The RKW 6210 is a metric single-row deep groove ball bearing designed to support rotating shafts with low friction and reliable performance across a broad range of industrial applications.

The 6210 dimensional series is one of the commonly used bearing sizes in machinery because it combines:

• 50 mm shaft bore
• 90 mm housing diameter
• Compact 20 mm width
• Good radial-load capacity
• Moderate axial-load capability in both directions
• Relatively high operating-speed capability
• Broad availability of open, shielded, and sealed configurations

The deep-groove raceway geometry allows the bearing to carry primarily radial loads while also accommodating a degree of axial load in both directions, depending on the exact execution and application conditions.

⚙️ Applications

• Electric motors
• Industrial gearboxes
• Pumps
• Fans and blowers
• Conveyor systems
• Automotive equipment
• Machine tools
• Agricultural machinery
• Mechanical transmissions
• General industrial rotating equipment

🎯 Benefits

✔ Internationally common 6210 metric size

✔ Standard 50 × 90 × 20 mm dimensions

✔ Single-row deep groove construction

✔ Good radial-load capability

✔ Supports moderate axial load in both directions

✔ Suitable for moderate-to-high rotational speed

✔ Available in open, shielded, and sealed configurations

✔ Easy to cross-reference across many manufacturers

✔ Technical support available for replacement selection

🧠 Technical Insight

• RKW 6210 Bearing Reference
• Single-Row Deep Groove Radial Ball Bearing
• Metric 62-Series
• 50 mm Bore
• 90 mm Outside Diameter
• 20 mm Width
• Dynamic Load Reference Approx. 37.1 kN
• Static Load Reference Approx. 23.2 kN

✅ Key Features

• RKW Industrial Bearing
• Model 6210
• Metric-Series Construction
• Deep Groove Raceway
• Single-Row Ball Bearing
• 50x90x20 mm Standard Size
• Multiple Closure Options
• Cross-Reference Support Available

📊 Specifications

Brand: RKW

Model / Bearing Number: 6210

Bearing Series: 62-Series

Bearing Type: Single-Row Deep Groove Radial Ball Bearing

Bore Diameter (d): 50 mm

Outside Diameter (D): 90 mm

Width (B): 20 mm

Approx. Inch Equivalent: 1.969 × 3.543 × 0.787 in

Rolling Elements: Ball

Number of Rows: 1

Raceway Type: Deep Groove

Basic Dynamic Load Rating (C): Approximately 37.1 kN

Basic Static Load Rating (C₀): Approximately 23.2 kN

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

Limiting Speed: Approximately 4,800–8,500 rpm depending on closure type, lubrication, clearance, fit, load, and operating conditions

Open Version: 6210

Shielded Version: 6210-ZZ / 6210-2Z

Sealed Version: 6210-2RS / 6210-2RSH / 6210-2RS1

Open Bearing Lubrication: Suitable for applications using external grease or oil lubrication

Shielded Bearing: Metal shields help retain grease and reduce entry of larger contaminants while allowing relatively high speed

Sealed Bearing: Contact or low-friction elastomer seals provide stronger protection against fine dust, splash, moisture, and contamination, with lower maximum speed than many open or shielded executions

Internal Clearance: Depends on complete suffix; verify Normal, C3, or other required clearance

Cage: Verify actual RKW specification

Temperature Range: Depends on lubricant, seal material, cage, clearance, and operating environment

Shaft Fit: Nominal 50 mm shaft; verify shaft tolerance and interference

Housing Fit: Nominal 90 mm housing bore; verify housing tolerance and shoulder geometry

Installation Consideration: Confirm closure, internal clearance, lubrication, shaft/housing fit, shoulder radius, alignment, and operating speed before installation

Dimensional Standard: International Metric 6210 Deep Groove Ball Bearing Size

🔁 Equivalent

Suitable replacement or cross-reference candidate for compatible:

• RKW 6210
• 6210 Deep Groove Ball Bearing
• 50x90x20 mm Ball Bearing
• 6210 Open Bearing
• 6210-ZZ / 6210-2Z
• 6210-2RS / 6210-2RSH / 6210-2RS1
• 50 mm Bore Industrial Bearing
• 90 mm OD Deep Groove Bearing
• Metric 62-Series Bearing
• Industrial 6210 Replacement Bearing

Important brand and suffix note

The supplied product designation is RKW 6210. It should not automatically be treated as the same product as:

• RKB 6210
• SKF W 6210
• Another manufacturer's 6210

The 6210 basic number primarily identifies the dimensional series, but the complete product specification can still differ by:

• Manufacturer
• Bearing steel
• Stainless-steel execution
• Precision class
• Internal clearance
• Cage
• Grease
• Seal / shield type
• Load rating
• Speed rating

In particular, SKF W 6210 is a separate stainless-steel designation and should not be assumed equivalent to an RKW 6210 unless the complete material and performance specification matches.

(Always verify the complete bearing marking and suffix before ordering a replacement.)

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

🌎 Worldwide Shipping Available

📦 MOQ: 1 Piece

🏭 Suitable for electric motors, pumps, gearboxes, fans, conveyors, automotive applications, machine tools, agricultural machinery, transmissions, and general industrial equipment requiring a 50 × 90 × 20 mm bearing.

📲 Contact via LINE ID: dusitrea

📧 Email: sales@seal4go.com

💬 Technical support available before ordering

🔍 Assistance available for cross-reference and equivalent part identification