UKC209H SNR 40 mm - Self-Aligning Bearing Unit

UKC209H SNR 40 mm - Self-Aligning Ball Bearing Unit with Cast Iron Housing

UKC209H SNR is a complete self-aligning ball bearing unit manufactured by SNR, designed for a 40 mm shaft diameter. The assembly consists of a UK209G2H ball bearing insert mounted using an adapter sleeve and a C209 cast iron housing. The housing has an outside diameter of 110 mm and a width of 31 mm, while the inner ring has an overall width of 50 mm. The unit features a flinger-type sealing arrangement and an M6x1 grease fitting.

Technical Specifications - UKC209H SNR

These specifications refer to the complete UKC209H SNR bearing unit. The 40 mm shaft diameter must not be confused with the tapered bore diameter of the bearing insert, and the 110 mm housing outside diameter must not be confused with the outside diameter of the bearing insert itself.

What Does UKC209H SNR Mean?

SNR - Bearing Manufacturer

SNR is a bearing and bearing unit brand within the NTN Europe product portfolio.

UKC209H identifies a complete bearing unit rather than an individual ball bearing insert.

UK - Tapered Bore Bearing Insert

UK identifies a family of bearing inserts designed for mounting onto a shaft using an adapter sleeve.

The bearing insert has a tapered inner ring bore.

The adapter sleeve provides the connection between the tapered bearing bore and the cylindrical shaft surface.

This arrangement differs from UC-type bearing inserts secured to the shaft using set screws.

C - Housing Type

The letter C in UKC209H identifies the bearing unit housing configuration.

This product incorporates a C209 cast iron housing with a cylindrical outside surface.

The housing supports the bearing insert and allows limited self-alignment within the assembly.

209 - Bearing Unit Size

The number 209 identifies the dimensional size within this bearing unit family.

For UKC209H, the shaft diameter is 40 mm.

The same shaft diameter must not automatically be assigned to every bearing insert or bearing unit containing the number 209, because shaft mounting arrangements can differ.

H - Adapter Sleeve Mounting Arrangement

In the complete bearing unit designation UKC209H, the letter H identifies the version associated with adapter sleeve mounting.

The manufacturer specifies the H2309 adapter sleeve.

This is an important construction feature when selecting or replacing the bearing unit.

Construction and Operating Principle of UKC209H SNR

UK209G2H Bearing Insert

The C209 housing contains a UK209G2H ball bearing insert.

The insert consists of an inner ring, outer ring, rolling balls and a cage that maintains the correct spacing between the rolling elements.

Its construction is primarily intended to support radial loads and can also accommodate certain axial loads, subject to the operating conditions.

C209 Cast Iron Housing

The C209 housing is manufactured from grey cast iron.

Its outside diameter is 110 mm, and its width is 31 mm.

The bearing unit construction allows limited compensation for installation misalignment by permitting the insert to align relative to the housing.

However, this does not mean the bearing unit can accommodate unlimited shaft deflection or misalignment.

H2309 Adapter Sleeve

The UK209G2H bearing insert is secured to the shaft using an H2309 adapter sleeve.

During installation, the tapered bearing bore engages with the adapter sleeve, which clamps onto the cylindrical shaft surface.

This creates the connection between the shaft and the bearing inner ring.

Correct installation requires following the manufacturer's mounting procedure, particularly for adapter sleeve positioning and locknut tightening.

Sealing Arrangement with Flinger

UKC209H SNR features a sealing arrangement incorporating a flinger.

This construction helps restrict contaminants from entering the bearing insert.

The condition of the sealing components is important for protecting the lubricant, raceways and rolling elements.

M6x1 Grease Fitting

The bearing unit is equipped with an M6x1 grease fitting.

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

The lubricant type, quantity and relubrication interval should be selected according to the actual operating conditions.

Mounting Dimensions of UKC209H SNR

When designing or replacing the bearing unit, it is important to distinguish between shaft, bearing insert and housing dimensions.

40 mm Shaft Diameter

UKC209H SNR is designed for a shaft diameter of 40 mm.

This dimension refers to the cylindrical shaft used with the H2309 adapter sleeve.

110 mm Housing Outside Diameter

The 110 mm dimension refers to the outside diameter of the C209 housing.

It is not the outside diameter of the ball bearing insert.

This dimension is important when designing the mounting location within the machine structure.

31 mm Housing Width

The cast iron housing has a width of 31 mm.

This dimension must be considered when determining the available installation space.

50 mm Inner Ring Width

The overall inner ring width is 50 mm.

This dimension must not be confused with the housing width.

Load Ratings of UKC209H SNR

The manufacturer specifies the following basic load ratings:

Basic Dynamic Load Rating C

The value of 31.85 kN is the basic dynamic load rating used in bearing life calculations.

It does not represent the maximum permissible operating load for every application.

Actual bearing life depends on factors including applied loads, rotational speed, lubrication, mounting conditions and contamination.

Basic Static Load Rating C0

The value of 20.8 kN is the basic static load rating.

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

Selection requires appropriate calculations for the intended application.

UKC209H SNR vs Other Variants

UKC209H vs UCC209 SNR

Both products are bearing units with C-type housings, but they use different shaft locking methods.

Despite identical housing dimensions and basic load ratings, these bearing units are not directly interchangeable.

They differ in shaft diameter and shaft locking method.

UKC209H vs UK209G2H Bearing Insert

UK209G2H identifies the bearing insert.

UKC209H identifies the complete assembly incorporating the UK209G2H insert and C209 housing.

