7214 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7214 CD/HCP4ADGA
Basic Information
System of measurement
Metric
Weight
1.9 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
70 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
125 mm
Outside diameter tolerance
-0.004mm to 0
Width
48 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
16
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
25200 lbf
Radial static load rating
26100 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 844.32
/ each
In Stock
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7214 CD/HCP4ADGA Bearing Product Overview & Core Advantages
The 7214 CD/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. As a universal matchable (SU) bearing supplied in a pre-lubricated, matched set of two, it is engineered to accommodate combined radial and axial loads simultaneously. Its core advantages include superior running accuracy due to the P4A tolerance class, high-speed capability enabled by the phenolic cage and ceramic balls, and reliable operation within a wide temperature range. This bearing is the ideal solution for high-rigidity, high-reliability spindle arrangements.
7214 CD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 7214 CD/HCP4ADGA is decoded as follows:
- 7214: Basic series designation, indicating a light series angular contact ball bearing with a 70mm bore and 125mm OD.
- C: Signifies a 15° contact angle.
- D: Indicates the bearing is supplied as a matched set of two in a universal arrangement (DB or DF).
- HC: Denotes the use of Hybrid Ceramic components (ceramic balls with steel rings).
- P4A: Specifies a very high precision tolerance class, exceeding ABEC 7/ISO P4 standards.
- A: Indicates an Extra Light (A) preload.
- DG: Stands for Universal Matchable (SU), meaning the two bearings in the set can be mounted in either a back-to-back (DB) or face-to-face (DF) configuration.
- A: Confirms the 15° contact angle (reiterated).
7214 CD/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The universal matched pair (SU) setup creates a rigid bearing system that can handle significant combined loads and moment loads, providing exceptional stability for spindles.
- Superior High-Speed Performance: The combination of a lightweight phenolic resin cage and hybrid ceramic balls (silicon nitride) significantly reduces centrifugal forces and friction, enabling a high limiting speed of 28,000 rpm. Ceramic balls also exhibit lower thermal expansion.
- High Precision & Long Service Life: Manufactured to a P4A tolerance class, this bearing ensures minimal runout and vibration. The ceramic balls are harder and smoother than steel, leading to reduced wear and an extended operational lifespan, especially in contaminated or marginal lubrication environments.
- Optimized Preload: The Extra Light (A) preload is ideal for high-speed applications, minimizing heat generation while maintaining shaft positioning accuracy.
7214 CD/HCP4ADGA Bearing Typical Application Areas
This precision bearing is specifically designed for high-performance machinery, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling spindles and other high-speed automated equipment.
- High-Frequency Motors: Spindles for routers and other applications requiring extreme rotational speeds.
- Medical Equipment: High-speed centrifuges and dental handpieces.
- Aerospace & Defense Systems: Gyroscopes and other critical navigation or control systems.
