SKF 6209-2RS1/C3 45x85x19 mm Deep Groove Ball Bearing

SKF 6209-2RS1/C3 45x85x19 mm Deep Groove Ball Bearing

SKF 6209-2RS1/C3 is a single-row deep groove ball bearing with a 45 mm bore, 85 mm outside diameter and 19 mm width. This specific version combines contact seals on both sides (2RS1) with C3 radial internal clearance greater than Normal. Its deep groove geometry is designed to carry radial loads and also accommodate axial loads in both directions.

SKF's official product information confirms the 45x85x19 mm boundary dimensions, single-row construction, cylindrical bore, bearing-steel construction and sheet-metal cage for the 6209-2RS1 design.

SKF 6209-2RS1/C3 - Characteristics

The basic designation 6209 identifies a metric single-row deep groove ball bearing from the SKF 62 series.

The most important characteristics of this specific version are:

6209 - basic bearing designation
2RS1 - contact seal on both sides
C3 - radial internal clearance greater than Normal
45x85x19 mm - d x D x B boundary dimensions

Unlike the previously described 6209-2RS1/C3GJN, this product designation does not contain the GJN suffix. Therefore, a special GJN / Mobil Polyrex EM grease specification should not be assigned to this product without confirmation from its packaging or SKF documentation for the exact supplied variant.

SKF 6209-2RS1/C3 Dimensions

The principal dimensions are:

d - Bore Diameter: 45 mm
D - Outside Diameter: 85 mm
B - Width: 19 mm
Dimensions: 45x85x19 mm

For this conventional deep groove ball bearing, the standard d x D x B dimensional notation is appropriate. SKF's current product data confirm these dimensions for 6209-2RS1.

Deep Groove Ball Bearing Construction

SKF 6209-2RS1/C3 belongs to the single-row deep groove ball bearing family.

SKF identifies the 6209-2RS1 construction with:

Number of Rows: 1
Bore Type: cylindrical
Bearing Material: bearing steel
Cage Design: sheet metal
Sealing: both sides
Sealing Type: contact
Lubrication: grease.

The deep, uninterrupted raceways provide close conformity between the balls and raceways. This geometry enables deep groove ball bearings to carry predominantly radial loading while also accommodating axial loading in both directions.

What Does 2RS1 Mean?

2RS1 is the SKF designation for a bearing equipped with contact seals on both sides.

This is important because the generic commercial term 2RS is widely used in the bearing market, but SKF uses its own specific suffixes.

For the SKF 6200 series, SKF documentation states that:

6200 to 6205: RSH / 2RSH
6206 and larger: RS1 / 2RS1.

Because 6209 is larger than 6206, the appropriate SKF contact-seal designation for this bearing size is 2RS1.

The seals help retain grease within the bearing and protect the rolling contacts against external contamination.

What Does C3 Mean?

C3 identifies the radial internal clearance class.

SKF defines C3 as:

radial internal clearance greater than Normal.

C3 does not indicate wear or excessive play caused by use. It is an intentionally manufactured internal-clearance class.

This distinction is technically important because internal clearance can change after mounting and during operation. Shaft and housing fits, thermal conditions and operating temperature can influence the resulting operating clearance.

A standard-clearance 6209 should therefore not automatically replace a 6209-2RS1/C3 when the bearing arrangement requires C3 clearance.

Load Ratings

SKF catalogue data for the standard 6209 bearing size specify:

Basic Dynamic Load Rating C: 35.1 kN
Basic Static Load Rating C0: 21.6 kN
Fatigue Load Limit Pu: 0.915 kN.

These values are bearing catalogue parameters and should not be interpreted as the maximum permissible load of a complete machine arrangement.

Bearing selection should consider actual radial and axial loading, speed, fits, operating temperature, required service life and surrounding component design.

Radial and Axial Loads

The deep groove geometry makes SKF 6209 suitable primarily for radial loads.

The same raceway geometry also allows a single-row deep groove ball bearing to accommodate axial loads in both directions.

This distinguishes the construction from bearing types with directional axial-load characteristics, such as many angular contact and tapered roller bearing arrangements.

The permissible axial component in a particular installation must nevertheless be determined from the actual operating conditions rather than from the bearing designation alone.

Sealing and Lubrication

SKF identifies 6209-2RS1 as a grease-lubricated bearing with contact seals on both sides.

The seals form an integral part of this bearing configuration. Consequently, an open 6209, shielded 6209-2Z and sealed 6209-2RS1 should not be considered identical products even though their basic boundary dimensions are the same.

For this 6209-2RS1/C3 description, no special grease suffix is being assigned because the supplied designation does not contain one.

