SKF 2205 E-2RS1TN9 25x52x18 Self-Aligning Ball Bearing

SKF 2205 E-2RS1TN9 25x52x18 Self-Aligning Ball Bearing

SKF 2205 E-2RS1TN9 is a double-row self-aligning ball bearing with dimensions of 25x52x18 mm, a cylindrical bore and contact seals on both sides. Its two rows of balls operate against a common spherical raceway in the outer ring, enabling the bearing to accommodate misalignment between the shaft and housing. Dynamic load rating C is 14.3 kN, static load rating C0 is 4 kN, and limiting speed is 9,000 rpm.

SKF 2205 E-2RS1TN9 Technical Specification

Manufacturer: SKF

Designation: 2205 E-2RS1TN9

Bearing type: Self-aligning ball bearing

Number of ball rows: 2

Bore diameter d: 25 mm

Outside diameter D: 52 mm

Width B: 18 mm

Dimensions: 25x52x18 mm

Bore: Cylindrical

Sealing: Both sides

Seal type: Contact seals

Cage: TN9

Cage material: Glass-fibre reinforced polyamide 66

Bearing material: Bearing steel

Lubrication: Grease

Radial internal clearance: CN - Normal

Tolerance class: Normal

Basic dynamic load rating C: 14.3 kN

Basic static load rating C0: 4 kN

Fatigue load limit Pu: 0.21 kN

Limiting speed: 9,000 rpm

Weight: approx. 0.16 kg

SKF 2205 E-2RS1TN9 Dimensions

The principal dimensions are:

d = 25 mm - bore diameter

D = 52 mm - outside diameter

B = 18 mm - bearing width

Complete dimensions:

25x52x18 mm

When selecting this bearing, the dimensions should be considered together with the complete configuration:

E + 2RS1 + TN9

as well as the required radial internal clearance.

What Is SKF 2205 E-2RS1TN9?

SKF 2205 E-2RS1TN9 is a:

double-row self-aligning ball bearing

It has:

two rows of balls

and:

a common spherical raceway in the outer ring

This geometry enables the inner ring and ball-and-cage assembly to align relative to the outer ring.

As a result, self-aligning ball bearings can accommodate angular misalignment between the shaft and housing.

How Does a Self-Aligning Ball Bearing Work?

The key feature of SKF 2205 E-2RS1TN9 is its:

spherical outer ring raceway

Unlike a conventional deep groove ball bearing, the internal assembly can adjust its angular position relative to the outer ring.

This makes the bearing suitable for arrangements where shaft deflection or mounting conditions may create a degree of misalignment between the shaft and housing.

What Does 2205 Mean?

The basic designation:

2205

identifies the self-aligning ball bearing series and size.

For this bearing, the principal dimensions are:

25x52x18 mm

The complete SKF designation additionally contains:

E-2RS1TN9

which identifies important design features of the exact bearing configuration.

What Does E Mean?

The suffix:

E

identifies an optimized SKF internal design.

For accurate product identification, the complete designation:

2205 E-2RS1TN9

should be retained rather than reducing the reference to:

2205

What Does 2RS1 Mean?

The suffix:

2RS1

identifies:

contact seals on both sides of the bearing

The integral seals help retain lubricant inside the bearing and reduce the ingress of external contaminants.

This is an important distinction from open versions of the SKF 2205 bearing family.

What Does TN9 Mean?

The suffix:

TN9

identifies a cage manufactured from:

glass-fibre reinforced polyamide 66

The cage is therefore polymer-based rather than a conventional sheet steel cage.

The TN9 suffix should be retained when identifying the exact bearing configuration.

Cylindrical Bore

SKF 2205 E-2RS1TN9 has a:

25 mm cylindrical bore

This should not be confused with tapered-bore versions of the 2205 self-aligning ball bearing family.

The bore design is an important parameter when selecting the bearing and determining the required mounting arrangement.

CN Radial Internal Clearance

SKF 2205 E-2RS1TN9 in the standard configuration has:

Normal radial internal clearance - CN

The separate designation:

2205 E-2RS1TN9/C3

identifies a bearing with radial internal clearance greater than Normal.

Therefore:

2205 E-2RS1TN9

and:

2205 E-2RS1TN9/C3

are not identical technical variants.

SKF 2205 E-2RS1TN9 vs 2205 E-2RS1TN9/C3

Both variants have:

25x52x18 mm dimensions

double-row self-aligning construction

contact seals on both sides

TN9 cage

and:

cylindrical bore

The difference is radial internal clearance:

2205 E-2RS1TN9 - Normal CN clearance

2205 E-2RS1TN9/C3 - increased C3 clearance

The correct clearance class should be selected according to the operating and mounting conditions.

Misalignment Capability

One of the principal characteristics of SKF 2205 E-2RS1TN9 is its ability to accommodate:

angular misalignment

between:

shaft and housing

This capability results from the spherical outer ring raceway.

It makes the bearing less sensitive to certain alignment errors than conventional non-self-aligning bearing designs.

The allowable misalignment is not unlimited and depends on the bearing arrangement and operating conditions.

