S71915 ACDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S71915 ACDGA/P4A Bearing Product Overview & Core Advantages
The S71915 ACDGA/P4A is a super-precision angular contact ball bearing designed for applications demanding the highest levels of rotational accuracy and rigidity. As a single bearing with a 25° contact angle and Universal Matchable (SU) designation, it is engineered to handle combined loads efficiently. Its key advantages include exceptional running accuracy due to the P4A tolerance class, high-speed capability enabled by the phenolic cage, and reliable operation in a wide temperature range from -30°C to 110°C. This bearing is the ideal choice for spindles and other high-performance machinery where precision and reliability are paramount.
S71915 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Indicates a series of high-precision, high-speed angular contact ball bearings. |
| 1915 | Specifies the bearing dimensions: 75mm bore, 105mm outside diameter, 16mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a phenolic (polyamide) cage. |
| GA | Indicates a Universal Matchable (SU) bearing with Extra light (A) preload. |
| P4A | Denotes an ultra-high precision tolerance class, superior to ABEC-7. |
S71915 ACDGA/P4A Bearing Structural Features & Performance Benefits
The performance of the S71915 ACDGA/P4A is a direct result of its advanced construction:
- High Rigidity and Load Capacity: The 25° contact angle and robust construction using chrome steel rings and balls provide excellent resistance to combined radial and axial loads, ensuring stable operation under demanding conditions.
- Superior High-Speed Performance: The lightweight and durable phenolic cage is instrumental in achieving a high limiting speed of 28,000 rpm, reducing centrifugal forces and friction for smoother, cooler operation.
- Exceptional Precision: Manufactured to a P4A tolerance class with tight dimensional control on the bore, outside diameter, and width, this bearing guarantees minimal runout and superior positional accuracy.
- Sealed and Lubricated for Life: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is designed for long-term, maintenance-free operation within its specified temperature range.
S71915 ACDGA/P4A Bearing Typical Application Areas
The S71915 ACDGA/P4A is specified for high-performance applications where precision and speed are critical. Its primary uses include:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Rotary Tables and Indexing Heads
- High-Frequency Motors and Spindle Drives
- Medical and Dental Equipment (e.g., high-speed handpieces)
- Aerospace and Defense Instrumentation
