SNR UCP206 30 mm 165x83 mm - Pillow Block Bearing Unit

SNR UCP206 30 mm 165x83 mm - Pillow Block Bearing Unit

SNR UCP206 is a complete self-aligning pillow block bearing unit manufactured under the SNR brand of the NTN Group, designed for a 30 mm shaft. It consists of a P206 cast iron housing and a UC206G2 insert ball bearing secured to the shaft by set screws. The housing is 165 mm long and 83 mm high, with 121 mm mounting hole spacing and a shaft centre height of 42.9 mm. The insert features a spherical outer ring and seals with an additional flinger.

Technical Specifications - SNR UCP206

Important: UCP206 identifies the complete mounted bearing unit. UC206G2 identifies the individual insert ball bearing, while P206 identifies the housing alone.

The dimensions 165x83 mm describe the housing length and overall height. They are not the dimensions of the bearing insert.

The basic dynamic and static load ratings refer to the UC206G2 insert, not to the load-carrying capacity of the complete housing, mounting bolts or supporting machine structure.

What Does SNR UCP206 Mean?

UC - Insert Ball Bearing with Set Screw Locking

UC identifies an insert ball bearing series used in self-aligning mounted bearing units.

The UC206G2 insert has a cylindrical bore diameter of 30 mm and is secured to the shaft using set screws.

Its spherical outer ring allows installation in a corresponding spherical housing seat.

P - Pillow Block Housing

P identifies a pillow block housing.

This construction features a mounting base with two elongated mounting holes.

The P206 housing supports a rotating shaft at a defined height above the mounting surface.

For UCP206, the shaft centre height is 42.9 mm.

This dimension is particularly important when replacing a bearing unit in an existing machine.

206 - Bearing Unit Size

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

For UCP206, the nominal shaft diameter is 30 mm.

This size corresponds to the combination of a P206 housing and a UC206G2 insert ball bearing.

G2 - SNR Bearing Insert Version

G2 is part of the UC206G2 manufacturer's designation.

It should not automatically be interpreted as C3 internal clearance, a particular grease specification or a precision class.

The complete designation should be retained when identifying or ordering a replacement bearing insert.

SNR - NTN Group Brand

SNR is a brand within the NTN Group, a manufacturer of rolling bearings, insert ball bearings, bearing housings and complete mounted bearing units.

Alternative Designations and Reference Numbers

The product may appear in technical catalogues, distributor listings and purchasing enquiries under the following written forms:

• SNR UCP206

• UCP206 SNR

• UCP 206 SNR

• SNR UCP 206

• NTN-SNR UCP206

• UCP206 30 mm

• UCP206 165x83 mm

• SNR UCP206 pillow block bearing

• UCP206 mounted bearing unit

• UCP206 two-bolt pillow block

Related component designations:

• P206 - pillow block housing without the bearing insert.

• UC206G2 - individual insert ball bearing.

• UCP206 - complete bearing unit containing the housing and insert.

Related NTN catalogue designation:

• UCP206D1 - NTN bearing unit of corresponding dimensional size, requiring verification of the specific version before substitution.

The designations of individual components should not be confused with the designation of the complete bearing unit.

Construction and Operating Principle of SNR UCP206

P206 Cast Iron Pillow Block Housing

The P206 housing is manufactured from grey cast iron.

Its overall length is 165 mm, and its total height is 83 mm.

The mounting base has two elongated mounting slots measuring 17x21 mm.

The mounting hole centre spacing is 121 mm.

The housing transfers loads from the bearing insert to the machine mounting surface.

Shaft Centre Height - 42.9 mm

Shaft centre height is one of the most important dimensions when selecting a replacement pillow block bearing unit.

For SNR UCP206, the shaft centre height is 42.9 mm.

This dimension is measured from the housing mounting base to the centreline of the shaft.

When replacing an existing bearing unit, the centre height must be checked to avoid changes in the alignment of the drive system, conveyor or rotating shaft assembly.

UC206G2 Insert Ball Bearing

The P206 housing contains a UC206G2 insert ball bearing.

It is a single-row ball bearing with a cylindrical bore diameter of 30 mm.

The inner ring width is 38.1 mm.

The bearing has a spherical outer ring and is secured to the shaft using set screws.

Self-Aligning Bearing Arrangement

The spherical outer ring surface fits into a corresponding spherical seat in the housing.

This arrangement allows limited angular adjustment during installation.

