Tools used were still fairly primitive, such as sledgehammers, chisels, pickaxes, crowbars and drill rods.
2.
Weight on bit, the force exerted on the cutting face of the bit by the drill rods in the hole above the bit, must also be monitored.
3.
When water return is lost the rods will vibrate, this is called " rod chatter ", and that will damage the drill rods, and crack the joints.
4.
Diamond core drilling ( exploration diamond drilling ) utilizes an annular diamond-impregnated drill bit attached to the end of hollow drill rods to cut a cylindrical core of solid rock.
5.
As the cuttings are removed inside the rods and are less prone to contamination compared to conventional drilling where the cuttings pass to the surface via outside return between the outside of the drill rod and the walls of the hole.
6.
The drill string is composed of the upper drill rods, a set of " jars " ( inter-locking " sliders " that help transmit additional energy to the drill bit and assist in removing the bit if it is stuck ) and the drill bit.
7.
Some quarries used primitive top hammer machines that carried the jack hammer on a mast-the slenderness of the drill rods working with a relatively large diameter drill bit caused bore holes to deviate which sometimes meant that a bore hole might finish dangerously close to its neighbour or indeed be closer to the face of the quarry than had been intended.
8.
:: : : : : : Firing pin comes to mind, which seems to fit the rapid type of longitudinal motion better versus sinusoidal motion as associated with crank case rod or axial motion as associated with piston and rod ( pinion ) or with twisting motion as associated with drill rod . Preceding talk ) 20 : 14, 16 January 2008 ( UTC)
Meaning
carbon steel used for rock drills and dowels Synonyms: drill steel,
How to say drill rod in Hindi and what is the meaning of drill rod in Hindi? drill rod Hindi meaning, translation, pronunciation, synonyms and example sentences are provided by Hindlish.com.
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