7012 CD/P4ATBTB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7012 CD/P4ATBTB
Basic Information
System of measurement
Metric
Weight
1.21 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
54 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
19
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
19598 lbf
Radial static load rating
23400 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Triplex Back-to-Back (TBT)
Number of bearings in matched set
3
Universal matching bearing
No (Standard)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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7012 CD/P4ATBTB Bearing Product Overview & Core Advantages
The 7012 CD/P4ATBTB is a precision angular contact ball bearing configured as a triplex back-to-back (TBT) matched set. Engineered for applications demanding exceptional rotational accuracy and rigidity, this bearing arrangement is optimized to handle combined loads (radial and axial) simultaneously. The P4A tolerance class ensures ultra-precise dimensions and running accuracy, making it ideal for high-speed spindles and other precision machinery where minimal runout and high system stiffness are critical.
7012 CD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
The model number 7012 CD/P4ATBTB is decoded as follows:
- 7012: Basic bearing series and size designation (60mm bore, 95mm OD).
- C: Denotes a 15° contact angle, optimized for high-speed operation and moderate axial load capacity.
- D: Indicates a specific internal design for light preload (Class B), enhancing system rigidity and minimizing deflection.
- P4A: Specifies an ultra-precision tolerance class with stricter limits on dimensional and running accuracy than ABEC 7.
- TBT: Identifies the bearing as part of a Triplex Back-to-Back matched set of three bearings, designed to provide maximum rigidity against moment loads.
7012 CD/P4ATBTB Bearing Structural Features & Performance Benefits
- Superior Rigidity and Stability: The triplex back-to-back (TBT) arrangement creates a wide, stable support system that provides exceptional resistance to moment loads and shaft deflection, crucial for maintaining precision in machining operations.
- High-Speed Capability: The 15° contact angle and phenolic resin cage reduce friction and centrifugal forces, enabling high limiting speeds (up to 34,000 rpm). This makes the bearing suitable for demanding high-speed applications.
- Precision Performance: Manufactured to P4A tolerance standards, this bearing guarantees minimal running vibration and superior positional accuracy, directly contributing to the finish quality and precision of the end application.
- Optimized Load Capacity: The design effectively handles combined radial and axial loads. The matched set and preload ensure consistent performance and load distribution across all three bearings.
7012 CD/P4ATBTB Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is typically employed in:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: For PCB drilling, semiconductor manufacturing, and other high-accuracy processes.
- High-Frequency Motors and other precision rotary systems requiring minimal vibration.
