7213 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7213 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.88 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
65 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
120 mm
Outside diameter tolerance
-0.008mm to 0
Width
23 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
15
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
14332 lbf
Radial static load rating
11475 lbf
Limiting speed
20 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 610.3
/ each
In Stock
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7213 ACD/HCP4A Bearing Product Overview & Core Advantages
The 7213 ACD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single bearing features a 25° contact angle and is supplied with a preload, delivering superior high rigidity and rotational accuracy. Its construction with a phenolic cage and ceramic balls enables outstanding high-speed performance, making it ideal for machine tool spindles and other precision machinery where reliability under combined loads is critical.
7213 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7213 | Basic bearing series, defining the bearing dimensions (65mm bore, 120mm OD, 23mm width). |
| ACD | Angular Contact Design with a 25° contact angle. |
| HCP4A | Hybrid Ceramic (Ceramic balls), P4 (ABEC-7) tolerance class, and a specific internal design (A-suffix) indicating a preloaded, high-precision bearing. |
7213 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Running Accuracy: The bearing is supplied with a preload, which eliminates internal clearance. This ensures high system stiffness, precise shaft positioning, and reduced vibration, which is essential for high-precision applications.
- Superior High-Speed Capability: The combination of a lightweight phenolic cage and low-density ceramic balls significantly reduces centrifugal forces, allowing for a higher limiting speed of 20,000 rpm and lower operating temperatures.
- Extended Service Life and Reliability: Ceramic balls are harder, lighter, and more resistant to wear and corrosion than steel. They provide excellent performance in high-speed and potentially dry-running conditions, enhancing the bearing's durability.
- Precision Ground to P4 Tolerance: Manufactured to P4 (ABEC-7) tolerance class, this bearing guarantees extremely tight dimensional and running accuracy, contributing to the overall precision of the host equipment.
7213 ACD/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles (High-speed milling, grinding)
- High-Frequency Motors and Spindles
- Precision Robotics
- Aerospace and Defense Systems
- Medical and Dental Equipment
