7005 ACDGD/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7005 ACDGD/P4A
Basic Information
System of measurement
Metric
Weight
0.079 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
12 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
2077 lbf
Radial static load rating
1125 lbf
Limiting speed
85 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Heavy / Class D
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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7005 ACDGD/P4A Bearing Product Overview & Core Advantages
The 7005 ACDGD/P4A is a single row angular contact ball bearing engineered for the most demanding precision applications. This bearing is distinguished by its P4A super precision tolerance class and Heavy preload (Class D), delivering exceptional rotational accuracy, rigidity, and system stability. Its optimized 25° contact angle is specifically designed to support high combined loads, handling significant axial loads in one direction alongside radial loads. As a Universal Matchable (SU) bearing, it can be mounted in tandem with other identical bearings to create a pre-loaded set, making it an ideal choice for high-speed spindles and other high-performance machinery where uncompromising precision and high rigidity are paramount.
7005 ACDGD/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 7005 ACDGD/P4A provides a complete technical specification. Below is a detailed breakdown:
| Code Segment | Interpretation | Technical Significance |
|---|---|---|
| 7005 | Basic Designation | Indicates a metric, single row angular contact ball bearing with a 25mm bore, 47mm OD, and 12mm width. |
| AC | Angular Contact | The fundamental design, optimized for combined loads. |
| D | Heavy Preload | Specifies a Heavy (Class D) preload, which maximizes system rigidity and minimizes axial/radial runout under operational conditions. |
| GD | Grease Type & Quantity | Indicates the bearing is factory lubricated with a specific grease type and quantity suitable for its operational range. |
| P4A | Tolerance Class | Denotes a super precision tolerance grade, ensuring extremely tight dimensional and running accuracy for the most critical applications. |
7005 ACDGD/P4A Bearing Structural Features & Performance Benefits
- Super Precision & High Rigidity: The P4A tolerance class and Heavy preload work in concert to provide unmatched running accuracy and stiffness. This combination is critical for applications requiring minimal deflection and vibration, directly contributing to superior finish quality and positional accuracy.
- Optimized Load Capacity: The 25° contact angle and robust internal geometry provide an excellent balance, offering high capacity for both radial and one-direction axial combined loads.
- High-Speed Capability: The lightweight phenolic cage ensures low inertia and excellent performance at high rotational speeds, with a limiting speed of 85,000 rpm. The phenolic material also offers superior strength and lubrication compatibility.
- Universal Matching Design (SU): This bearing is manufactured to Universal Matchable (SU) standards, allowing multiple bearings to be mounted together in a stack without the need for selective assembly. This simplifies the creation of duplex or triplex sets to achieve specific preload and stiffness requirements.
- Premium Materials: Constructed from chrome steel for both rings and balls, the bearing ensures high durability, wear resistance, and a long operational life under demanding conditions.
7005 ACDGD/P4A Bearing Typical Application Areas
The 7005 ACDGD/P4A is designed for high-performance machinery where precision, speed, and rigidity are non-negotiable. Key application sectors include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for CNC engraving and high-speed machining.
- Robotics: High-accuracy joints and rotary actuators.
- Medical Equipment: Dental handpieces and laboratory instrumentation.
