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Drilling machines are either mechanically or hydraulically driven, and are floor or table mounted. The axis of cutting tool rotation is vertical, horizontal or adjustable and hole location can be determined by positioning either the spindle or the work piece. Additional operations are also performed on drilling machines: boring, counter boring, reaming, tapping, and spot-facing are all similar to drilling in the basic machine motions and usually require a drilled hole to begin with.

There are basically five types of drilling machine

Uprights drills

Radials drills

Horizontals drills

Turret drills

Multiple spindle drill machines


UPRIGHTS: - Upright drilling machines are categorized by a single vertical spindle that rotates in a fixed position and is supported by a modified C-frame construction. The various types include: simple belt drive, sensitive, geared-feed upright, heavy-duty, precision, and deep-hole drilling machines. The simple belt-drive machines are the most widely used. They are machines that do not have a geared or positive mechanical drive to the spindle. If speed changes are needed, then it is accomplished by the shifting of belts. These machines are either floor or bench mounted.

RADIALS: - Radial drilling machines have a radial arm which allows the positioning of the tool head at various distances from the column, permitting the rotation of the head about the column. Therefore, radial drilling machines have a higher work piece capacity than uprights. The various types include: standard, horizontal spindle, and universal radial drilling machines. Standard drillers are the most widely used and are designed so that the spindle stays in a vertical position at all times. Horizontal-spindle work on larger work pieces requiring horizontal drilling. Universal drilling machines have no base, instead they have a runway where the column and the column base can be traversed.

HORIZONTALS: - these machines were made because sometimes it is almost impossible to position work pieces for vertical drilling. The various types include: table-type, way-type, and self-contained drilling machines. Table-types have a rotary table, it allows four sides of a work piece to be programmable. Way-types are usually single-purpose machines designed around flat or bar-type ways. Self-contained drill units use all types of feeding mechanisms, cam, screw, hydraulic, electronic and air pressure.

TURRET DRILLS: - Turret drilling machines have a multi-sided spindle turret, very similar components to that of the upright drilling machine. Depending on the number of faces the turret drills have, they offer more flexibility of separate speed adjustments depending on your desired spindle speed.

MULTIPLE SPINDLE: - Multiple-spindle drilling machines offer a wide variety of spindles from standards to single-purpose production machines. Standard gang drillers consist of two or more standard columns, heads, and spindles that are mounted on a common base. Universal joint drillers allow each spindle to be adjustable within a certain area. In-line drillers have one central drive which drives a number of spindles in a line next to each other. Finally, fixed-spindle production drillers contain a number of spindles arranged in a fixed pattern, getting their power from a series of gears that are driven by a single driver.

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