years we at Doity have been at the forefront of Engineering Innovation turning
bright ideas into rewarding reality. In 1956 we pioneered the first individual
driven Crane End Carriage that revolutionised the industry sweeping away the
accepted method of line drive shafts. This new concept also offered solutions to
a host of drive problems in a diverse range of applications and industries.
Our policy of offering quality equipment with in built reliability has
established our reputation as second to none. An example of this was our
exploitation of spheroidal graphite iron, 20 years ahead of any other company,
for trackwheels and gears which doubles the life of components.
Our stocking levels are substantial to allow us to meet 24 hour
delivery requests on standard units and our wide range of motor speeds and
powers coupled with many ratios of gearboxes gives a large selection of travel
speeds from 4.7 Metres per minute to 90 Metres per minute. The
introduction of secondary gearboxes allows us to achieve ultra slow speeds of
under 0.5 Metres per minute.
End Carriages • Wheel
Blocks• Wheel Boxes• Crane Bogies
Drive Unit Examples
The main primary use of our Travel Drive units has been as Crane End Carriages.
Here are some typical examples of other places our drives have been
This example is typical of many
trolley transfer applications where the payload could be carried on rollers
or a special cradle, or if the product is granular or liquid the carrier
would be a vessel of appropriate design.
By slight angling of the drives or removal of the inner flanges
of the wheels the units can be successfully employed on curved rails as
in the case in this application.
In exposed conditions such as shipyards, production often
drops during severe weather conditions. By supporting interlinked building
sections on drive units manufacturing can continue undercover. The building
can be opened to allow access or removal of the work-piece and re-sealed to
In this application where components
need de-burring the rotary mill is supported on two pairs of wheels which
provide all the drive necessary to rotate the drum.
Basically this is another example of a
transfer trolley system that allows the payload to be moved both
horizontally and vertically.
A variety of blender applications
have utilised drives where mixing and weighing are part of the process.
Control can be accomplished via limit switch stations and the process can be
All our Travel Drive units
are based on Production Engineering techniques and therefore are
available in standard format. However, we can modify that
format or fabricate units to suit specific requirements, even
producing special features such as bronze anti-spark wheels,
explosions proof motors and special speeds, be they ultra slow or
fast, or flangeless wheels with tyres. All units are built to
our internal quality systems and tested before despatch. Full
documentation can be supplied when required.
Please click the above drawings for a larger version