Reliability of loading machines operation is determined by reliability and durability of pneumatic engines, in which one of the most responsible and stressed units is the cidinder-piston group. ...

The efficiency of pneumatic rock drills, the durability and reliability of their work are largely determined by the lubrication of the rubbing parts. The studies carried out at the Pnevmatika plant have shown that under conditions of high dynamic loads, high sliding speeds of contacting surfaces and increased temperatures in the contacts, lubrication significantly affects the parameters of the drill, especially its torque, as well as the rate and nature of wear of its main rubbing parts.