Chuck type
The type of chuck used in the power drill (see "Type"). Different types of cartridges differ mainly in the way they open / close:
— Key. Drill chuck with classic round shank, opened and closed with a special key. Such a chuck is considered somewhat more reliable than a keyless chuck and is better suited for working with hard materials at high torques. On the other hand, replacing the drill in it is not so convenient, and if the key is lost, it is generally impossible.
— Quick release. A chuck that can be opened and closed manually without the use of keys. Just like the key, it is designed for round shanks. The main advantage of keyless chucks is obvious: it is more convenient and faster to change drills in them, moreover, this possibility does not depend on the presence of a key. The disadvantage of this option is a slightly lower reliability of holding the drill; however, this is often not critical even in the case of power drills, originally designed for heavy work.
Engine size
The working volume of the motor-drill engine.
A larger volume (with the same type of internal combustion engine, see above), on the one hand, increases power, on the other hand, increases fuel consumption. However, in general, this parameter is a reference, and when choosing it is worth paying attention to more practically significant indicators — power, speed, gear ratio, etc.
Drill bit included
The presence of a working attachment - auger (auger) or drill -
is included in the delivery set of the tool.
Purchasing such a set eliminates the need to look for a drill separately, and besides, the standard attachment, by definition, corresponds to the diameter of the drive shaft (see above). The characteristics of the complete drill must be clarified before purchasing, because they may not meet the buyer's requirements. In light of this, some tools are available in two configurations - with and without a drill, which is important to consider when purchasing.
- For the ground. A working attachment of an auger design for performing excavation work - cutting holes, holes, etc. in the soil. The auger is screwed into the ground using the self-tapping principle and with each turn around its axis it cuts off a dense mass of soil. As the tool deepens, a pit with a circular cross-section and smooth walls is formed. Its depth depends on the maximum length of the drill, its width depends on the diameter of the working nozzle.
- For ice. Ice drills are equipped with an auger with sharper blades than those of ground working attachments. As a result, they effectively “bite” into the ice, making holes in it of the required diameter and depth. Ice augers are often used in addition to light motorized augers, which are supposed to be used for winter fishing.
Included drill diameter
The diameter of the working nozzle supplied together with the motor drill "out of the box". A drill or drill should be selected according to this parameter based on the maximum diameter of the required holes, as well as the penetration depth of the working tool.
