| One of the most inevitable machining tools in any | | | | different machining operations which they perform. The |
| manufacturing process is the Drilling machine or the drill | | | | different kinds of drilling machines could be generally |
| press. The drilling machine is mainly used for drilling | | | | categorized into: Portable drilling machine, Sensitive |
| holes of varied sizes in any surface area and in | | | | drilling machine, Upright drilling machine, Radial drilling |
| accurate depths. Apart from this, the drilling machine is | | | | machine, Multiple drilling machine, Gang drilling machine |
| used to perform a multitude of other related functions | | | | & Automatic drilling machine. |
| such as tapping, spotfacing, reaming, countersinking, | | | | Portable drilling machines are the kind of machines |
| and counterboring. Drilling machines are fixed drills that | | | | which are usually employed in the workshop for drilling |
| could either be positioned on a stand or bolted to the | | | | holes. This kind of drilling machine is mainly used for |
| floor or workbench. Their speed can be altered as | | | | drilling holes on objects which cannot be moved. |
| desired by manually moving a belt across a pulley | | | | Portable drilling machines are operated using hand |
| arrangement. | | | | power or with a separate motor. One of the best |
| Most of the modern drilling machines are technically | | | | advantages of a portable drilling machine is that all the |
| automated and use computer numerical control (CNC) | | | | parts of this machine are small and compact. The |
| technology. As a result of this, they can be | | | | motor used in the machine is of universal type i.e; it can |
| programmed as desired to produce accurate results. | | | | be given either D.C or A.C. power. A portable drilling |
| Drilling machines are quite often used for performing | | | | machine can drill holes up to a maximum depth of |
| random workshop tasks such as sanding, honing or | | | | 12mm to 18mm. The hole driller in a portable drilling |
| polishing, and numerous other rotating accessories in | | | | machine has lesser width and high speeds are |
| the chuck. | | | | employed. Small drill bits are used. Some portable drilling |
| Drilling machines could be divided into various types | | | | machines also operate on pneumatic power. |
| based on their size, speed and depth of cut and the | | | | |