S71914 ACD/P4ADBB
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71914 ACD/P4ADBB
Basic Information
System of measurement
Metric
Weight
0.67 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
32 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
11858 lbf
Radial static load rating
14400 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Grease
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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S71914 ACD/P4ADBB Bearing Product Overview & Core Advantages
The S71914 ACD/P4ADBB is a precision duplex back-to-back angular contact ball bearing designed for demanding applications requiring exceptional rigidity and running accuracy. This matched pair bearing set is pre-loaded to Light / Class B standards, delivering superior system stability and minimal axial/radial runout. Its primary advantage lies in its ability to handle combined loads efficiently, including high radial loads and significant axial loads in both directions simultaneously, making it ideal for high-precision, high-reliability spindles and rotary systems.
S71914 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
The model number S71914 ACD/P4ADBB is decoded as follows:
- S: High-precision bearing series
- 7: Angular contact ball bearing
- 19: Dimension series (specific width and outer diameter relationship)
- 14: Bore diameter code (70 mm)
- ACD: Duplex Back-to-Back (DB) arrangement with a specific contact angle and preload
- P4A: High precision tolerance class (superior to ABEC 7), with enhanced running accuracy requirements
- DBB: Denotes a matched bearing set (2 bearings) supplied as a pair
S71914 ACD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & System Stability: The duplex back-to-back (DB) arrangement creates a rigid bearing system that effectively resists overturning moments, making it exceptionally stable under combined loads.
- Superior Load Capacity: Engineered with a 25° contact angle and high-grade chrome steel components, this bearing offers a high dynamic (11,858 lbf) and static (14,400 lbf) load rating for long service life.
- Optimized High-Speed Performance: The lightweight, durable phenolic resin cage ensures smooth operation and guides the balls effectively, contributing to a high limiting speed of 28,000 rpm.
- Precision & Accuracy: Manufactured to a P4A tolerance class with tight bore and OD tolerances, this bearing guarantees minimal runout and exceptional rotational accuracy for precision machinery.
- Sealed & Lubricated for Life: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is typically maintenance-free within its specified temperature range (-30°C to 110°C).
S71914 ACD/P4ADBB Bearing Typical Application Areas
This high-precision duplex bearing is ideally suited for applications where maximum rigidity and accuracy are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Systems: Industrial robots, indexing tables, and rotary actuators.
- High-Frequency Motors & Spindles: Motors and spindles for PCB drilling and other high-speed automation.
- Medical & Laboratory Equipment: Centrifuges and precision analytical instruments.
