S71907 ACDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71907 ACDGA/P4A
Basic Information
System of measurement
Metric
Weight
0.077 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
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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S71907 ACDGA/P4A Bearing Product Overview & Core Advantages
The S71907 ACDGA/P4A is a super-precision angular contact ball bearing designed for applications demanding the highest levels of accuracy, rigidity, and speed. As a single bearing with a 25° contact angle and extra light preload (Class A), it excels at handling combined loads—simultaneously supporting high radial loads and substantial axial loads in one direction. Manufactured to the stringent P4A tolerance class, it ensures exceptional running accuracy, making it ideal for high-speed spindles and other precision machinery where minimal runout and vibration are critical.
S71907 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S71907 ACDGA/P4A provides a detailed technical specification:
- S: Denotes a super-precision bearing series.
- 7: Identifies the bearing as an angular contact ball bearing.
- 1907: Specifies the size series (19) and bore diameter (07 = 35 mm).
- AC: Angular Contact design with a 25° contact angle.
- D: Signifies the bearing is part of a Universal Matchable (SU) set, allowing for precise preload configuration when mounted in pairs or groups.
- GA: Indicates a specific internal clearance and preload grade (Extra light preload / Class A).
- P4A: The tolerance class, specifying dimensional and running accuracy superior to standard ABEC 7 (P4) levels.
S71907 ACDGA/P4A Bearing Structural Features & Performance Benefits
The design of the S71907 ACDGA/P4A translates directly into superior performance:
- High Rigidity and Load Capacity: The 25° contact angle and robust construction provide high rigidity, enabling the bearing to effectively manage combined radial and axial loads.
- Super-Precision & High-Speed Performance: Manufactured to P4A tolerances with a phenolic resin cage, this bearing ensures minimal vibration and stable operation at high rotational speeds, with a limiting speed of 56,000 rpm.
- Optimized for Matched Sets: As a Universal Matchable (SU) bearing, it can be supplied in sets of up to 4 bearings (as per the specification) that are manufactured to work together, simplifying the assembly of preloaded duplex or triplex arrangements for maximum system stiffness.
- Sealed and Pre-Lubricated: The sealed design with grease lubrication protects against contamination and provides long-term, maintenance-free operation within a temperature range of -30°C to 110°C.
S71907 ACDGA/P4A Bearing Typical Application Areas
This high-precision bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and other high-RPM electric motors.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
- Robotics: High-accuracy joints and arm assemblies.
