Custom Hoists
Custom Hoist are manufacturers of hoists with a wide range of lifting capacity varying from 0.25 tons to 50 tons.
They confirm to class II duty as laid down in IS 3938/1983. Hoists confirming to class IV as per IS 3938/1983 can also be supplied.
Special Highlights of our hoists are
- Special <Quick Brake> adjusting system. Takes only a few minutes to adjust thus reducing the down time.
- Trolley is so designed that it is adaptable to wide range on I beam Sizes
- Built-in safety limit switches control top and bottom position of the hook
- Hoist motors are designed for 'F' class insulation which is superior to class 'A' 'E' and 'B' types of insulations.
Salient Features HOIST-O-HIND Electric Hoists
MotorThe motor is three phases squirrel cage, conical rotor type working on 440 volts. 50 c/sec. 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% ED.
BrakeThe 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 us very simple due to <Quickbrake> system 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 BoxThe gear box is made out 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 DrumThe 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. The ample drum diameter ensures the best possible working condition for the wire rope.
Rope GuideThe rope guide is made of high grade cast iron. The rope tightener is built-in in the rope guide itself. This rope guide moves on the drum like a nut and prevents the rope from overriding and loosening.
RopeGenerally 6 x 37 construction fibre core, pre-formed type, ungalvanised wire rope is supplied. (Galvanised and steel core wire ropes can also be supplied, if specifically asked for.)
Main HousingAll 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 SwitchesEvery hoist is provide with built-in limit switches to control the top and bottom position of the hook. Tappets can be adjusted to any position in between the range provided. These limit switches are actuated by the rope guide.
ControlThe hoist is controlled by a pendant push button station. Supply to the pendent push button is of 110 volts as per IS specification.
MicrospeedAll hoists can be fitted with a micro speed attachment which reduces the hoisting speed to 1/10 th 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.
TestingEvery hoist unit before dispatch is tested at 125% of the rated load capacity on single fall of rope. Only after all the components pass the rigorous inspection tests, the hoist is approved for dispatch.
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