Technical Evaluation of Diver-Held Power Tools.
Technical rept. Nov 1968-Jun 1970
NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
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Pneumatic and hydraulic hand-held power tools were evaluated by divers performing realistic underwater tasks. These tasks included drilling steel and aluminum, nut running and tightening, grinding metal, and chain sawing wood. An on-the-site observer monitored diver performance time for each task. Diver skill in effective tool utilization is very important in working underwater. At test depths to 60 feet, hydraulic tools were very effective and practical, while pneumatic tools, although effective, required excessive maintenance. At greater depths, hydraulic tools retain their effectiveness, but pneumatic tools lose effectiveness because of the compressibility of gas. Hydraulic tools generally supply more energy per unit of tool weight than do pneumatic tools thus, the diver can perform work more rapidly using hydraulic tools.
- Personnel Management and Labor Relations
- Machinery and Tools
- Marine Engineering