7012 ACDGA/HCP4AL
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7012 ACDGA/HCP4AL
Basic Information
System of measurement
Metric
Weight
0.34 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
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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7012 ACDGA/HCP4AL Bearing Product Overview & Core Advantages
The 7012 ACDGA/P4AL is a single row angular contact ball bearing designed for ultra-high precision and performance applications. Engineered to a P4A tolerance class, it offers exceptional dimensional and running accuracy. A key advantage is its universal matchable (SU) design, allowing multiple bearings to be flexibly combined in various arrangements to achieve optimal stiffness and load capacity. The use of ceramic balls and a phenolic cage contributes to superior high-speed performance, reduced weight, and extended service life, making it ideal for demanding, high-rotation machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7012 | Basic bearing series and size designation (60mm bore, 95mm OD, 18mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| DGA | Duplex arrangement, Ground preload, and "A" preload magnitude (Extra light). |
| P4A | Indicates a super-precision tolerance class with very tight dimensional and running accuracy limits. |
| L | Light pre-lubrication for initial operation. |
7012 ACDGA/HCP4AL Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The extra light preload (Class A) and P4A tolerance class ensure minimal axial and radial play, providing exceptional system rigidity and positional accuracy for precision equipment.
- Superior High-Speed Capability: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic resin cage enables a very high limiting speed of 35,000 rpm, reducing friction and heat generation.
- Optimized Load Capacity: The 25° contact angle is engineered to efficiently support combined loads, handling significant radial and one-direction axial loads simultaneously.
- Universal Matching: As a Universal Matchable (SU) bearing supplied in a set of 3, it offers unparalleled flexibility. Engineers can configure bearings in back-to-back (DB), face-to-face (DF), or tandem (DT) arrangements to meet specific application requirements for moment stiffness and thermal expansion management.
7012 ACDGA/HCP4AL Bearing Typical Application Areas
This precision angular contact bearing is critical in high-performance applications, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring extreme accuracy and rigidity.
- High-Frequency Spindles: Used in PCB drilling and precision engraving machines.
- Robotic Drives: Particularly in the articulated arms of high-speed industrial robots.
- Aerospace & Defense Systems: In gyroscopes, radar systems, and other precision instrumentation.
