S71908 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71908 CD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.1 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
62 mm
Outside diameter tolerance
-0.007mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
21
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2790 lbf
Radial static load rating
1912 lbf
Limiting speed
26 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:
$ 376.88
/ each
In Stock
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S71908 CD/HCP4A Bearing Product Overview & Core Advantages
The S71908 CD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and rigidity. This sealed bearing features a single, preloaded arrangement and is manufactured to a P4 (ABEC-7) tolerance class, ensuring minimal runout and superior performance. Its core advantage lies in its ability to support combined loads (radial and axial) simultaneously with high stability, making it an ideal choice for high-speed spindles and precision machinery where reliability is critical.
S71908 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model designation S71908 CD/HCP4A provides detailed technical specifications:
- S7: Denotes a series of high-precision angular contact ball bearings.
- 1908: Standard size designation (40mm bore, 62mm OD, 12mm width).
- CD: Signifies a 15° contact angle and a preloaded, duplex arrangement (in this case, a single bearing supplied as a matched set).
- HC: Indicates the use of Hybrid Ceramic components (Ceramic balls with a Chrome Steel ring).
- P4: Specifies the tolerance class (P4/ABEC-7), indicating very high manufacturing precision.
- A: Confirms the 15° contact angle.
S71908 CD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction and wear, enables operation at higher speeds, and provides extended service life, especially in challenging environments.
- Phenolic Resin Cage: This cage material offers excellent strength-to-weight ratio and operates smoothly with minimal friction at high rotational speeds, contributing to the bearing's limiting speed of 26,000 rpm.
- Preloaded Design (CD): The bearing is supplied with a preload, which eliminates internal clearance. This results in enhanced rigidity, precise shaft positioning, and improved system dynamic response.
- High Load Capacity: With a dynamic load rating of 2790 lbf and a static load rating of 1912 lbf, it reliably handles significant combined loads.
- Sealed & Lubricated for Life: The integrated seals retain lubricant and exclude contaminants, ensuring consistent performance and making the bearing maintenance-free within its specified temperature range of -30° to 110°C.
S71908 CD/HCP4A Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles
- High-Speed CNC Machining Centers
- Precision Grinding Spindles
- High-Frequency Motors
- Robotic Drives and Servo Motors
