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Gear feed
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
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Mechanical feed, английский
Screwfeed, английский
A system of gears, ratchets, and friction devices, or some combination of these parts, in the swivel head of a diamond drill, which controls the rate at which a bit is made to penetrate the rock formation being drilled. when controlled by a feed gear, the bit maintains the same penetration rate per revolution regardless of drill-stem revolutions per minute. also called gear feed, mechanical feed.
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Replaceable ferrule, английский
Mechanical feed, английский
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