S71911 ACE/P4ADGA
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71911 ACE/P4ADGA
Basic Information
System of measurement
Metric
Weight
0.35 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
80 mm
Outside diameter tolerance
-0.004mm to 0
Width
26 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
5355 lbf
Radial static load rating
4500 lbf
Limiting speed
34 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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S71911 ACE/P4ADGA Bearing Product Overview & Core Advantages
The S71911 ACE/P4ADGA is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed capability. As a universally matchable (SU) bearing supplied in a pre-set pair, it delivers outstanding performance in handling combined radial and axial loads. Manufactured to the stringent P4A tolerance class, it features a phenolic cage and comes pre-lubricated with grease, making it ideal for high-reliability, high-precision spindles and machinery where minimal runout and superior rigidity are critical.
S71911 ACE/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| S | Super-precision bearing |
| 7 | Angular contact ball bearing |
| 1911 | Dimension series (19) and bore code (11 → 55 mm) |
| ACE | 25° contact angle and optimized internal design |
| P4A | High-precision tolerance class (superior to ABEC 7) |
| DGA | Universal matchable (SU) pairing designation |
S71911 ACE/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and universal matchable (SU) arrangement of two bearings provide high system rigidity and excellent capacity for combined loads.
- Super-Precision Performance: Manufactured to P4A tolerance class with extremely tight dimensional runouts, ensuring minimal vibration and superior positional accuracy in spindles.
- High-Speed Capability: The lightweight phenolic resin cage and optimized internal geometry contribute to a high limiting speed of 34,000 rpm, reducing centrifugal forces and friction.
- Optimized for Preload: Supplied with an extra light (Class A) preload, making it ready for installation in precision arrangements without additional adjustment, ensuring consistent performance.
- Durable Construction: Components made from chrome steel provide high fatigue life and wear resistance under demanding operating conditions.
S71911 ACE/P4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring extreme precision.
- Precision Instrumentation: Measuring devices, optical scanners, and coordinate measuring machines (CMM).
- High-Frequency Spindles: PCB drilling, engraving, and high-speed routing equipment.
- Medical Equipment: Dental handpieces and small precision medical devices.
- Robotics: High-precision joints and actuators.
