S71914 ACDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71914 ACDGB/HCP4A
Basic Information
System of measurement
Metric
Weight
0.29 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
70 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
100 mm
Outside diameter tolerance
-0.004mm to 0
Width
16 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
24
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
7312 lbf
Radial static load rating
7312 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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S71914 ACDGB/HCP4A Bearing Product Overview & Core Advantages
The S71914 ACDGB/HCP4A is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. As a single bearing that is Universal Matchable (SU), it can be precisely paired with a second, identical bearing to form a preloaded duplex set, offering exceptional rotational accuracy and system stiffness. Its key advantages include the ability to accommodate 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.
S71914 ACDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for a 19mm bore, super-precision angular contact bearing. |
| 1914 | Standardized size code indicating a 70mm bore, 100mm OD, and 16mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| DGB | Back-to-back (DB) mounting arrangement with a Light preload (Class B). |
| HC | Hybrid Ceramic construction, featuring ceramic balls and steel rings. |
| P4A | Indicates a super-precision tolerance class with running accuracy requirements tighter than ABEC 7. |
S71914 ACDGB/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Axial Load Capacity: The 25° contact angle and optimized internal geometry are engineered to support significant axial loads in one direction, while also handling radial loads. When mounted in a back-to-back (DB) pair, the arrangement provides high moment rigidity.
- Superior High-Speed Performance: The combination of lightweight ceramic balls and a phenolic resin cage significantly reduces centrifugal forces and friction, enabling the high limiting speed of 28,000 rpm. This also reduces operating temperature and improves service life.
- Exceptional Running Accuracy: Manufactured to a P4A super-precision tolerance, this bearing ensures minimal runout and vibration, which is critical for applications requiring extreme positional accuracy and smooth operation.
- Sealed and Lubricated for Life: The bearing is sealed and pre-lubricated with grease, protecting it from contamination and providing maintenance-free operation within its specified temperature range of -30°C to 110°C.
S71914 ACDGB/HCP4A Bearing Typical Application Areas
This super-precision bearing is ideally suited for high-performance machinery where speed, accuracy, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotic Drives: Arm joints and high-accuracy rotary actuators.
- High-Frequency Motors and Spindles: PCB drilling spindles and dental handpieces.
- Aerospace and Defense Systems: Gyroscopes, radar platforms, and other precision instrumentation.
