S71905 CE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71905 CE/HCP4A
Basic Information
System of measurement
Metric
Weight
0.038 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.005mm to 0
Outside diameter
42 mm
Outside diameter tolerance
-0.006mm to 0
Width
9 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
16
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1186 lbf
Radial static load rating
630 lbf
Limiting speed
58 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:
$ 212.3
/ each
In Stock
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S71905 CE/HCP4A Bearing Product Overview & Core Advantages
The S71905 CE/HCP4A is a single-row angular contact ball bearing engineered for applications demanding exceptional precision and high-speed performance. This metric bearing is distinguished by its P4 (ABEC-7) tolerance class, ensuring ultra-precise rotational accuracy. A key advantage is its ability to accommodate combined loads, efficiently handling both radial and axial forces in one direction. The combination of a ceramic ball material and a phenolic cage contributes to lower friction, higher limiting speeds, and extended service life, making it an ideal choice for high-reliability, high-RPM machinery.
S71905 CE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Indicates a series of high-precision angular contact bearings. |
| 1905 | Specifies the bearing size: 05 (25mm) bore, 19 (42mm) outside diameter, and a narrow width series. |
| CE | Specifies a 15° contact angle and internal design optimized for high-speed operation. |
| HC | Denotes the use of hybrid ceramic balls (Silicon Nitride). |
| P4A | Specifies the tolerance class P4 (ABEC-7) with specific running accuracy requirements. |
S71905 CE/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed & Low Friction: The ceramic balls are significantly lighter and harder than steel, reducing centrifugal forces and wear. This, combined with the lightweight phenolic cage, enables a very high limiting speed of 58,000 rpm.
- Precision & Rigidity: Manufactured to P4 tolerance with tight dimensional control on the bearing bore and outside diameter, this bearing provides superior running accuracy and high rigidity for precise shaft positioning.
- Optimized Load Capacity: The 15° contact angle is engineered to handle substantial axial loads in one direction while also supporting significant radial loads, making it suitable for combined load applications.
- Pre-Lubricated & Sealed: The bearing comes lubricated and sealed, protecting against contamination and providing maintenance-free operation within its specified temperature range.
S71905 CE/HCP4A Bearing Typical Application Areas
This high-precision, high-speed bearing is ideally suited for demanding applications such as:
- Machine Tool Spindles (High-speed milling and grinding)
- Precision Robotics and Automation Arms
- High-Frequency Spindles for PCB drilling
- Turbochargers and other high-RPM auxiliary equipment
- Medical and Dental Handpieces
