Rock Drill

A: The roller cones rotate together with the drill rod and cut the rock without percussion under pressure provided by the drill rod from the surface. Carbide inserts situated on the surface of the roller cones penetrate into the rock under pressure and crush it.

A: Air pressure should be between 85 to 90 psig (6 bar) at the tool for proper operation. Using the tools at higher pressure will increase vibration to the operator, decrease performance and output, and may cause premature damage to the tool and steel.

A: The rock drill has a fixed air leg control system, and the thrust of the air leg can be adjusted by the air leg adjustment valve. In the process of operation, if the propulsion length of the air leg of the rock drill can not meet the depth of the rock drilling, and it is necessary to move the air leg to change the position of the second propulsion, only need to pull the trigger to push the reversing valve, and then the air leg of the rock drill will be quickly retracted to change the position.

A: Hand held rock drilling machine common faults and treatment methods include:
● Reduced rock drilling speed: Possible causes are low working air pressure, air leg expansion and contraction, insufficient lubricant. Treatment methods include adjusting the pipeline to eliminate air leakage, increase the diameter of the air supply pipe, add oil to the oil injector.
● Air leg failure: Such as air leg rubber bowl wear, frame and outer tube loose, etc.. Treatment methods include replacing or reassembling the air leg rubber bowl, tighten the frame, etc.

A: Correct use and maintenance of hand held rock drilling machine need to pay attention to the following points:
● The machine is injected with antirust oil before leaving the factory, and should be disassembled and cleaned before use, and lubricating oil should be applied to the mating surface when it is reassembled.
● When connecting the air pipe must be blown clean of debris in the pipe, so as to avoid debris into the machine research damage to the machine parts.
● Before starting the machine, you must carefully check whether the operating mechanism and running parts are assembled correctly and reliably, the oil injector should be filled with lubricating oil, and adjust the oil volume.
● The end of the machine work, you should cut off the water supply and then lightly run for a moment, blowing the residual water droplets in the machine to prevent parts rust.
● Commonly used machines, should pay attention to regular maintenance and repair, at least once a week should be checked to remove the machine dirt, replace damaged and failed parts.

A: Check the integrity of components: Before rock drilling, check the integrity of the rock drill and its support or rock drill trolley, make sure that all components rotate flexibly, and fill necessary lubricants.
Cleaning the working surface: Check the roof and sides of the working surface for live rock and loose rock, and carry out necessary treatment to ensure the working surface is level.
Connecting pipes: When connecting gas and water pipes, blow out the debris in the pipes to avoid debris entering the machine body and affecting normal operation.