7019 CD/HCP4AQBCA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7019 CD/HCP4AQBCA
Basic Information
System of measurement
Metric
Weight
4.01 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
145 mm
Outside diameter tolerance
-0.004mm to 0
Width
96 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
48600 lbf
Radial static load rating
72000 lbf
Limiting speed
17 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Quadruplex Back-to-Back (QBC)
Number of bearings in matched set
4
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1733.9
/ each
In Stock
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7019 CD/HCP4AQBCA Bearing Product Overview & Core Advantages
The **7019 CD/HCP4AQBCA** is a **super-precision angular contact ball bearing** configured as a **Quadruplex Back-to-Back (QBC) matched set**. Engineered for the most demanding applications, this bearing arrangement delivers exceptional **system rigidity** and stability under complex **combined loads**, including radial, axial, and moment loads. The use of **ceramic balls** significantly reduces centrifugal forces, enabling superior **high-speed performance** and extended service life. With a **P4A tolerance class**, it guarantees the utmost **running accuracy** for critical machinery requiring the highest levels of precision and reliability.
7019 CD/HCP4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
The model number 7019 CD/HCP4AQBCA is decoded as follows:
- 7019: Basic bearing series, with a 95 mm bore and 145 mm outside diameter.
- C: 15° nominal contact angle.
- D: Indicates a duplex (two-bearing) set. In this context, it is a building block for the quadruplex set.
- HC: Hybrid Ceramic, signifying ceramic balls with steel rings.
- P4A: Denotes an ultra-precision tolerance class superior to ABEC 7 (P4), with specific running accuracy requirements.
- QBC: Quadruplex Back-to-Back arrangement. This specifies that four bearings are supplied as a pre-matched set in a back-to-back configuration.
7019 CD/HCP4AQBCA Bearing Structural Features & Performance Benefits
- Unmatched Rigidity and Stability: The Quadruplex Back-to-Back (QBC) arrangement creates an extremely stiff bearing system that effectively resists moment loads and shaft deflection, which is critical for maintaining precision under heavy combined loads.
- Superior High-Speed Capability: The hybrid ceramic construction (ceramic balls with steel rings) is a key performance differentiator. Ceramic balls are lighter, reducing centrifugal forces, and have a lower coefficient of thermal expansion, minimizing preload variation at high speeds. This, combined with the lightweight phenolic cage, allows the bearing to achieve its high limiting speed of 17,000 rpm.
- Enhanced Load Capacity: The quadruplex design multiplies the load-carrying capacity of a single bearing. With a dynamic load rating of 48,600 lbf and a static load rating of 72,000 lbf, the set is built to handle significant radial and bidirectional axial loads.
- Ultra-Precision Operation: Manufactured to P4A tolerance class and an Extra light (Class A) preload, this set ensures minimal runout and vibration, delivering the smooth, accurate rotation required for the highest levels of machining and performance.
7019 CD/HCP4AQBCA Bearing Typical Application Areas
This high-performance bearing set is specifically designed for the most advanced and demanding machinery, including:
- High-Speed Machine Tool Spindles (e.g., for milling, grinding, and drilling)
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Aerospace and Defense Systems
- High-Performance Pumps and Compressors
