S71901 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71901 CDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.01 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
12 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
24 mm
Outside diameter tolerance
-0.004mm to 0
Width
6 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
13
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
596 lbf
Radial static load rating
281 lbf
Lubrication
Grease
Matched arrangement
Single
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
Ceramic
Cage material
Phenolic
Technical Drawings
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S71901 CDGA/HCP4A Bearing Product Overview & Core Advantages
The S71901 CDGA/HCP4A is a super-precision angular contact ball bearing designed for applications demanding the highest levels of accuracy and performance. As a single bearing that is universally matchable (SU), it can be mounted in pairs to handle combined loads—significant radial and bidirectional axial loads simultaneously. Its compact design, featuring a 12mm bore and 6mm width, offers a high load capacity in a minimal space. Manufactured to the stringent P4A tolerance class and equipped with a phenolic cage and ceramic balls, this bearing is engineered for high-speed operation, exceptional rigidity, and long-term reliability in demanding environments.
S71901 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance & Advantage |
|---|---|---|
| S7 | Bearing Series | Indicates a super-precision, high-speed angular contact ball bearing series. |
| 1901 | Size Code | Denotes the specific bearing dimensions: 12mm bore, 24mm OD, 6mm width. |
| CD | Contact Angle & Preload | Specifies a 15° contact angle and "Extra light" preload (Class A), optimizing it for high-speed, high-precision applications with minimal friction. |
| GA | Cage Type | Designates a phenolic (resin) cage, which is lightweight and ideal for high-speed operation, contributing to lower centrifugal forces and reduced heat generation. |
| HC | Ball Material | Signifies the use of ceramic (Hybrid Ceramic) balls. This provides lower density, reduced friction, and superior performance at very high speeds. |
| P4A | Tolerance Class | Represents an ABEC 7 / ISO P4 precision class with enhanced running accuracy requirements, ensuring minimal vibration and maximum positional accuracy. |
S71901 CDGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The optimized internal geometry and 15° contact angle enable the bearing to support substantial combined loads. Its universal matchable (SU) design allows for precise pairing to create a highly rigid bearing system that resists operational deflection.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls significantly reduces centrifugal forces, allowing for dramatically higher limiting speeds and lower operating temperatures compared to all-steel bearings.
- Precision and Longevity: Manufactured to P4A tolerance class, this bearing guarantees exceptional running accuracy. The sealed design with pre-applied grease lubrication protects against contamination and provides reliable operation within a temperature range of -30°C to 110°C, ensuring long service life with minimal maintenance.
S71901 CDGA/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 CNC milling and grinding machines
- High-frequency Spindles in PCB drilling and routing equipment
- Precision Robotic Arms and joints
- High-speed Dental Handpieces
- Advanced Aerospace instrumentation and control systems
