Spiral hand screw adjustable jack
Product Name: Screw jack
The screw jack is one of the types of manual lifting tools, which has the advantages of compact structure and no oil leakage.
The spiral unfolding is a bevel, so it utilizes the inclined surface and the lever two simple machines to achieve the purpose of labor saving, that is, the swing of the rocker is used reasonably, the pinion gear is rotated, and the pair of conical gears are combined to drive the screw to push and lift.
The sleeve, so that the weight rises or falls. Since the bevel is flat, the reliable thread self-locking action supports the weight.