S7011 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7011 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.32 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.008mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
18
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
8348 lbf
Radial static load rating
6975 lbf
Limiting speed
17 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 433.83
/ each
In Stock
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S7011 ACD/HCP4A Bearing Product Overview & Core Advantages
The S7011 ACD/HCP4A is a precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single-row bearing is distinguished by its P4 (ABEC-7) tolerance class, ensuring ultra-precise running characteristics. Its 25° contact angle is optimized to support significant combined loads—handling both radial and axial forces efficiently. The use of ceramic balls and a phenolic cage contributes to superior high-speed capabilities and reduced rotational mass, making it ideal for high-reliability, high-rigidity applications where precision is paramount.
S7011 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S7011 ACD/HCP4A provides specific technical details:
- S7011: Denotes the basic bearing series and size (55mm bore, 90mm OD, 18mm width).
- A: Indicates a 25° contact angle.
- CD: Signifies that the bearing is supplied with a preload for enhanced rigidity and precise shaft positioning.
- HCP4A: This suffix combination specifies:
- HC: Denotes the use of Hybrid Ceramic components (ceramic balls with steel rings).
- P4: Identifies the tolerance class P4 (ABEC-7), indicating very high precision.
- A: Reiterates the 25° contact angle.
S7011 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The P4 tolerance class and availability of preload (CD) ensure minimal runout and superior rotational accuracy, providing a stable and rigid support for spindles and shafts.
- Superior High-Speed Performance: The combination of low-density ceramic balls and a lightweight phenolic resin cage significantly reduces centrifugal forces, enabling a high limiting speed of 17,000 rpm. This design minimizes friction and heat generation.
- Excellent Load Capacity: The 25° contact angle is engineered to efficiently handle substantial combined radial and axial loads, making it suitable for applications with complex loading conditions.
- Durability and Long Service Life: Ceramic balls offer higher hardness, lower thermal expansion, and electrical insulation properties compared to steel, leading to increased bearing life, especially in high-speed or electrically challenging environments. The sealed design helps retain lubrication and exclude contaminants.
S7011 ACD/HCP4A Bearing Typical Application Areas
The S7011 ACD/HCP4A is ideally suited for high-performance machinery and precision equipment, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Drives and Motors: Servo motors, high-frequency spindles, and robotics.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and auxiliary power units.
- Medical and Laboratory Equipment: High-speed centrifuges and dental handpieces.
