Overhead cranes carry the load

July 27, 2006
Machine shops, foundries, and other plants routinely move loads weighing from several to 600 tons on overhead cranes such as the ER-2000 from Whiting Corp., Monee, Ill.

Machine shops, foundries, and other plants routinely move loads weighing from several to 600 tons on overhead cranes such as the ER-2000 from Whiting Corp., Monee, Ill. (whitingcorp.com). Such cranes are built around wide-flange and welded-box girders forming a moving bridge that carries a hoist on a trolley. The hoist can use a variety of brakes in addition to a solenoid-encapsulated self-adjusting (SESA), shoe-type holding brake. These include a mechanical-load brake, an eddycurrent brake, and flux-vector control brake. Both

the trolley and bridge can be controlled by adjustablefrequency Ultra-Drive, a device that uses low-maintenance ac squirrel-cage motors and electronically balanced speed and horsepower for smooth operation, minimal energy use, and precise positioning. And Ultra-Drive controls can be configured as two or three speed, or infinitely variable. The hoist uses a triple reduction helical and spur gear reducer for smooth operation under load. A single operator can control the crane from a 24-V pendant.

Sponsored Recommendations

Altech's Liquid Tight Strain Relifs Catalog

March 13, 2024
With experienced Product Engineers and Customer Service personnel, Altech provides solutions to your most pressing application challenges. All with one thought in mind - to ensure...

Industrial Straight-Through Cable Gland

March 13, 2024
Learn more about Altech's cable glands and all they have to offer for your needs!

Smooth Sorting with SEW-EURODRIVE!

Feb. 22, 2024
Sorting systems are essential when it comes to warehouse automation, material handling, and distribution. SEW-EURODRIVE’s automated sorting solutions increase capacity, reliability...

Setting the Agricultural Industry in Motion

Feb. 22, 2024
Agricultural products go through specialized processes of harvesting, storing, conveying, cleaning, drying, sorting, and handling to ensure that seasonal products reach the processing...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!