ABB FSI4005-4 FSI series ball screws robots convert rotational linear motion

The ABB FSI4005-4 is a high-performance ball screw from the FSI series, which is widely used in robotic applications. It plays a crucial role in converting rotational motion into precise linear motion, providing the necessary accuracy and stability for robot operations.

2. Parameter Details

2.1 Dimensions

Screw Shaft Diameter: The nominal diameter of the screw shaft is 40mm. This relatively large diameter endows the ball screw with high rigidity and load-bearing capacity, making it suitable for applications where heavy loads need to be handled.

Lead: The lead of the ball screw is 5mm. It means that for each complete rotation of the screw shaft, the nut will move 5mm axially. A smaller lead like this is beneficial for achieving high - precision positioning in robotic systems.

Nut Dimensions: The specific dimensions of the nut, such as outer diameter, length, and mounting hole spacing, are designed to ensure proper installation and connection with other components in the robot. For example, the outer diameter of the nut is carefully sized to fit within the mechanical structure of the robot without causing interference.

2.2 Load - Bearing Capacity

Dynamic Load Rating: The dynamic load rating of the FSI4005-4 is relatively high. It can withstand a certain amount of dynamic load during continuous operation, which is crucial for robots that perform repetitive tasks or move at high speeds. This high dynamic load capacity ensures the long - term reliability and durability of the ball screw.

Static Load Rating: The static load rating indicates the maximum load the ball screw can bear when it is in a stationary state. A sufficient static load rating is necessary to prevent deformation or damage when the robot is holding a heavy object or under static pressure.

2.3 Precision and Accuracy

Precision Grade: The FSI4005-4 usually offers a high - precision grade, such as C3 or C5 according to relevant standards. A high - precision grade ensures that the linear motion of the ball screw is accurate and repeatable, which is essential for robots that require high - precision operations, like those in the electronics manufacturing or medical device industries.

Axial Play: The axial play of the ball screw is minimized. A small axial play reduces the backlash during motion, resulting in smoother and more precise movement of the robot.

2.4 Material and Surface Treatment

Material: The screw shaft and nut are typically made of high - quality alloy steels, such as bearing steel. These materials have excellent mechanical properties, including high hardness, wear resistance, and fatigue resistance, which can guarantee the long - service life of the ball screw.

Surface Treatment: The surfaces of the screw shaft and nut are often treated with special processes, such as heat treatment and surface coating. These treatments can further improve the wear resistance and corrosion resistance of the ball screw, especially in harsh working environments.