The SKF 6309 Ball Bearing is designed to support rotating shafts while reducing friction between the shaft and stationary housing.

The 6309 series is a single-row deep groove ball bearing. This bearing type is primarily intended for radial loading but can also support moderate axial loads in both directions under suitable operating conditions.

Nominal dimensions:

Bore Diameter: 45 mm

Outside Diameter: 100 mm

Bearing Width: 25 mm

Approximate inch dimensions:

Bore: 1.772 in

Outside Diameter: 3.937 in

Width: 0.984 in

Because the supplied reference is simply 6309, the bearing should not be assumed to be open, shielded, sealed, C3 clearance, or any other special execution. The complete original suffix should be checked before ordering a substitute.

For replacement work, verify:

• Full bearing designation
• Seal or shield arrangement
• Internal clearance
• Cage type
• Lubrication
• Radial and axial load requirements
• Shaft and housing fits
• Operating speed
• Operating temperature
• Precision requirement

⚙️ Applications

• Electric motors
• Industrial pumps
• Industrial gearboxes
• Fans and blowers
• Conveyor systems
• Agricultural machinery
• Mechanical transmissions
• Machine tools
• Industrial drive systems
• OEM rotating equipment

🎯 Benefits

✔ Standard 6309 bearing dimensions

✔ Efficient radial-load support

✔ Moderate axial-load capability in both directions

✔ Low-friction rolling-element design

✔ Suitable for 45 mm shaft assemblies

✔ Widely used in industrial machinery

✔ Easy to cross-reference within the 6309 series

✔ Suitable for maintenance and overhaul work

✔ Strong replacement availability across major bearing brands

🧠 Technical Insight

• SKF 6309 Bearing Series
• Single-Row Deep Groove Ball Bearing
• 45 mm Bore Diameter
• 100 mm Outside Diameter
• 25 mm Width
• Supports Radial and Moderate Axial Loads
• Exact Clearance and Closure Type Must Be Verified
• Full Suffix Should Be Preserved for Replacement

✅ Key Features

• SKF Bearing
• 6309 Reference
• Deep Groove Ball Bearing
• Single-Row Construction
• Metric 45x100x25 mm Dimensions
• Industrial Rotary Support
• OEM Replacement Candidate
• Cross-Reference Support Available

📊 Specifications

Brand: SKF

Model / Bearing Number: 6309

Bearing Series: 6309

Bearing Type: Single-Row Deep Groove Ball Bearing

Bore Diameter (d): 45 mm

Outside Diameter (D): 100 mm

Width (B): 25 mm

Inch Equivalent: Approximately 1.772 × 3.937 × 0.984 in

Rolling Elements: Ball

Number of Rows: 1

Raceway Type: Deep Groove

Load Capability: Primarily radial load with moderate axial-load capability in both directions

Seal / Shield: Not indicated by the supplied 6309 designation; verify actual SKF bearing

Cage: Verify the complete SKF suffix and bearing specification

Internal Clearance: Do not assume Normal or C3; verify the complete designation

Lubrication: Depends on whether the bearing is open, shielded, sealed, or externally lubricated

Speed Rating: Depends on closure type, lubrication, load, fit, temperature, and specific SKF execution

Temperature Range: Depends on lubricant, cage, seals if fitted, and operating conditions

Shaft Fit: Select according to shaft rotation, load direction, and operating conditions

Housing Fit: Select according to load, housing material, temperature, and application

Standard: Metric 6309-Series Deep Groove Ball Bearing

🔁 Equivalent

Suitable replacement or cross-reference candidate for compatible:

• SKF 6309
• 6309 Deep Groove Ball Bearing
• 45x100x25 Ball Bearing
• 45 mm Bore Ball Bearing
• FAG 6309 Series
• NSK 6309 Series
• NTN 6309 Series
• KOYO 6309 Series
• TIMKEN 6309 Series
• Industrial 6309 Bearing

The basic 6309 designation and 45 × 100 × 25 mm dimensions provide a strong dimensional cross-reference, but the replacement must also match the required seal/shield configuration, internal clearance, cage, lubrication, precision class, load rating, speed capability, and operating environment.

For example, 6309, 6309-2Z, 6309-2RS1, and 6309/C3 may share the same nominal dimensions but differ significantly in closure and internal operating characteristics.

(Always verify the complete SKF 6309 bearing designation and original application requirements before ordering a substitute.)

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

🌎 Worldwide Shipping Available

📦 MOQ: 1 Piece

🏭 Suitable for electric motors, pumps, gearboxes, fans, conveyors, agricultural machinery, machine tools, transmission systems, and general industrial rotating equipment.

📲 Contact via LINE ID: dusitrea

📧 Email: sales@seal4go.com

💬 Technical support available before ordering

🔍 Assistance available for cross-reference and equivalent part identification