S71915 CDGB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71915 CDGB/P4A
Basic Information
System of measurement
Metric
Weight
0.36 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
75 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
105 mm
Outside diameter tolerance
-0.004mm to 0
Width
16 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
8055 lbf
Radial static load rating
8438 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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S71915 CDGB/P4A Bearing Product Overview & Core Advantages
The S71915 CDGB/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. As a single bearing that is Universal Matchable (SU), it can be paired with a second bearing to form a precisely preloaded set, offering superior stiffness and runout control. Its P4A tolerance class ensures extremely tight dimensional and running accuracy, making it ideal for high-reliability spindles and precision machinery where handling combined loads is critical.
S71915 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Stainless Steel (AISI 440C) bearing rings and balls |
| 7 | Angular Contact Bearing |
| 19 | Bore Diameter Series (Indicating a 75mm bore) |
| 15 | Outside Diameter and Width Series |
| C | 15° Contact Angle |
| DGB | Universal Matchable bearing designed for "Back-to-Back" (DB) mounting. The "GB" suffix indicates a specific preload group (Light / Class B). |
| P4A | Super Precision Tolerance Class, exceeding ABEC 7/ISO P4 standards. |
S71915 CDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design with a 15° contact angle enables the bearing to efficiently support combined radial and axial loads simultaneously. The Light preload (Class B) eliminates internal clearance, resulting in significantly increased system stiffness and precise shaft positioning.
- Superior High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and ensures stable operation at the high limiting speed of 28,000 rpm. This makes it an excellent high-speed bearing for demanding spindle applications.
- Precision and Stability: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration. The universal matching (SU) feature allows for simplified assembly of preloaded pairs without selective matching, ensuring consistent, high-performance results.
- Corrosion Resistance: Constructed from stainless steel (AISI 440C), the bearing offers enhanced resistance to corrosion, which is vital for applications in challenging environments or where wash-downs are common.
S71915 CDGB/P4A Bearing Typical Application Areas
This precision bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors: Spindles for electric motors requiring high rotational accuracy.
- Medical and Dental Equipment: High-speed handpieces and scanners.
- Aerospace Instrumentation: Gyroscopes and other precision navigation systems.
