S71915 ACB/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71915 ACB/HCP4ADBA
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
6.35 mm
Ball quantity
34
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4860 lbf
Radial static load rating
5625 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
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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S71915 ACB/HCP4ADBA Bearing Product Overview & Core Advantages
The S71915 ACB/HCP4ADBA is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This matched pair back-to-back (DB) arrangement provides superior stability and can accommodate combined loads (radial and axial loads from both directions simultaneously). Manufactured to ABEC 7 / P4A tolerance class and featuring ceramic balls and a phenolic cage, this bearing is engineered for high-speed operation, reduced friction, and extended service life in precision machinery.
S71915 ACB/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71915 | Precision angular contact ball bearing series with 75mm bore, 105mm OD, and 32mm width. |
| ACB | Angular Contact Bearing with a 25° contact angle. |
| HCP4A | Indicates the P4A tolerance class for ultra-precision and the specific internal design/clearance. |
| DBA | Signifies a Duplex Back-to-Back (DB) arrangement with an Extra Light (Class A) preload. |
S71915 ACB/HCP4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) mounting creates a rigid bearing system that effectively resists moment loads, making it ideal for applications requiring high shaft positioning accuracy.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic resin cage allows for significantly higher limiting speeds (28,000 rpm) and lower operating temperatures compared to all-steel equivalents.
- Enhanced Load Capacity: The 25° contact angle and duplex design provide excellent capacity for combined radial and axial loads.
- Precision & Longevity: Manufactured to P4A tolerance class for exceptional running accuracy. The sealed design with pre-applied grease lubrication protects against contamination and ensures reliable operation within the specified temperature range.
S71915 ACB/HCP4ADBA Bearing Typical Application Areas
This high-precision bearing is typically used in:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Rotary Tables
- High-Frequency Motors & Spindles
- Medical & Dental Equipment (e.g., high-speed handpieces)
- Aerospace & Defense Systems
