For translating screw jacks, key-way is a common way to realize the anti-rotation for the screw jack.In fact, there is another way,that is to use a special square tube.

A square guide tube is attached to either the top or bottom of the Screw Jack. A square bronze nut is attached to the end of the Lifting Screw which is then fitted inside the tube, preventing rotation.

Application: Mostly used on larger Jacks and where the lifting load is high in relationship to the Nominal Capacity or where the travel is long. Please note input torques required will increase by approximately 8%.

Now let's see a video about the non-rotation screw jack with square tube.