Air leg drilling. A pneumatic cylinder was attached to the drill and its end was secured to the floor by a claw like end. As the drilling progressed the air leg would maintain pressure on the drill and also hold the weight of the drill. Prior using the air legs It was physically tiring for the miner to hold up the heavy drill as well as pushing pressure onto it.
Bazza155
Air leg drilling. A pneumatic cylinder was attached to the drill and its end was secured to the floor by a claw like end. As the drilling progressed the air leg would maintain pressure on the drill and also hold the weight of the drill. Prior using the air legs It was physically tiring for the miner to hold up the heavy drill as well as pushing pressure onto it.