7219 CDGB/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7219 CDGB/P4A
Basic Information
System of measurement
Metric
Weight
2.7 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
32 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
23.812 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
31050 lbf
Radial static load rating
27000 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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7219 CDGB/P4A Bearing Product Overview & Core Advantages
The 7219 CDGB/P4A is a single row angular contact ball bearing manufactured to ultra-precision P4A tolerance class. Engineered for applications demanding exceptional rotational accuracy and high-speed capability, this bearing is designed to accommodate primarily axial loads in one direction, as well as combined radial and axial loads. Its light preload (Class B) ensures minimal runout and smooth operation right from installation. The open design, combined with a phenolic cage and universal matching (SU) capability, makes it an ideal choice for high-precision spindles and other critical machinery where rigidity and precision are paramount.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7219 | Basic bearing series and size designation (95mm bore, 170mm OD, 32mm width). |
| C | Specifies a 15° contact angle, optimized for high-speed applications with significant axial loads. |
| DGB | Indicates a Universal Matchable (SU) bearing supplied with a Light preload (Class B). Two such bearings can be universally matched in a back-to-back (DB) or face-to-face (DF) arrangement. |
| P4A | Denotes an ultra-precision tolerance class with enhanced running accuracy requirements beyond standard ABEC 7/P4. |
7219 CDGB/P4A Bearing Structural Features & Performance Benefits
- High Precision and Rigidity: Manufactured to P4A tolerance class with a light preload, this bearing provides exceptional running accuracy and system stiffness, minimizing deflection under load for superior machining or operational results.
- Optimized for High Speeds: The 15° contact angle and lightweight phenolic resin cage are engineered to reduce centrifugal forces and friction, enabling stable operation at the high limiting speed of 15,000 rpm.
- Superior Load Capacity: With a dynamic load rating of 31,050 lbf and a static load rating of 27,000 lbf, it reliably handles demanding combined loads.
- Universal Matching Capability (SU): The DGB suffix signifies that bearings are universally matchable. This allows for flexible mounting in pre-adjusted pairs (DB or DF) without selective assembly, simplifying installation and ensuring optimal preload and performance.
- Pre-lubricated for Immediate Use: The bearing comes pre-lubricated, ready for immediate installation and initial operation within its specified temperature range.
7219 CDGB/P4A Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for applications requiring high speed, rigidity, and accuracy, such as:
- Machine Tool Spindles (e.g., CNC machining centers, grinding spindles)
- High-Frequency Motors
- Precision Instrumentation
- Robotic Arm Drives
- Aerospace Control Systems
