S7212 ACD/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7212 ACD/HCP4ADT
Basic Information
System of measurement
Metric
Weight
1.42 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
60 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
110 mm
Outside diameter tolerance
-0.004mm to 0
Width
44 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
14.288 mm
Ball quantity
16
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
19890 lbf
Radial static load rating
20250 lbf
Limiting speed
32.5 X 1000 rpm
Lubrication
Grease
Matched arrangement
Duplex Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
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S7212 ACD/HCP4ADT Bearing Product Overview & Core Advantages
The S7212 ACD/HCP4ADT is a high-precision duplex tandem angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This sealed bearing features a P4A tolerance class and is preloaded, delivering superior rotational accuracy, high rigidity, and reliable operation under combined loads. Its compact design, incorporating two bearings in a matched set, is engineered for high-speed operation and long service life in precision machinery.
S7212 ACD/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7212 | Basic bearing series designation. |
| ACD | Angular Contact, Duplex arrangement (Tandem). |
| HC | Hybrid Ceramic (Ceramic balls with steel rings). |
| P4A | High-Precision Tolerance Class (superior to ABEC 7). |
S7212 ACD/HCP4ADT Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction, heat generation, and wear, enabling higher limiting speeds and extended service life compared to all-steel bearings.
- Duplex Tandem (DT) Preload: The two bearings are universally matched and preloaded in a tandem arrangement. This configuration provides maximum axial stiffness and is optimized for applications where high unidirectional thrust loads are predominant.
- High-Speed Phenolic Cage: The phenolic cage material offers excellent strength-to-weight ratio and operates smoothly at high rotational speeds, contributing to the bearing's high-speed performance.
- Sealed & Grease-Lubricated: The integral seals protect against contamination and retain the high-performance grease, making the unit virtually maintenance-free and suitable for the specified temperature range of -30°C to 110°C.
- Superior Load Capacity: With a 25° contact angle and robust construction, this bearing is engineered to handle significant radial dynamic and static loads, making it ideal for high rigidity applications.
S7212 ACD/HCP4ADT Bearing Typical Application Areas
This high-precision, high-speed bearing is ideally suited for advanced industrial and technological applications, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring extreme accuracy and rigidity.
- High-Frequency Motors & Spindles: Used in applications demanding low inertia and minimal heat generation.
- Precision Robotics: In critical joints and arm assemblies where high stiffness and reliability are paramount.
- Aerospace & Defense Systems: For gyroscopes, navigation systems, and other precision instrumentation.
- Medical Equipment: In high-speed dental handpieces and laboratory centrifuges.
