7005 ACD/P4ADBB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7005 ACD/P4ADBB
Basic Information
System of measurement
Metric
Weight
0.16 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
3330 lbf
Radial static load rating
2250 lbf
Limiting speed
85 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
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In Stock
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7005 ACD/P4ADBB Bearing Product Overview & Core Advantages
The **7005 ACD/P4ADBB** is a **P4A-class ultra-precision duplex angular contact ball bearing** designed for applications demanding exceptional rotational accuracy and rigidity. This **metric bearing** features a **back-to-back (DB) matched arrangement** with **light preload (Class B)**, enabling it to handle **combined radial and axial loads** simultaneously. Its optimized design, incorporating a phenolic cage and a 25° **contact angle**, ensures **high-speed capability** and **superior running accuracy**, making it ideal for high-performance spindles and precision machinery.
7005 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7005 | Basic bearing series, indicating a 25 mm bore, 47 mm OD, and 24 mm width. |
| AC | **Angular Contact** design with a 25° contact angle. |
| D | **Duplex** bearing set (two bearings supplied as a matched pair). |
| /P4A | **Ultra-precision tolerance class** (P4A), exceeding ABEC-7 standards for exceptional dimensional and running accuracy. |
| DB | **Back-to-Back (DB) arrangement**, providing high moment rigidity and excellent stability under complex loads. |
| B | **Light preload** (Class B) applied to the matched set, minimizing deflection and ensuring precise shaft positioning. |
7005 ACD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The back-to-back (DB) duplex arrangement creates a wide effective spread, significantly increasing system moment rigidity and resistance to overturning moments, which is critical for machine tool spindles.
- Superior Load Capacity: The 25° contact angle and duplex design enable the bearing to support substantial combined loads (radial and axial) in both directions, ensuring reliable performance under demanding conditions.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the P4A precision and optimized internal geometry contribute to low heat generation and smooth operation at the limiting speed of 85,000 rpm.
- Pre-Configured for Precision: Supplied as a matched set with light preload, this bearing eliminates internal clearance, reduces runout, and is ready for installation, simplifying assembly and guaranteeing immediate high-accuracy performance.
7005 ACD/P4ADBB Bearing Typical Application Areas
This bearing is engineered for high-precision, high-speed applications, including:
- Machine Tool Spindles: CNC machining centers, grinding spindles, and milling spindles requiring high rigidity and running accuracy.
- Precision Rotary Systems: High-frequency spindles, measuring instruments, and optical scanners.
- High-Speed Motors: Servo motors and spindle drives where minimal runout and thermal stability are paramount.
