Specific Parameters and Application Scenarios of 030.5mm Ball screw

Specific Parameters 

Dimension Parameters:

• Nominal Diameter: 3mm, which determines the thickness of the screw and affects the load - bearing capacity and installation space.

  
  

• Pitch: 0.5mm, that is, the linear distance the nut moves when the screw rotates one revolution. A smaller pitch enables more precise linear displacement control 

  
  

Precision Parameters:

• For this kind of high - precision ball screw used in dexterous hands, the lead precision reach grade C5, meaning that the lead error within any 300mm is ≤0.012mm.

  
  

• The surface roughness of the screw shaft diameter is Ra ≤ 0.4μm, and the surface roughness of the nut raceway is Ra ≤ 0.2μm, so as to ensure smooth transmission and low friction.




Structural Parameters:

• It adopt a micro internal circulation ball structure, and the outer diameter of the nut is small. 




Load Parameters:

• The rated dynamic load (C): the specification with a diameter of 3mm about 1.2kN. Calculated based on 8 hours of work per day, the service life can reach 5000 hours.




• Transmission Efficiency: ≥90%. Compared with traditional trapezoidal screws (60 - 70%), it has higher transmission efficiency and can effectively reduce energy loss. The no - load starting torque is small, and the no - load starting torque of the 3mm diameter specification is ≤0.01N・m.

Application Scenarios

 Related to Dexterous Hands:

• Humanoid Robot Grasping Module: It is suitable for the narrow space of robot finger joints. For example, the diameter of the finger joint space of Boston Dynamics Atlas robot is 8mm, and the 3mm - diameter ball screw can be well installed in it to realize the precise motion control of finger joints and thus achieve stable grasping.




• Prosthetic Joints: Help prosthetics achieve more accurate and flexible movements, allowing users to better control prosthetics to complete various fine operations, such as picking up small objects.

Medical Field:

• Minimally Invasive Surgical Instruments: For example, when grasping blood vessels, it can realize 0.05N - level grasping force control (force control precision ≤0.1N) when matched with a servo motor, ensuring the fineness and safety of surgical operations. It can also be used in laparoscopic surgical robotic arms, dental implant robots, etc. Its 9CR18 material has passed the ISO 10993 biocompatibility test and has anti - body fluid corrosion ability, making it suitable for medical sterile scenarios.




Optical Equipment:

• In the zoom and focusing systems of optical instruments, it utilizes its characteristics of high precision and low friction to realize precise adjustment of the lens position and ensure imaging quality.




Precision Assembly of 3C Products:

• It meets the high - speed grasping requirements on 3C product production lines. For example, a fruit sorting robot can achieve grasping at a speed of 0.3 seconds per time, and it can be used for the installation and positioning of precision components such as mobile phone chips and display screens.




Semiconductor Wafer Handling:

• It requires high - precision positioning and fast response. The ball screw has a relatively high critical speed, which can meet the requirements of fast and accurate wafer handling in the semiconductor production process.