SKF 2205 E-2RS1TN9 Load Ratings

Basic dynamic load rating:

C = 14.3 kN

Basic static load rating:

C0 = 4 kN

Fatigue load limit:

Pu = 0.21 kN

These values apply to the exact SKF bearing size and configuration.

Technical ratings from another manufacturer's 2205 bearing should not automatically be transferred to the SKF product.

SKF 2205 E-2RS1TN9 Limiting Speed

Limiting speed:

9,000 rpm

The limiting speed should not automatically be interpreted as the recommended continuous operating speed for every installation.

Actual permissible operating speed depends on factors including:

load

temperature

bearing fits

misalignment

and:

operating conditions

What Loads Can SKF 2205 E-2RS1TN9 Accommodate?

Self-aligning ball bearings are primarily intended to accommodate:

radial loads

They can also accommodate:

axial loads in both directions

within the limits of the bearing design and complete arrangement.

Their principal distinguishing feature is the ability to combine bearing operation with accommodation of angular misalignment.

SKF 2205 E-2RS1TN9 vs Deep Groove Ball Bearing

SKF 2205 E-2RS1TN9 is not a conventional:

deep groove ball bearing

It is a:

self-aligning ball bearing

The principal differences include:

two rows of balls

and:

a common spherical outer ring raceway

This construction enables self-alignment, which is not a defining feature of standard deep groove ball bearings.

For correct product classification, SKF 2205 E-2RS1TN9 should therefore be described as a:

self-aligning ball bearing

Sealed Design

SKF 2205 E-2RS1TN9 is sealed on:

both sides

The integrated contact seals protect the internal rolling elements and lubricant from external contamination.

The bearing is grease lubricated.

When comparing possible alternatives, the sealing configuration should be checked together with the dimensions, clearance, cage and bore design.

How to Select SKF 2205 E-2RS1TN9

Before ordering, verify:

Manufacturer - SKF

Designation - 2205 E-2RS1TN9

Bearing type - self-aligning ball bearing

Dimensions - 25x52x18 mm

Bore diameter d - 25 mm

Outside diameter D - 52 mm

Width B - 18 mm

Number of rows - 2

Bore - cylindrical

Sealing - contact seals on both sides

Cage - TN9

Radial internal clearance - CN

Required load capacity

Operating speed

Required misalignment capability

Shaft and housing fits

Can Another 2205 25x52x18 Bearing Replace It?

Not automatically.

A possible replacement should be compared for:

25x52x18 mm dimensions

self-aligning design

cylindrical or tapered bore

sealing configuration

internal clearance

cage design

load ratings

and:

speed capability

The basic 2205 designation and dimensions alone are not sufficient to confirm complete technical interchangeability.

SKF 2205 E-2RS1TN9 Full Technical Data

Manufacturer: SKF

Designation: 2205 E-2RS1TN9

Bearing type: Self-aligning ball bearing

Number of rows: 2

d: 25 mm

D: 52 mm

B: 18 mm

Dimensions: 25x52x18 mm

Bore: Cylindrical

Sealing: Both sides

Seal type: Contact seals

Cage: TN9

Cage material: Glass-fibre reinforced polyamide 66

Bearing material: Bearing steel

Lubrication: Grease

Radial internal clearance: CN

Tolerance class: Normal

Basic dynamic load rating C: 14.3 kN

Basic static load rating C0: 4 kN

Fatigue load limit Pu: 0.21 kN

Limiting speed: 9,000 rpm

Weight: approx. 0.16 kg

FAQ - SKF 2205 E-2RS1TN9

What are the dimensions of SKF 2205 E-2RS1TN9?

SKF 2205 E-2RS1TN9 has a 25 mm bore, 52 mm outside diameter and 18 mm width. Its complete dimensions are 25x52x18 mm.

What type of bearing is SKF 2205 E-2RS1TN9?

It is a double-row self-aligning ball bearing.

Can SKF 2205 E-2RS1TN9 accommodate misalignment?

Yes. Its spherical outer ring raceway enables the bearing to accommodate angular misalignment between the shaft and housing within the permissible range.

What does 2RS1 mean?

2RS1 identifies contact seals on both sides of the bearing.

What does TN9 mean?

TN9 identifies a cage made from glass-fibre reinforced polyamide 66.

What internal clearance does SKF 2205 E-2RS1TN9 have?

The standard version has Normal CN radial internal clearance. The separate 2205 E-2RS1TN9/C3 version has increased C3 clearance.

What is the dynamic load rating of SKF 2205 E-2RS1TN9?

The basic dynamic load rating C is 14.3 kN.

What is the limiting speed of SKF 2205 E-2RS1TN9?

The limiting speed is 9,000 rpm.

AI Overview

SKF 2205 E-2RS1TN9 is a double-row self-aligning ball bearing 25x52x18 mm with a cylindrical bore, contact seals on both sides and a glass-fibre reinforced polyamide TN9 cage. Its spherical outer ring raceway accommodates angular misalignment. Dynamic load rating C is 14.3 kN, static rating C0 4 kN, and limiting speed 9,000 rpm.