S71924 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71924 CDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
1.01 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
120 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
165 mm
Outside diameter tolerance
-0.004mm to 0
Width
22 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
14.288 mm
Ball quantity
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
17550 lbf
Radial static load rating
20588 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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S71924 CDGA/HCP4A Bearing Product Overview & Core Advantages
The S71924 CDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. This sealed bearing features a universal matchable (SU) design, allowing bearings to be mounted in any combination to achieve various preload levels. Its core advantages include the ability to handle combined loads (radial and axial), superior running accuracy from its P4A tolerance class, and high-speed capability enabled by its ceramic balls and phenolic cage. The compact design and pre-lubrication make it an ideal, long-lasting solution for high-performance systems.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S71924 | Bearing series and size designation (120mm bore, 165mm OD, 22mm width) |
| CD | 15° contact angle, universal matchable design (SU) |
| GA | Preload level: Extra light (Class A) |
| HC | Hybrid ceramic balls (Silicon Nitride) |
| P4A | High precision tolerance class (superior to ABEC 7) |
S71924 CDGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and precision P4A tolerances provide high rigidity, enabling the bearing to support significant combined radial and axial loads (Dynamic: 17,550 lbf, Static: 20,588 lbf).
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic resin cage allows for a high limiting speed of 11,000 rpm, minimizing friction and heat generation.
- Long Service Life & Reliability: As a sealed and pre-lubricated bearing, it is protected from contamination and is maintenance-free within its specified temperature range (-30°C to 110°C). The universal matching capability ensures consistent performance in multi-bearing arrangements.
- Reduced Heat and Wear: Ceramic balls offer superior wear resistance and electrical insulation, reducing the risk of adhesive wear and extending the bearing's operational lifespan.
S71924 CDGA/HCP4A Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for applications requiring high speed, accuracy, and rigidity. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
- Aerospace & Defense: Gyroscopes, radar systems, and auxiliary power units (APUs).
- High-Frequency Motors and Spindles: Where low vibration and high rotational accuracy are critical.
