305263 D
Double Row Angular Contact Ball Bearings
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Part No.
Part No.
305263 D
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Double Row
Weight
16.4 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
200 mm
Bore diameter tolerance
-0.022mm to 0
Outside diameter
289.5 mm
Outside diameter tolerance
-0.025mm to 0
Width
76 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
2.1 mm
Distance from side face to load point
191 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
231.1 mm
Outer Ring Dimensions
Shoulder diameter outer ring
266 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
67950 lbf
Radial static load rating
106875 lbf
Limiting speed
2.2 X 1000 rpm
Lubrication
Lubricated
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
Price available upon request.
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305263 D Bearing Product Overview & Core Advantages
The 305263 D is a double row angular contact ball bearing designed for applications requiring high precision and rigidity. This metric bearing features an open design and is manufactured to P6 (ABEC-3) tolerance class, ensuring exceptional running accuracy. Its primary advantage lies in its ability to accommodate combined loads—simultaneously handling significant radial loads and axial loads from both directions. The optimized internal geometry and double row construction provide superior stiffness and stability, making it an ideal choice for high-performance machinery where precise shaft positioning is critical.
305263 D Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| D | Indicates a double row angular contact ball bearing construction. |
| Open | No seals or shields, allowing for higher speeds and custom lubrication schemes. |
305263 D Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides a large contact angle, resulting in exceptional stiffness and the ability to support heavy combined radial and axial loads.
- Precision Performance: Manufactured to a P6 tolerance class, this bearing ensures minimal runout and vibration for smooth, precise operation in demanding applications.
- Optimized for Speed: The stainless steel cage ensures reliable performance at the specified limiting speed of 2,200 rpm, providing stability and reduced friction.
- Robust Material Construction: Components made from chrome steel offer high load ratings and durability, while the stainless steel cage provides corrosion resistance.
- Pre-lubricated: Comes with initial lubrication suitable for a wide temperature range of -30°C to 110°C, ensuring immediate operational readiness.
305263 D Bearing Typical Application Areas
This bearing is engineered for high-demand sectors, including:
- Machine Tool Spindles
- Industrial Gearboxes
- Pumps and Compressors
- Precision Industrial Machinery
- Heavy-duty applications requiring high rigidity and precise shaft guidance.
