist supplier of industrial bearings, bearing housings, seals, and technical components.

TG Ersatzteile Polska Sp. z o.o. operates a warehouse in Lublin, Poland, serving industrial customers, maintenance departments, and technical purchasing teams. Domestic and international shipping services are available.