S71909 ACDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71909 ACDGA/P4A
Basic Information
System of measurement
Metric
Weight
0.13 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
45 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
68 mm
Outside diameter tolerance
-0.004mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2790 lbf
Radial static load rating
2025 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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S71909 ACDGA/P4A Bearing Product Overview & Core Advantages
The S71909 ACDGA/P4A is a super-precision double row angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Engineered to a P4A tolerance class, it excels in handling combined radial and axial loads simultaneously. Its compact design, featuring a phenolic cage and preloaded configuration, makes it an ideal solution for high-speed spindles and other precision machinery requiring superior running accuracy and high operational reliability.
S71909 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S71909 ACDGA/P4A is decoded as follows:
- S: Super-precision bearing series
- 7: Angular contact bearing type
- 1909: Dimension series (19: width series, 09: bore diameter code for 45mm)
- AC: 25-degree contact angle
- D: Double row design
- GA: Preload grade (Extra light / Class A)
- /P4A: High precision tolerance class exceeding ABEC 7
S71909 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides superior radial and axial rigidity, enabling the bearing to support significant combined loads from multiple directions. The 25-degree contact angle is optimized for axial load carrying capacity.
- Super-Precision Performance: Manufactured to P4A tolerance class with extremely tight dimensional tolerances on bore, outside diameter, and width, ensuring minimal runout and vibration for ultra-precise applications.
- High-Speed Capability: The lightweight phenolic resin cage and optimized internal geometry contribute to lower friction and a high limiting speed of 41,000 rpm, making it suitable for demanding high-speed operations.
- Universal Matching & Preload: Designated as Universal Matchable (SU), these bearings can be supplied in sets of four (Number of bearings in matched set: 4) for simplified mounting in preloaded arrangements, ensuring optimal stiffness and system performance.
S71909 ACDGA/P4A Bearing Typical Application Areas
This high-precision bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instruments: Measuring devices and optical equipment.
- High-Frequency Spindles: PCB drilling and routing machines.
- Robotics: High-accuracy robotic arm joints and actuators.
