7044 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7044 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
13.2 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
220 mm
Bore diameter tolerance
-0.012mm to 0
Outside diameter
340 mm
Outside diameter tolerance
-0.015mm to 0
Width
56 mm
Width tolerance
-0.3mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
38.1 mm
Ball quantity
21
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
71775 lbf
Radial static load rating
99000 lbf
Limiting speed
6.7 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:
$ 5036.89
/ each
In Stock
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7044 ACD/HCP4A Bearing Product Overview & Core Advantages
The 7044 ACD/HCP4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior performance. Positioned in the P4 (ABEC-7) tolerance class, it is designed to handle significant combined loads, primarily thrust loads in one direction, thanks to its 25° contact angle. A key advantage is its preload availability, which ensures high system rigidity and precise rotational accuracy. The use of ceramic balls and a phenolic cage contributes to reduced weight, lower friction, and enhanced high-speed capability, making it an ideal choice for demanding, high-reliability machinery.
7044 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 7044 ACD/HCP4A provides specific technical information:
- 7044: Basic bearing designation indicating a metric series with a 220 mm bore and 340 mm outside diameter.
- A: Signifies a 25° contact angle, optimized for carrying high axial loads.
- CD: Indicates a specific internal design with high preload for maximum rigidity.
- HC: Denotes the use of Hybrid Ceramic components (ceramic balls with steel rings).
- P4: Specifies the tolerance class P4 (ABEC-7), ensuring extremely tight dimensional and running accuracy.
- A: Confirms the bearing is supplied pre-lubricated.
7044 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The preloaded single-row design and P4 precision provide exceptional system stiffness and minimal runout, which is critical for applications like machine tool spindles.
- Superior Load Capacity: The 25° contact angle is optimized to handle high axial loads in one direction while also supporting substantial radial loads.
- Enhanced High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a high limiting speed of 6,700 rpm, with reduced heat generation.
- Optimized for Performance: The open seal type allows for customized lubrication schemes to match specific operational needs, maximizing performance in controlled environments.
7044 ACD/HCP4A Bearing Typical Application Areas
The 7044 ACD/HCP4A is ideally suited for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- High-Frequency Motors and Spindles: Used in PCB drilling and precision engraving machines.
- Aerospace and Defense Systems: In gyroscopes, radar systems, and auxiliary power units.
- Precision Pumps and Compressors: Where reliable operation under high axial loads is required.
