S71915 ACD/P4ADBC
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71915 ACD/P4ADBC
Basic Information
System of measurement
Metric
Weight
0.72 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
32 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
12442 lbf
Radial static load rating
15975 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Grease
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Moderate / Class C
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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S71915 ACD/P4ADBC Bearing Product Overview & Core Advantages
The S71915 ACD/P4ADBC is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched set features a back-to-back (DB) arrangement with a moderate preload (Class C), enabling it to withstand combined radial and axial loads from both directions simultaneously. Manufactured to P4A tolerance class, it offers superior running accuracy and rotational precision. The combination of a phenolic cage and factory-applied grease lubrication ensures reliable high-speed performance and long service life in compact installations.
S71915 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
The model number S71915 ACD/P4ADBC provides detailed technical specifications:
- S7: Indicates a series of high-precision angular contact ball bearings.
- 1915: Denotes the size series; 19 for the bore diameter code (75 mm) and 15 for the outer diameter and width series.
- ACD: Specifies the bearing type and arrangement. A signifies a 25° contact angle, C indicates a moderate preload, and D designates a duplex (two-bearing) set.
- DB: Stands for Duplex Back-to-Back arrangement, which provides high rigidity and moment load capacity.
- P4A: The tolerance class, signifying very high dimensional and running accuracy, superior to standard ABEC 7 (P4) levels.
- Sealed & Grease Lubricated: The bearing is sealed and pre-lubricated with grease for maintenance-free operation.
S71915 ACD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a rigid bearing system that effectively resists moment loads and supports heavy combined loads. The 25° contact angle is optimized for sustaining significant axial loads in both directions.
- Precision & Speed: Built to a P4A tolerance class with a phenolic cage, this bearing achieves exceptionally smooth operation and a high limiting speed of 28,000 rpm. The precise bore and outside diameter tolerances ensure perfect fit and system integrity.
- Durability & Maintenance-Free Operation: The sealed design and factory-applied grease lubrication protect against contamination and provide long-lasting performance within a temperature range of -30°C to 110°C, eliminating the need for re-lubrication.
- Optimized Internal Geometry: With 26 high-grade chrome steel balls of 9.525 mm diameter, the bearing provides a high dynamic load rating of 12,442 lbf and a static load rating of 15,975 lbf.
S71915 ACD/P4ADBC Bearing Typical Application Areas
This bearing is engineered for high-performance machinery where precision, rigidity, and speed are critical. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and Industrial Pumps.
- High-Frequency Motors and Compressors.
- Medical Equipment and Aerospace Instrumentation.
- Robotic Arms and other automation components requiring accurate angular positioning.
