7204 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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Materials
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7204 CD/HCP4ADGA Bearing Product Overview & Core Advantages
The 7204 CD/HCP4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and performance. As a universally matchable (SU) bearing supplied in a pre-lubricated, matched set of two, it is engineered to accommodate combined loads (radial and axial) simultaneously. Its defining characteristics include an Extra Light (Class A) preload, a P4A super-precision tolerance class, and a hybrid ceramic ball design, making it ideal for high-speed and high-rigidity applications where rotational accuracy is paramount.
7204 CD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
- 7204: Basic designation denoting a metric, 20mm bore, 47mm OD angular contact ball bearing.
- C: Signifies a 15° contact angle, optimized for high-speed operation.
- D: Indicates the bearing is part of a universally matchable (SU) pair.
- HC: Denotes a Hybrid Ceramic construction, featuring steel rings and ceramic balls.
- P4A: The tolerance class, specifying super-precision levels for runout and dimensional accuracy.
- A: Specifies an Extra Light preload (Class A) for minimal friction and optimal high-speed performance.
- DG: Stands for a Universal Match (SU) arrangement.
- A: Confirms the 15° contact angle.
7204 CD/HCP4ADGA Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The P4A tolerance class and universal matching ensure precise shaft positioning and system stability. The phenolic cage contributes to smooth operation at high speeds with minimal friction.
Superior Load Capacity: The 15° contact angle and optimized internal geometry enable the bearing to handle significant combined loads.
Exceptional High-Speed Performance: The combination of ceramic balls (reducing centrifugal forces and friction), a lightweight phenolic cage, and an Extra Light preload allows for a very high limiting speed of 100,500 rpm.
Reduced Maintenance & Long Service Life: The bearing is pre-lubricated and features an open seal type, suitable for systems with centralized lubrication. The hybrid ceramic design offers enhanced durability and resistance to wear.
7204 CD/HCP4ADGA Bearing Typical Application Areas
This high-precision bearing is ideally suited for demanding applications such as:
- Machine Tool Spindles
- High-Speed Machining Centers
- Precision Grinding Spindles
- High-Frequency Motors
- Robotic Arm Joints and Drives
