When sourcing screw linear actuators, you must prioritize Load Capacity (Dynamic and Static), Stroke Length, and Speed. For high-precision tasks, verify if the supplier uses Ball Screws (higher efficiency and precision) or Acme/Lead Screws (better for self-locking and cost-efficiency). Ensure the IP Rating (e.g., IP65 or IP66) matches your environment, especially if the unit will be exposed to dust or moisture. Additionally, confirm the Duty Cycle (e.g., 10% or 25%) to prevent motor overheating during continuous operation.