The TROM 406 pictured below is designed and manufactured by SCREEN USA, Inc.

HOW DO TROMMELS WORK?

Material feeds into the drum, is lifted up by the rotation and aerated as it falls back down.  This action is repeated with each revolution along the length of the drum.  The finer material passes through the screen openings while the larger material tumbles towards its eventual exit at the rear of the drum.

Trommels can be used to "dry screen" materials like organic matter (top soil, compost or decomposed bark) or materials like sand and gravel.  Trommels can also be coupled with water pumps and washing plants to effectively "wet screen" precious minerals like gold and diamond (as pictured below). 

TROM 406 SPECIFICATIONS

A. Hopper - 1 1/2 yard

B. Feeder - Belt Feed 24 in.

C. Engine - 18 HP Diesel

D. Screen - 4 ft. x 6 ft. Trommel

E. Grizzly - Heavy Duty

F. Idlers - 4 in. Troughing

G. Hauling - Military Pintle

H. Paint - 2 Coat Primer and Enamel

I. Weight - Approximately 5,200 lbs