S71907 ACDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71907 ACDGB/HCP4A
Basic Information
System of measurement
Metric
Weight
0.068 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
35 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
55 mm
Outside diameter tolerance
-0.004mm to 0
Width
10 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2077 lbf
Radial static load rating
1395 lbf
Limiting speed
56 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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S71907 ACDGB/HCP4A Bearing Product Overview & Core Advantages
The S71907 ACDGB/HCP4A is a super-precision, single-row angular contact ball bearing engineered for applications demanding the highest levels of accuracy, rigidity, and speed. Its core advantage lies in its ability to support combined loads (simultaneous radial and axial loads) efficiently. Manufactured to an exceptionally tight P4A tolerance class and featuring a ceramic ball and phenolic cage construction, this bearing is optimized for superior performance in high-speed, high-rigidity spindle applications, offering extended service life and operational reliability.
S71907 ACDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S71907 ACDGB/HCP4A provides a detailed technical specification:
- S7: Indicates a series of bearings designed for high stiffness and precision.
- 1907: Denotes the size series, with a 35mm bore, 55mm outside diameter, and 10mm width.
- AC: Signifies a 25° contact angle, optimized for supporting high axial loads.
- D: Represents a "Universal Matchable" design, allowing for precise preload setting when mounted in pairs or sets.
- GB: Specifies a Light preload (Class B).
- HC: Denotes the use of Hybrid Ceramic balls (Silicon Nitride).
- P4A: Defines the tolerance class, which is superior to ABEC 7, ensuring extremely tight dimensional and running accuracy.
S71907 ACDGB/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The P4A tolerance class and Universal Matchable (SU) design ensure minimal runout and vibration, providing the stable, high-rigidity support required for ultra-precision machining and instrumentation.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage significantly lowers friction and temperature rise, enabling a high limiting speed of 56,000 rpm.
- Enhanced Load Capacity: The 25° contact angle is optimally designed to handle significant axial loads in one direction, as well as combined loads, making it ideal for spindle applications.
- Long-Term Reliability & Low Maintenance: The bearing is sealed and pre-lubricated with grease, protecting against contamination and providing long-term, maintenance-free operation within a temperature range of -30°C to 110°C.
S71907 ACDGB/HCP4A Bearing Typical Application Areas
This high-precision bearing is specifically designed for the most demanding applications, including:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Machining Centers
- PCB Drilling and Milling Spindles
- Advanced Robotic Drives
- Precision Medical and Dental Equipment
