RWU-50 hand rotary-percussive drill supplied with 2% oil-water emulsion
Pac A., Stenka G., Warachim W.

S u m m a r y
The paper describes the RWU-50 hand rotary-percussive drill supplied with 2% oil-water emulsion. This drill is used to drill blast holes and bolting holes in the rocks which hardness is higher than 30 MPa. Effectiveness of hard rocks drilling process is secured by the MH-1 hydraulic hammer used in a drill design, which has a frequency of impacts higher than 6000 min‑1, and unit impact force equal to 32 kN when supply pressure is equal to 20 MPa.