305288 DA
Double Row Angular Contact Ball Bearings
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Part No.
Part No.
305288 DA
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Double Row
Weight
9.67 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
180 mm
Bore diameter tolerance
-0.018mm to 0
Outside diameter
250 mm
Outside diameter tolerance
-0.02mm to 0
Width
70 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
2 mm
Distance from side face to load point
216 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
207.45 mm
Outer Ring Dimensions
Shoulder diameter outer ring
234.7 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
42750 lbf
Radial static load rating
64125 lbf
Limiting speed
2.6 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
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305288 DA Bearing Product Overview & Core Advantages
The 305288 DA is a metric double row angular contact ball bearing engineered for applications requiring exceptional precision and reliability. This bearing is specifically designed to simultaneously handle combined radial and axial loads from both directions, making it an ideal solution for complex loading scenarios. Its double row construction provides superior high rigidity and stability compared to single row designs. Manufactured to a P6 (ABEC-3) tolerance class, it ensures precise running accuracy and is pre-lubricated for immediate installation and long-term performance in a wide temperature range from -30°C to 110°C.
305288 DA Bearing Model Code Explained, Specifications & Naming Convention
The model number 305288 DA provides specific technical information:
- 305288: The basic bearing designation, indicating the specific size and internal geometry.
- DA: This suffix denotes the contact angle arrangement. In this configuration, the two rows of balls are arranged to optimally support axial loads in both directions.
305288 DA Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The double row ball design significantly increases the bearing's radial and axial stiffness, enabling it to support substantial combined loads (Radial dynamic: 42,750 lbf, Static: 64,125 lbf).
- Precision Performance: Built to a P6 tolerance class, it guarantees minimal runout and smooth operation, which is critical for high-precision applications.
- Optimized for High-Speed Operation: The standard stainless steel cage ensures low friction and reliable performance at high rotational speeds, with a limiting speed of 2,600 rpm.
- Durability and Corrosion Resistance: The chrome steel rings and balls provide high load capacity and wear resistance, while the stainless steel cage offers excellent corrosion resistance, contributing to a long service life.
305288 DA Bearing Typical Application Areas
This double row angular contact ball bearing is ideally suited for demanding industrial applications, including:
- Machine Tool Spindles
- Gearboxes and Transmission Systems
- Industrial Pumps and Compressors
- Precision Medical and Laboratory Equipment
