Definition of rotary drill motor
The space available in the casing of a pneumatic rotary rock or coal drill is necessarily limited and precludes the use of a reciprocating engine. The power unit used instead is similar in design to the vane compressor. The rotor runs at a very high speed, between 3,500 rpm and 4,000 rpm, and this is reduced by gearing to give a drill spindle speed of about 650 rpm.
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Locality Updated: Giuminella Creek, Narzole, Cuneo Province, Piedmont, ItalyFrom Flavio Giuseppe Taricco, 18th May 2013 20:02:11