SNR UCT206 30 mm - Cast Iron Take-Up Bearing Unit

UCT 206 SNR 30 mm - Cast Iron Take-Up Bearing Unit with Housing

UCT 206 SNR is a complete cast iron take-up bearing unit from the NTN-SNR range, designed for a 30 mm diameter shaft. It combines a T206 sliding take-up housing with a UC206G2 self-aligning insert ball bearing secured by set screws. The housing has an overall length of 113 mm and an H dimension of 102 mm. Its guided construction allows the shaft support position to be adjusted within a compatible take-up mechanism.

Technical Specifications - UCT 206 SNR

Technical distinction: UCT206 is the complete mounted bearing unit. T206 identifies the separate housing, while UC206G2 identifies the bearing insert.

The dynamic and static load ratings refer to the bearing insert. They must not be interpreted as the permissible load capacity of the entire take-up frame or tensioning mechanism.

What Does UCT 206 SNR Mean?

UC - Insert Ball Bearing

UC identifies a bearing insert family featuring a spherical outer ring surface and an extended inner ring secured to the shaft using set screws.

The UCT206 assembly uses a UC206G2 bearing insert.

Its nominal bore diameter is 30 mm, the outside diameter is 62 mm, and the inner ring width is 38.1 mm.

The spherical outer ring surface works with the matching housing seat to accommodate limited initial angular misalignment during installation.

T - Take-Up Housing

The letter T identifies the take-up housing configuration.

Unlike fixed pillow block or flange housings, a take-up housing is designed to move within a compatible guide system.

This arrangement allows the position of a rotating shaft to be adjusted, particularly where belt or chain tension must be controlled.

The housing requires a suitable external guide and adjustment mechanism. The UCT206 designation alone does not indicate that a complete take-up frame is included.

206 - Bearing Unit Size

The number 206 identifies the dimensional size of the bearing unit.

For the standard SNR UCT206, the nominal shaft diameter is 30 mm.

The designation does not independently specify a special internal clearance class, lubricant formulation or precision grade.

SNR - Manufacturer Brand

SNR is a brand within the NTN Group, a manufacturer of rolling bearings, mounted bearing units, bearing housings and industrial power transmission components.

Alternative Designations and Reference Numbers

The product may be listed under the following written forms:

• SNR UCT206

• UCT206 SNR

• SNR UCT 206

• UCT 206 SNR

• NTN-SNR UCT206

• UCT206 30 mm

• SNR UCT206 take-up bearing unit

• UCT206 cast iron bearing housing assembly

• UCT206 mounted bearing unit

Related component designations:

• T206 - separate cast iron take-up housing.

• UC206G2 - insert ball bearing.

These component numbers should not be used as direct substitutes for the complete UCT206 designation.

Construction and Operating Principle

Cast Iron T206 Take-Up Housing

The T206 housing is manufactured from grey cast iron and designed to slide within a compatible guide arrangement.

Its purpose is to locate the bearing insert, support the shaft and transfer operating forces into the surrounding machine structure.

The sliding housing geometry makes it possible to adjust the shaft position without relocating a fixed bearing mounting point.

The actual adjustment range depends on the external guide system and tensioning mechanism.

UC206G2 Insert Ball Bearing

The UC206G2 bearing insert contains an inner ring, outer ring, rolling balls, cage and sealing components.

Its spherical outer ring surface fits into the matching housing seat.

This allows limited angular adjustment between the bearing insert and housing during installation.

The insert primarily carries radial loads and can also accommodate axial loads within the limitations of its internal design and shaft locking arrangement.

The basic dynamic load rating is 19.5 kN, while the basic static load rating is 11.2 kN.

These values describe the bearing insert rather than the load capacity of the complete supporting structure.

Set Screw Shaft Locking

The UC206G2 insert is secured to the shaft by set screws located in the extended inner ring.

This arrangement prevents unintended relative movement between the bearing inner ring and shaft when correctly installed.

The shaft surface, diameter and set screw tightening procedure must comply with the manufacturer's installation requirements.

Bearing Sealing

The UC206G2 insert uses a sealing arrangement designed to retain lubricant and limit contamination of the rolling elements.

Flinger rings provide additional protection by helping deflect contaminants away from the bearing sealing area.

The arrangement is not automatically suitable for high-pressure washing, aggressive chemicals or other demanding environmental conditions without application-specific verification.

Adjustable Shaft Position

The UCT206 unit is designed to move within the guides of a suitable take-up mechanism.

This allows the shaft position to be adjusted to establish the required belt or chain tension.

The bearing unit itself does not determine the full adjustment travel, which depends on the external frame and machine design.

SNR UCT206 vs Related Components and Variants

UCT206 vs T206

UCT206 is a complete bearing unit containing both the take-up housing and bearing insert.

T206 identifies the separate cast iron housing without the bearing insert.

A customer requiring a complete assembled bearing unit should order UCT206 rather than T206.

UCT206 vs UC206G2

UC206G2 is the individual insert ball bearing designed for a nominal 30 mm shaft.

UCT206 combines that insert with the T206 take-up housing.

A replacement insert may be purchased separately when the housing remains suitable for reuse.

