7005 ACD/P4ATBTB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7005 ACD/P4ATBTB
Basic Information
System of measurement
Metric
Weight
0.24 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
36 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
4478 lbf
Radial static load rating
3375 lbf
Limiting speed
85 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
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In Stock
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7005 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The 7005 ACD/P4ATBTB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This bearing is supplied as a triplex back-to-back (TBT) matched set, pre-loaded to Light / Class B specifications, ensuring optimal performance and immediate operational readiness. Its primary advantage lies in its ability to handle combined loads—significant radial and axial loads—simultaneously, making it ideal for high-precision, high-rigidity spindles and other critical machinery components.
7005 ACD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7005 | Standard bearing series designation, indicating a 25mm bore, 47mm OD, and 12mm width per single bearing. |
| ACD | Angular Contact design with a 25° contact angle, optimized for carrying combined axial and radial loads. |
| P4A | Indicates a high-precision tolerance class exceeding standard P4, ensuring extremely tight running accuracy for bore, outside diameter, and width. |
| TBT | Specifies the Triplex Back-to-Back matched arrangement. Three bearings are mounted together with their back faces opposing, providing maximum system rigidity and moment load capacity. |
7005 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
- Superior Rigidity and Load Capacity: The triplex back-to-back (TBT) configuration creates a highly rigid bearing system capable of withstanding heavy combined loads and moment loads, which is critical for maintaining precision under operational stress.
- High-Speed Capability: The phenolic cage is lightweight and robust, contributing to lower centrifugal forces and smoother operation at the high limiting speed of 85,000 rpm. The 25° contact angle provides an excellent balance between axial load capacity and speed performance.
- Precision Performance: Manufactured to P4A tolerance class with extremely tight dimensional tolerances, this bearing ensures minimal runout and vibration, which is essential for applications requiring the highest levels of accuracy.
- Optimized Material Selection: Constructed from chrome steel for both rings and balls, the bearing offers high durability and fatigue resistance. The set is pre-lubricated for immediate use within its specified temperature range.
7005 ACD/P4ATBTB Bearing Typical Application Areas
This precision bearing set is engineered for the most demanding applications, including:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Rigidity CNC Machining Centers
- Robotic Arm Precision Joints
- Advanced Medical and Dental Equipment
