S7214 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7214 ACDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.97 kg
Tolerance class
P4A
Seal type
Sealed
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
24 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
16
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
14918 lbf
Radial static load rating
12375 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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S7214 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The S7214 ACDGA/HCP4A is a high-precision, single-row angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. Engineered to accommodate combined loads (radial and axial loads in one direction), its core advantages stem from its P4A super-precision tolerance class, ceramic ball construction, and phenolic resin cage. This combination delivers superior rigidity, extended service life, and reliable operation at high rotational speeds, making it ideal for high-reliability spindles and precision machinery.
S7214 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7214 | Bearing series and size designation (70mm bore, 125mm OD). |
| AC | 25° Contact Angle. |
| DGA | Duplex arrangement face-to-face (DF) with Extra Light (A) preload. |
| HC | Hybrid Ceramic: Ceramic balls with steel rings. |
| P4A | Tolerance class P4A, indicating super precision for spindle applications. |
S7214 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The P4A tolerance class and controlled preload ensure minimal runout and high system stiffness, critical for machining accuracy.
- Superior High-Speed Capability: The lightweight phenolic cage and low-density ceramic balls reduce centrifugal forces, enabling a high limiting speed of 28,000 rpm.
- Enhanced Durability & Temperature Performance: Ceramic balls offer lower friction, reduced heat generation, and excellent performance across the specified temperature range (-30°C to 110°C).
- Optimized Load Capacity: The 25° contact angle is optimized to handle significant axial loads in addition to radial loads, with a high dynamic load rating.
- Universal Matchable Design (SU): Bearings are universally matchable, allowing for flexible mounting in duplex sets (back-to-back, face-to-face, or tandem) to achieve the required stiffness and load capacity.
S7214 ACDGA/HCP4A Bearing Typical Application Areas
This bearing is specifically engineered for high-performance applications, including:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Grinding Equipment
- High-Frequency Motor Spindles
- Aerospace & Defense Instrumentation
- Medical & Dental Drill Handpieces
