Column Drilling Machine, Pillar Drilling Machine or Bench Drilling Machine?

Safety instructions for handling bench drilling machines

Column Drilling Machine, Pillar Drilling Machine or Bench Drilling Machine?: machine

Stationary drills already offer the advantage that they have a firm and secure state. Consequently, but also larger forces can be transmitted, what a higher risk of injury can cause.

In addition to the usual references to safe work clothing, one headgear with long hair and the Prohibition of gloves, should therefore be the safe clamped workpiece in the foreground. If the drill fails or jams chips, the workpiece can be entrained and also thrown away. But that's not all. Hard and brittle drills can break and break off small pieces. Therefore, always one should safety goggles be worn.

Another risk comes from long drill shavings that wrap around the drill and are hurled at high speed in a circle. Never try to remove the chips by hand. Heavy cuts can be the result. Use one swarf hook with attached handle and stop the machine when chips have to be removed.

Stationary drills offer many advantages and can therefore be found in many workshops. Some time ago they remained due to their size and weight professional field reserved, today they are due to lighter engines and improved technologies also affordable for home improvement and above all transportable.

But if you look in the net after Column Drilling Machine, Column Drilling Machine or bench drill, you get to see many different models and designs. A separation of the different construction variants can not be seen. Therefore, it is difficult to see what is really needed.

Our contribution should help to filter the decisive features and thus make the purchase decision easier. First of all, it can already be said that none of the designations has to say something about the size of the drill. The term table drill, however, has become naturalized on the table.

The table drill is not necessarily on a table

The terms drill drill and bench drill let assume that with this the size is meant. The drill press stands as a large stationary device on the floor and the small table drill on the table. But that was not the basis.

Column Drilling Machine, Pillar Drilling Machine or Bench Drilling Machine?: bench

Bench drill, as it has a work table

The term "table" in this case referred to the worktable that a hand drill does not have. Therefore, all stationary drills with worktable as bench-top drills designated. The size of the table drill had no relation to this. Meanwhile, however, it has been noted that small column drills, which are mounted on a table, to be referred to as table drilling machines. But here too, the Size still very different his.

When buying one must therefore pay attention to the specified size and especially the maximum Bohrhub.

Frequently, however, is also the Term drill - not to be confused with the drill press - used. Here is actually assumed by a large table drill, which is on the ground. However, many Internet shops use all terms in their text to cover all searches and to lure customers into the shop. As a buyer, therefore, no conclusion can be drawn from the item description to the actual size of the table drill. It is necessary to compare the technical data. Helpful for this comparisonsin which the technical data of different models are compared. The different designations table, stand or column drill need not be considered.

The upright drill is hardly found in local workshops

Even if Amazon and Co. under the search term "Drill press" lists many products, there is not a single one to find. The reason is quite simple - they are not needed in local workshops and are too inflexible.

Column Drilling Machine, Pillar Drilling Machine or Bench Drilling Machine?: drilling

Milling machines are constructed similar to upright drilling machines

Drill presses are bench-top drills that derive their name from a stand as the main body. These stands are in almost all cases made of cast steel, large, heavy and extremely stable due to their massive construction. They withstand enormous forces and enable the drilling of very large holes in steel. The required machine vices alone sometimes outweigh the bench-top drilling machines used by private users.

The stable construction not only has its price, it also has a big disadvantage. Unlike with column drills, the do not turn the height-adjustable table away, Such a disadvantage and the so limited flexibility can companies and large workshops balance with several bench drills. They require special stability and therefore often rely on upright drilling machines.

In private workshops, the requirements are not so high and due to limited space, machine tools have to be used flexibly. A stand drill would be more of a hindrance than useful. That is also the reason why they can not be found in home improvement shops.

A similar construction - as shown in the picture on the right - can still be seen frequently. However, she is used for one Combination of table boring and milling machine, When milling occur significantly higher lateral forces that require a torsionally rigid structure. This can not be achieved with a pipe as a stand. Therefore, even small milling machines have a solid stand and no column.

Pillar drilling machines for DIY enthusiasts

Column Drilling Machine, Pillar Drilling Machine or Bench Drilling Machine?: bench

Pillar drill with second table and belt drive

Pillar drilling machines cover the Requirements of many home improvement from. Your pillar as a stud work is sufficiently stable for normal drilling work, need little space and saves weight.

So if you are looking for a stationary drill, you will find it in the column drilling machines. As mentioned at the beginning, the devices must be looked at closely and the technical data compared.

Column drilling machines offer a very special advantage over column drills with their column. Due to the tube can be with many of the Turn the table to the side and use the stand as a clamping table. The possibility, however, depends on the structure of the saw. For this it needs a movable clamping table, which not every column drill offers. Especially small table devices already use the base as a table and have no other.

Disadvantage of this design is the long tube that serves as a stand and at the same time as a guide. The cheaper the machine is, the more unstable is the tube in many cases, which can lead to twisting when applying large forces. However, this does not mean that these bench drills can not be used for common applications. Only with larger holes must be drilled a bit dosed. It is recommended, however, the To check stability when buying or to rely on experiences of other users.

