S71909 ACD/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71909 ACD/P4A
Basic Information
System of measurement
Metric
Weight
0.13 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
45 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
68 mm
Outside diameter tolerance
-0.007mm 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° to 110 °C
Radial dynamic load rating
2790 lbf
Radial static load rating
2025 lbf
Limiting speed
17 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
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:
$ 423.55
/ each
In Stock
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S71909 ACD/P4A Bearing Product Overview & Core Advantages
The S71909 ACD/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. As a single-row bearing, it is optimized to handle significant combined loads (radial and axial) simultaneously. Its defining features include a 25° contact angle for superior axial load capacity and a P4 (ABEC-7) tolerance class, ensuring ultra-precise running accuracy. Pre-loaded and pre-lubricated, this bearing offers high rigidity and is ready for immediate installation in high-speed, high-reliability systems.
S71909 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Indicates a series of high-precision angular contact ball bearings. |
| 1909 | Specifies the bearing size: 45mm bore, 68mm outside diameter, 12mm width. |
| ACD | Signifies a 25° contact angle and that the bearing is supplied with a preload for immediate high-rigidity performance. |
| P4A | Denotes an ultra-high P4 tolerance class (equivalent to ABEC-7), guaranteeing exceptional running precision. |
S71909 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row design with a 25° contact angle and preload provides outstanding system stiffness and minimizes deflection under load, which is critical for precision applications.
- Superior Load Capacity: Engineered to handle combined radial and axial loads efficiently. The optimized internal geometry and high-grade chrome steel construction contribute to its high dynamic and static load ratings.
- Optimized High-Speed Performance: The lightweight phenolic resin cage ensures stability and low friction at high rotational speeds, supporting the bearing's high limiting speed.
- Sealed and Lubricated for Long Life: As a sealed bearing that comes pre-lubricated, it is protected from contamination and is maintenance-free, offering reliable operation throughout its service life within the specified temperature range.
S71909 ACD/P4A Bearing Typical Application Areas
This bearing is ideally suited for high-precision and high-speed machinery, including:
- Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors
- Medical and Dental Equipment
- Robotic Arms and Precision Gearboxes
