Three high capacity double-girder overhead travelling workshop cranes, completed on schedule for Exxaro and installed at Grootegeluk Coal Mine in Northwest Province during September, are undergoing commissioning trials.

The three cranes, ordered to assist with large vehicle maintenance, were manufactured by Condra on behalf of East Rand Cranes.

Two of the cranes are identical 18,4-metre span 50/20-ton machines fitted with variable frequency drives on the main hoists to facilitate precise positioning of very heavy loads.

Exxaro’s third crane, also with a span of 18,4 metres, has one 20-ton hoist.

They feature live-axle drives across their design in place of the more common ring-gear configuration, part of Condra’s mandate to keep maintenance costs to a minimum.

Other non-standard elements of the Exxaro contract include special LED lighting, limit switches on the long-travels and cross-travels, and armoured cable on all wiring.

Condra, Marc Kleiner

Tel: (011) 776-6000