Belt drive or direct drive, where are the advantages

Column Drilling Machine, Pillar Drilling Machine or Bench Drilling Machine?: drilling

Engine sits behind the pillar; above the belt drives

Which drive technology is used, is subject to personal taste, since both variants have their advantages and disadvantages. Of course, the belt drive has a clear advantage in terms of price, but this also depends on the equipment.

Table drills with belt drive use one in almost all cases Engine behind the pillare is and always used a constant speed. To change the speed it is necessary that the belt is adjusted for power transmission. For this purpose, three or more pulleys are mounted as a pyramid on each other on the engine and on the drive spindle. If the belt is seated on the engine on a small pulley, the large pulley is used on the drive shaft. From the translation results in a low speed at high power. Arranged upside down, a high speed is achieved at low force. The principle is certainly known to everyone from the bicycle gearshift.

Rarer to find are adjustable pulleys. For this purpose, two conical disks are pressed against each other, so that the Diameter of the belt tread changed and the speed can be infinitely adjusted. Without this function, the belt drive offers between three and five fixed speeds.

Advantage of this power transmission is primarily the smoothness. Without a gearbox and clattering gears, only the engine causes a working noise. Thanks to their simpler construction, belt-driven bench-top drills are also cheaper and less prone to defects.

Column Drilling Machine, Pillar Drilling Machine or Bench Drilling Machine?: pillar

Bench drill with direct drive and two gear stages

Somewhat rarer to find are Table drills with direct drive (more commonly seen on upright drilling machines). They dispense with a belt transmission and the drive motor is space-saving housed directly on the drive spindle. The speed control is usually electronic, which offers a special comfort, but also has a major disadvantage. If the drive motor is electronically regulated to a lower speed, the torque is not automatically increased, as in a belt ratio.

For table drills without belt transmission, care should therefore be taken that at least two gear shift stages are available, which change the translation and thus a high speed or a high torque at low speed provide. Purely electronically controlled bench drills provide a comfortable adjustable speed, but often little power for large holes. Comparable would be a cordless screwdriver, in which the speed can be regulated on the throttle and additionally has two switching stages for drilling or screwing.

Depending on the structure, this can Design offers the advantage of a particularly good concentricity, If, instead of a spindle stroke, the entire drilling unit is moved to drill, the drive spindle can be stored more securely, since it does not have to be adjusted in height. This ensures a significantly better smoothness. Correspondingly, however, the drilling unit must be guided on the column.

Drilling machine stand as a replacement for a bench drill

Column Drilling Machine, Pillar Drilling Machine or Bench Drilling Machine?: drilling

Drilling machine stand with drill

Bench Drills can be very cheap, but often have a lower quality. Good devices are therefore more in the higher price level from 200 - 300 € settled. Who does not want to give up the possibility to drill exactly vertical holes, can become one Drilling machine stand to grab.

The drill stand simplifies the bench drill by including the drilling table and the stand, but the drive unit by a hand drill must be ensured. By means of a clamping neck this is held in the drill stand and can be moved vertically via a lever mechanism.

Basic requirement is one Drill with clamping neck (38 or 43 mm - please note) and the possibility of. For safety reasons, many drills can only be operated by constantly pressing the switch and can no longer lock. For the desired use in a drill stand should therefore be paid to this function.

In terms of price, drill stands are far below a bench-top drill, but here the price differences can be felt very quickly. Often suffer just the stability and comfort of the height adjustment underneath.

Anyone considering the purchase of a drill stand should not be too frugal and pay attention to the quality and customer opinions.

Take care when using clamps

Column Drilling Machine, Pillar Drilling Machine or Bench Drilling Machine?: column

Machine vices increase safety

Sometimes manufacturers equip their table drills with better comfort, such as laser display, electronic speed indicator or jigs out. The latter should be used only with care.

Every metalwork has two processing directions, On the one hand the feed movement, in which the tool is guided and on the other hand, the direction in which move the cutting. The workpiece should be secured in both directions.

When making boreholes on the bench drill that includes the Movement from top to bottom, which is automatically secured by the drill table, which offers a stable counterpoint, on the other hand, the Rotary movement of the drillthat needs to be intercepted. clamps quickly mislead to neglecting a good backup of the workpiece. The clamping claw is quickly positioned on the workpiece, tighten the clamping lever and you're done. However, looking at the tension direction of the claw, it quickly becomes clear why its use is so dangerous.

The clamping force of a clamping claw points from top to bottom, ie in the same direction as the Bohrvorschub. It does not directly counteract any force that occurs during drilling. Only the friction caused by the pressing force between the table and the workpiece prevents the workpiece from twisting. Estimating the applied frictional force barely. Especially when drilling, it is important, the workpiece against a twist to secure.

Column Drilling Machine, Pillar Drilling Machine or Bench Drilling Machine?: bench

Always secure workpieces sideways in a machine vice

On attack can be very helpful here. This prevents at least in one direction a possible rotational movement of the workpiece. However, there is still a risk that the drill bends and the workpiece moves away from the stop. The safest method of clamping during drilling is the machine vice, Securely secured to the drill table, it holds the workpiece from two sides and twisting is absolutely impossible. Not even a lot of clamping force has to be applied. Even with some play, the workpiece could move slightly between the jaws, but not turn.

Author: Riccardo Düring

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