71914 ACD/P4ADT
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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71914 ACD/P4ADT Bearing Product Overview & Core Advantages
The 71914 ACD/P4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex tandem (DT) arrangement consists of two matched bearings, preloaded to deliver superior high rigidity and axial load capacity. Manufactured to P4A tolerance class, it ensures minimal runout and vibration, making it ideal for high-speed spindles and other precision machinery. Its compact design and high dynamic load rating allow it to handle significant combined loads efficiently.
71914 ACD/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
- 71914: Denotes the bearing series and size. A 70mm bore, 100mm OD metric bearing.
- A: Signifies a 25° contact angle, optimized for supporting high axial loads.
- C: Indicates a phenolic (polyamide) cage, which contributes to lower friction and higher limiting speeds.
- D: Specifies a duplex tandem (DT) arrangement of two preloaded bearings.
- P4A: Defines the tolerance class, indicating very high precision levels for both dimensional and running accuracy.
71914 ACD/P4ADT Bearing Structural Features & Performance Benefits
The 71914 ACD/P4ADT's performance is derived from its specific construction. The duplex tandem arrangement provides maximum rigidity and unidirectional axial load capacity by stacking two bearings. The 25° contact angle is engineered to effectively handle substantial thrust loads in one direction. The use of a lightweight phenolic cage reduces centrifugal forces, enabling a high limiting speed of 28,000 rpm. Manufactured from chrome steel for both rings and balls, the bearing ensures high durability and long service life under dynamic and static loads. The bearings are supplied pre-lubricated and preloaded, ready for installation in high-precision assemblies.
71914 ACD/P4ADT Bearing Typical Application Areas
- Machine Tool Spindles: For milling, grinding, and turning centers.
- High-Frequency Motors and Precision Spindles.
- Industrial Pumps and Compressors.
- Aerospace and Defense instrumentation.
- Robotic arm joints and precision gearboxes.
