H-FRAME UNDERCARRIAGE


By comparing this track variation system to the undercarriages with parallel extensions and telescopic extensions, the inverted arrangement of the elements composing them can be seen.


As a matter of fact, in this case the extensions are not fixed to the crawlers, as with the previous carriages, but to the frame, with the sliding seats in the crawlers.


Compared to undercarriages with parallel or telescopic extensions, the H-Frame undercarriages are perfectly symmetrical.


An undercarriage with the sliding seats on the crawlers is considerably more robust, and presents smaller extension strokes. These features make H-frame undercarriages particularly suitable for use with demolition excavators.

H-FRAME UNDERCARRIAGE


By comparing this track variation system to the undercarriages with parallel extensions and telescopic extensions, the inverted arrangement of the elements composing them can be seen.


As a matter of fact, in this case the extensions are not fixed to the crawlers, as with the previous carriages, but to the frame, with the sliding seats in the crawlers.


Compared to undercarriages with parallel or telescopic extensions, the H-Frame undercarriages are perfectly symmetrical.


An undercarriage with the sliding seats on the crawlers is considerably more robust, and presents smaller extension strokes. These features make H-frame undercarriages particularly suitable for use with demolition excavators.

TYPES OF UNDERCARRIAGES

WITH TELESCOPIC SLIDING ARMS

tracmec carro sfili telescopici

This undercarriage is suitable for coupling with machines discharging a continuos strain on the undercarriage (such as drills rigs or material handlers).


WITH PARALLEL SLIDING ARMS

tracmec carro sfili paralleli

Undercarriages with parallel sliding arms are more suitable for coupling with machines such as some types of cranes, which are subject to dynamic force of the wind.


PANTOGRAPH UNDERCARRIAGE

tracmec carro a pantografo

Undercarriages with a pantograph track widening system are very often used with cranes.