7017 ACDGB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7017 ACDGB/P4A Bearing Product Overview & Core Advantages
The 7017 ACDGB/P4A is a single row angular contact ball bearing manufactured to P4A super precision tolerance class. Engineered for applications demanding exceptional rotational accuracy and high-speed capability, this bearing is universally matchable (SU designation), allowing for precise preload control when mounted in sets. Its 25° contact angle is optimized to support significant combined loads—handling both radial and axial forces simultaneously. The phenolic resin cage and factory-applied lubrication contribute to its high-speed performance, making it an ideal choice for high-precision, high-reliability spindles and machinery.
7017 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7017 | Basic bearing series, defining the standard boundary dimensions: 85mm bore, 130mm OD, 22mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| DGB | Universal Matchable (SU) bearing. Two bearings can be paired in a back-to-back (DB) arrangement to support moment loads. |
| P4A | The tolerance class, denoting super precision. This ensures extremely tight dimensional and running accuracy for high-performance applications. |
7017 ACDGB/P4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The lightweight phenolic resin cage reduces centrifugal forces, while the optimized internal geometry and factory lubrication enable a high limiting speed of 17,000 rpm.
- Superior Rigidity & Load Capacity: The 25° contact angle provides excellent resistance to combined (radial and axial) loads. The universal matching feature allows for the creation of highly rigid, preloaded bearing sets.
- Precision Performance: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for maintaining machining accuracy and surface finish.
- Optimized Internal Geometry: With 21 precision balls of 14.288 mm diameter, the bearing achieves a high dynamic load rating of 14,332 lbf and smooth, quiet operation.
7017 ACDGB/P4A Bearing Typical Application Areas
The 7017 ACDGB/P4A is specified 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 Spindles: PCB drilling and routing machines.
- High-Frequency Motors: Spindles for integrally mounted motor applications.
- Robotics: High-accuracy rotary joints and actuators.
