S7020 ACE/P4ADT
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S7020 ACE/P4ADT Bearing Product Overview & Core Advantages
The S7020 ACE/P4ADT is a metric duplex tandem (DT) angular contact ball bearing designed for applications demanding exceptional precision and rigidity. This preloaded matched set delivers superior performance in handling combined radial and axial loads simultaneously. Manufactured to a P4A super-precision tolerance class and featuring a 25° contact angle, it is engineered for high-speed operation, exceptional rotational accuracy, and long-term reliability in demanding industrial environments. Its compact design integrates two bearings into a single, robust unit.
S7020 ACE/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Interpretation | Technical Significance |
|---|---|---|
| S7020 | Basic Bearing Series & Size | Denotes a 100 mm bore, 150 mm OD, 48 mm width angular contact bearing. |
| ACE | Contact Angle & Design | Indicates a 25° contact angle, optimized for high axial load capacity and rigidity. |
| P4A | Tolerance Class | Specifies super-precision running accuracy and dimensional tolerances for high-speed, high-accuracy applications. |
| DT | Matched Arrangement | Signifies a Duplex Tandem set. Two bearings are mounted together to increase axial load capacity in one direction. |
S7020 ACE/P4ADT Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The duplex tandem (DT) arrangement creates an exceptionally rigid bearing system, capable of supporting high combined radial and axial loads. The 25° contact angle is specifically engineered to maximize axial load carrying capability.
Precision High-Speed Performance: The phenolic resin cage ensures low friction, excellent dimensional stability, and is ideal for high-speed operation, contributing to the bearing's limiting speed of 16,250 rpm. The P4A tolerance class guarantees minimal runout and smooth, precise rotation.
Sealed and Lubricated for Life: As a sealed bearing pre-lubricated with grease, the S7020 ACE/P4ADT is protected from contamination and is effectively maintenance-free within its specified operating temperature range of -30°C to 110°C.
Premium Material Construction: Manufactured from chrome steel for both rings and balls, this bearing offers high fatigue life and durability under demanding operating conditions.
S7020 ACE/P4ADT Bearing Typical Application Areas
The S7020 ACE/P4ADT is ideally suited for high-performance machinery requiring superior precision, rigidity, and speed. Key applications include:
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Speed Spindles for precision machining
- Industrial Pumps and Compressors
- Precision Gearboxes and Transmission Systems
- Robotic Arm Joints and Rotary Axes
