71914 ACD/P4ADBG29
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71914 ACD/P4ADBG29
Basic Information
System of measurement
Metric
Weight
0.66 kg
Tolerance class
P4A
Seal type
Open
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
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
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71914 ACD/P4ADBG29 Bearing Product Overview & Core Advantages
The 71914 ACD/P4ADBG29 is a super-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. This duplex back-to-back (DB) matched set is preloaded, enabling it to handle significant combined loads (radial and axial) simultaneously while providing high running accuracy and system stiffness. Manufactured to the exacting P4A tolerance class, it is an ideal solution for high-speed spindles and other precision machinery where minimal runout and maximum stability are critical.
71914 ACD/P4ADBG29 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71914 | Basic bearing series and size designation (70mm bore, 100mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates a duplex (two-bearing) configuration. |
| P4A | Denotes a super-precision tolerance class, exceeding ABEC 7/ISO P4 standards, with enhanced running accuracy. |
| DB | Specifies the Back-to-Back mounting arrangement, which provides high moment rigidity. |
| G29 | Indicates a specific preload level applied to the matched set. |
71914 ACD/P4ADBG29 Bearing Structural Features & Performance Benefits
- High Rigidity & System Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring exceptional positional accuracy.
- Superior Load Capacity: The 25° contact angle and duplex design enable the bearing to carry substantial combined radial and axial loads from both directions.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel components contribute to smooth operation and a high limiting speed of 28,000 rpm.
- Precision Engineering: Compliance with the P4A tolerance class guarantees extremely tight dimensional and running accuracy, resulting in reduced vibration and enhanced machine tool finish.
- Preloaded & Ready-to-Mount: The set is supplied preloaded, simplifying installation and ensuring immediate, optimal performance without the need for on-site adjustment.
71914 ACD/P4ADBG29 Bearing Typical Application Areas
This high-precision bearing is engineered for advanced machinery where accuracy and speed are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines and engraving equipment.
- High-Frequency Motors: Spindles for integrally mounted motor applications.
- Medical Equipment: High-speed rotors in dental handpieces and centrifuges.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and other precision instrumentation.
