We are an independent, privatelyowned company representing
a number of manufacturers
from across the world within the
mechanical power transmission
and processing industry in Great
Britain and Ireland.
How To Specify Simple, Reliable
And Adaptable Screw Jacks
he need to raise a load is
one of the most common
requirements in industry.
This is often achieved with
a screw jack, but these need
to be used in conjunction with other drive
components and possibly in a system of
several synchronised screw jacks. Ian Carr
of Drive Lines Technologies explains how
lifting systems are typically designed.
T
In Drive Lines' thirty-plus years of service
to the British machine building and design
engineering communities we have helped
with the development of innumerable
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PECM Issue 23
screw jack lifting systems, and built up our
expertise to the point where we are now
probably the nation's 'go-to guys' for help
with such projects.
We find that most of our clients
have a good idea of the system
they need to build, so most of our
input is directed to helping them
refine their design and selecting the
best components for the job in
hand. However, a few need help
with the basics and we are happy
to get stuck in at this level too.
So, let's start with a quick run through
the basics, then move onto more detailed
ideas.
Screw jacks provide linear motion so are
used to lift, lower, position, align and hold
loads. In this they are similar to hydraulic
and pneumatic cylinders, their advantage
being they don't need an expensive power
pack or compressor, just a simple motor
drive system.
Other attributes of screw jacks include
that they are simple and therefore reliable,
accurate in use, numbers of them can