Self Lowering Ball Bearing Gear Screw is widely used for construction and maintenance of bridges, oil fields, shipyard, and other industries. The Ball Bearing Gear Screw is provided with an automatic self lowering device in the Jacks. The Ball Bearing Gear Screw does not require any manual efforts as it comes down automatically by weight of load. The Self Lowering Ball Bearing Gear Screw requires minimum maintenance which reduces the operating cost.