FAG UCF206-J7 30 mm 4-Bolt Square Flange Bearing Unit

FAG UCF206-J7 30 mm 4-Bolt Square Flange Bearing Unit

FAG UCF206-J7 is a complete 4-bolt square flange bearing unit for a 30 mm shaft. The unit combines a UC206 radial insert ball bearing with a square F206 cast-iron flange housing featuring four mounting holes. The housing measures 108x108 mm, with mounting-hole spacing J = 83 mm.

Exact product identification:

FAG + UCF206-J7 + UCF 206 J7 + UC206 + F206 + 30 mm bore + 108x108 mm housing + 4-bolt flange bearing unit

FAG UCF206-J7 – Technical Characteristics

What Is FAG UCF206-J7?

FAG UCF206-J7 is not simply a UC206 bearing.

It is a complete flanged housing unit consisting of:

UC206 radial insert ball bearing

combined with:

F206 square flange housing.

The cast-iron housing has four mounting holes, allowing the complete bearing unit to be bolted to a suitable machine surface.

This distinction is essential when identifying or ordering the product:

UC206 = insert bearing only

UCF206-J7 = complete flange bearing unit.

FAG UCF206-J7 Dimensions

The key mounting dimensions are:

d = 30 mm – bearing bore / nominal shaft diameter

108x108 mm – square housing dimensions

J = 83 mm – mounting-hole centre spacing

12 mm – mounting-hole diameter

40.2 mm – overall axial dimension of the unit

38.1 mm – width of the UC206 insert bearing

Number of mounting holes:

4

For a flange bearing unit, describing the product simply as 30x108x40.2 does not provide enough mounting information.

A more useful dimensional identification is:

30 mm bore + 108x108 mm housing + 83 mm bolt spacing + 4 x 12 mm mounting holes.

F206 Square Flange Housing

FAG UCF206-J7 uses a square F206 flange housing manufactured from cast iron.

The housing features four mounting points arranged around the bearing axis.

The 4-bolt square flange configuration is one of the principal identifying features of the UCF series.

Before replacing the unit, verify not only the shaft diameter but also:

housing dimensions

mounting-hole spacing

mounting-hole diameter

and:

number of mounting points.

UC206 Insert Bearing

The bearing insert used in FAG UCF206-J7 is:

UC206.

Its nominal bore diameter is:

30 mm.

UC206 is a radial insert ball bearing designed to operate in a compatible housing.

The spherical outside surface of the bearing insert operates against the corresponding spherical seat of the housing.

This bearing-to-housing geometry allows the assembled unit to compensate for limited static mounting misalignment.

This should not be confused with the internal self-aligning principle of a conventional double-row self-aligning ball bearing.

Shaft Location by Set Screws

The UC206 insert is secured to the shaft using set screws located in the extended inner ring.

Common English terms for this locking system include:

set screw locking

set screws

and:

grub screws.

The shaft-locking system should be checked when selecting an alternative bearing unit because products with similar external dimensions may use different shaft-location methods.

What Does UCF206 Mean?

UCF206 identifies a complete bearing unit from the UCF family.

For this product, the key components are:

UC206 – radial insert ball bearing

F206 – square flange housing

30 mm – nominal shaft diameter

4 mounting holes – square flange configuration.

This is why buyers may search for the same general configuration as:

UCF206

or:

UC206 + F206.

However, the standalone UC206 insert bearing must not be confused with the complete UCF206-J7 unit.

What Does J7 Mean in FAG UCF206-J7?

J7 is part of the exact FAG designation and identifies the specific bearing-to-housing fit/execution used for this unit.

It should not be interpreted as:

shaft diameter

C3 radial internal clearance

or:

bearing tolerance class.

When the exact FAG product is required, retain the complete reference:

FAG UCF206-J7.

Removing the suffix may broaden the search to other UCF206 executions and products from other manufacturers.

FAG UCF206-J7 vs FAG UC206

These references identify different products.

FAG UC206

is the insert bearing itself.

FAG UCF206-J7

is the complete assembly:

UC206 insert bearing + F206 flange housing.

If only the bearing insert requires replacement, the UC206 reference is relevant.

If the complete square 4-bolt housing assembly is required, the relevant product is UCF206-J7.

4-Bolt Square Flange Design

FAG UCF206-J7 has:

4 mounting holes.

Each mounting hole has a diameter of:

12 mm.

The mounting-hole centre spacing is:

J = 83 mm.

These dimensions are particularly important when replacing an existing flange bearing unit.

A 30 mm shaft diameter alone does not establish mounting compatibility.

Before ordering, verify:

30 mm shaft diameter

108x108 mm housing

83 mm mounting-hole spacing

and:

4 x 12 mm mounting holes.

