When designing the spiral screw elevator synchronous lifting platform, it is necessary to consider the combination coefficient, and consider the linkage loss when calculating the total power. Combination coefficient of two sets -0.95; combination of three sets -0.9; combination of four sets -0.85; combination of 6-8 sets -0.8. When the two ends of the spiral screw lifter are hinged and installed, the combination coefficient is appropriately increased.
Ordinary trapezoidal screw spiral screw elevator models with large reduction ratios have self-locking function, while those with small reduction ratios are uncertain self-locking, and brakes should be equipped in safe and vibrating situations.
Ordinary trapezoidal screw and ball screw elevator have a lead error of 0.1mm on a 300mm stroke.