Manhole cable guide bows, pulleys and tensioning bars are all constructed from robust steel. They are all completely galvanized and have long working lives even under tough conditions. The rollers are made of particularly abrasion-resistant aluminium alloy and run on maintanance free dirt and soil proof ball bearings. The the cable is to be fed from the drum into the conduit without a minimum of friction and without kinks. The cable coating and the winching rope are preserved and the power required for winching is reduced.
