FELLAR has more than forty years of experience designing and manufacturing all kinds of transmission components (standard or special) destined to the opencast mining sector and rolling (bearings) for industry leaders.


Worm-gear reducers (convex gearing) and planetary for driving heavy tracks.

Special orthogonal gear reducers destined to coal conveyors.

Large diameter yaw rims and special bearings for bucket wheel excavator.

Orthogonal planetary gearboxes, 35 tons., for the bucket wheel driving of excavators.

Perpendicular reducers with flange, 15 tons, for waste belt drive.

Special reducers convex toothed worm-gear and irreversible for lifting people drives.

Tandem and orthogonal gear reducers for driving mine fans with protections.

Multi-stage vertical reducers and perpendicular shafts destined to the coal crusher drive (up to 40 tns.)


Our engineering department was the first in Spain to design and manufacture planetary gear wheel (30 tons) for operating the bucket wheel excavators in coal opencast mines. This design equipped BUKAU WOLF and TAKRAF machines at ENDESA’s exploitation in As Pontes (A Coruña).

Parameter Name	Parameter Value
Type	worm
Shaft orientation	parallel-shaft
Applications	transmission
Other characteristics	vertical for hydraulic pumps