S7019 CD/HCP4ATBTB
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7019 CD/HCP4ATBTB
Basic Information
System of measurement
Metric
Weight
3.04 kg
Tolerance class
P4A
Seal type
Sealed
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
72 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
39150 lbf
Radial static load rating
54000 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Grease
Matched arrangement
Triplex Back-to-Back (TBT)
Number of bearings in matched set
3
Universal matching bearing
No (Standard)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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S7019 CD/HCP4ATBTB Bearing Product Overview & Core Advantages
The S7019 CD/HCP4ATBTB is a super-precision angular contact ball bearing configured as a triplex back-to-back (TBT) matched set. Engineered for the most demanding applications, this bearing delivers exceptional rotational accuracy, high system rigidity, and superior high-speed performance. Its primary advantage lies in its ability to handle combined loads (radial and axial) simultaneously with outstanding stability, making it an ideal choice for high-precision spindles requiring maximum stiffness and minimal runout.
S7019 CD/HCP4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7019 | Basic bearing series, indicating a 15° contact angle and specific internal geometry for high-speed operation. |
| CD | Indicates a special internal design and clearance optimized for high-precision applications. |
| HC | Hybrid Ceramic: Denotes the use of ceramic balls, which reduce centrifugal forces, lower operating temperatures, and extend bearing life at high speeds. |
| P4A | The tolerance class, signifying extremely high precision levels for runout and dimensional accuracy, superior to standard ABEC 7/P4. |
| TBT | Triplex Back-to-Back: Specifies a matched set of three bearings arranged in a back-to-back configuration. This provides maximum moment stiffness and system stability. |
S7019 CD/HCP4ATBTB Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces weight and inertial forces, enabling higher limiting speeds and improved durability. Ceramic's non-conductive properties also help prevent electrical arcing damage.
- Triplex Back-to-Back (TBT) Arrangement: This matched set of three bearings is pre-loaded to a Light / Class B specification, creating an exceptionally high rigidity system that is highly resistant to moment loads and deflection, ensuring precise tool or workpiece positioning.
- Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent guidance and stability at high rotational speeds, contributing to smooth operation and reduced vibration.
- Super-Precision P4A Tolerances: Manufactured to the tightest dimensional and running accuracy standards, this bearing guarantees minimal vibration and superior positional accuracy for the most critical spindle applications.
- Pre-Lubricated & Sealed: The bearing is factory-filled with high-performance grease and is sealed, offering a maintenance-free solution within its specified temperature range (-30°C to 110°C).
S7019 CD/HCP4ATBTB Bearing Typical Application Areas
This high-performance triplex bearing set is specifically designed for applications where the ultimate in precision, speed, and rigidity is required. Key industries and machinery include:
- High-Speed Machine Tool Spindles: CNC milling centers, grinding spindles, and jig borers.
- Precision Grinding Applications: Internal and external grinding machine spindles.
- High-Frequency Motorized Spindles: Used in PCB drilling, precision engraving, and dental machining.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
