7017 ACD/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7017 ACD/P4ADBA
Basic Information
System of measurement
Metric
Weight
1.79 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
85 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
130 mm
Outside diameter tolerance
-0.004mm to 0
Width
44 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
14.288 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
23400 lbf
Radial static load rating
27450 lbf
Limiting speed
17 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
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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Product Overview and Core Advantages
The 7017 ACD/P4ADBA is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This back-to-back (DB) matched pair configuration is engineered to handle combined loads—significant radial and bidirectional axial loads simultaneously. Manufactured to P4A tolerance class, it delivers superior running accuracy and rotational precision. The extra light preload (Class A) ensures minimal deflection under operational stresses, making it ideal for high-speed spindles and other high-rigidity applications where stability is paramount.
7017 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7017 | Basic bearing designation: 85 mm bore, 130 mm OD, 44 mm width. |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| D | Duplex arrangement, indicating a pre-matched set of two bearings. |
| P4A | High-Precision Tolerance Class, specifying extremely tight dimensional and running accuracy limits. |
| DB | Back-to-Back mounting arrangement, providing high moment rigidity and stability. |
Structural Features and Performance Benefits
- High Rigidity and Stability: The duplex back-to-back (DB) design creates a wide, rigid support system that effectively resists moment loads and shaft deflection, crucial for maintaining precision under heavy combined loads.
- Superior Load Capacity: With a 25° contact angle and robust construction, this bearing excels at carrying both high radial loads (23,400 lbf dynamic) and substantial bidirectional axial loads simultaneously.
- Optimized High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 17,000 rpm. The open design allows for efficient lubrication management.
- Precision Engineering: Conforming to P4A tolerance class and featuring tight bore/OD tolerances, this bearing ensures minimal runout and vibration, which is essential for high-speed and high-precision applications.
- Durable Construction: Manufactured from chrome steel for both rings and balls, the bearing offers high fatigue life and wear resistance.
7017 ACD/P4ADBA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers where precision, rigidity, and speed are critical.
- Precision Gearboxes: Applications requiring accurate shaft positioning and high load capacity.
- High-Frequency Motors and Spindles: For CNC machining, PCB drilling, and other high-RPM industrial equipment.
- Medical and Laboratory Equipment: Centrifuges and other precision instruments demanding smooth, quiet, and accurate rotation.
- Robotics and Automation: Rotary joints and arm assemblies where compact, high-stiffness bearing arrangements are needed.
