SDS (SPECIAL DIRECT SYSTEM) DRILLS
V. Ryan © 2006
SDS (Special Direct System) Drills are extremely
powerful and used when extra power is required, for heavy duty jobs.
They have three basic functions that allow normal drilling, hammer
action and chiselling. Furthermore, SDS Drills can hold large diameter
drill bits well passed the 13mm diameter limit of normal drills.
Professionals tend to select this type of drill for major projects. |
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1. The cord is
carefully laid out so that it cannot trip the person using the drill.
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A basic SDS Drill is shown below. Even basic drills are provided with necessary fitments such as a front handle. It is strongly recommended that the front handle is always fitted before use . SDS Drills should not be used in one hand, it should be firmly supported by both hands in order to take the weight. Adjustments to speed can be made by the speed control dial whilst ‘hammer’, ‘normal’ or ‘chisel action’ can be selected by altering the position of the lever at the top of the drill. |
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TYPICAL SDS DRILL CHISEL | |
A range of chisels are supplied for SDS Drills. A typical chisel is shown opposite. The shaft is the part that locks into the chuck of the drill. The chisel point is ‘ground’ to a suitable angle (normally 60 degrees). This type of chisel could be used to ‘chip’ away concrete or stone. |
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