Jacton connecting shafts is used to interconnect the input shafts of worm gear screw jacks that are used in a multiple screw jack lift system arrangement. The connecting shafts transfer the torque from the motor to the screw jack or from screw jack to screw jack. Machined journals and keyways at each end, keys supplied for each end. Standard diameters of 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, other diameters available on request. Available in standard lengths up to 5000mm. Steel, bearing steel or stainless steel connecting shafts designs available. When connecting shafts length exceeds maximum distance between supports. Pillow blocks are required. Below charts with the information: permissible maximum distance between supports, shaft diameter, shaft torque, maximum permissiable speed (RPM).