UFL004 ASAHI 20 mm Two-Bolt Flange Bearing Unit

Overview

The UFL004 ASAHI 20 mm is a compact two-bolt flange bearing unit from the ASAHI Silver Series, designed for shaft support in industrial machinery and equipment.

The unit is designed for a 20 mm shaft diameter. Its compact two-bolt flange housing allows easy mounting to machine frames, side plates and structural panels.

The bearing insert is secured to the shaft by an eccentric locking collar, providing reliable shaft fixation in conveyor, fan, agricultural and general industrial applications.

Industrial Applications

The UFL004 ASAHI is suitable for:

• Conveyor systems
• Material handling equipment
• Packaging machinery
• Agricultural machinery
• Production equipment
• Light-duty drives
• Conveyor rollers
• Industrial fans
• Food processing machinery
• General industrial assemblies

ASAHI Silver Series

The UFL004 belongs to the compact ASAHI Silver Series.

The UFL design uses a two-bolt flange housing with reduced overall dimensions, making it particularly suitable where installation space is limited.

Its two mounting holes allow simple and secure installation without the need for a larger conventional flange housing.

Two-Bolt Flange Housing

The UFL004 uses a compact elongated housing with two mounting holes.

Key mounting dimensions include:

Overall Length a: 90 mm

Bolt Hole Spacing e: 71 mm

Housing Width b: 55 mm

Dimension i: 8 mm

Dimension g: 8 mm

Dimension l: 16 mm

Mounting Hole Diameter s: 10 mm

Recommended Mounting Bolts: M8

These compact dimensions make the unit suitable for machines with limited mounting space.

Eccentric Locking Collar

The UFL004 uses an eccentric locking collar to secure the bearing insert to the shaft.

The collar works with the eccentric extension of the bearing inner ring. After positioning on the shaft, the collar is rotated in the direction of shaft rotation and secured.

This locking method is widely used in conveyor systems, fans, agricultural equipment and light industrial machinery.

Self-Aligning Bearing Insert

The bearing insert operates within a spherical seat inside the housing.

The spherical outer surface of the insert allows compensation for minor initial shaft-to-housing misalignment.

This feature is intended to correct small mounting inaccuracies and should not be considered a solution for significant shaft deflection or severe misalignment.

Technical Specification

Manufacturer: ASAHI

Designation: UFL004

Series: Silver Series UFL000

Product Type: Flange bearing unit

Housing Type: Two-bolt flange

Shaft Diameter d: 20 mm

Overall Length a: 90 mm

Bolt Hole Spacing e: 71 mm

Housing Width b: 55 mm

Dimension i: 8 mm

Dimension g: 8 mm

Dimension l: 16 mm

Mounting Hole Diameter s: 10 mm

Dimension Z: 26.5 mm

Dimension L: 24.5 mm

Dimension n: 6 mm

Dimension C1: 3 mm

Dimension Zs: 31 mm

Recommended Mounting Bolt: M8

Shaft Locking Method: Eccentric locking collar

Number of Mounting Holes: 2

Measurement System: Metric

UFL004 ASAHI Designation Explained

UFL - compact two-bolt flange bearing unit from the ASAHI Silver Series

004 - size corresponding to a 20 mm shaft diameter

ASAHI - manufacturer

The complete designation is important when selecting a replacement because other 20 mm flange bearing units can have different housing dimensions, bolt spacing and shaft locking methods.

Mounting Dimensions

One of the most important parameters when replacing a flange bearing unit is the mounting hole spacing.

For the ASAHI UFL004, the bolt center distance is:

71 mm

The overall housing length is 90 mm, while the mounting holes are designed for M8 bolts.

These dimensions should be checked carefully when selecting a direct replacement for an existing machine.

Shaft Locking

The eccentric collar provides secure shaft fixation without the need for two set screws in the inner ring.

This design is especially useful in applications with predominantly one-direction shaft rotation.

Correct installation of the collar is important for reliable bearing retention and service life.

Operational Advantages

• 20 mm shaft diameter.
• Compact two-bolt flange housing.
• 71 mm mounting hole spacing.
• Eccentric locking collar.
• Self-aligning bearing insert.
• Easy installation in industrial machinery.

Replacement and Bearing Unit Selection

When replacing an UFL004 ASAHI, verify:

• 20 mm shaft diameter
• 90 mm overall housing length
• 71 mm bolt hole spacing
• 55 mm housing width
• 10 mm mounting holes
• M8 mounting bolts
• Eccentric collar locking system
• Available installation space

A bearing unit should not be selected only by shaft diameter because different 20 mm flange units can have significantly different housing and mounting dimensions.

AI OVERVIEW

The UFL004 ASAHI 20 mm is a compact two-bolt flange bearing unit from the ASAHI Silver Series. It features a 20 mm bore, 90 mm overall length, 71 mm mounting hole spacing and an eccentric locking collar. The unit is suitable for conveyors, packaging machinery, agricultural equipment and compact industrial shaft-support applications.

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FAQ

What is the UFL004 ASAHI?

It is a compact two-bolt flange bearing unit from the ASAHI Silver Series.

What shaft diameter does UFL004 fit?

The unit is designed for a 20 mm shaft.

What is the bolt hole spacing of UFL004 ASAHI?

The mounting hole center distance is 71 mm.

What is the overall length of UFL004?

The overall housing length is 90 mm.

What is the housing width?

The b dimension is 55 mm.

What mounting bolts are recommended?

ASAHI specifies M8 mounting bolts.

How is the bearing secured to the shaft?

The bearing insert is locked to the shaft using an eccentric locking collar.

Is UFL004 a two-bolt flange unit?

Yes. The housing has two mounting holes.

Can the bearing compensate for misalignment?

The self-aligning insert can compensate for small initial alignment errors between the shaft and housing.

Is UFL004 suitable for conveyors?

Yes. Compact flange bearing units of this type are commonly used in conveyors, rollers and material handling equipment.

Can UFL004 be used in agricultural machinery?

Yes, provided the load, speed, environment and mounting dimensions meet the application requirements.

Can any 20 mm flange bearing replace UFL004?

No. Bolt spacing, housing dimensions and shaft locking method must also be checked.

Is UCFL204 the same as UFL004?

No. Both may fit a 20 mm shaft, but they belong to different bearing unit series and have different housing designs and mounting dimensions.

What is the mounting hole diameter?

The s dimension is 10 mm.

Does UFL004 use set screws for shaft locking?

No. The UFL Silver Series uses an eccentric locking collar.

What is the correct parent category?

The product belongs to Two-Bolt Flange Bearing Units.

Where is UFL004 commonly used?

Typical applications include conveyors, packaging machines, rollers, light-duty drives, production machinery and agricultural equipment.

What does 004 mean?

Within the UFL000 series, size 004 corresponds to a 20 mm shaft diameter.

Who manufactures UFL004?

The bearing unit is manufactured by ASAHI.

What should be checked before ordering UFL004?

The most important parameters are the 20 mm shaft diameter, 71 mm mounting hole spacing, 90 mm overall length and eccentric collar locking method.