7005 ACE/P4ADBB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7005 ACE/P4ADBB
Basic Information
System of measurement
Metric
Weight
0.15 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.004mm to 0
Width
24 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
14
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2858 lbf
Radial static load rating
1755 lbf
Limiting speed
75 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
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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7005 ACE/P4ADBB Bearing Product Overview & Core Advantages
The 7005 ACE/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back (DB) arrangement is preloaded to Light / Class B specifications, ensuring optimal performance under combined radial and axial loads. Manufactured to a P4A tolerance class, it delivers superior running accuracy, making it ideal for high-speed spindles and other high-precision machinery where stability and minimal runout are critical.
7005 ACE/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7005 | Basic bearing series, indicating a 25 mm bore diameter and specific cross-section. |
| ACE | Internal design code, typically signifying a 25° contact angle and optimized internal geometry for high-speed operation. |
| P4A | Indicates a high precision tolerance class (superior to ABEC 7), governing dimensional and running accuracy. |
| DB | Specifies the Duplex Back-to-Back mounting arrangement, providing high rigidity against moment loads. |
7005 ACE/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The back-to-back duplex arrangement creates a wide effective spread, significantly increasing the bearing's resistance to moment loads and providing exceptional operational stiffness, which is crucial for maintaining precision under heavy combined loads.
- Optimized for High Speeds: The phenolic resin cage is lightweight and possesses excellent sliding properties, contributing to lower friction and enabling the bearing to achieve a high limiting speed of 75,000 rpm. The standard 25° contact angle provides an optimal balance between radial and axial load capacity for high-speed applications.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on the bore, outside diameter, and width, this bearing ensures minimal vibration and precise shaft positioning, directly contributing to the accuracy of the final application.
- Superior Load Capacity: With a dynamic load rating of 2858 lbf and a static load rating of 1755 lbf, the bearing is engineered to handle significant radial and axial forces simultaneously, ensuring long-term reliability.
7005 ACE/P4ADBB Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring utmost precision and rigidity.
- Precision Grinding Spindles: Applications where surface finish and dimensional accuracy are paramount.
- High-Frequency Motors: Spindles for PCB drilling and other high-RPM electric motors.
- Medical Equipment: High-speed rotors in dental handpieces and laboratory centrifuges.
- Aerospace Instrumentation: Gyroscopes and other navigation systems demanding high accuracy and reliability.
