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Development of Prototype Quiet Hard Rock Stoper Drill - Volume II.

Authors
Patterson-WN
Source
NTIS: PB/86-165073 :37 pages
Link
NIOSHTIC No.
10005005
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 handheld drill weighing 50 lb. Laboratory and field testing in three mines were conducted. The testing showed improved drilling performance with no increase in measured noise levels over the first design.
Publication Date
19850101
Document Type
CP; Final Contract Report;
Fiscal Year
1985
NTIS Accession No.
PB86-165073
NTIS Price
A04
Identifying No.
OFR 20-86
NIOSH Division
PRC;
Source Name
NTIS: PB/86-165073
Performing Organization
Creare Products, Inc.
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