Screw Jacks

	Versatile Joyce Metric Machine Screw Jacks lift and precisely position loads from 10 kN to 100 kN. Upright or inverted, these precision jacks operate at full capacity whether the load is in tension or compression. MWJ series jacks are self locking under full lifting capacity. Heat treated alloy steel worm shafts, aluminum/ bronze worm gears and tapered roller or ball bearings provide rugged reliability. Joyce jacks come in translating screw and keyed designs. All jack designs can be fitted with a protective boot.	More Detailed Information
	Joyce Ball Screw Jacks feature a ball nut with integral ball bearings that recirculate along the surface of the ball screw. The significantly reduced friction between the ball nut and screw results in greater efficiency, with up to 2/3 less input torque required to move the load than a similarly rated machine screw jack. NEW additions to the line include a second model of the 10-ton unit, a 20-ton unit, a 30-ton unit and a 50-ton unit.	More Detailed Information NEW additions to ball screw line
	High efficiency Bevel Ball (BB Series) actuators provide higher speeds and less heat generation than other mechanical actuators, with more precise positioning and repeatability than hydraulic cylinders. Featuring spiral bevel gear driven ball screws, BB Series actuators provide efficiencies up to 86%, high duty cycles, travel speeds to 48 FPM and static capacities up to 100 tons. They carry a J-10 life cycle rating with fully predictable service life expectancy.	More Detailed Information
	Joyce Bevel Gear jacks offer higher efficiency and greater speed than other mechanical screw jacks. At the same time, Bevel Gear S Series jacks provide the benefit of a self-locking screw - no special brake is required to prevent the jack from lowering under load. Spiral bevel gears increase strength for higher capacities. Bevel Gear jacks also act as a miter gear box, making them an ideal choice for multi-jack systems. As many as three output shafts may be specified for mounting motors, limit switches, readout devices and other accessories. Bevel Gear jacks are also available complete with reducer or direct drive in a ready-to-run package.	More Detailed Information
	ComDRIVE® is a self-contained actuator package that combines a machine screw jack, motor and gear reducer into a single compact unit. A ComDRIVE unit can power an entire jacking system. It can also simplify your design because you no longer have to size the gear reducer and motor. ComDRIVE costs less to install because the number of components you need to specify is reduced and the only mounting required is one plate for the jack body.	More Detailed Information
	Joyce/Dayton stainless steel machine screw jacks/actuators are specifically designed for positioning or lifting applications in corrosive or other potentially contaminated environments. All exposed surfaces and components feature 316 or 17-4 stainless steel construction and bronze bushings. Nitrile rubber seals protect all internal mechanisms. Unlike other stainless steel jacks, Joyce/Dayton SWJ series provide full lifting capacity.	More Detailed Information
	Upright or inverted, Joyce precision Machine Screw jacks operate at full capacity whether the load is in tension or compression. WJ series single lead jacks are self locking under full lifting capacity. DWJ double lead series jacks offer increased travel speed. Heat treated alloy steel worm shafts, aluminum/bronze worm gears and tapered roller or ball bearings provide rugged reliability. Double extended worm shafts are standard. Single extended worm shafts are available with right to left hand extension or additional length.	More Detailed Information