KF042AR0
3/4" Constant Section Bearings
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Part No.
Part No.
KF042AR0
Basic Information
Bearing type
Ball
System of measurement
Inch
Thin section bearings type
Reali-Slim Open
Construction
Single Row
Weight
2.04 lbs
Tolerance class
ABEC-1
ISO radial rating
6891 lbf
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
4.25"
Bore diameter tolerance
-0.0008"– 0"
Outside diameter
5.75"
Outside diameter tolerance
-0.0008"– 0"
Width
0.75"
Width tolerance
+.000 –.005"
Contact angle
30 °
Inner Ring Dimensions
Shoulder diameter inner ring
4.805"
Outer Ring Dimensions
Outer ring large-side face inner diameter
5.365"
Outer ring small-side face inner diameter
5.195"
Performance
Temperature range
-30°C to 110 °C
Radial dynamic load rating
3805 lbf
Radial static load rating
6600 lbf
Axial static load rating
8630 lbf
Static load moment
19050 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:
$ 131.8
/ each
In Stock
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KF042AR0 Bearing Product Overview & Core Advantages
The KF042AR0 is a high-precision thin section angular contact ball bearing designed for applications demanding exceptional rigidity and accurate rotational performance. This single row bearing excels in handling combined loads, efficiently supporting significant radial and axial loads simultaneously due to its specified 30° contact angle. Manufactured to ABEC-1 precision standards, it is ideal for compact, high-reliability systems where space and weight are critical constraints, as evidenced by its slim 0.75" cross-section.
KF042AR0 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| KF | Kaydon® Reali-Slim® bearing series prefix |
| 042 | Bore diameter code for 4.25" |
| A | Indicates a 30° contact angle |
| R | Specifies a brass cage (retainer) |
| 0 | Open (non-shielded/non-sealed) construction |
KF042AR0 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and single row construction with a 30° contact angle provide superior resistance to combined loads, offering a high axial static load rating of 8630 lbf and a radial dynamic load rating of 3805 lbf.
- Precision Engineering: Built to ABEC-1 tolerance class with tight bore and OD tolerances, ensuring smooth, accurate operation essential for precision applications.
- Optimized Component Materials: The use of a brass cage promotes stability at moderate speeds, while chrome steel rings and balls ensure high durability and long service life.
- Compact & Lightweight Design: As part of the Reali-Slim series, it provides a large diameter in a thin cross-section (0.75" width), minimizing system weight and envelope size without sacrificing performance.
KF042AR0 Bearing Typical Application Areas
This bearing is engineered for high-performance systems including:
- Robotics and automation arms (for precision joint movement)
- Aerospace control mechanisms and gyroscopes
- Medical Equipment such as MRI and CT scanners
- Semiconductor Manufacturing equipment (wafer handling robots)
- High-Precision Rotary Tables and indexing heads
