ABB DFU series ball screws robots convert rotational into linear motion

Here is the parameter introduction of the ABB DFU series ball screws for robots:

Basic Dimensions

Nominal Diameter: The DFU series has various nominal diameters, including 16mm, 20mm, 25mm, 32mm, 40mm, 50mm, 63mm, and 80mm, to meet different load - bearing and installation space requirements.

Lead: Common lead values are 4mm, 5mm, 10mm, 20mm, etc. The lead affects the linear motion speed and positioning accuracy of the robot. For example, a smaller lead like 4mm or 5mm can achieve higher - precision positioning, while a larger lead like 10mm or 20mm can increase the motion speed.

Nut Dimensions and Hole Spacing: Taking the DFU1604 - 3 as an example, the outer diameter of the nut is 28mm, the length is 48mm, the hole spacing is 10mm, and the overall size is relatively compact, which is convenient for installation and integration on the robot. Different models have different sizes to adapt to different robot structures and installation requirements.

Ball Diameter and Circulation Mode: The ball diameter varies according to different models. For example, the ball diameter of the DFU1604 - 3 is 2.381mm, and that of the DFU1605 - 4 is 3.175mm. The DFU series adopts the internal circulation design, which can save space and make the structure more compact. This design can make the balls circulate smoothly inside the nut, reducing friction and wear and improving the service life and efficiency of the ball screw.

Load - Bearing Capacity

Dynamic Rated Load: The dynamic rated load of the DFU series varies by model. For example, the DFU1604 - 3 is 488kgf, and the DFU1605 - 4 is 1123kgf. The dynamic rated load indicates the maximum load that the ball screw can withstand under dynamic conditions, ensuring reliable operation without excessive wear or deformation during the actual operation of the robot.

Static Rated Load: The static rated load also varies by model. For example, the static rated load of the DFU1604 - 3 is 940kgf, and that of the DFU1605 - 4 is 2288kgf. The static rated load represents the maximum load that the ball screw can bear when it is stationary or in a static state, which is an important parameter to consider when the robot is in a standby state or subjected to static external forces.

Other Parameters

Material: Usually made of bearing steel such as GCr15 (HRC60 - 62) and 9Cr18 (HRC55 - 58), these materials have good mechanical properties and wear resistance, which can ensure the service life and reliability of the ball screw.

Precision Grade: It can reach precision grades such as C1, C3, C5, and C7 (JIS standard). High - precision grades such as C1 and C3 are suitable for applications that require extremely high positioning accuracy, while C5 and C7 are more commonly used in general - precision robotic applications.

Axial Play: The axial play is within the range of 0 - 0.005mm and can be zero in some cases, which can ensure the high - precision linear motion of the ball screw and meet the requirements of high - precision positioning in robotic applications.

Preload: There are preload levels such as P0, P1, P2, P3, and P4. By adjusting the preload, the rigidity of the ball screw can be changed to make it more suitable for different working conditions and reduce axial play.

Here are some models of the ABB DFU series ball screws:

DFU1604-3;DFU1605-4;DFU1610-3;DFU2004-3;

DFU2005-4;DFU2504-3;DFU2505-4;DFU2510-4;

DFU3205-4;DFU3210-4;DFU4005-4;DFU4010-4;

DFU5010-4;DFU6310-4;DFU6320-4;DFU8010-4;

DFU8020-4