Common FAQs on Spiral Screw Lift Model Selection: The labor system is the percentage of working time within 10 minutes. The labor system for the SJA series general-tooth spiral lift is 30%, while for ball screw spiral lift, it's 50%. When the specific load is below the rated value, the labor system can be moderately increased.

The specific load ranges from 25% full load (i.e., load factor of 25%), with the torque input equal to load factor multiplied by full load torque. When the stroke exceeds 300mm, reliability should be verified; please refer to the load and stroke reliability trend chart for calculations. Adjust the index according to the type of load: uniform load 1.0-1.2; light to moderate load 1.3-1.5; moderate to heavy load 1.6-2.5.

The input power of the screw jack must not exceed the rated input power during normal operation. The auxiliary output power in kW is calculated as follows: kW = (Full load torque in Nm x Load factor x Input speed in RPM) / 9550. The input power subject to working temperature hazards is calculated as follows: Specific input power = Rated input power x Temperature coefficient. The temperature coefficients are: -10°C to 25°C: 1, 30°C: 0.85, and 40°C: 0.65.

When synchronizing lifting platform design, consider the component index and factor in the coupled loss when estimating total output power. The component index is -0.95 for two units, -0.9 for three units, -0.85 for four units, and -0.8 for 6-8 units. When the spiral lifting machine is fixed and installed on both sides, moderately increase the component index. Generally, large gear screw lifting machines with high transmission ratios have locking functions, while those with low transmission ratios are uncertainly locked. In installation and vibration sites, it is essential to equip a braking system.