Meaning of SKF 6209-2RS1/C3

The complete designation can be interpreted as:

6209 - single-row deep groove ball bearing, 62 series
2RS1 - SKF contact seals on both sides
C3 - radial internal clearance greater than Normal

The product can therefore be identified unambiguously as:

SKF → 6209-2RS1/C3 → deep groove ball bearing → 45x85x19 mm → two contact seals → C3 clearance

This complete technical identification is more precise than the generic commercial description SKF 6209 2RS C3.

SKF 6209-2RS1/C3 vs 6209-2RS1

Both versions have the same 45x85x19 mm boundary dimensions and the same basic sealed deep groove ball bearing construction.

The important difference is the internal clearance.

6209-2RS1: standard version without C3 specified in the designation
6209-2RS1/C3: radial internal clearance greater than Normal

SKF's product data for standard 6209-2RS1 list the radial internal clearance group as Cn, while SKF defines C3 as greater than Normal.

The two variants should therefore not be treated as identical when a machine specifically requires C3 clearance.

SKF 6209-2RS1/C3 vs 6209-2Z/C3

Both bearings can have C3 radial internal clearance, but their closure systems differ.

2RS1 means contact seals on both sides.

2Z means shields on both sides.

SKF lists 6209-2RS1 and 6209-2Z/C3 as separate products with the same 45x85x19 mm boundary dimensions.

The closure design affects operating characteristics, so a shielded 2Z bearing should not automatically be substituted for a sealed 2RS1 bearing.

Selection and Interchangeability

When selecting an equivalent for SKF 6209-2RS1/C3, verify:

• bearing type: single-row deep groove ball bearing
• dimensions: 45x85x19 mm
• bore type: cylindrical
• seals: contact seals on both sides
• SKF seal designation: 2RS1
• radial internal clearance: C3
• required dynamic and static load ratings
• cage construction
• speed requirements
• shaft and housing fits
• operating conditions

A 6209 2RS C3 from another manufacturer may share the same dimensions and nominal clearance class, but this alone does not establish complete technical equivalence.

Technical Specification

Manufacturer: SKF
Technical Designation: 6209-2RS1/C3
Commercial Search Designation: 6209 2RS C3 SKF
Bearing Type: Deep groove ball bearing
Configuration: Single row
Measurement System: Metric
Dimensions: 45x85x19 mm
d - Bore Diameter: 45 mm
D - Outside Diameter: 85 mm
B - Width: 19 mm
Bore Type: Cylindrical
Sealing: Both sides
Seal Type: Contact
SKF Seal Designation: 2RS1
Radial Internal Clearance: C3, greater than Normal
Bearing Material: Bearing steel
Cage Design: Sheet metal
Lubrication: Grease
Basic Dynamic Load Rating C: 35.1 kN
Basic Static Load Rating C0: 21.6 kN
Fatigue Load Limit Pu: 0.915 kN.

FAQ

What are the dimensions of SKF 6209-2RS1/C3?

SKF 6209-2RS1/C3 has a 45 mm bore, 85 mm outside diameter and 19 mm width, giving boundary dimensions of 45x85x19 mm.

What type of bearing is SKF 6209-2RS1/C3?

It is a single-row deep groove ball bearing with a cylindrical bore and contact seals on both sides.

What does 2RS1 mean in SKF 6209?

2RS1 means contact seals on both sides of the bearing. SKF uses RS1/2RS1 for 6200-series contact-sealed bearings from size 6206 upward.

What does C3 mean in SKF 6209?

C3 means radial internal clearance greater than Normal. It is a defined bearing clearance class, not an indication of wear.

What load ratings does SKF 6209 have?

SKF catalogue data specify a basic dynamic load rating C = 35.1 kN and basic static load rating C0 = 21.6 kN for the 6209 size.

Can SKF 6209-2RS1/C3 carry axial loads?

Yes. Deep groove ball bearings can accommodate radial loads and axial loads in both directions.

Is SKF 6209 2RS C3 the same designation as 6209-2RS1/C3?

6209 2RS C3 is a common commercial description. For SKF, the technically precise seal designation for this bearing size is 2RS1, making 6209-2RS1/C3 the preferred technical notation.

Can 6209-2RS1 replace 6209-2RS1/C3?

Not automatically. The standard version does not specify the C3 clearance greater than Normal, which may be required by the bearing arrangement.

AI Overview

SKF 6209-2RS1/C3 is a single-row deep groove ball bearing with dimensions 45x85x19 mm. It has SKF 2RS1 contact seals on both sides and C3 radial internal clearance greater than Normal. The deep groove design accommodates radial loads and axial loads in both directions. SKF catalogue ratings for size 6209 are C = 35.1 kN and C0 = 21.6 kN.