S71908 CD/P4ADGA
Sealed Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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S71908 CD/P4ADGA Bearing Product Overview & Core Advantages
The S71908 CD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. As a double row bearing, it can simultaneously support substantial combined loads—both radial and bidirectional axial loads—within a compact design envelope. Manufactured to the stringent P4A tolerance class, it guarantees superior running accuracy and high system rigidity. Its extra light preload (Class A) ensures smooth, quiet operation with minimal heat generation, making it an ideal choice for high-speed spindles and other precision machinery.
S71908 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
- S7: High-precision bearing series with a 15° contact angle.
- 1908: Standard dimension series; 40 mm bore, 62 mm OD, 24 mm width.
- CD: Double row angular contact ball bearing with a 15° contact angle.
- P4A: High-precision tolerance class exceeding ABEC 7, with enhanced running accuracy requirements.
- DG: The bearing is filled with a grease lubricant.
- A: Denotes Universal Matchable (SU) design. Two bearings can be mounted in any arrangement (back-to-back, face-to-face, or tandem) without preload adjustment.
S71908 CD/P4ADGA Bearing Structural Features & Performance Benefits
The performance of the S71908 CD/P4ADGA is a direct result of its advanced engineering:
- High Rigidity & Load Capacity: The double row design provides superior radial and axial stiffness, enabling stable performance under combined loads. With a dynamic load rating of 4478 lbf, it handles demanding operational stresses effectively.
- Precision & High-Speed Operation: The phenolic resin cage offers excellent dimensional stability and low friction, contributing to smooth operation at limiting speeds up to 41,000 rpm. The P4A tolerance class ensures minimal runout and vibration.
- Universal Matching & Simplified Mounting: The Universal Matchable (SU) feature allows two bearings to be universally paired, simplifying installation and providing flexibility in achieving the desired preload and rigidity in the application.
- Optimized for Longevity: Constructed from chrome steel for both rings and balls, the bearing ensures high durability and wear resistance. The pre-applied grease lubrication is suitable for a temperature range of -30°C to 110°C.
S71908 CD/P4ADGA Bearing Typical Application Areas
This precision bearing is engineered for high-performance applications across various industries, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices and optical equipment.
- High-Frequency Motors and Spindles: Where high rotational accuracy and speed are critical.
- Medical Equipment: Dental handpieces and small surgical tools.
- Robotics: Precision joints and arm linkages.
