1.45# manganese steel lifting sleeve:Strong pressure resistance, not easily deformed, stable with high hardness, providing a safer operation. 2.High manganese steel screw gear: Made of high-frequency quenched high manganese steel, not easily broken or bent. 3.Safety Warning Line: Stop lifting when the line is out.A typical screw jack consists of the following components: - Worm Gear: Converts rotational motion from the worm shaft into linear motion of the lifting screw. - Lifting Screw: Transmits the motion from the worm gear to the load. - Gear Housing: Encloses the worm gear and protects it from external elements. - Bearings: Support the rotating components and facilitate smooth operation. - Base and Mounting Plate: Provide stability and a secure anchor point for installation. Screw jacks offer several advantages, including: - Precise Lifting: Screw jacks provide controlled and precise lifting, making them suitable for applications that require accurate height adjustments. - High Load Capacity: They can handle heavy loads, making them useful in industries that deal with substantial weights. - Self-Locking: Screw jacks have a self-locking feature, which means they can hold the lifted load in position without the need for additional mechanisms. - Compact Design: Their compact size and vertical lifting capability make them suitable for limited space environments.