7018 CDTP/HCP4B
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7018 CDTP/HCP4B
Basic Information
System of measurement
Metric
Weight
1.01 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
90 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
140 mm
Outside diameter tolerance
-0.009mm to 0
Width
24 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
20
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
17842 lbf
Radial static load rating
17212 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 922.05
/ each
In Stock
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7018 CDTP/HCP4B Bearing Product Overview & Core Advantages
The 7018 CDTP/HCP4B is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single-row bearing is distinguished by its P4 (ABEC-7) tolerance class and ceramic ball construction, enabling superior high-speed capability and extended service life. It is preloaded and comes pre-lubricated, making it ready for immediate installation in high-rigidity systems that must handle combined radial and axial loads.
7018 CDTP/HCP4B Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7018 | Standard bearing series designation, indicating a 90mm bore, 140mm OD, and 24mm width. |
| CD | A 15° contact angle and optimized internal geometry for high-speed operation. |
| TP | Indicates a phenolic (polyamide) cage, which is lightweight and ideal for high-speed applications. |
| HC | Signifies the use of hybrid ceramic balls (silicon nitride), which reduce friction, heat generation, and wear. |
| P4 | Denotes a super-precision tolerance class (equivalent to ABEC-7), ensuring minimal runout and vibration for ultra-precise positioning. |
7018 CDTP/HCP4B Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, allowing for a higher limiting speed (11,000 rpm). This construction also provides electrical insulation, reduced thermal expansion, and superior performance in lubricant-starved conditions.
- High Rigidity & Preload: The bearing is supplied with a preload, which eliminates internal clearance. This results in greater system rigidity, improved rotational accuracy, and reduced noise and vibration under load.
- Optimized for Combined Loads: The 15° contact angle is engineered to support significant combined radial and axial loads simultaneously, making it a robust choice for complex loading scenarios.
- Lightweight Phenolic Cage: The TP cage offers excellent guidance for the ceramic balls with minimal friction, contributing to the bearing's high-speed performance and operational stability.
7018 CDTP/HCP4B Bearing Typical Application Areas
This high-performance bearing is ideally suited for applications where precision, speed, and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Aerospace & Defense: Gyroscopes, radar systems, and auxiliary power units (APUs).
- High-Frequency Motors and Spindles: PCB drilling spindles and electric motor shafts.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
