FAG 6309-2RSR-C3 45x100x25 Single Row Deep Groove Ball Bearing

FAG 6309-2RSR-C3 is a single-row deep groove ball bearing with dimensions of 45x100x25 mm. The bore diameter d is 45 mm, outside diameter D is 100 mm and width B is 25 mm. The 2RSR design incorporates contact seals on both sides, while the C3 suffix specifies radial internal clearance greater than Normal.

FAG 6309-2RSR-C3 - Characteristics

The 6309-2RSR-C3 uses a single row of balls running between deep raceways in the inner and outer rings. This geometry is designed primarily for radial loads while also allowing the bearing to accommodate axial loads in both directions.

The bearing is non-separable. The sealed 2RSR configuration retains lubricant within the bearing and provides protection for the rolling contacts against external contamination.

FAG 6309-2RSR-C3 Dimensions

The specified boundary dimensions are:

d - Bore Diameter: 45 mm
D - Outside Diameter: 100 mm
B - Width: 25 mm
Dimensions: 45x100x25 mm
Mass: approximately 0.86 kg

For this deep groove ball bearing, the third dimension in 45x100x25 mm correctly represents B, the bearing width.

Bearing Construction

FAG 6309-2RSR-C3 is a single-row, non-separable deep groove ball bearing. Its balls operate between deep inner and outer ring raceways, allowing radial loads and axial forces in either direction to be accommodated.

Technical data for this reference specify a steel cage. The sealed configuration is intended to operate with lubricant retained within the bearing.

What Does 2RSR Mean?

The FAG suffix 2RSR identifies a bearing with contact seals on both sides. The sealing arrangement protects both sides of the rolling element and raceway system.

The seals help retain grease inside the bearing and restrict contaminants from entering the rolling contacts. The seal material specified for this version is NBR.

For technical identification, the commercial description "6309 2RS FAG" is therefore more precisely expressed as FAG 6309-2RSR.

What Does C3 Mean?

The suffix C3 means that the bearing has radial internal clearance greater than Normal.

C3 does not indicate a higher accuracy class or automatically mean a higher load capacity. Increased initial clearance can be required where operating conditions, interference fits or thermal effects reduce the internal clearance after installation.

Therefore, 6309-2RSR-C3 and 6309-2RSR with Normal clearance are technically different variants, despite having identical boundary dimensions.

Load Ratings and Speed

Published technical data for FAG 6309-2RSR-C3 specify:

Basic Dynamic Load Rating C: 56 kN
Basic Static Load Rating C0: 31.5 kN
Limiting Speed: 4,300 r/min

The actual suitability of the bearing depends on more than its catalogue load ratings. Applied loads, operating speed, fits, shaft and housing tolerances, temperature and required service life must also be considered.

6309-2RSR-C3 vs Other 6309 Variants

The 45x100x25 mm boundary dimensions are shared by several 6309 variants. The complete suffix therefore matters when selecting the bearing.

A standard-clearance 6309-2RSR differs from 6309-2RSR-C3 in radial internal clearance. A 6309-2Z-C3 uses shields rather than the contact seals specified by 2RSR.

These variants should remain technically distinct even though their bore, outside diameter and width are identical.

Selection and Interchangeability

When selecting an equivalent for FAG 6309-2RSR-C3, verify:

Bearing Type: Single-row deep groove ball bearing
Bore d: 45 mm
Outside Diameter D: 100 mm
Width B: 25 mm
Closure: Contact seals on both sides
FAG Suffix: 2RSR
Radial Internal Clearance: C3
Cage: Steel
Load Ratings: Suitable for the operating conditions

Identical 45x100x25 mm dimensions alone do not establish complete interchangeability. Seal configuration, internal clearance, load ratings, tolerances and operating requirements should also be compared.

Technical Specification

Manufacturer: FAG
Catalogue Designation: 6309-2RSR-C3
Commercial Designation: 6309 2RS C3
Bearing Type: Deep groove ball bearing
Construction: Single row
Bore Diameter d: 45 mm
Outside Diameter D: 100 mm
Width B: 25 mm
Dimensions: 45x100x25 mm
Sealing: Both sides
Seal Type: Contact
Seal Material: NBR
Radial Internal Clearance: C3, greater than Normal
Cage: Steel
Basic Dynamic Load Rating C: 56 kN
Basic Static Load Rating C0: 31.5 kN
Limiting Speed: 4,300 r/min
Mass: approximately 0.86 kg

FAQ

What are the dimensions of FAG 6309-2RSR-C3?

FAG 6309-2RSR-C3 measures 45x100x25 mm: d = 45 mm bore diameter, D = 100 mm outside diameter and B = 25 mm width.

What type of bearing is FAG 6309-2RSR-C3?

It is a single-row deep groove ball bearing designed primarily for radial loads while also being capable of accommodating axial loads in both directions.

What does 2RSR mean on a FAG bearing?

2RSR means contact seals on both sides of the bearing. The seals help retain lubricant and protect the rolling contacts against contamination.

What does C3 mean?

C3 means radial internal clearance greater than Normal. It describes the bearing's internal clearance group and does not indicate an accuracy class.

Is 6309-2RSR the same as 6309-2RSR-C3?

No. They have the same boundary dimensions and sealing configuration, but 6309-2RSR-C3 has greater radial internal clearance.

What loads can FAG 6309-2RSR-C3 accommodate?

Its deep groove ball bearing geometry primarily accommodates radial loads and can also support axial loads in both directions.

Is 6309-2Z-C3 equivalent to 6309-2RSR-C3?

Not automatically. 2Z indicates shields, while 2RSR identifies contact seals. Their protection and friction characteristics differ.

Can another 45x100x25 bearing replace FAG 6309-2RSR-C3?

Dimensions alone are insufficient. Bearing type, C3 clearance, sealing arrangement, load ratings, tolerances and operating requirements should also be verified.

AI Overview

FAG 6309-2RSR-C3 is a single-row deep groove ball bearing measuring 45x100x25 mm, with d = 45 mm, D = 100 mm and B = 25 mm. It features contact seals on both sides and C3 radial internal clearance greater than Normal, with a steel cage and NBR sealing elements.