Lubrication

The housing incorporates an:

M6 lubrication connection.

The relubrication provision allows lubricant to be replenished when required by the operating conditions.

Actual relubrication intervals and lubricant quantities should be determined according to operating speed, temperature, load, contamination and other application-specific conditions.

FAG UCF206-J7 Load Ratings

Basic dynamic load rating:

Cr = 19,500 N = 19.5 kN

Basic static load rating:

C0r = 11,300 N = 11.3 kN

Cr and C0r are standardized bearing parameters used for bearing selection and calculation.

They should not be interpreted simply as universal maximum permissible loads for the complete mounted unit regardless of housing installation, loading direction and operating conditions.

Selection and Interchangeability

When selecting a replacement for FAG UCF206-J7, verify:

exact reference – UCF206-J7

shaft diameter d = 30 mm

4-bolt square flange configuration

housing dimensions 108x108 mm

mounting-hole spacing J = 83 mm

mounting-hole diameter 12 mm

UC206 insert bearing

shaft-locking method

housing geometry

bearing load ratings

lubrication arrangement

and:

operating conditions.

The common 206 size designation or a 30 mm bore alone does not establish interchangeability.

How Is FAG UCF206-J7 Searched Online?

Buyers may search for this unit by its complete FAG designation, shortened UCF206 reference, insert-bearing number, housing designation, bore size, mounting configuration or English technical terminology.

Common search variants include:

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The exact product described on this page is:

FAG UCF206-J7 – complete 4-bolt square flange bearing unit for a 30 mm shaft, combining a UC206 radial insert ball bearing with an F206 cast-iron housing.

UCF 206 J7 FAG – Is It the Same as FAG UCF206-J7?

Yes. Search formats such as:

UCF 206 J7 FAG

FAG UCF 206 J7

UCF206 J7 FAG

UCF206-J7 FAG

and:

FAG UCF206-J7

refer to the same exact FAG reference when J7 is included.

For precise product identification, retain the catalogue designation:

FAG UCF206-J7.

Is UCF206 the Same as UCF206-J7?

UCF206 is a general size and construction reference used across the bearing industry.

UCF206-J7 is the specific FAG designation for this execution.

Therefore, when the exact FAG product is required, use the complete reference:

FAG UCF206-J7.

Does FAG UCF206-J7 Fit a 30 mm Shaft?

Yes. The nominal bore diameter of the UC206 insert is:

d = 30 mm.

However, when replacing the complete unit, the housing dimensions must also be checked:

108x108 mm housing

J = 83 mm mounting-hole spacing

4 x 12 mm mounting holes.

Is FAG UCF206-J7 a Pillow Block Bearing?

No. UCF206-J7 is a 4-bolt square flange bearing unit.

A pillow block uses a different housing geometry and mounting arrangement.

This distinction is important because users sometimes search broadly for a 30mm pillow block bearing when they actually require a square flange unit.

Technical Specification

FAQ

What is FAG UCF206-J7?

FAG UCF206-J7 is a complete 4-bolt square flange bearing unit combining a UC206 radial insert ball bearing with an F206 cast-iron housing.

What bore size does FAG UCF206-J7 have?

The bearing insert has a nominal 30 mm bore, making the unit suitable for a corresponding 30 mm shaft when all other installation requirements are met.

What are the mounting dimensions of UCF206-J7?

The square housing measures 108x108 mm, with 83 mm mounting-hole centre spacing and four 12 mm mounting holes.

Which bearing insert is used in FAG UCF206-J7?

The unit uses a UC206 radial insert ball bearing.

Is UC206 the same product as UCF206-J7?

No. UC206 is the bearing insert, while UCF206-J7 is the complete UC206 + F206 flange housing assembly.

What does J7 mean in UCF206-J7?

J7 is part of the exact FAG execution designation and relates to the bearing-to-housing fit. It is not the shaft diameter, C3 clearance or bearing tolerance class.

How many mounting holes does FAG UCF206-J7 have?

The unit has four mounting holes, characteristic of its square flange housing design.

Can any UCF206 replace FAG UCF206-J7?

Interchangeability should not be assumed from UCF206 alone. Verify the 30 mm bore, housing dimensions, 83 mm bolt spacing, mounting-hole diameter, insert construction, shaft-locking system, load ratings and housing geometry.

AI Overview

FAG UCF206-J7 is a complete 4-bolt square flange bearing unit for a 30 mm shaft, combining a UC206 radial insert ball bearing with an F206 cast-iron housing. The housing measures 108x108 mm, with 83 mm bolt spacing and four 12 mm mounting holes. Load ratings are Cr = 19.5 kN and C0r = 11.3 kN.