7219 ACD/P4ADBC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7219 ACD/P4ADBC
Basic Information
System of measurement
Metric
Weight
5.4 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
95 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
170 mm
Outside diameter tolerance
-0.004mm to 0
Width
64 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
23.812 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
48600 lbf
Radial static load rating
51300 lbf
Limiting speed
15 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
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7219 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 7219 ACD/P4ADBC is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched pair arrangement in a back-to-back (DB) configuration is engineered to withstand combined radial and axial loads from both directions simultaneously. Manufactured to the stringent P4A tolerance class, it offers superior running accuracy, making it ideal for high-precision, high-rigidity systems. The pre-lubricated design and phenolic cage contribute to reliable, long-term performance in high-speed operations.
7219 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7219 | Basic bearing series, indicating a 95 mm bore, 170 mm OD, and 64 mm width. |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| D | Duplex (two bearings supplied as a matched set). |
| DB | Back-to-Back mounting arrangement, providing high moment rigidity. |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards for enhanced running accuracy. |
| C | Moderate preload (Class C), optimized for high rigidity and reduced deflection under load. |
7219 ACD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide effective spread, significantly increasing the system's resistance to moment loads and operational deflection, ensuring exceptional positional accuracy.
- Superior Load Capacity: With a 25° contact angle and a dynamic load rating of 48,600 lbf, this bearing is engineered to handle significant combined radial and axial loads from both directions efficiently.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel balls and raceways enable smooth operation up to a limiting speed of 15,000 rpm.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on bore, OD, and width, this bearing guarantees low vibration and high running accuracy for critical applications.
7219 ACD/P4ADBC Bearing Typical Application Areas
This bearing is specifically designed for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: For CNC machining centers, grinders, and lathes requiring high-speed precision and minimal runout.
- High-Frequency Spindles: In PCB drilling and routing equipment.
- Precision Gearboxes: Supporting shafts subjected to complex loads in industrial robotics and automation.
- Pumps and Compressors: Where reliable operation under combined loads is essential.
