Overview: This document provides guidelines for selecting precision joints with either needle or plain bearings, based on driving torque, articulation angle, and operating speed. It includes tables for correction values and examples of size selection.

Specifications: The document outlines the selection criteria for precision joints, specifying the maximum operating speeds for different types: needle bearing joints (max 4000 min-1) and plain bearing joints (max 1000 min-1). The selection is based on the driving torque adjusted by a correction value related to the articulation angle.

Procedures: To select the appropriate joint size, calculate the selected torque by multiplying the driving torque by the correction value for the given articulation angle. The document provides examples:

• For a needle bearing joint with a driving torque of 8.8 Nm and an articulation angle of 20°, the correction value is 1.25, resulting in a selected torque of 11 Nm at 2000 min-1.
• For a plain bearing joint with a driving torque of 63 Nm and an articulation angle of 30°, the correction value is 2.2, resulting in a selected torque of 138.6 Nm at 400 min-1.

Tables and Data: The document includes tables listing articulation angles and corresponding correction values, which are crucial for determining the selected torque. These values are essential for ensuring the correct joint size is chosen based on specific operational requirements.

Recommendations: When selecting precision joints, consider both the driving torque and the correction value for the articulation angle. Additionally, for extendable joints, the overall length and speed should be factored into the size determination.