7216 ACDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7216 ACDGB/HCP4A
Basic Information
System of measurement
Metric
Weight
1.24 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
80 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
140 mm
Outside diameter tolerance
-0.004mm to 0
Width
26 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
17.462 mm
Ball quantity
17
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
18428 lbf
Radial static load rating
16200 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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7216 ACDGB/HCP4A Bearing Product Overview & Core Advantages
The 7216 ACDGB/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and rigidity. This single bearing features a 25° contact angle and is part of a Universal Matchable (SU) set, allowing for precise preload configuration when mounted with its matched counterparts. Its core advantages include the ability to support combined loads (radial and axial) simultaneously, superior high-speed performance enabled by its phenolic cage and ceramic balls, and outstanding operational reliability due to its P4A tolerance class and light preload (Class B).
7216 ACDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle. |
| DGB | Duplex arrangement, Back-to-Back mounting. This configuration provides high rigidity and moment load capacity. |
| HC | Hybrid Ceramic: Features ceramic balls for reduced weight, lower friction, and enhanced high-speed capability. |
| P4A | Specifies a super-precision tolerance class, exceeding ABEC 7 standards, for applications requiring extreme running accuracy. |
7216 ACDGB/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The duplex back-to-back (DGB) arrangement creates a rigid bearing system that effectively withstands combined radial and axial loads as well as moment loads, making it ideal for precise spindles.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage and ceramic balls (Hybrid) significantly reduces centrifugal forces and friction, enabling a high limiting speed of 28,000 rpm. This also results in lower operating temperatures.
- Exceptional Precision: Manufactured to a P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for achieving high surface finishes and positioning accuracy in machine tools.
- Optimized for Matched Sets: As a Universal Matchable (SU) bearing, it is designed to be used in sets of three to achieve a defined light preload (Class B), eliminating internal clearance and maximizing system stiffness without custom adjustments.
7216 ACDGB/HCP4A Bearing Typical Application Areas
This precision bearing is specifically designed for high-performance machinery where speed, accuracy, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors and Spindles
- Advanced Medical Equipment: Such as dental handpieces and imaging scanners.
- Aerospace Actuation Systems
