S71920 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71920 CDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.68 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
100 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
140 mm
Outside diameter tolerance
-0.004mm to 0
Width
20 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
13612 lbf
Radial static load rating
14738 lbf
Limiting speed
16.25 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
3
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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S71920 CDGA/HCP4A Bearing Product Overview & Core Advantages
The S71920 CDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This sealed bearing features a single universal matchable design with an extra light preload (Class A), making it ideal for spindle systems requiring high rigidity and minimal runout. Its ability to handle combined loads (radial and axial) efficiently, combined with its compact cross-section, positions it as a superior solution for high-speed, high-reliability machinery.
S71920 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| S7 | Bearing series, indicating a high-precision, high-speed angular contact design. |
| 1920 | Size code: 19 for a 95mm bore, 20 for a 140mm outside diameter, and 20mm width. |
| C | 15° contact angle, optimized for high-speed applications with significant axial loads. |
| DG | Universal Matchable (SU) bearing. Two bearings can be mounted in a back-to-back (DB) or face-to-face (DF) arrangement to adjust preload and rigidity. |
| A | Extra light preload class. |
| HCP4A | Combined code for phenolic cage (HC) and P4A tolerance class, denoting extremely high running accuracy and dimensional stability. |
S71920 CDGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: Manufactured to P4A tolerance class with an extra light preload, this bearing provides superior rotational accuracy and stiffness, essential for minimizing deflection in precision spindles.
- Enhanced Speed Capability: The lightweight phenolic resin cage (HC) and ceramic balls reduce centrifugal forces, enabling a high limiting speed of 16,250 rpm. The 15° contact angle is optimized for these high-speed conditions.
- Superior Load Capacity: With a dynamic load rating of 13,612 lbf and a static load rating of 14,738 lbf, the bearing is engineered to handle significant combined radial and axial loads.
- Long-Term Reliability: The sealed design with pre-applied grease lubrication protects against contamination and provides maintenance-free operation within a temperature range of -30°C to 110°C.
S71920 CDGA/HCP4A Bearing Typical Application Areas
This bearing is specifically engineered for high-performance applications, including:
- Machine Tool Spindles (CNC machining centers, grinding spindles)
- High-Speed Motors and Precision Drives
- Robotics and Automation equipment
- Aerospace auxiliary systems
- Medical and Dental equipment spindles
