Trapezoidal Machine Screw Jacks incorporate an alloy or sometimes stainless steel worm which drives a high strength bronze worm gear, or drive sleeve. The worm shaft is supported on anti-friction tapered roller bearings with external seals that prevent lubrication loss. The drive sleeve can also be supported on tapered roller bearings, or ball thrust bearings. Rotation of the drive sleeve causes the acme thread lifting screw to translate or rotate, depending on the jack configuration.When self-locking screw jack is needed, the trapezoidal machine screw jack can be a good choice.
Our machine screw jacks available are as the following:
- Maximal load 1ton~100ton
- Worm ratio 6,12,24
- Housing material: Aluminum or cast iron
- Screw top end: top plate,threaded end,clevis end,plain end,fork end
- Drive: hand driven or electric motor driven
Machine Screw Jacks are best used for:
• Resistance to backdriving
• Environments with vibration
• Manual operation
• High static loads
• Corrosion resistance (with stainless steel versions)