727 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
727 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.012 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
7 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
22 mm
Outside diameter tolerance
-0.005mm to 0
Width
7 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
9
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
655 lbf
Radial static load rating
252 lbf
Limiting speed
130 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:
$ 102.06
/ each
In Stock
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727 ACD/HCP4A Bearing Product Overview & Core Advantages
The 727 ACD/HCP4A is a single-row angular contact ball bearing engineered for applications demanding high precision and high-speed performance. Its defining characteristic is the 25° contact angle, which is optimized to support significant combined loads—handling both radial and axial forces simultaneously. Manufactured to the exacting P4 (ABEC-7) tolerance class, this bearing ensures exceptional running accuracy. The combination of a ceramic ball material and a phenolic cage contributes to lower friction, reduced weight, and the capability to operate at a limiting speed of 130,000 rpm, making it a superior choice for high-velocity spindles and precision machinery.
727 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 727 ACD/HCP4A provides detailed technical specifications through its suffixes:
- 727: Basic bearing series designation.
- ACD: Indicates an Angular Contact design with a 25° contact angle.
- H: Denotes the use of high-performance Hybrid Ceramic balls (Ceramic balls with steel rings).
- C: Specifies the Phenolic (Polymer) Cage material.
- P4A: Defines the tolerance class as P4 (ABEC-7), indicating ultra-precision manufacturing standards.
727 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed & Low Friction: The hybrid ceramic construction (chrome steel rings with ceramic balls) significantly reduces centrifugal forces and friction, enabling stable operation at the 130,000 rpm limiting speed. The lightweight phenolic cage further enhances high-speed stability and reduces inertia.
- Precision & Rigidity: Built to P4 tolerance class, this bearing guarantees minimal runout and vibration, which is critical for applications requiring high positional accuracy. The 25° contact angle provides excellent axial rigidity, effectively resisting thrust loads.
- Combined Load Capacity: The angular contact design is inherently suited for carrying combined radial and axial loads simultaneously, a common requirement in machine tool spindles and high-performance motors.
- Preload Availability: The bearing is supplied with a preload, which increases system stiffness, minimizes axial and radial play, and improves rotational accuracy under load.
- Wide Temperature Range: Capable of operating within a temperature range of -30°C to 110°C, ensuring reliable performance in various environmental conditions.
727 ACD/HCP4A Bearing Typical Application Areas
The 727 ACD/HCP4A is ideally suited for high-performance applications where speed, precision, and reliability are paramount. Key industries and equipment include:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors and Spindles
- Dental and Medical Handpiece Drives
- Aerospace Actuation Systems
- Advanced Robotics and Automation
