7009 ACD/P4AQBTC
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7009 ACD/P4AQBTC
Basic Information
System of measurement
Metric
Weight
0.94 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
45 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
75 mm
Outside diameter tolerance
-0.004mm to 0
Width
64 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
17
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
16380 lbf
Radial static load rating
19125 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Quadruplex Tandem Back-to-Back (QBT)
Number of bearings in matched set
4
Universal matching bearing
No (Standard)
Preload
Moderate / Class C
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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7009 ACD/P4AQBTC Bearing Product Overview & Core Advantages
The 7009 ACD/P4AQBTC is a precision quadruplex matched set of angular contact ball bearings, designed for applications demanding the highest levels of rigidity and load capacity. This specific arrangement, Quadruplex Tandem Back-to-Back (QBT), is engineered to handle combined loads—significant radial and thrust loads from both directions—simultaneously. With a P4A tolerance class and moderate preload (Class C), it delivers exceptional running accuracy and stability, making it ideal for high-precision, high-reliability machinery where minimal deflection is critical.
7009 ACD/P4AQBTC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7009 | Basic bearing series and size designation. | Defines the core dimensions: 45mm bore, 75mm OD, 64mm width. |
| ACD | Angular Contact Design with a 25° contact angle. | Optimized for carrying heavy thrust loads in combination with radial loads. |
| P4A | High precision tolerance class. | Guarantees extremely tight dimensional and running accuracy for superior performance. |
| QBT | Quadruplex Tandem Back-to-Back matched arrangement. | Four bearings are precision-matched and mounted to provide maximum system rigidity and moment load capacity. |
| C | Moderate preload. | Reduces bearing deflection under load, enhancing stiffness and rotational accuracy. |
7009 ACD/P4AQBTC Bearing Structural Features & Performance Benefits
- Exceptional Rigidity and Load Capacity: The QBT matched set of four bearings creates an extremely stiff bearing system, capable of supporting high radial dynamic load ratings of 16,380 lbf and radial static load ratings of 19,125 lbf. This configuration is exceptionally resistant to moment loads and operational deflection.
- Optimized for Combined Loads: The 25° contact angle is ideal for applications where significant thrust and radial loads are present simultaneously, ensuring reliable performance under complex loading conditions.
- High-Speed Capability: The lightweight phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 41,000 rpm. This makes the bearing suitable for high-speed spindle applications.
- Precision Performance: Manufactured to P4A tolerance standards with a moderate preload, this bearing set guarantees low noise, minimal vibration, and precise rotational accuracy, which is critical in machining and measurement.
- Robust Material Construction: Components made from chrome steel (rings and balls) ensure high durability, long service life, and consistent performance within a temperature range of -30°C to 110°C.
7009 ACD/P4AQBTC Bearing Typical Application Areas
This precision quadruplex bearing set is specifically designed for the most demanding applications, including:
- High-Precision Machine Tool Spindles: For CNC milling centers, grinding spindles, and jig borers where extreme rigidity and accuracy are non-negotiable.
- High-Speed Machining Centers: Supporting spindles that operate at very high RPMs while maintaining precision.
- Precision Robotic Drives: In critical joints and axes requiring high moment stiffness and rotational accuracy.
- Advanced Aerospace and Defense Systems: In gyroscopes, radar systems, and other instrumentation requiring the highest level of performance reliability.
