S71908 CE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71908 CE/HCP4ADGA Bearing Product Overview & Core Advantages
The S71908 CE/HCP4ADGA is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This sealed, universally matchable bearing is engineered to accommodate combined loads (radial and axial) simultaneously. Its ceramic ball construction and P4A super-precision tolerance class make it ideal for high-speed, high-rigidity applications where minimal runout and thermal stability are critical. The pre-filled high-performance grease ensures long-term, maintenance-free operation.
Model Code Breakdown
- S7: High-precision bearing series
- 1908: Standard dimension series (19: width series, 08: bore diameter code for 40mm)
- CE: Ceramic balls (typically Silicon Nitride, Si3N4)
- HC: Phenolic (resin) cage
- P4A: Super-precision tolerance class (exceeding ABEC 7)
- ADGA: Universal matchable (SU designation) in a duplex set with Extra Light (A) preload and pre-filled grease
S71908 CE/HCP4ADGA Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The 15° contact angle and duplex universal match (SU) arrangement allow for precise axial positioning and high system rigidity when mounted in pairs. The P4A tolerance ensures extremely tight dimensional and running accuracy.
Enhanced Speed and Durability: The combination of a lightweight phenolic cage and low-density, hard ceramic balls significantly reduces centrifugal forces, enabling a high limiting speed of 41,000 rpm. Ceramic balls also offer superior resistance to wear and operate effectively with less lubrication.
Superior Load Capacity: Designed to handle significant combined loads, with a dynamic load rating of 3578 lbf and a static load rating of 2700 lbf.
Maintenance-Free Operation: The integral seals and factory-applied grease protect against contamination and provide reliable lubrication throughout the specified temperature range (-30°C to 110°C).
S71908 CE/HCP4ADGA Bearing Typical Application Areas
This high-performance bearing is ideally suited for:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors and Spindles
- Aerospace and Defense Instrumentation
- Medical and Dental Equipment
- Semiconductor Manufacturing Equipment
