7012 ACDGC/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7012 ACDGC/P4A
Basic Information
System of measurement
Metric
Weight
0.4 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
60 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
95 mm
Outside diameter tolerance
-0.004mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
19
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
8775 lbf
Radial static load rating
7538 lbf
Limiting speed
35 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7012 ACDGC/P4A Bearing Product Overview & Core Advantages
The 7012 ACDGC/P4A is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to a P4A tolerance class, it delivers superior running precision. Its defining feature is the 25° contact angle, which is optimized to support combined loads—significant radial loads acting in conjunction with high axial loads in one direction. The Moderate (Class C) preload ensures high system stiffness and minimizes axial and radial runout, making it ideal for high-precision, high-reliability machinery where positioning accuracy is critical.
7012 ACDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance & Advantage |
|---|---|---|
| ACD | Angular Contact Design, 25° contact angle | Optimized for handling high axial loads and combined loads. |
| GC | Moderate Preload (Class C) | Provides high rigidity and reduces vibration for precise shaft positioning. |
| P4A | High Precision Tolerance Class | Exceeds ABEC-7 standards, ensuring extremely tight dimensional and running accuracy for high-speed and precision applications. |
7012 ACDGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The combination of a 25° contact angle and Moderate preload (GC) creates an exceptionally stiff bearing unit. This minimizes deflection under load, which is crucial for maintaining accuracy in machine tools and precision spindles.
- Superior Load Capacity: As an angular contact bearing, it is specifically designed to carry heavy combined loads (simultaneous radial and axial loads) efficiently.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, lowers friction, and allows for a high limiting speed of 35,000 rpm. The open design facilitates efficient lubrication management for high-speed operation.
- Universal Matching Capability (SU): This bearing is Universal Matchable, meaning multiple bearings can be mounted together in a set (e.g., duplex or triplex arrangements) to share loads and increase overall system rigidity and capacity. The provided set includes 3 bearings.
7012 ACDGC/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for demanding applications where high speed, rigidity, and accuracy are non-negotiable. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling spindles and other high-frequency motor spindles.
- High-Speed Automation: Robotic arms and high-speed pick-and-place units.
- Aerospace & Defense: Gyroscopes, radar systems, and other precision instrumentation.
