Consist of a highly rigid frame made of strong steel sections on which the traction wheels, tensioning wheels and sling rollers are mounted. Drive and tensioning wheels are formed with hardened and interchangeable sectors. All gears are supported by bronze bearings with a large lubrication chamber. The articulated track is made of boxed and ribbed plates made of thick sheet metal, connected to links by pins and bushings made of case-hardened special steel. The joint is placed at the outer edges of the track and thus outside the feed hopper to prevent material penetration into the joint parts. The track is supported on the outside by rollers while on the inside strscia on rails placed longitudinally to better absorb shocks from falling materials. The thick ribbed shaped sheet metal sides with wear-resistant coating are prepared for supporting and bolting the feed hopper.
Transmission is by planetary gearbox coupled to a motor with torque limiter.