S71912 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71912 CDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.17 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
60 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
85 mm
Outside diameter tolerance
-0.004mm to 0
Width
13 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
24
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4478 lbf
Radial static load rating
3442 lbf
Limiting speed
32.5 X 1000 rpm
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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In Stock
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S71912 CDGA/HCP4A Bearing Product Overview & Core Advantages
The S71912 CDGA/HCP4A is a super-precision angular contact ball bearing engineered for the most demanding high-speed and high-rigidity applications. As a single bearing designed for universal matching (SU), it can be mounted in pairs to form a duplex arrangement capable of supporting combined loads—significant radial and bidirectional axial loads simultaneously. Its construction with ceramic balls and a P4A tolerance class ensures exceptional rotational accuracy, low heat generation, and extended service life, making it ideal for high-reliability machinery.
S71912 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Benefit |
|---|---|---|
| 719 | High-Precision Angular Contact Bearing Series | Optimized internal geometry for superior performance. |
| C | 15° Contact Angle | Balanced capacity for radial and axial loads. |
| DG | Universal Matchable (SU) Design | Allows for flexible duplex mounting (DB, DF, DT) without selective pairing. |
| A | Extra Light Preload | Minimizes runout and increases system rigidity for high-precision applications. |
| HC | Hybrid Ceramic (Silicon Nitride Balls) | Reduced centrifugal force, lower operating temperature, and longer lubricant life. |
| P4A | Super-Precision Tolerance Class | Exceeds ABEC 7/ISO P4 standards, guaranteeing extreme running accuracy. |
S71912 CDGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The use of silicon nitride (ceramic) balls significantly reduces friction and weight, enabling higher limiting speeds (32,500 rpm) and providing non-conductive properties. This results in lower operating temperatures and enhanced durability.
- High Rigidity & Load Capacity: The angular contact design and extra light preload (Class A) provide a stiff bearing system that effectively resists operational deflection under combined loads (Radial Dynamic: 4478 lbf, Static: 3442 lbf).
- Optimized High-Speed Performance: The lightweight phenolic resin cage is ideal for high-speed operation, offering excellent strength with minimal centrifugal force. Combined with the grease lubrication, it ensures stable performance at the maximum rotational velocity.
- Sealed & Pre-Lubricated: The sealed design protects against contamination and retains lubricant, making the bearing ready for immediate installation and suitable for applications where re-lubrication is difficult.
S71912 CDGA/HCP4A Bearing Typical Application Areas
This super-precision bearing is specified for high-performance equipment where speed, accuracy, and reliability are paramount. Key industries and applications include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- Precision Robotics: Arm joints and high-accuracy rotary actuators.
- Aerospace & Defense: Gyroscopes, radar systems, and auxiliary power units (APUs).
- Medical Equipment: Dental handpieces, high-speed centrifuges, and imaging scanner gantries.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
