Introduction:

SDS drills stand for special direct system drills, which are normally used for their effective performance against heavy-duty jobs


SDS drills:

This system was developed by Bosch in 1970s. The name SDS has a German origin where it is stated as 'stek -dreh- sitz', which translated means 'insert-twist-stay'. This special type of drill performs three different actions. They drill, have a hammer action and even allow chiseling. These types of drill are therefore used for larger projects. The SDS works in a very systematic way. They make use of cylindrical shank, which are held by chunks. A tool is then inserted in the chunk and locked firmly n the desired place. However, the diameter of the shank should be the same as the chunk. The design also permits smooth hammering operation. There are three standard sizes in SDS drills, namely SDS- plus, SDS- top and SDS-max. The sizes of the drills depend upon the size of the shanks. They also differ upon three operational levels of drill only, drill and hammer action, and hammer only action. Each size or variations of SDS drills have their own unique strengths and capacities. Therefore anyone interested in SDS drills should be aware of his own requirements and choose the drills accordingly. Many SDS drills come with the advanced technique of chiseling. A range of chisels are provided with SDS drills. These chisels are normally used for chipping away stone and concrete or any other waste material.


Advantages:

SDS drills tower over all other drills in terms of energy, durability and efficiency. They are able to deliver hundreds of times of energy with every hammer blow. Because of its unique design, they are able to control the problem of bit slip and are able to withstand the force of hammer in the process. They are also preferred for huge operations. They have astonishing and drill holes in mater of seconds. It is the best possible drill for drilling through concrete and masonry.


Disadvantages:

SDS drills are expensive as compared to other masonry drills. Because of their size and strength, they are not suitable for use in confines or awkward places. They are unnecessary for small drilling operations.

Despite the disadvantages, the balance lies in the favour of SDS drills. They are specially gaining popularity in industrial sectors and large warehouses.

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