KB055AR0
5/16" Constant Section Bearings
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Part No.
Part No.
KB055AR0
Basic Information
Bearing type
Ball
System of measurement
Inch
Thin section bearings type
Reali-Slim Open
Construction
Single Row
Weight
0.4 lbs
Tolerance class
ABEC-1
ISO radial rating
2158 lbf
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
5.5"
Bore diameter tolerance
-0.0010"– 0"
Outside diameter
6.125"
Outside diameter tolerance
-0.0010"– 0"
Width
0.3125"
Width tolerance
+.000 –.005"
Contact angle
30 °
Inner Ring Dimensions
Shoulder diameter inner ring
5.731"
Outer Ring Dimensions
Outer ring large-side face inner diameter
5.958"
Outer ring small-side face inner diameter
5.893"
Performance
Temperature range
-30°C to 110 °C
Radial dynamic load rating
1033 lbf
Radial static load rating
2740 lbf
Axial static load rating
2560 lbf
Static load moment
7920 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:
$ 150.02
/ each
In Stock
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KB055AR0 Bearing Product Overview & Core Advantages
The KB055AR0 is a high-precision Angular Contact Ball Bearing designed for applications demanding exceptional rigidity and accurate positioning. Featuring a Single Row construction with a 30° contact angle, this bearing is engineered to support significant combined loads, including high radial loads and substantial axial loads in one direction. Its thin-section design (Reali-Slim Open) offers a compact and lightweight solution, making it ideal for space-constrained, high-performance machinery requiring ABEC-1 precision and reliable operation.
KB055AR0 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| KB | Kaydon® Reali-Slim bearing series |
| 055 | Bore diameter code for 5.5 inches |
| A | Angular Contact design with a 30° contact angle |
| R | Bearing is lubricated from the factory |
| 0 | Standard radial internal clearance and Open (unsealed) construction |
KB055AR0 Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The single row angular contact design, combined with a 30° contact angle and a rigid brass cage, provides excellent resistance to deflection under combined radial and axial loads. It offers a high radial static load rating of 2740 lbf and a substantial axial static load rating of 2560 lbf.
- Precision Performance: Manufactured to ABEC-1 tolerance class with tight bore and OD tolerances, this bearing ensures smooth, precise rotation and accurate positioning, which is critical for high-performance applications.
- Optimized Thin-Section Design: The Reali-Slim Open construction minimizes weight (0.4 lbs) and cross-section without sacrificing strength, enabling compact and lightweight machine designs.
- Durable Material Construction: Components made from Chrome Steel (rings and balls) offer high wear resistance and durability, ensuring a long service life under demanding conditions.
KB055AR0 Bearing Typical Application Areas
This bearing is ideally suited for applications requiring high precision, compact design, and the ability to handle complex loads. Key industries and equipment include:
- Robotics and Automation: Robot arm joints, rotary actuators, and precision positioning stages.
- Aerospace and Defense: Gyroscopes, radar platforms, and missile guidance systems.
- Medical Equipment: CT scanners, surgical robots, and high-speed dental handpieces.
- Semiconductor Manufacturing: Wafer handling robots and precision stages in photolithography equipment.
- Machine Tool: Rotary tables, indexing heads, and high-speed spindles for light-duty operations.
