7007 ACD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7007 ACD/HCP4ADGA Bearing Product Overview & Core Advantages
The 7007 ACD/HCP4ADGA is a high-precision, angular contact ball bearing designed for applications demanding exceptional accuracy and performance. This universally matchable (SU) bearing is part of a pre-matched set, enabling simplified installation and optimal performance in pairs. Its core advantages include the ability to handle combined loads (radial and axial) simultaneously, a high limiting speed of 56,000 rpm, and superior rigidity due to its specific design and P4A super-precision tolerance class. The use of a ceramic ball and phenolic cage combination further enhances its suitability for high-speed operation.
7007 ACD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 7007 ACD/HCP4ADGA provides a detailed technical specification:
- 7007: Basic bearing series, indicating a 35mm bore, 62mm OD, and 28mm width.
- A: Signifies a 25° contact angle, optimized for carrying higher axial loads.
- CD: Indicates a Universal Matchable (SU) design. Two bearings can be paired in a "back-to-back" (DB) or "face-to-face" (DF) arrangement to support moment loads.
- HC: Denotes the use of Hybrid Ceramic balls (Silicon Nitride), which reduce weight, friction, and heat generation, contributing to the high limiting speed.
- P4A: Specifies the tolerance class, which is superior to ABEC 7/ISO P4, ensuring extremely tight dimensional and running accuracy for high-precision applications.
- DGA: Indicates a Phenolic (Polyamide) cage, which is lightweight and ideal for high-speed operation, and the bearing is Lubricated with grease suitable for the specified temperature range.
7007 ACD/HCP4ADGA Bearing Structural Features & Performance Benefits
The performance of the 7007 ACD/HCP4ADGA is a direct result of its advanced materials and construction:
- High Rigidity & Load Capacity: The 25° contact angle and universal matchable design allow the bearing to support significant combined radial and axial loads. When used in pairs, this configuration provides high system rigidity, resisting moment loads.
- Superior High-Speed Performance: The combination of ceramic balls and a lightweight phenolic cage minimizes centrifugal forces and friction, enabling a very high limiting speed of 56,000 rpm. This makes it an ideal high-speed bearing.
- Precision and Accuracy: Manufactured to a P4A super-precision tolerance, this bearing ensures minimal runout and vibration, which is critical for maintaining accuracy in sensitive machinery.
- Optimized for Matched Sets: Being Universal Matchable (SU), two bearings are supplied as a pre-engineered set to ensure optimal preload and performance when mounted together, simplifying the assembly process.
7007 ACD/HCP4ADGA Bearing Typical Application Areas
This bearing is engineered for high-performance applications where speed, precision, and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- High-Frequency Motors and Spindles: Especially in CNC and PCB drilling applications.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
