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MOTOR : The motor is three phase squirrel cage, conical
rotor type working on 440 volts, 3P,50 Hz A.C. supply. This
motor is specially designed for hoist and crane and is
insulated by class 'F' type of insulation according to B.S :
2613. The starting and stalling torques of this motor are
220 % and 290 % of the full load torque. The motor is rated
at 40 % CDF.
BRAKE : The axial movement of the rotor is one of the
characteristics of the conical rotor type of motor. This
characteristic is taken advantage of in the actuation of the
brake. When the motor is started the rotor is axially pulled
into the magnetic centre of the stator and the brake is
released. As soon as the current is cut off the brake spring
presses the brake disc against the cover and the brake is
applied. The braking torque is 100 % above the motor torque
at the rated load.
The maintenance and adjustment of the brake is very simple
and can be done without removing any part. The brake disc
and brake end cover are both made of high grade cast iron
and the brake lining is of 'Ferrodo' type.
GEAR BOX : The gear box is made of high grade cast iron. The
precision spur gears are machined from alloy steel and are
fitted with ball / needle roller bearings. The gear box is
filled with grease.
ROPE DRUM : The rope drum is rolled welded and precision
machined. This rope drum is supported on large diameter
roller bearings on both ends and the drive is through
internal gears.
This rope guide moves on the drum like a nut and prevents
the rope from overriding and loosening.
ROPE : Generally 6 x 37 / 6 x 36 construction fibre core
preformed type, ungalvanised wire rope is supplied. (Galvanised
and steel core wire ropes can also be supplied, if
specifically asked for).
MAIN HOUSING : All hoist parts are enclosed in the main
housing thus forming a better looking integral unit. The
main housing like the rope drum is also of rolled and welded
construction, equipped with mounting bracket.
LIMIT SWITCHES : Every hoist is provided with built in limit
switches to control the top and bottom positions of the
hook. Tappets can be adjusted on limit switch rod to any
position in between the range provided. These limit switches
are actuated by the rope guide.
CONTROL : The hoist is controlled by a pendant push button
station. Supply to the pendant push button station i I s of
110 volts as per IS specifications.
MICROSPEED : All hoists can be fitted with a micro speed
attachment which reduces the hoisting speed to 1/10th of the
main hoisting speed. The micro speed attachment works
independent of the load and main hoist. There is a separate
control for the micro speed. This arrangement is invaluable
in the handling of bulky, heavy and delicate loads.
TESTING : Every hoist unit is tested at 125 % of the rated
load capacity on single fall of rope. Even the components
pass through rigorous inspection tests before the hoist is
approved for dispatch.
EXTENDED TROLLEY
These are particularly required when the load is bulky or
far handling material form furnaces / chemical baths. This
trolley can also be provided with two hooks to deal with
loads like paper rolls, logs etc. When the loads go beyond
the overhead track, an outrigger type of extended trolley is
indispensable These are used for loading on and unloading
from ships in stream. Driver's cabins can also be built
with trolley.
CRAB
Crabs can be supplied as standard units can be custom made.
They offer maximum advantage when working in open. These
crabs can have single or twin hoists units as required. The
driving arrangement can either be with hand geared or motor
driven type. Micro speed arrangement in hoisting can be
provided if required.
TWIN HOISTS ON MONORAIL TROLLEY
For exceptionally high height of lifts this arrangement is
very useful. It also offers the option of two hoisting
speeds. The maximum height is
73 m for a load of 5 tonnes.
for 228 type twin hoists
MICRO SPEED ATTACHMENT
For exceptionally high height of lifts this arrangement is
very useful. It also offers the option of two hoisting
speeds. The maximum height is 73 m for a load of 5 tones.
for 228 type twin hoists
FIXED MOUNTED HOIST
These are available in all types of mountings, eg. floor
mounted, ceiling mounted, wall mounted etc. They are used
for loading and unloading transportation vehicles, through
floor hatches or outside the wall, and for serving
production machinery. When ordering, please state in what
position the hoist is to be mounted and wire outlet (WO)
required.
HOIST WITH TROLLEY
Hoists can be equipped with trolley for horizontal
traveling, The trolley is fabricated from components bolted
and welded together and carried by traveling wheels
supported on all bearings
Smaller loads can be moved with a push type trolley whilst
the hand chain or motor driven should be used for heavier
loads. The motor driven trolley would be the best solution
if the hoists unit is required to move loads rapidly. The
driver motor is of squirrel cage type with built in brake.
The motor drives one or more of the trolley's wheel's gear
rim. Wherever there are limitations to the variable head
room, short head room trolley can be supplied
HOIST WITH FLEXIBLE TROLLEY
When the trolley has to negotiate a curved track or the
material movement is from one bay to another, this type of
arrangement fulfills the requirement. The minimum radius of
curvature the flexible trolley can negotiate is 1.5 meters.
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