S7011 CD/P4AQBCB
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S7011 CD/P4AQBCB Bearing Product Overview & Core Advantages
The S7011 CD/P4AQBCB is a precision quadruplex matched angular contact ball bearing designed for applications requiring exceptional rigidity and high-speed performance. This metric bearing features a back-to-back (QBC) arrangement of four bearings, enabling it to withstand combined radial and axial loads from both directions simultaneously. Manufactured to P4A tolerance class with a light preload (Class B), it delivers superior running accuracy and rotational stability, making it ideal for high-precision, high-reliability machinery.
S7011 CD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7011 | Basic bearing designation (55mm bore, 90mm OD, 72mm width) |
| CD | 15° contact angle design |
| P4A | High precision tolerance class (superior to ABEC 7) |
| QBC | Quadruplex Back-to-Back matched arrangement |
| B | Light preload classification |
S7011 CD/P4AQBCB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The quadruplex back-to-back arrangement creates an extremely rigid bearing system capable of handling significant combined loads. With a radial dynamic load rating of 23,400 lbf and static load rating of 29,025 lbf, this configuration provides exceptional stability under heavy operating conditions.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional tolerances (bore/OD: -0.004mm to 0), this bearing ensures minimal runout and vibration. The 15° contact angle optimizes performance for applications requiring both radial and axial load capacity.
High-Speed Capability: The phenolic cage material and precision construction enable a limiting speed of 46,000 rpm, making it suitable for high-speed spindle applications. The grease lubrication is optimized for this speed range.
Premium Materials: Constructed from chrome steel for both rings and balls (11.112mm diameter, 18 balls), this bearing offers excellent wear resistance and durability across the operating temperature range of -30°C to 110°C.
S7011 CD/P4AQBCB Bearing Typical Application Areas
The S7011 CD/P4AQBCB is specifically engineered for demanding applications including:
- Machine Tool Spindles - High-precision machining centers and grinding spindles
- High-Speed Spindles - CNC machining, milling, and drilling equipment
- Precision Instrumentation - Measuring devices and laboratory equipment
- Robotics - High-accuracy robotic arms and positioning systems
- Aerospace Components - Guidance systems and flight control mechanisms
