| Webster's Online Dictionary |
| Expressions | Definition | ||
| Hammer drill | A Hammer drill (as distinct from a rotary hammer drill) is a rotary drill with a hammering action. The hammering action provides a short, rapid hammer thrust to pulverize relatively brittle material and provide quicker drilling with less effort. A hammer drill is perfect for drilling holes in masonry or stone. It is also used to drill holes in concrete footings to pin concrete wall forms and to drill holes in concrete floors to pin wall framing. (references) | ||
Source: compiled by the editor from various references; see credits. | Top | ||
| Expressions | Domain | Definition | |
| Hammer drill | Mining | 1: A light, mobile and fast-cutting drill in which the bit does not reciprocate but remains against the rock in the bottom of the hole, rebounding slightly at each blow. Source: European Union. (references) | |
| 2: A. A light, mobile, and fast-cutting drill in which the bit does not reciprocate but remains against the rock in the bottom of the hole, rebounding slightly at each blow. There are three types of hammer drills; drifter, sinker, and stoper b. A development of the piston drill in which the drill steel is not attached to the piston but remains in the hole, the piston delivering a rapid succession of light hammer blows. The drill steel is frequently hollow so that air or water may be driven through to cool the bit and clean the hole. Rotation of the bit is automatic. Also known as jackhammer c. A percussive drill d. A rock drill powered by compressed air that reciprocates a free piston, causing it to strike the shank of the drill steel. When of light construction, a hand hammer drill, otherwise supported on a tripod or ba. (references) | |||
| Hand hammer drill | Mining | An ordinary rock drill held in the hand and not mounted on a bar or column. The air leg support is now widely used in tunnels and rock drilling generally. (references) | |
| Motor hammer drill | Mining | Usually has a built-in gasoline engine as prime mover, flushing being provided by the exhaust gases or by compressed air produced in the machine. Total weight varies between 50 lb and 120 lb (22.7 kg and 54.4 kg). Motor hammer drills are used for odd-job operations, on forest roads, in prospecting, etc., where it is not worthwhile to lay air supply lines on account of transport difficulties or insufficient volume of work. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
Topics by Level of Interest: HAMMER DRILL | ||||
| Topics sorted by level of Interest | Level (1=low, 600=high) | Topics sorted Alphabetically | Level (1=low, 600=high) | |
| Rotary hammer drill | 2 | Rotary hammer drill | 2 | |
Source: the editor, created by/for EVE to gauge likely levels of human interest in linguistically triggered topics (compiled across various sources, such as Wikipedia and specialty expression glosses). | ||||
