Applications:
Lifting installations, cranes, winches, conveyors, elevators, movable bridges, rolling-mill drives, ski lift.
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Materials
Base and brake arms in ductile cast iron. Levers in laser-cut steel St53-3. Pins and rod in galvanized or phosphorized steel C40. Jaws in aluminium league, with glued asbestos free lining, held in position by 4 harmonic steel clamping springs. Surface protection through epoxy primer coat and final tint colour RAL 7031. Largely sized rod and pins of galvanized or phosphorized steel C40 turning in self lubricated sinter bushings.
Optional
DRAG. Automatic lining wear compensator. It provides for automatic re-adjusting of shoe clearance. It acts progressively with lining wear through a free wheel device. It is very useful in heavy braking applications to reduce maintenance rate. It also maintains the brake at its proper operating torque.
External braking spring. It is housed into a square tube provided with graduated scale to ease torque setting. External braking spring is an option to the one inside the thrustor and it is utilized in applications requiring braking torque reduction and adjusting, such as horizontal drives without inverter controlling.
Micro-switch signaling “BRAKE RELEASED”. It advises that the brake is duly released. The signal usually lights a led on the operator’s push-button panel. Its role is preventing damage caused by using the crane with set brake. Whenever the brake isn’t provided with external braking spring, this micro-switch is mounted on the top of the thrustor.
Micro-switch signaling “LINING WORN OUT”. It issues an electric signal as the 2 brake’s arm approach too much to each other on account of worn linings. It is very useful as it advises, whenever the linings have to be replaced, thus preventing the jaws to damage the drumsurface. It is mostly employed along with the automatic lining wear compensator.
Hand release lever. It enables the manual release the brake in power blackout. It is mainly employed to speed up lining replacement or maintenance operations. The symmetric layout of the lever makes easy the release of the brake, without inducing any deflection in the frame work.
Shoes with extended width (1,5 times the standard value) to increase heat dissipation. They are mainly employed in horizontal trolley movements where a high heat dissipation is required.
Thrustors with delay valve. The lifting and/or lowering piston’s movement can be slowed down by means of an easily adjustable valve.
Thrustors in HR-design. The Heat Resistant design is required in extremely hot environments, such as casting cranes, where temperature may reach 100°C for some minutes.