S71909 ACE/P4ADGA
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71909 ACE/P4ADGA
Basic Information
System of measurement
Metric
Weight
0.25 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
24 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3578 lbf
Radial static load rating
2902 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Grease
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
In Stock
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S71909 ACE/P4ADGA Bearing Product Overview & Core Advantages
The S71909 ACE/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. As a double row angular contact ball bearing, it excels at simultaneously handling combined radial and bidirectional axial loads. Its compact design, featuring a universal matchable (SU) configuration and P4A super-precision tolerance, ensures high running accuracy, high rigidity, and stable performance in high-speed operations. The pre-lubricated and sealed construction offers long-term, maintenance-free service.
S71909 ACE/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number S71909 ACE/P4ADGA provides detailed technical specifications through its suffixes:
- S7: High-precision bearing series.
- 1909: Standard size designation (45mm bore, 68mm OD, 24mm width).
- ACE: Contact angle of 25° and specific internal design.
- P4A: Denotes a super-precision tolerance class exceeding ABEC 7, ensuring extremely tight dimensional and running accuracy.
- DGA: Indicates the bearing is sealed on both sides and pre-lubricated with grease.
S71909 ACE/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design and 25° contact angle provide superior rigidity and enable the bearing to support significant combined loads (radial and axial loads from both directions) effectively.
- High-Speed Performance: The lightweight, robust phenolic resin cage and optimized internal geometry contribute to low friction and high limiting speed (41,000 rpm), making it an excellent high-speed bearing.
- Precision & Accuracy: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for precision applications.
- Maintenance-Free Operation: The integral seals and factory-applied grease lubrication protect against contamination and provide long-lasting performance without the need for re-lubrication within the specified temperature range (-30°C to 110°C).
S71909 ACE/P4ADGA Bearing Typical Application Areas
This high-performance double row angular contact ball bearing is ideally suited for:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Medical and Dental Equipment
- Robotic Arms and Precision Gearboxes