UCT206 vs UCT205

UCT205 and UCT206 belong to the same general take-up bearing unit family.

However, UCT205 is associated with a nominal 25 mm shaft, while UCT206 is designed for a 30 mm shaft.

The bearing insert size and housing dimensions differ.

They are not direct replacements.

UCT206 vs UCT207

UCT207 is a larger take-up bearing unit designed for a nominal 35 mm shaft.

Its housing and insert dimensions differ from those of UCT206.

Interchangeability must not be assumed based on similar external appearance.

Selection and Interchangeability

Before selecting SNR UCT206, verify:

1. Complete product designation UCT206.

2. Nominal shaft diameter of 30 mm.

3. Required T206 take-up housing configuration.

4. Guide dimensions and sliding surface geometry.

5. Housing overall length of 113 mm.

6. Housing H dimension of 102 mm.

7. Bearing insert designation UC206G2.

8. Shaft locking method.

9. Radial and axial operating loads.

10. Rotational speed.

11. Ambient temperature and contamination exposure.

12. Lubrication requirements.

13. Required shaft adjustment travel.

14. Compatibility with the existing take-up frame.

Is UCT206 Interchangeable Between Manufacturers?

Different manufacturers may offer take-up bearing units with similar UCT206 designations.

However, matching shaft diameter and similar housing dimensions do not guarantee full interchangeability.

The guide geometry, bearing centre position, housing dimensions, insert construction, shaft locking arrangement and operating ratings must be checked.

Identical nominal dimensions are not sufficient evidence of complete mechanical interchangeability.

Typical Applications of UCT206 SNR

The UCT206 construction is intended for machinery requiring an adjustable shaft support.

Typical applications for this type of take-up bearing unit include:

• Belt conveyor systems.

• Chain conveyor systems.

• Material handling equipment.

• Adjustable shaft support assemblies.

• Belt tensioning mechanisms.

• Industrial machinery incorporating guided take-up arrangements.

These are typical applications based on the bearing unit design, not verified OEM applications for a specific machine model.

Suitability for an individual machine must be confirmed against its technical requirements.

Installation and Maintenance

Preparing the Guides

The take-up frame guides should be clean, correctly aligned and free from damage.

The housing must be able to move along the intended adjustment path without binding.

Installing the Bearing on the Shaft

Verify the shaft diameter and surface condition before installation.

Avoid applying installation forces through the rolling elements, as this may damage the raceways.

Securing the Bearing Insert

Tighten the set screws according to the manufacturer's installation procedure.

Correct tightening is essential for maintaining the intended connection between the shaft and inner ring.

Adjusting Belt or Chain Tension

Set the required tension according to the machine manufacturer's instructions.

Excessive tension can increase bearing loading and reduce operating life.

Lubrication and Inspection

Lubrication requirements should be determined from the bearing insert documentation and operating conditions.

Inspect the bearing seals, shaft locking, housing position, temperature, noise and vibration during routine maintenance.

Storage

Store the bearing unit in a clean, dry environment.

Protect the bearing seals and housing seating surfaces from contamination, corrosion and mechanical damage.

Frequently Asked Questions - SNR UCT206

What is SNR UCT206?

SNR UCT206 is a complete cast iron take-up bearing unit combining a T206 sliding housing with a UC206G2 insert ball bearing.

What shaft diameter does UCT206 fit?

The nominal shaft diameter is 30 mm.

What are the main dimensions of SNR UCT206?

The housing has an overall length of 113 mm and an H dimension of 102 mm. The bearing insert has a 30 mm bore, 62 mm outside diameter and 38.1 mm inner ring width.

Is UCT206 a housing only?

No. UCT206 identifies the complete bearing unit. The separate housing is designated T206.

Which bearing insert is used in SNR UCT206?

The standard assembly uses a UC206G2 insert ball bearing secured to the shaft with set screws.

What is the load rating of UCT206?

The bearing insert has a basic dynamic load rating of 19.5 kN and a basic static load rating of 11.2 kN. These values do not define the maximum load capacity of the complete tensioning frame.

Can UCT206 be used for belt tensioning?

Yes, when installed in a suitable guided take-up mechanism. The actual tensioning capability depends on the machine design, adjustment system and bearing loading.

Can UCT206 be replaced with a unit from another manufacturer?

Only after confirming the guide dimensions, housing geometry, shaft centre position, bearing insert configuration and operating requirements.

SNR UCT206 - Key Technical Information

SNR UCT206 is a complete cast iron take-up bearing unit designed for a 30 mm shaft. It combines a T206 sliding housing with a UC206G2 insert ball bearing secured by set screws. The housing measures 113 mm in length, with an H dimension of 102 mm. Its guided construction enables adjustable shaft positioning in compatible tensioning mechanisms.

SNR UCT206 at simmering.pl

SNR UCT206 is offered by simmering.pl, a specialist supplier of rolling bearings, bearing housings, mounted bearing units and industrial sealing components.

We serve industrial maintenance departments, machinery manufacturers, mechanical repair workshops and B2B purchasing teams.

Our warehouse and order processing operations are located in Lublin, Poland. We supply customers throughout Europe and offer worldwide shipping.