S71908 ACDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71908 ACDGA/P4A
Basic Information
System of measurement
Metric
Weight
0.11 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
62 mm
Outside diameter tolerance
-0.004mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2632 lbf
Radial static load rating
1800 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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S71908 ACDGA/P4A Bearing Product Overview & Core Advantages
The S71908 ACDGA/P4A is a super-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. As a single-row bearing with a 25° contact angle, it excels at handling combined radial and axial loads simultaneously. Manufactured to P4A tolerance class, it guarantees ultra-precise running accuracy and dimensional stability. Its compact design, featuring a phenolic cage and pre-filled grease, makes it ideal for high-speed spindle applications and other high-reliability machinery where minimal vibration and long service life are critical.
S71908 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 719 | High-precision angular contact ball bearing series. |
| 08 | Bore diameter code (40 mm). |
| AC | 25° contact angle. |
| D | Optimized internal geometry for high-speed operation. |
| GA | Preload classification: Extra light (Class A). |
| P4A | Tolerance class superior to ABEC 7, ensuring extremely tight dimensional and running accuracy. |
S71908 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of a lightweight phenolic resin cage, a 25° contact angle, and optimized internal design (D) enables a high limiting speed of 41,000 rpm, making it a premier high-speed bearing.
- Exceptional Rigidity and Load Capacity: The single-row design with a 25° contact angle provides excellent rigidity and can support significant combined loads (Radial dynamic load: 2632 lbf, Static load: 1800 lbf).
- Super-Precision Performance: Manufactured to P4A tolerance class with extremely tight bore, OD, and width tolerances, this bearing ensures minimal runout and vibration for superior operational accuracy.
- Universal Matching (SU): As a Universal Matchable bearing, two S71908 ACDGA/P4A bearings can be universally paired in a back-to-back (DB) or face-to-face (DF) arrangement to handle complex load conditions, enhancing system stability and load distribution.
- Ready-to-Install: The bearing is pre-lubricated with grease, suitable for a temperature range of -30°C to 110°C, facilitating easy installation and immediate operation.
S71908 ACDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors: Spindles for CNC machinery.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
- Aerospace Instrumentation: Gyroscopes and navigation systems.
