Hydraulic jacks and screw jacks serve the same basic purpose, allowing mechanics to lift and support heavy loads in the shop. That said, there are some pretty major differences in how they work, the ...

Machine Screw jacks are used for positioning loads in numerous applications, however when the load direction alternates between tension and compression within the operating cycle and a high position ...

In order to continuously maintain a road bridge workmen need access to the complete span of the bridge for inspection and routine maintenance. For work under and on the side of the bridge access needs ...