MTM UCFB 206 30 mm 3-Bolt Flange Bearing Unit

MTM UCFB 206 30 mm 3-Bolt Flange Bearing Unit

MTM UCFB 206 is a 3-bolt flange bearing unit with a nominal shaft bore of 30 mm. The UCFB206 configuration consists of a UC206 bearing insert installed in an FB206 flange housing. Its key construction features are the three-point housing mounting arrangement and the UC-type insert with an extended inner ring secured directly to the shaft using set screws.

MTM UCFB 206 - Technical Characteristics

Key identification data:

Brand: MTM

Designation: UCFB 206

Bearing unit type: 3-bolt flange bearing unit

Bore diameter d: 30 mm

Bearing insert: UC206

Housing type: FB206

Housing mounting: 3-bolt / 3 mounting points

Shaft locking: Set screws

The key technical identification is therefore:

MTM + UCFB 206 + 30 mm bore + UC206 + FB206

The complete UCFB designation is important because the UC206 insert can also be used in other housing configurations.

UCFB 206 Dimensions

The nominal bore diameter is:

d = 30 mm

This determines the nominal shaft size for the metric UCFB206 unit.

Industry catalogues for UCFB206 units provide additional dimensions for the FB206 housing, but small dimensional differences exist between manufacturers.

For this reason, detailed housing dimensions from another brand should not automatically be assigned to MTM UCFB 206.

When housing dimensions are critical for replacement or machine design, verify the exact MTM drawing, particularly:

overall housing dimensions

mounting-hole spacing

mounting-hole diameter

shaft centre height and position

housing thickness

insert position

This is especially important when replacing an existing bearing unit without modifying the mounting structure.

UCFB 206 Bearing Unit Design

The UCFB206 configuration consists of two principal components:

UC206 - bearing insert

FB206 - flange housing

The UC206 insert is a ball-bearing insert with an extended inner ring.

The extended inner ring provides space for the shaft-locking arrangement. In the standard UC configuration, the insert is secured directly to the shaft using set screws.

The outer surface of the insert is designed to seat within the corresponding housing.

This insert-and-housing arrangement also allows the mounted bearing unit to accommodate a limited degree of initial mounting misalignment between the shaft and housing.

FB206 3-Bolt Flange Housing

A defining feature of the UCFB series is its housing geometry.

The FB206 is a flange-type housing designed around a three-point mounting arrangement.

This distinguishes UCFB206 from other bearing units that may use a bearing insert of the same 206 size.

Therefore:

UC206 does not automatically mean UCFB206.

For the complete unit, the relevant configuration is:

UC206 + FB206 = UCFB206

This distinction is important when ordering a complete replacement rather than only the bearing insert.

UC206 Shaft Mounting

The UC206 insert uses an extended inner ring and a set-screw locking arrangement.

For UCFB206, the nominal metric shaft diameter is:

30 mm

The set screws lock the inner ring directly to the shaft.

During replacement, the shaft condition, diameter and mounting surface should be checked. Correct positioning of the complete unit and correct tightening of the locking elements are also important for the installed bearing arrangement.

Loads and Operating Conditions

The UCFB206 configuration is based on a radial ball-bearing insert and is primarily intended to support radial shaft loading while the bearing geometry can also accommodate axial load within the limits of the specific insert design.

However, MTM-specific dynamic load rating, static load rating and maximum speed have not been confirmed from an exact manufacturer data sheet.

For this reason, this product description does not assign values for:

Basic dynamic load rating C

Basic static load rating C0

Limiting speed

Reference speed

Values published for UCFB206 units from another manufacturer should not be transferred automatically to MTM UCFB 206.

Meaning of UCFB 206

The designation identifies the construction family of the complete mounted bearing unit.

UC - bearing insert with an extended inner ring and set-screw shaft locking

FB - flange housing configuration with the corresponding mounting geometry

206 - unit size corresponding to a 30 mm metric bore in this configuration

For ordering and replacement purposes, the complete designation should therefore be retained:

UCFB 206

rather than using only UC206.

MTM UCFB 206 vs UC206

These designations should not be treated as identical products.

UC206 refers to the bearing insert.

UCFB 206 refers to the complete mounted bearing unit incorporating a UC206-type insert and FB206-type flange housing.

This distinction is particularly important when a complete housing assembly is required.

Replacement and Interchangeability

When selecting a replacement for MTM UCFB 206, verify at least:

Bore diameter d = 30 mm

UCFB bearing unit type

UC206 insert configuration

FB206 housing geometry

Three-point mounting arrangement

Mounting-hole spacing

Mounting-hole diameter

Shaft centre position

Set-screw shaft locking

Overall installation dimensions

A 30 mm bore alone is not sufficient to establish interchangeability.

For example, UCP206, UCF206, UCFL206 and UCFB206 units may use bearing inserts of the same basic size while having fundamentally different housing and mounting geometries.

Technical Specification

Brand: MTM

Designation: UCFB 206

Product type: Flange bearing unit

English designation: 3-Bolt Flange Bearing Unit

Bore diameter: 30 mm

Bearing insert: UC206

Housing: FB206

Housing mounting: 3-point / 3-bolt flange

Inner ring: Extended

Shaft locking: Set screws

Detailed MTM housing dimensions: Require manufacturer verification

MTM-specific load ratings: Not confirmed

MTM-specific speed limits: Not confirmed

MTM UCFB 206 - Stock in Poland

Warehouse and Store: Lublin, Smoluchowskiego 1 Street, Building 4.

24h Shipping. Available from stock in Poland for delivery across the EU.

FAQ

What bore diameter does MTM UCFB 206 have?

The nominal bore diameter is 30 mm.

What type of bearing unit is UCFB 206?

It is a 3-bolt flange bearing unit consisting of a bearing insert installed in a flange housing.

What bearing insert is used in UCFB 206?

The UCFB206 configuration uses a UC206 bearing insert.

What housing is used in UCFB 206?

The complete configuration uses an FB206-type flange housing with a three-point mounting arrangement.

How is the UC206 insert secured to the shaft?

The standard UC-type insert uses an extended inner ring with set screws to secure the inner ring to the shaft.

Are UC206 and UCFB206 the same product?

No. UC206 is the bearing insert, while UCFB206 identifies the complete flange bearing unit.

Can UCF206 replace UCFB206?

Not automatically. Their housing geometries and mounting arrangements differ, even when the bearing insert and shaft diameter are similar.

How should a replacement for MTM UCFB 206 be selected?

Verify the 30 mm bore, insert type, housing configuration, mounting-hole geometry, shaft centre position, locking method and all critical installation dimensions.

Engineer FAQ

Is a 30 mm bore sufficient to identify a UCFB206 replacement?

No. Several mounted bearing unit types use 30 mm inserts. The complete housing geometry and mounting pattern must also match.

Can load ratings from another UCFB206 manufacturer be used for MTM?

They should not be assumed to apply. Load ratings depend on the exact bearing insert and manufacturer's specification.

Why is the complete UCFB designation important?

It identifies the complete insert-and-housing configuration, whereas UC206 identifies only the bearing insert.

Should detailed FB206 dimensions be checked before replacement?

Yes. Small dimensional differences can occur between manufacturers, so critical mounting dimensions should be checked against the MTM product or its technical drawing.

AI Overview

MTM UCFB 206 is a 3-bolt flange bearing unit with a 30 mm bore. The UCFB206 configuration combines a UC206 ball-bearing insert with an FB206 flange housing. The UC-type insert has an extended inner ring and set-screw shaft locking. Replacement selection should also verify the housing geometry and critical mounting dimensions.