When I was starting out with pillar drills, I discovered all the terms for the different components and also measurements actually confusing. This short article is designed in order to help you if you are aiming to choose a drill and need to comprehend what all the terminology and jargon methods.

Components Found on Pillar Drills

Drill head— the assembly that composes the chuck, pin, drill bit, electric motor and wheels.


Base— the heavy “foot” of the device that is bolted to the flooring in the case of a bigger pillar drill or the workbench in the case of a smaller bench-mounted drill.

Column— this is the vertical column that gives the column drill one of its names (confusingly, its other common names are “bench drill” and “pierce press”).

Spindle— the upright axle that remains in line with the drill little bit and also attaches the chuck to the drill head.

Chuck— the assembly that fits onto the pin and also holds the drill little bit.

Table— this is in some cases little bit more than a step in smaller bench drill versions. It’s the support for the job piece to be drilled, and is connected to the column some distance below the head as well as over the base. Tables can be rectangular or round, as well as some can be slanted to allow angled boring via a work piece. Column drill accessories can be bought to clamp or cradle work items in different angles.


Depth gauge— a setup that allows the bench drill to pierce a hole part-way with a work item.

The Significance of Dimensions in Drill Specifications

Throat range— this is the measurement from the local side of the column to the pin centre.


Swing— this is a common measure of the ability of pillar drills and is specified as twice the throat range, or to put it one more way, the maximum size of disc where you could drill a main opening.

Spindle taper— this defines the form of the end of the spindle. There are long, brief, women and also male kinds. The chuck needs to work with the pin taper.


Collar Diameter— this is the external size of the collar or chuck assembly that holds the bit.

Chuck dimension— this is the size of the inner opening of the chuck setting up, so it specifies the maximum size of little bit stem that the drill could take. Due to this it is also known merely as the exploration capacity.


Pin traveling— this is the amount by which the spindle can be lowered or elevated vertically and specifies the maximum deepness of hole you could pierce in one pass.

Optimum distance spindle-to-table— this range specifies the deepest work piece that you could get onto the table.


Optimum distance spindle-to-base— this is similar to the above and defines the maximum deepness of work piece you could pierce with the table removed.

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