S71911 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71911 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.16 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
80 mm
Outside diameter tolerance
-0.007mm to 0
Width
13 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
23
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
4095 lbf
Radial static load rating
3082 lbf
Limiting speed
17 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 574.58
/ each
In Stock
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S71911 ACD/HCP4A Bearing Product Overview & Core Advantages
The S71911 ACD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. As a single-row bearing with a 25° contact angle, it is optimized to handle combined loads, primarily thrust loads in one direction, while also supporting significant radial loads. Its core advantages include super-high-speed capability enabled by a phenolic cage and ceramic balls, P4 (ABEC-7) precision tolerance for superior running accuracy, and factory-applied lubrication for immediate, reliable operation. This bearing is designed for compact, high-rigidity arrangements where space is limited and performance is critical.
S71911 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S71911 ACD/HCP4A provides detailed technical specifications through its suffixes:
- S: Denotes a bearing from a high-precision series.
- 7: Identifies the bearing type as an Angular Contact Ball Bearing.
- 1911: Specifies the dimensional series; '19' for the series and '11' for a 55mm bore.
- ACD: Indicates a 25° contact angle and a specific internal design optimized for high rigidity and speed.
- HCP4A: A composite suffix where:
- HC: Signifies the cage material is Phenolic (Polyamide), contributing to low weight and high-speed performance.
- P4: Specifies the P4 (ABEC-7) tolerance class, ensuring ultra-precise dimensions and running accuracy.
- A: Indicates internal design and clearance optimizations.
S71911 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed & Low Friction: The combination of ceramic balls and a lightweight phenolic cage significantly reduces centrifugal forces and friction, enabling the bearing to achieve a high limiting speed of 17,000 rpm. This results in lower operating temperatures and extended service life.
- High Rigidity & Load Capacity: The 25° contact angle and robust internal geometry provide high axial and radial stiffness, making it ideal for applications requiring precise shaft positioning. It offers a dynamic load rating of 4095 lbf and a static load rating of 3082 lbf.
- Precision Performance: Manufactured to P4 tolerance class, this bearing guarantees minimal runout and vibration, which is critical for the accuracy of spindles and other precision machinery.
- Pre-lubricated & Sealed: The bearing is factory-lubricated and sealed, protecting it from contamination and providing maintenance-free operation within its specified temperature range of -30° to 110 °C.
S71911 ACD/HCP4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications where speed, precision, and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- Precision Instruments: Measuring devices, optical scanners, and laboratory equipment.
- High-Speed Motors & Drives: Electric spindles, servo motors, and turbochargers.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units (APUs).