It helps accommodate small initial alignment errors between the shaft and housing.

However, it does not permit unrestricted operating misalignment.

Sealing Arrangement with Flinger

The UC206G2 insert is equipped with seals incorporating an additional flinger.

The flinger helps reduce the entry of contaminants into the sealing area.

This arrangement supports the protection of the rolling elements, raceways and lubricant.

Sealing effectiveness depends on environmental and operating conditions.

Set Screw Shaft Locking

The insert is secured directly to a nominal 30 mm shaft.

The set screws are located in the bearing inner ring.

The manufacturer's recommended tightening torque is 5.5 Nm.

Before installation, the shaft surface should be inspected to ensure proper seating and secure locking.

M6x1 Grease Fitting

The housing has a grease fitting connection with an M6x1 thread.

This allows lubrication maintenance according to the manufacturer's recommendations.

Relubrication intervals depend on load, rotational speed, operating temperature and environmental conditions.

Load Ratings of SNR UCP206

Basic Dynamic Load Rating C - 19.5 kN

The basic dynamic load rating of the UC206G2 bearing insert is 19.5 kN.

This parameter is used when calculating bearing fatigue life under operating loads.

It does not represent the maximum permissible load of the complete pillow block bearing unit.

Basic Static Load Rating C0 - 11.2 kN

The basic static load rating of the insert is 11.2 kN.

This parameter is used to evaluate loads that may cause permanent deformation at the contact points between the rolling elements and raceways.

The strength of the housing, mounting bolts and supporting structure must also be considered during machine design.

SNR UCP206 vs Other Bearing Unit Variants

UCP206 vs UC206G2

UCP206 is a complete pillow block bearing unit containing a P206 housing and a UC206G2 insert.

UC206G2 is the individual insert ball bearing.

If only the insert is damaged, the condition of the housing should be checked before deciding to replace the bearing insert alone.

UCP206 vs P206

P206 identifies the pillow block housing without the bearing insert.

It does not include the ball bearing.

UCP206 identifies the complete assembly containing both the housing and bearing insert.

UCP206 vs USP206

UCP206 and USP206 belong to pillow block bearing unit families of corresponding mounting size.

UCP206 uses a UC206G2 insert with an inner ring width of 38.1 mm.

USP206 uses a US-series insert with an inner ring width of 30 mm.

These arrangements differ in bearing insert construction and axial dimensions.

Complete interchangeability should not be assumed without checking installation requirements.

UCP206 vs UCP205

UCP205 is a smaller pillow block bearing unit designed for a nominal 25 mm shaft.

These bearing units are not directly interchangeable.

UCP206 vs UCP207

UCP207 is a larger pillow block bearing unit designed for a nominal 35 mm shaft.

Its housing is 167 mm long, with mounting hole spacing of 127 mm and a shaft centre height of 47.6 mm.

It is not a direct replacement for UCP206.

UCP206 vs UCF206

UCP206 is a pillow block bearing unit with a mounting base and two elongated mounting holes.

UCF206 is a square flange bearing unit with four mounting holes.

Both units may incorporate a UC206G2 insert, but their mounting geometries are different.

They are not directly interchangeable without modifications to the mounting arrangement.

Selection and Interchangeability of SNR UCP206

Before ordering, verify the following:

1. Complete manufacturer designation UCP206.

2. Manufacturer and required bearing unit version.

3. Nominal shaft diameter of 30 mm.

4. Housing overall length of 165 mm.

5. Housing overall height of 83 mm.

6. Shaft centre height of 42.9 mm.

7. Mounting hole centre spacing of 121 mm.

8. Elongated mounting slot dimensions of 17x21 mm.

9. Housing width of 48 mm.

10. UC206G2 bearing insert designation.

11. Set screw shaft locking arrangement.

12. Bearing sealing configuration.

13. Required internal clearance.

14. Radial and axial operating loads.

15. Rotational speed.

16. Operating temperature.

17. Lubrication conditions.

18. Strength of the mounting surface and bolts.

Can UCP206 Be Replaced by a Bearing Unit from Another Manufacturer?

Pillow block bearing units designated UCP206 are available from different manufacturers.

However, an identical size designation does not automatically guarantee compatibility in every technical detail.

Before replacement, compare the shaft centre height, mounting hole spacing, mounting slot dimensions, housing geometry, insert type, shaft locking method and operating specifications.