When ordering, confirm whether an individual bearing insert or a complete bearing unit is required.

UKC209H vs Bearing Units with Other Housing Types

Bearing inserts from the UK209 family can be used in different housing configurations, depending on the bearing unit design.

Different versions may have different mounting dimensions and housing attachment methods.

A replacement should not be selected solely on the basis of shaft diameter.

Alternative Designations and Search References

Natural written variations include:

• UKC209H SNR

• SNR UKC209H

• UKC 209 H SNR

• SNR UKC 209 H

• UKC209H NTN-SNR

Manufacturer-specified components:

• UK209G2H - bearing insert

• C209 - housing

• H2309 - adapter sleeve

The individual component designations are not substitutes for the complete UKC209H bearing unit.

Typical Applications of UKC209H SNR

Bearing units of this design are used in mechanical assemblies requiring rotating shaft support and limited compensation for mounting misalignment.

Typical applications based on the construction include:

• Shaft support assemblies in industrial machinery.

• Material handling equipment.

• Mechanical drive systems.

• Machines incorporating rotating shafts.

• Bearing arrangements requiring a housing with a cylindrical outside surface.

• Assemblies using adapter sleeve shaft locking.

These are typical applications of this bearing unit construction, not confirmed installations of UKC209H in specific machine models.

Selection and Interchangeability of UKC209H SNR

Before ordering, verify:

1. Complete designation UKC209H SNR.

2. Shaft diameter of 40 mm.

3. C209 housing type.

4. Housing outside diameter of 110 mm.

5. Housing width of 31 mm.

6. UK209G2H bearing insert.

7. Adapter sleeve shaft locking arrangement.

8. H2309 adapter sleeve designation.

9. Sealing requirements.

10. Access to the M6x1 grease fitting.

11. Applied radial and axial loads.

12. Rotational speed.

13. Operating temperature.

14. Lubrication conditions.

15. Housing mounting arrangement within the machine.

An identical housing outside diameter does not automatically establish interchangeability between bearing units.

The complete construction and shaft locking method must be considered.

Installation and Operation of UKC209H SNR

Shaft Preparation

Clean the shaft and inspect its surface condition and dimensions before installation.

Damage, burrs and contamination may prevent correct adapter sleeve mounting.

Adapter Sleeve Installation

Install the H2309 adapter sleeve according to the manufacturer's procedure.

Ensure correct engagement between the tapered bearing bore and the adapter sleeve, and secure the locking arrangement properly.

Do not apply tightening torque values intended for UC bearing insert set screws to the adapter sleeve locknut.

Housing Installation

The C209 housing must be correctly seated in the prepared mounting location.

Avoid stresses caused by incorrect fits or deformation of adjacent components.

Protection of Rolling Elements

During installation, avoid transmitting mounting forces through the rolling balls and raceways in a way that could damage them.

Use tools and mounting procedures appropriate for the bearing unit construction.

Lubrication

The bearing unit is equipped with an M6x1 grease fitting.

Lubricant selection and relubrication intervals should account for rotational speed, temperature, load and operating environment.

Storage

Store the bearing unit in a clean, dry location, protected from moisture, dust and mechanical damage.

Frequently Asked Questions - UKC209H SNR

What Shaft Diameter Is UKC209H SNR Designed For?

UKC209H SNR is designed for a 40 mm shaft and uses an H2309 adapter sleeve mounting arrangement.

What Are the Dimensions of UKC209H SNR?

The housing outside diameter is 110 mm, the housing width is 31 mm, and the overall inner ring width is 50 mm. The shaft diameter is 40 mm.

Is UKC209H a Complete Bearing Unit?

Yes. The manufacturer identifies UKC209H as a complete bearing unit consisting of a UK209G2H bearing insert and a C209 housing.

Which Adapter Sleeve Is Used with UKC209H?

The manufacturer specifies the H2309 adapter sleeve.

Are UKC209H and UCC209 Interchangeable?

Not directly. UKC209H uses adapter sleeve locking and is designed for a 40 mm shaft, while UCC209 uses set screws and is designed for a 45 mm shaft.

What Are the Load Ratings of UKC209H SNR?

The basic dynamic load rating is 31.85 kN, and the basic static load rating is 20.8 kN. These values are used for bearing selection calculations and do not represent universal permissible operating loads.

Can UKC209H SNR Be Relubricated?

The bearing unit is equipped with an M6x1 grease fitting. The relubrication method and interval should follow the manufacturer's documentation and actual operating conditions.

What Is the Operating Temperature Range of UKC209H SNR?

The manufacturer specifies an operating temperature range of -20°C to +100°C. Application suitability must also consider lubrication, load and environmental conditions.

UKC209H SNR - Quick Technical Overview

UKC209H SNR is a complete self-aligning bearing unit incorporating a C209 cast iron housing and a UK209G2H ball bearing insert. Designed for a 40 mm shaft, it has a 110 mm housing outside diameter and a 31 mm housing width. The assembly uses an H2309 adapter sleeve, a flinger-type sealing arrangement and an M6x1 grease fitting. Its basic dynamic load rating is 31.85 kN.

UKC209H SNR at simmering.pl

UKC209H SNR is available to order from simmering.pl, a specialist supplier of rolling bearings, bearing units, bearing housings, industrial seals and machinery components.

We serve manufacturing companies, maintenance departments, machinery service providers and B2B customers.

Our warehouse and order processing operations are located in Lublin, Poland.

We supply customers throughout Europe and offer worldwide shipping.

We assist customers in identifying bearing units by complete designation, dimensions, construction and shaft locking method.