71909 ACD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71909 ACD/P4ADGA
Basic Information
System of measurement
Metric
Weight
0.26 kg
Tolerance class
P4A
Seal type
Open
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
24 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
4478 lbf
Radial static load rating
4050 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
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
Price:
$ 201.64
/ each
In Stock
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71909 ACD/P4ADGA Bearing Product Overview & Core Advantages
The 71909 ACD/P4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. Engineered to the stringent P4A tolerance class, this bearing excels at simultaneously handling combined radial and axial loads. Its universal matchable (SU) design allows for flexible mounting in duplex pairs to achieve optimized preload and stiffness. The combination of a phenolic cage and superior lubrication enables outstanding high-speed performance, making it an ideal solution for high-rigidity, precision spindle systems.
71909 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle |
| P4A | High precision tolerance class with enhanced running accuracy |
| DGA | Universal Matchable (SU) arrangement designation |
71909 ACD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design with a 25° contact angle provides excellent resistance to combined loads. The universal matchable (SU) feature enables precise preload control when mounted in pairs, significantly enhancing system stiffness.
- Superior High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the optimized lubrication facilitates a limiting speed of 41,000 rpm, ensuring stable operation at high rotational velocities.
- Exceptional Precision: Manufactured to P4A tolerance class with tight dimensional controls on the bore diameter (45 mm), outside diameter (68 mm), and width (24 mm), guaranteeing minimal runout and vibration.
- Premium Material Construction: Components made from chrome steel for both rings and balls ensure high durability, fatigue resistance, and a long operational lifespan under demanding conditions.
71909 ACD/P4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers
- High-Speed Machining Centers: Applications requiring extreme rotational accuracy and rigidity
- Precision Instrumentation: Coordinate measuring machines and optical positioning systems
- Robotic Drives: High-accuracy rotary joints and servo motor applications