A matching 30 mm shaft diameter alone is not sufficient to confirm interchangeability.

Applications of SNR UCP206

UCP-series pillow block bearing units are designed to support rotating shafts in industrial machinery and equipment.

Typical applications of this construction include:

• Belt conveyor systems.

• Roller conveyor systems.

• Material handling equipment.

• Production machinery.

• Drive and auxiliary shafts.

• Shaft support arrangements in machine structures.

• Equipment designed to use replaceable insert ball bearings.

These are typical applications of pillow block bearing units, not a verified list of specific machine models originally equipped with SNR UCP206.

Selection for a particular application requires consideration of load, rotational speed, mounting geometry and environmental conditions.

Installation and Operating Recommendations

Mounting Surface Preparation

The housing base should rest on a clean, flat and sufficiently rigid mounting surface.

Uneven surfaces may introduce unwanted stresses into the housing and negatively affect bearing operation.

Housing Installation

The unit is mounted using two elongated mounting slots.

The mounting hole centre spacing is 121 mm, and the slot dimensions are 17x21 mm.

Mounting bolts and their tightening torque should be selected according to the machine design.

Shaft Installation

The shaft should have a nominal diameter of 30 mm.

Before installation, remove burrs, contamination and corrosion.

Tighten the UC206G2 insert set screws using the manufacturer's recommended torque of 5.5 Nm.

Shaft Alignment

The shaft centre height from the mounting base is 42.9 mm.

When replacing an existing bearing unit, verify that this dimension matches the machine requirements.

The spherical outer ring allows limited angular adjustment during installation.

Lubrication

The bearing unit has an M6x1 grease fitting connection.

Lubrication should follow the manufacturer's recommendations and actual operating conditions.

Do not introduce an incompatible lubricant without checking its suitability.

Operating Inspection

During operation, regularly inspect:

• Bearing temperature.

• Noise and vibration.

• Seal condition.

• Shaft locking stability.

• Housing mounting bolt tightness.

• Lubrication condition.

• Signs of corrosion or housing damage.

Storage

Store the bearing unit in a clean, dry environment, preferably in its original packaging.

Protect the bearing insert, seals and mounting surfaces against moisture, dust and mechanical damage.

Frequently Asked Questions - SNR UCP206

What are the dimensions of SNR UCP206?

The bearing unit is designed for a 30 mm shaft. The housing is 165 mm long, 83 mm high and 48 mm wide. The mounting hole spacing is 121 mm, and the shaft centre height from the mounting base is 42.9 mm.

What does UCP206 mean?

UC identifies an insert ball bearing secured to the shaft by set screws. P identifies a pillow block housing, and 206 specifies the bearing unit size designed for a nominal 30 mm shaft.

Which bearing insert is used in SNR UCP206?

The unit incorporates an SNR UC206G2 insert ball bearing with a cylindrical 30 mm bore and a spherical outer ring.

Does UCP206 Include Both the Housing and Bearing?

Yes. UCP206 is a complete mounted bearing unit consisting of a P206 cast iron housing and a UC206G2 insert ball bearing.

What Is the Shaft Centre Height of UCP206?

The shaft centre height is 42.9 mm, measured from the housing mounting base. This is an important dimension when selecting a replacement unit.

What Is the Mounting Hole Spacing of UCP206?

The mounting hole centre spacing is 121 mm. The elongated mounting slots measure 17x21 mm.

What Are the Load Ratings of SNR UCP206?

The UC206G2 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 represent the maximum permissible load of the complete unit, including the housing and mounting bolts.

Are UCP206 and USP206 Interchangeable?

Interchangeability should not be assumed automatically. The units have corresponding mounting dimensions but differ in the construction and inner ring width of their bearing inserts.

SNR UCP206 - Key Technical Information

SNR UCP206 is a complete self-aligning pillow block bearing unit from the NTN Group, designed for a 30 mm shaft. It combines a P206 cast iron housing with a UC206G2 insert secured by set screws. The housing measures 165x83 mm, with 121 mm mounting hole spacing and a 42.9 mm shaft centre height. The insert's basic dynamic load rating is 19.5 kN, and its static rating is 11.2 kN.

SNR UCP206 at simmering.pl

SNR UCP206 is offered by simmering.pl, a specialist supplier of rolling bearings, self-aligning bearing inserts, bearing housings and complete mounted bearing units.

We serve machinery manufacturers, industrial maintenance departments, 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.