G I S C H A I N H O I S T S W I S S Q U A L I T Y
10
The electric chain hoist meets the requirements of the EC Machinery Directive and the
relevant EN and FEM standards.
Housing and cover are made of a sturdy aluminum die casting. Fins on the motor
ensure optimum cooling. The chain box can be attached to the compactly constructed
housing. A drilled hole is provided for both the power supply cable gland and the control
cable. The lugs, or optionally the suspension hooks, are attached to the flange ring.
GIS electric chain hoists are driven by asynchronous motors. For two-speed models a
pole switching version of the motor is fitted.
The braking system consists of a DC-operated spring loaded brake. When there is no
current, the pressure spring generates the braking torque.
For functional reasons, the slip clutch is installed in front of the brake system and
integrated into the rotor shaft. It protects the hoist from overload and takes on the
function of an emergency end stop for the highest and lowest hook positions.
A gear-type limit switch is fitted to limit the highest and lowest hook position. As an
option, emergency stop contacts with positive separation can be retrofitted downstream.
Electric chain hoists are fitted with a 42 V contactor control as standard. The emergency
stop contactor that is usually installed separates all three mains power phases when the
red button is pressed.
The high-strength round steel chain meets the requirements of grade DAT (8SS) to DIN
EN 818-7. Sprocket and pulley are hardened. The load hook, which complies with DIN
15400, is fitted with a safety latch.
The two-or three-stage, closed spur gear units are usually helically cut. The gears are
mounted on roller bearings and run greased.
The standard equipment fitted to the electric chain hoist includes a control switch (up/
down with emergency stop).
1.3 Special models
Figure 1-2
Low headroom hoist GCHK
Synchron hoist GCHS
Handy chain hoist GCHHK
Handy double telescopic
hoist GCHHTD