OFR-20-86 Development Of Prototype Quiet Hard Rock Stoper Drill - Volume II
- Organization:
- The National Institute for Occupational Safety and Health (NIOSH)
- Pages:
- 36
- File Size:
- 10980 KB
- Publication Date:
- Jan 1, 1985
Abstract
This report describes the design and testing of an improved quiet hard rock percussion drill. The improved drill incorporates a tappetless design with independent rotation in a hand held drill weighing 50 lbm. Laboratory and field testing in three mines were conducted. The testing showed improved drilling performance with no increase in measured noise levels over the fist design.
Citation
APA: (1985) OFR-20-86 Development Of Prototype Quiet Hard Rock Stoper Drill - Volume II
MLA: OFR-20-86 Development Of Prototype Quiet Hard Rock Stoper Drill - Volume II. The National Institute for Occupational Safety and Health (NIOSH), 1985.