S71920 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71920 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.68 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
100 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
140 mm
Outside diameter tolerance
-0.009mm to 0
Width
20 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
26
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
12870 lbf
Radial static load rating
14175 lbf
Limiting speed
9.5 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:
$ 1576.75
/ each
In Stock
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S71920 ACD/HCP4A Bearing Product Overview & Core Advantages
The S71920 ACD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single-row bearing is designed to accommodate combined loads, handling significant radial and one-direction axial loads simultaneously. Its P4 (ABEC-7) tolerance class ensures ultra-precise running accuracy, while the ceramic ball and phenolic cage construction contribute to superior high-speed capability and reduced weight. Preloaded and lubricated from the factory, it offers high rigidity and is ready for immediate installation in high-reliability systems.
S71920 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S71920 ACD/HCP4A provides detailed technical specifications through its suffixes:
- S7: Denotes a series of high-precision angular contact ball bearings.
- 1920: Standard size designation (Bore: 100mm, OD: 140mm, Width: 20mm).
- ACD: Signifies a 25° contact angle and a specific internal design optimized for high rigidity and speed.
- HCP4A: A compound suffix indicating:
- HC: The cage material is Phenolic, offering lightweight and high-speed performance.
- P4A: Specifies the tolerance class P4 (ABEC-7) with enhanced running accuracy requirements.
S71920 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The 25° contact angle and P4 tolerance class provide stable, precise shaft positioning, which is critical for applications like machine tool spindles.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a high limiting speed of 9,500 rpm.
- Excellent Load Capacity: Engineered to support high dynamic and static load ratings (12,870 lbf and 14,175 lbf respectively), making it suitable for combined load conditions.
- Preload & Sealing: Supplied as a preloaded and lubricated unit, ensuring immediate high stiffness and operational readiness. The sealed design protects against contamination.
- Wide Temperature Range: Operates effectively within a temperature range of -30°C to 110°C.
S71920 ACD/HCP4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery where precision, speed, and reliability are paramount. Key applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Robotics: In robotic arm joints and high-accuracy actuators.
- High-Frequency Motors and Spindles: Used in electric motors and spindles for PCB drilling and other high-RPM operations.
- Medical and Laboratory Equipment: In centrifuges and other precision instruments.
- Aerospace Actuation Systems: Where high reliability and performance in a compact envelope are required.
