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Material
Framework in welded steel protected through galvanisation, epoxy primer coat and final tint RAL 7031 painting. Brake shoes are in aluminium league. Rod and large-diameter pins are made of stainless steel and turn in self-lubricating, close-tolerance, bronze bushings. Friction linings in asbestos free high temperature resistant materials are bonded to the shoes.
Optional
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 drum surface. 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.
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