In this study, the fracture of piston for rock drill produced from case hardening steel is investigated. In order to study the causes of the fracture, specimens prepared from the damaged pistons were subject.
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[pdf] A slender oil pipe with many elbows and not fixed could cause the pipe to shake when the oil flow rate is high. An unbalanced rotating part of the motor and hydraulic pump, poor alignment during installation, or loose coupling can generate vibration and noise.
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