S71907 ACB/P4ADGA
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71907 ACB/P4ADGA
Basic Information
System of measurement
Metric
Weight
0.16 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
20 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
25
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1755 lbf
Radial static load rating
1564 lbf
Limiting speed
56 X 1000 rpm
Lubrication
Grease
Matched arrangement
Universal Matchable (SU)
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
No drawings available at the moment, will be launched soon
In Stock
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S71907 ACB/P4ADGA Bearing Product Overview & Core Advantages
The S71907 ACB/P4ADGA is a precision double row angular contact ball bearing engineered for applications demanding exceptional accuracy and rigidity. Its design enables it to simultaneously handle combined loads—significant radial loads and bidirectional axial loads. Manufactured to the exacting P4A tolerance class, this bearing offers superior running accuracy and is universally matchable (SU), allowing for flexible mounting arrangements in preloaded sets. The combination of a phenolic cage and factory-applied grease lubrication ensures reliable high-speed performance and long service life in demanding operational environments.
S71907 ACB/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number S71907 ACB/P4ADGA provides detailed technical specifications through its suffixes:
- S: Denotes a bearing with a bore diameter of 35mm in the 79 series.
- 7: Indicates the bearing type is Angular Contact.
- 1907: Specifies the dimensional series (19) and bore code (07 for 35mm).
- ACB: Signifies a 25° contact angle and specific internal design.
- P4A: Defines the tolerance class, indicating very high precision for both inner and outer rings.
- DGA: Specifies the universal matchable (SU) designation, meaning two bearings can be paired in any combination to achieve a specific preload.
S71907 ACB/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The double row design provides superior radial and axial stiffness, making it ideal for applications requiring high rigidity support. It is rated for a dynamic load of 1755 lbf and a static load of 1564 lbf.
- Precision High-Speed Operation: The lightweight phenolic cage and optimized internal geometry contribute to lower centrifugal forces, enabling a high limiting speed of 56,000 rpm. The standard grease lubrication is formulated for stable performance across this range.
- Exceptional Running Accuracy: Manufactured to P4A tolerance class with tight bore, outside diameter, and width tolerances, this bearing ensures minimal runout and vibration for precision spindles and machinery.
- Universal Matching Capability: The SU (Universal Matchable) feature allows any two bearings to be mounted together in a back-to-back, face-to-face, or tandem arrangement to achieve a pre-defined preload (in this case, Extra Light / Class A), simplifying inventory and assembly.
S71907 ACB/P4ADGA Bearing Typical Application Areas
This high-precision double row angular contact ball bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices and optical equipment.
- High-Frequency Motors and Spindles: Applications requiring low vibration and high rotational accuracy.
- Medical Equipment: Dental handpieces and small precision drives.
