S71910 ACDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71910 ACDGB/HCP4A
Basic Information
System of measurement
Metric
Weight
0.12 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.004mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
25
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2858 lbf
Radial static load rating
2205 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
3
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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In Stock
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S71910 ACDGB/HCP4A Bearing Product Overview & Core Advantages
The S71910 ACDGB/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This single bearing features a 25° contact angle and is manufactured to P4A super-precision tolerance standards, ensuring minimal runout and superior rotational accuracy. Its core advantages include the ability to handle combined loads (radial and axial) efficiently, excellent high-speed capabilities with a limiting speed of 34,000 rpm, and high rigidity due to its optimized internal geometry. The use of ceramic balls and a phenolic cage further enhances its performance in high-speed and thermally challenging environments.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S71910 | Basic bearing series, indicating a metric, super-precision angular contact ball bearing. |
| AC | Angular Contact design with a 25° contact angle. |
| DGB | Duplex arrangement, Back-to-Back. This configuration provides high moment rigidity. |
| HC | Hybrid Ceramic: Indicates the use of ceramic balls, which reduce friction, heat generation, and allow for higher speeds. |
| P4A | Tolerance class, denoting super-precision running accuracy (superior to ABEC 7). |
S71910 ACDGB/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The back-to-back (DGB) duplex design and a 25° contact angle provide excellent resistance to moment loads and high combined load capacity, making it ideal for applications requiring stable and precise shaft positioning.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic resin cage significantly lowers friction and inertia, enabling the bearing to achieve its high limiting speed of 34,000 rpm with minimal heat generation.
- Precision and Longevity: Manufactured to P4A tolerance class, this bearing ensures extremely low vibration and noise levels. The sealed construction with grease lubrication protects against contamination and provides long-term, maintenance-free operation within the specified temperature range of -30°C to 110°C.
- Universal Matching: Designated as Universal Matchable (SU), this bearing can be universally matched with other bearings of the same type in sets (this set contains 3 bearings) to achieve specific preload or tolerance requirements without selective mounting.
S71910 ACDGB/HCP4A Bearing Typical Application Areas
This high-performance bearing is ideally suited for precision machinery and high-speed equipment, including:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Robotics and Automation Arms
- High-Frequency Motors and Spindles
- Medical and Dental Equipment (e.g., high-speed handpieces)
- Aerospace Instrumentation and Gyroscopes
