Screw and nut drive lifts have many great features but may not be suitable in every environment. If you are choosing a lift for your business, make sure your requirements can be met and any downsides won’t be a deal breaker.
The simplicity of the mechanism means it is easy to maintain and service. Usually screw and nut drive lifts are relatively low cost initially and over the lifetime.
As the system has so few parts, screw and nut drive lifts have a small footprint. The shaft or enclosure is usually not much larger than the size of the platform you choose. Platform lifts are ideal for small spaces.
Screw and nut drive lifts are incredibly safe. If the motor stops, the lift basically sits on the thread so cannot fall or do the classic ‘dead drop’ situation associated with lifts in films.
With no huge oil pits, and generally no head fixing or similar, screw and nut drive lifts are usually very quick and easy to install. There are minimal building works required and, in the case of Gartec lifts, the lift structure is modular so takes around 2-3 days to install.
If the system is used in an open platform lift, such as our 7000 lift, then the buttons on the platform are hold-to-run. This is due to the machinery directive being the governing regulation, rather than the lift directive.
The speed of a screw and nut drive lift is not quite as fast as traction lifts or hydraulic lifts, making them not as suitable for tall buildings (over around 6 floors). Open platform lifts (such as the Gartec 7000) are restricted to 0.15m/s, instead of 0.2-0.3m/s for other drive types.
Weight restrictions on screw and nut drives are a little lower than hydraulic or traction lifts. Gartec platform lifts go up to 500kg, so the difference is only noticeable if you need a very large lift. A large goods lift will normally use a different system for example.