KD042AR0
1/2" Constant Section Bearings
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Part No.
Part No.
KD042AR0
Basic Information
Bearing type
Ball
System of measurement
Inch
Thin section bearings type
Reali-Slim Open
Construction
Single Row
Weight
0.84 lbs
Tolerance class
ABEC-1
ISO radial rating
3786 lbf
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
4.25"
Bore diameter tolerance
-0.0008" – 0"
Outside diameter
5.25"
Outside diameter tolerance
-0.0008" – 0"
Width
0.5"
Width tolerance
+.000 –.005"
Contact angle
30 °
Inner Ring Dimensions
Shoulder diameter inner ring
4.62"
Outer Ring Dimensions
Outer ring large-side face inner diameter
4.991"
Outer ring small-side face inner diameter
4.88"
Performance
Temperature range
-30°C to 110 °C
Radial dynamic load rating
1876 lbf
Radial static load rating
3750 lbf
Axial static load rating
4420 lbf
Static load moment
10830 lbf
Lubrication
Lubricated
Radial internal clearance
0.0000 – 0.0005"
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Brass
Environment & Compliance
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 120.93
/ each
In Stock
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KD042AR0 Bearing Product Overview & Core Advantages
The KD042AR0 is a high-precision thin section angular contact ball bearing designed for applications demanding exceptional rigidity and precise motion control. Engineered with a single row construction and a significant 30° contact angle, it is optimized to handle substantial combined loads, including high thrust loads in one direction alongside radial loads. Its Reali-Slim open design offers a compact, lightweight solution, making it ideal for space-constrained, high-performance systems requiring ABEC-1 precision and reliable operation.
KD042AR0 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| KD042 | Indicates the specific bearing series and size designation (4.25" Bore). |
| A | Signifies the 30° contact angle, optimized for high axial load capacity. |
| R0 | Denotes Radial Internal Clearance group (0.0000 – 0.0005"). |
| (Open) | No seal/shield, allowing for custom lubrication schemes and high-speed capability. |
KD042AR0 Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The single row angular contact design with a 30° contact angle provides superior resistance to combined loads. It offers a high axial static load rating of 4420 lbf and a radial dynamic load rating of 1876 lbf.
- Precision Engineering: Manufactured to ABEC-1 tolerance class with tight dimensional control on the bore, outside diameter, and width, ensuring smooth, accurate operation and ease of integration.
- Optimized for Performance: The brass cage ensures stability at higher rotational speeds, while the chrome steel rings and balls provide excellent durability and wear resistance.
- Space-Saving Design: As a Reali-Slim bearing, it features a exceptionally thin cross-section (0.5" width) relative to its bore diameter, saving critical space and reducing overall weight (0.84 lbs).
KD042AR0 Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications where space, weight, and precision are critical. Key industries and equipment include:
- Robotics: Robotic arms, rotary joints, and precision actuators.
- Aerospace & Defense: Gimbal systems, radar platforms, and guidance systems.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
- Medical Equipment: CT scanners, surgical robots, and diagnostic instruments.
- Industrial Automation: Rotary tables, indexing heads, and high-speed spindles.
