7015 ACD/P4ATBTC
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7015 ACD/P4ATBTC
Basic Information
System of measurement
Metric
Weight
1.88 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
75 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
115 mm
Outside diameter tolerance
-0.004mm to 0
Width
60 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
20
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
24300 lbf
Radial static load rating
31500 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Triplex Back-to-Back (TBT)
Number of bearings in matched set
3
Universal matching bearing
No (Standard)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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7015 ACD/P4ATBTC Bearing Product Overview & Core Advantages
The 7015 ACD/P4ATBTC is a precision angular contact ball bearing configured as a triplex back-to-back (TBT) matched set. Engineered for applications demanding exceptional rotational accuracy and rigidity, this bearing arrangement excels at handling combined loads (radial and axial) from multiple directions simultaneously. Its P4A tolerance class ensures ultra-precise running characteristics, making it ideal for high-performance machinery where positioning accuracy and system stability are critical. The moderate preload (Class C) eliminates internal clearance, providing immediate response and enhanced stiffness under operational forces.
7015 ACD/P4ATBTC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7015 | Standard bearing series designation, indicating a 75 mm bore, 115 mm OD, and 20 mm nominal width per bearing. |
| ACD | Angular Contact design with a 25° contact angle, optimized for sustaining high axial loads. |
| P4A | Indicates a high-precision tolerance class with enhanced running accuracy and dimensional stability beyond ABEC 7 (P4) standards. |
| TBT | Specifies the Triplex Back-to-Back matched arrangement, consisting of three bearings pre-set for maximum moment stiffness and operational precision. |
| C | Denotes a Moderate Preload level, which increases system rigidity and minimizes deflection under load. |
7015 ACD/P4ATBTC Bearing Structural Features & Performance Benefits
- Superior Rigidity and Load Capacity: The triplex back-to-back configuration creates a highly rigid bearing system capable of withstanding complex combined loads and significant overturning moments. The 25° contact angle is optimized for high axial load carrying capacity in both directions.
- High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio, reduced centrifugal forces, and smooth operation at the limiting speed of 28,000 rpm. This makes it suitable for demanding high-speed applications.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and superior rotational accuracy for precision machinery.
- Durable Construction: Components made from chrome steel (rings and balls) provide high hardness, wear resistance, and long service life. The set comes pre-lubricated for immediate operation within a temperature range of -30°C to 110°C.
7015 ACD/P4ATBTC Bearing Typical Application Areas
This precision bearing set is specifically designed for high-performance applications requiring extreme accuracy and rigidity, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Industrial robotics and automation systems.
- High-Frequency Spindles: PCB drilling and routing machines.
- Aerospace Test Equipment: Gyroscopes and precision positioning systems.
