7216 ACD/P4ADBC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7216 ACD/P4ADBC
Basic Information
System of measurement
Metric
Weight
2.92 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
80 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
140 mm
Outside diameter tolerance
-0.004mm to 0
Width
52 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
17.462 mm
Ball quantity
17
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
29925 lbf
Radial static load rating
32175 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
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
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In Stock
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7216 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 7216 ACD/P4ADBC is a precision duplex angular contact ball bearing configured in a back-to-back (DB) arrangement. Engineered for applications demanding exceptional rotational accuracy and rigidity, this pre-matched set is designed to accommodate combined loads—significant radial loads and axial loads in both directions. Its moderate preload (Class C) ensures stable operation, minimizes deflection, and is ideal for high-precision, high-reliability machinery. Manufactured to a P4A tolerance class, it guarantees superior running accuracy for demanding applications.
7216 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
The model number 7216 ACD/P4ADBC is decoded as follows:
- 7216: Basic series designation (70mm bore, medium section).
- A: Signifies a 25° contact angle, optimized for carrying higher axial loads.
- C: Indicates the bearing has a Moderate Preload (Class C) applied.
- D: Denotes that the bearing is part of a Duplex (matched pair) set.
- /P4A: Specifies a very high tolerance class (superior to ABEC 7), ensuring extreme dimensional and running accuracy.
- DB: Defines the specific matched arrangement as Back-to-Back. This configuration provides high moment rigidity and is excellent for applications with overturning moments.
- C: (In the P4ADBC suffix) Confirms the Moderate Preload (Class C) on the matched set.
7216 ACD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide effective spread, significantly increasing the system's resistance to moment loads and providing exceptional operational stiffness.
- Superior Load Capacity: The 25° contact angle and robust construction enable the bearing to handle substantial combined radial and axial loads from both directions simultaneously.
- Precision Performance: Manufactured to a P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for applications requiring high rotational accuracy.
- Optimized High-Speed Capability: The lightweight and durable phenolic resin cage reduces centrifugal forces, contributes to lower operating temperatures, and supports a high limiting speed of 28,000 rpm.
- Preload & Reliability: The factory-set moderate preload (Class C) eliminates internal clearance, ensuring precise shaft positioning, reducing noise and vibration, and enhancing overall bearing life under complex loading conditions.
7216 ACD/P4ADBC Bearing Typical Application Areas
This high-precision duplex bearing set is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and High-Frequency Motors.
- Industrial Pumps and Compressors.
- Medical Equipment and Analytical Instruments.
- Robotic Arm Joints and other automation components.
