7214 ACDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
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7214 ACDGB/HCP4A Bearing Product Overview & Core Advantages
The 7214 ACDGB/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This single-row bearing features a 25° contact angle and is supplied as part of a universally matchable set of 4 bearings, enabling simplified assembly of preloaded duplex arrangements. Its core advantages include superior high-speed capability with a limiting speed of 28,000 rpm, excellent rigidity due to its optimized internal geometry, and the ability to handle significant combined loads (radial and axial). Manufactured to P4A tolerance class, it guarantees ultra-precise rotational accuracy for critical machinery.
7214 ACDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
- 7214: Basic designation indicating a metric series bearing with a 70mm bore and 125mm outside diameter.
- AC: Angular Contact design with a contact angle optimized for combined loads.
- D: Signifies a specific internal design and optimized internal clearance for universal matching (SU).
- GB: Indicates a Light preload / Class B is applied to the bearing.
- HC: Denotes the use of Hybrid Ceramic components (ceramic balls with steel rings).
- P4A: Specifies the tolerance class, representing very high dimensional and running accuracy exceeding ABEC 7.
7214 ACDGB/HCP4A Bearing Structural Features & Performance Benefits
The performance of the 7214 ACDGB/HCP4A is driven by its advanced material selection and precise engineering. The hybrid ceramic construction, featuring ceramic balls and chrome steel rings, significantly reduces friction and heat generation, directly contributing to its exceptional high-speed performance. This construction also enhances durability and extends service life, especially in potentially corrosive environments. The phenolic resin cage is lightweight and robust, ensuring stable operation at high rotational speeds. The bearing is pre-lubricated and comes with a light preload (Class B), which eliminates internal clearance, increases system rigidity, and ensures precise shaft positioning without the need for initial adjustment.
7214 ACDGB/HCP4A Bearing Typical Application Areas
This high-precision, high-speed bearing is ideally suited for applications where rotational accuracy and reliability are paramount. Typical industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and auxiliary power units.
- High-Frequency Motors and Spindles: Used in PCB drilling and semiconductor manufacturing equipment.
