S71903 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71903 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.015 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
17 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
30 mm
Outside diameter tolerance
-0.005mm to 0
Width
7 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
14
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
893 lbf
Radial static load rating
450 lbf
Limiting speed
56 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:
$ 172.95
/ each
In Stock
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S71903 ACD/HCP4A Bearing Product Overview & Core Advantages
The S71903 ACD/HCP4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and performance. Engineered to accommodate combined loads (radial and axial loads simultaneously), this bearing features a 25° contact angle for optimal axial load capacity. Its compact design, with a 7 mm width, makes it ideal for space-constrained, high-speed applications. Manufactured to a P4 (ABEC-7) tolerance class, it ensures superior running accuracy and rotational stability, providing high rigidity and reliable operation in demanding environments.
S71903 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S71903 ACD/HCP4A is decoded as follows:
- S7: High-precision bearing series
- 1903: Dimension series (19: width series, 03: bore code; 17mm bore, 30mm OD)
- A: 25° contact angle
- CD: Polymer cage (Phenolic), universal design
- HC: Hybrid Ceramic (Ceramic balls with steel rings)
- P4: P4 tolerance class (ABEC-7)
- A: Preload designation
S71903 ACD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: Features ceramic balls and chrome steel rings. This reduces weight, minimizes friction, and enables higher limiting speeds (56,000 rpm) while providing superior resistance to wear and thermal expansion.
- Phenolic Cage: The polymer cage offers excellent strength-to-weight ratio, reduced centrifugal forces, and is suitable for high-speed operation, contributing to the bearing's overall high-speed performance.
- Precision & Rigidity: Built to P4 tolerance and supplied with a specific preload, this bearing delivers high rigidity, minimal runout, and precise shaft positioning, which is critical for spindle applications.
- Sealed & Lubricated: The sealed design retains factory-applied lubricant and protects against contamination, ensuring long-term, maintenance-free operation within the specified temperature range (-30°C to 110°C).
S71903 ACD/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for:
- Machine Tool Spindles
- High-Speed CNC Machining Centers
- Precision Grinding Spindles
- High-Frequency Motors
- Robotic Drives and Arms
- Medical and Dental Equipment
- Aerospace Instrumentation
