7207 ACD/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7207 ACD/HCP4ADBA
Basic Information
System of measurement
Metric
Weight
0.48 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
35 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.004mm to 0
Width
34 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
13
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
11115 lbf
Radial static load rating
9338 lbf
Limiting speed
56 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
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
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7207 ACD/HCP4ADBA Bearing Product Overview & Core Advantages
The 7207 ACD/HCP4ADBA is a duplex pair of precision angular contact ball bearings, pre-matched in a Back-to-Back (DB) arrangement. This configuration is engineered to provide exceptional rigidity and stability, making it ideal for applications requiring high running accuracy and the ability to withstand combined loads (radial and axial loads from both directions). The use of ceramic balls and a P4A super-precision tolerance class ensures superior high-speed performance and minimal thermal expansion, which is critical for demanding machine tool and precision equipment applications.
7207 ACD/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
The model number 7207 ACD/HCP4ADBA is decoded as follows:
- 7207: Standard bearing series designation (35mm bore, 72mm OD).
- AC: Angular Contact design with a 25° contact angle.
- D: Signifies the bearing is part of a Duplex (pre-assembled pair).
- DB: Specifies the Back-to-Back mounting arrangement of the duplex pair.
- HC: Indicates the use of Hybrid Ceramic balls (steel rings with ceramic balls).
- P4A: Denotes a super-precision tolerance class (exceeding ABEC 7), ensuring extremely tight dimensional and running accuracy.
- A: Specifies an Extra Light preload on the matched set for optimal stiffness and minimal deflection under load.
7207 ACD/HCP4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The Back-to-Back (DB) duplex arrangement creates a wide, rigid support system that effectively resists moment loads and provides exceptional operational stability.
- Superior High-Speed Capability: The combination of hybrid ceramic balls (lighter and harder than steel) and a lightweight phenolic resin cage significantly reduces centrifugal forces, enabling higher limiting speeds (56,000 rpm) and reduced operating temperatures.
- Precision Performance: Manufactured to P4A super-precision standards, this bearing ensures minimal runout and vibration, which is paramount for applications demanding the highest levels of accuracy.
- Optimized Load Capacity: The 25° contact angle is optimized to handle significant combined radial and axial loads simultaneously, making it a robust choice for complex loading conditions.
7207 ACD/HCP4ADBA Bearing Typical Application Areas
This high-precision duplex bearing set is specifically designed for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines, precision grinding equipment.
- High-Frequency Motors: Spindles for routers and other high-RPM electric motors.
- Aerospace & Defense Systems: Gyroscopes, navigation instruments, and other critical rotating assemblies.
