KF070AR3
3/4" Constant Section Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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KF070AR3 Bearing Product Overview & Core Advantages
The KF070AR3 is a high-precision thin section angular contact ball bearing engineered for applications demanding exceptional rigidity and accuracy within compact design constraints. As part of the Reali-Slim Open Bearings series, this single-row bearing is specifically designed to handle significant combined loads, including substantial radial and axial loads in one direction, thanks to its defined 30° contact angle. Manufactured to ABEC 3F tolerance standards, it is ideal for high-reliability, precision motion systems where space and weight are critical factors.
KF070AR3 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| KF | Series identifier for Reali-Slim thin section bearings. |
| 070 | Indicates the cross-section size and bore diameter code for a 7" bore. |
| A | Signifies a 30° contact angle, optimized for high axial load capacity. |
| R | Filling slot construction (not applicable for this open type, but part of the base model designation). |
| 3 | Internal clearance designation (C3 group). |
| Open | No seals or shields, allowing for high-speed operation and custom lubrication schemes. |
KF070AR3 Bearing Structural Features & Performance Benefits
This bearing's performance is derived from its specialized construction. The single-row design with a 30° contact angle provides a high thrust capacity and excellent stiffness for precise positioning. The use of a brass cage ensures stable operation and guidance of the chrome steel balls at higher speeds. Its thin section profile (0.75" width for a 7" bore) minimizes system weight and envelope size without compromising on load ratings, as evidenced by its high dynamic load rating of 4932 lbf and static load rating of 10510 lbf. The specified radial internal clearance and ABEC 3F precision contribute to smooth, low-vibration running, which is critical in precision applications.
KF070AR3 Bearing Typical Application Areas
- Robotics and Automation: Gearing, rotary joints, and actuators where compactness and high moment load capacity are required.
- Aerospace & Defense: Radar platforms, gimbals, and control surface mechanisms.
- Medical Equipment: CT scanners and MRI systems requiring precise, smooth rotation.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
- Industrial Machinery: Rotary tables and indexing heads.
