The FAG 6405 Ball Bearing is a single-row deep groove radial ball bearing designed to support rotating shafts while minimizing friction between the shaft and stationary housing.

The 6405 series uses a relatively robust cross-section with a 25 mm bore, 80 mm outside diameter, and 21 mm width. Compared with lighter bearing series with the same bore, the larger outside diameter and section can provide greater load-carrying capability depending on the exact manufacturer execution.

Nominal dimensions:

Bore Diameter: 25 mm

Outside Diameter: 80 mm

Bearing Width: 21 mm

Approximate inch dimensions:

Bore: 0.984 in

Outside Diameter: 3.150 in

Width: 0.827 in

Deep groove ball bearings primarily support radial loads and can also carry moderate axial loads in both directions under suitable operating conditions.

Because the supplied designation is simply 6405, the bearing should not automatically be assumed to be open, sealed, shielded, C3 clearance, or any other special execution. If the original bearing includes a suffix, that full designation should be retained when selecting a replacement.

Before replacement, verify:

• Complete FAG bearing designation
• Seal or shield arrangement
• Internal clearance
• Cage construction
• Lubrication method
• Radial and axial load requirements
• Shaft fit
• Housing fit
• Rotational speed
• Operating temperature

⚙️ Applications

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

🎯 Benefits

✔ Heavy-series deep groove ball bearing

✔ Strong radial-load capability

✔ Moderate axial-load capability in both directions

✔ Suitable for 25 mm shaft applications

✔ Low-friction rolling-element design

✔ Robust 80 mm outside diameter

✔ Suitable for demanding industrial machinery

✔ Useful for maintenance and overhaul work

✔ Easy to cross-reference within the 6405 series

🧠 Technical Insight

• FAG 6405 Bearing Series
• Single-Row Deep Groove Ball Bearing
• 25 mm Bore Diameter
• 80 mm Outside Diameter
• 21 mm Width
• Heavy-Series Bearing Cross-Section
• Supports Radial and Moderate Axial Loads
• Exact Closure and Clearance Must Be Verified

✅ Key Features

• FAG Industrial Bearing
• 6405 Reference
• Single-Row Construction
• Deep Groove Raceway
• Metric 25x80x21 mm Dimensions
• Heavy-Series Ball Bearing
• OEM Replacement Candidate
• Cross-Reference Support Available

📊 Specifications

Brand: FAG

Model / Bearing Number: 6405

Bearing Series: 6405

Bearing Type: Single-Row Deep Groove Ball Bearing

Bore Diameter (d): 25 mm

Outside Diameter (D): 80 mm

Width (B): 21 mm

Inch Equivalent: Approximately 0.984 × 3.150 × 0.827 in

Rolling Elements: Ball

Number of Rows: 1

Raceway Type: Deep Groove

Bearing Series Class: Heavy / robust 64-series deep groove bearing

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

Seal / Shield: Not indicated by the supplied 6405 designation; verify actual FAG bearing

Cage: Verify the complete FAG specification if cage material is critical

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

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

Speed Rating: Depends on bearing execution, lubrication, load, fit, temperature, and operating conditions

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

Shaft Fit: Select according to shaft rotation, bearing load, and manufacturer recommendations

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

Standard: Metric 6405-Series Deep Groove Ball Bearing

🔁 Equivalent

Suitable replacement or cross-reference candidate for compatible:

• FAG 6405
• 6405 Deep Groove Ball Bearing
• 25x80x21 Ball Bearing
• 25 mm Bore Ball Bearing
• SKF 6405 Series
• NSK 6405 Series
• NTN 6405 Series
• KOYO 6405 Series
• TIMKEN 6405 Series
• Industrial 6405 Bearing

The basic 6405 designation and 25 × 80 × 21 mm dimensions provide a strong dimensional cross-reference, but dimensional similarity alone does not guarantee full interchangeability.

A replacement should also match the required seal/shield configuration, internal clearance, cage, lubrication, precision class, load rating, speed capability, shaft fit, housing fit, and operating environment.

For example, 6405, 6405-2Z, 6405-2RS, and 6405-C3 may share the same nominal dimensions but differ in closure and internal operating characteristics.

(Always verify the complete FAG 6405 designation and original machine requirements before ordering an equivalent bearing.)

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

🌎 Worldwide Shipping Available

📦 MOQ: 1 Piece

🏭 Suitable for industrial gearboxes, motors, pumps, fans, conveyors, transmission systems, agricultural machinery, machine tools, and demanding 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