When I was starting out with column drills, I found all the terms for the different components and also dimensions really puzzling. This post is designed in order to help you if you are attempting to choose a drill and have to comprehend what all the terminology as well as jargon ways.

Components Found on Pillar Drills

Pierce head— the assembly that makes up the chuck, pin, drill little bit, motor as well as pulley-blocks.


Base— the hefty “foot” of the equipment that is bolted to the flooring when it comes to a bigger column drill or the workbench in the case of a smaller bench-mounted drill.

Column— this is the upright pillar that provides the column drill among its names (confusingly, its other common names are “bench drill” and also “drill press”).

Spindle— the upright axle that remains in line with the drill little bit as well as connects the chuck to the drill head.

Chuck— the setting up that fits into the spindle as well as holds the drill bit.

Table— this is often little more than a step in smaller sized bench drill designs. It’s the support for the work piece to be pierced, as well as is attached to the column some distance below the head and also over the base. Tables can be rectangular or round, and also some can be tilted to permit angled boring via a work item. Pillar drill accessories can be gotten to clamp or cradle job items in various angles.


Deepness gauge— a setup that makes it possible for the bench drill to pierce a hole part-way through a job item.

The Definition of Dimensions in Drill Requirements

Throat distance— this is the dimension from the nearby edge of the column to the spindle centre.


Swing— this is a common measure of the capacity of pillar drills and is defined as twice the throat distance, or to place it an additional method, the maximum dimension of disc where you can pierce a main hole.

Spindle taper— this defines the form of the end of the spindle. There are long, brief, women as well as male kinds. The chuck needs to be compatible with the spindle taper.


Collar Diameter— this is the external diameter of the collar or chuck setting up that holds the little bit.

Chuck dimension— this is the size of the inner opening of the chuck assembly, so it defines the maximum size of little bit stem that the drill can take. As a result of this it is likewise recognized merely as the drilling ability.


Spindle traveling— this is the quantity whereby the spindle can be decreased or raised vertically and also defines the maximum depth of hole you could drill in one pass.

Maximum range spindle-to-table— this distance specifies the deepest work item that you can get onto the table.


Optimum distance spindle-to-base— this resembles the above and specifies the optimum depth of job item you can pierce with the table eliminated.

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