7215 ACDGC/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7215 ACDGC/P4A Bearing Product Overview & Core Advantages
The 7215 ACDGC/P4A is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a single bearing with a 25° contact angle and Moderate (Class C) preload, it is engineered to support high combined loads, handling significant radial and axial forces simultaneously. Manufactured to the stringent P4A tolerance class, it guarantees superior running accuracy and is universally matchable (SU), allowing for flexible mounting configurations in high-precision spindles and machinery. Its optimized internal geometry and phenolic cage contribute to outstanding high-speed performance.
7215 ACDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7215 | Basic Bearing Code | Defines the standard dimensions: 75mm Bore, 130mm OD, 25mm Width. |
| AC | Angular Contact | Optimized for combined radial and axial loads. |
| DGC | Contact Angle & Preload | Specifies a 25° contact angle and Moderate (Class C) preload for high rigidity and precise shaft positioning. |
| P4A | Tolerance Class | Denotes a high-precision bearing with extremely tight dimensional and running accuracy tolerances. |
7215 ACDGC/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The 25° contact angle and factory-set Moderate preload eliminate internal clearance, resulting in exceptional system stiffness and minimal axial/radial runout under load. This is critical for maintaining accuracy in machining and positioning applications.
Superior Load Capacity: Engineered to withstand high combined loads, this bearing efficiently manages substantial radial forces and thrust loads in one direction, making it ideal for applications like machine tool spindles.
Optimized High-Speed Performance: The lightweight and robust phenolic cage ensures stable operation and reduced centrifugal forces at high rotational speeds, supporting a limiting speed of 22,000 rpm. The open design and pre-lubrication facilitate efficient cooling and lubrication.
Precision Materials: Constructed from high-grade chrome steel for both rings and balls, the bearing ensures high durability, wear resistance, and a long operational life under demanding conditions.
7215 ACDGC/P4A Bearing Typical Application Areas
The 7215 ACDGC/P4A is the bearing of choice for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Tables: Indexing and positioning systems.
- High-Frequency Motors and Spindles: Applications requiring extreme rotational accuracy.
- Aerospace and Defense Instrumentation: Gyroscopes, radar systems, and navigation equipment.
