71907 ACD/P4ADGC
71900 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
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71907 ACD/P4ADGC Bearing Product Overview & Core Advantages
The 71907 ACD/P4ADGC is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. Engineered to a P4A tolerance class, this bearing is optimized to handle combined loads—simultaneous radial and axial loads—with high reliability. Its universal matchable (SU) design allows for flexible mounting arrangements, while the moderate preload (Class C) ensures optimal stiffness and rotational accuracy right from installation. This makes it an ideal choice for high-speed spindles and other precision machinery where performance is critical.
71907 ACD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing series and size designation (35mm bore, 55mm OD, 20mm width). |
| AC | Angular Contact design with a 25° contact angle for superior axial load capacity. |
| D | Signifies a high ball count and optimized internal geometry for increased load rating. |
| P4A | Indicates an ultra-precision tolerance class, exceeding ABEC 7/ISO P4 standards for runout and dimensional accuracy. |
| DGC | Denotes a universally matchable (SU) bearing pair, pre-set for simplified installation and optimal performance in tandem arrangements. |
71907 ACD/P4ADGC Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The 25° contact angle and high ball complement (21 balls) are engineered to deliver superior stiffness and handle significant combined loads. With a dynamic load rating of 3330 lbf and static load rating of 2812 lbf, it provides robust performance under demanding conditions.
Precision and Speed Performance: Manufactured to P4A tolerances, this bearing ensures minimal runout and vibration. The lightweight phenolic cage and optimized internal design contribute to a high limiting speed of 56,000 rpm, making it suitable for high-speed applications.
Material and Thermal Stability: Constructed from chrome steel for both rings and balls, the bearing offers high durability and wear resistance. Its specified temperature range (-30°C to 110°C) ensures stable operation in varied environments.
Simplified Assembly: The universal matchable (SU) feature allows for direct pairing without selective mounting, reducing assembly time and ensuring consistent preload and performance in matched sets.
71907 ACD/P4ADGC Bearing Typical Application Areas
The 71907 ACD/P4ADGC is ideally suited for high-performance machinery requiring extreme precision and speed, including:
- Machine Tool Spindles (e.g., CNC milling and grinding spindles)
- High-Speed Machining Centers
- Precision Robotics and Automation Equipment
- Medical Device Manufacturing Equipment
- Aerospace Actuation Systems
