Bridge cranes are used for lifting and moving the anodic bars with the parts to be treated through Ali the working steps of the anodizing line, i.e. including treatment and rinse tanks, loading/unloading area, racks pickling area.
The structural frame and the equipment used for a bridge crane are specifically designed in order to comply with the critical conditions involved in any anodizing process.

Basically, each crane consists of:
• N.1 structural frame made of different steel profiles
• N.2 headpieces made of welded steel sheets; each one is fitted with two wheels made of thermally treated steel; twoof them are driving wheels, thanks to a motor-gearbox directly coupled to the wheel itself
• N.2 hoist, devices, consisting of rope-winding drum, two-speed gear motor with electromagnetic brake, high resistance steel rape, limit switch and fixed support base
• N.2 traverse motor-gearboxes with variable speed by means of dedicated frequency inverters; this system allows gradual starts and stops without juddering and wobbling of the parts
• N.2 Quides for lifting of the anodic bars hooks; these guides are made of steel sections which are rigidly fixed to the bridge crane structure; the lifting hooks are fixed to the hoist ropes and run along the inside of the guides on special car
riages
• N.1 provision for anodic bar tilting; the rack with the parts to be treated are hooked to the anodic bar, and this is automatically inclined in the desired direction with the aid of a limit switch; the degree of inclination can vary by means of the limit switches; these limit switches are located along the guides for lifting, and automatically adjust the movement of the anodic bar (stop, change from slow to fast and vice-versa)