Comparison GTM AG52H-D vs Iron Angel MD3353M Profi 2001143

The gear ratio of the reduction gear installed in the drill. This parameter indicates how many times the gearbox reduces the rotation speed of the auger relative to the motor shaft. Knowing the gear ratio and the maximum engine speed, you can accurately determine the maximum rotation speed of the auger: for example, for an engine of 8000 rpm and a gearbox with a gear ratio of 40, the maximum rotation speed of the drill will be 8000/40=200 rpm.

In general, a higher gear ratio (for the same power and engine speed) allows to achieve more torque (at the cost of lower drive shaft speed) and allows larger augers to be used. At the same time, do not forget that the actual ability of a power drill to cope with difficult tasks also depends on other characteristics — primarily the mentioned engine speed and power. This must be taken into account when choosing.

Engine power of the motor drill in horsepower. Horsepower is traditionally used to denote the power of internal combustion engines. 1 HP approximately equal to 735 watts.

Power is one of the key parameters for any motor auger: the higher it is, the higher torque can be achieved on the drive shaft, the thicker augers can be used with the unit and the better it is suitable for complex work and “heavy” soils. On the other hand, high power significantly affects the price, dimensions and weight of the engine. Therefore, manufacturers choose this parameter based on the price category and general purpose of the tool.

The most modest engines, about 0.8 – 1.5 hp, are installed in power drills (see "Type") — for such devices, high power is not needed, but light weight and compactness, on the contrary, are critical. For motor drills, indicators are 1.6 – 3 hp. correspond to the entry level, 3 – 5 hp. — medium, and in the most powerful models, motors of 7 – 8 hp are installed, which makes it possible to work with screws with a diameter of half a metre or more. At the same time, note that units of the same power may differ in screw diameter and other performance characteristics.

Engine power of a motor drill in kilowatts. Watts (kilowatts) are a common unit of power, and this unit is also used for gasoline engines along with horsepower (see above).

Power is one of the key parameters for any motor auger: the more powerful the engine, the higher torque can be achieved on the drive shaft, the thicker augers can be used with the unit and the better it is suitable for complex work and “heavy” soils. On the other hand, high power significantly affects the price, dimensions and weight of the engine. Therefore, manufacturers choose this parameter based on the price category and general purpose of the tool.

Indicators of 0.6 – 1.2 kW are typical for the most modest engines, these are mainly equipped with power drills (see "Type"). In entry-level motor drills, more powerful units are used, by 1.2 – 2.2 kW, the average class corresponds to an indicator of 2.3 – 3.7 kW, and in the most solid devices, the power can reach 5.5 – 6 kW. Note that units of the same power may differ in screw diameter and other performance characteristics.

The speed given out by the motor drill engine at idle, with the throttle fully released. In this mode, the drive shaft, usually, does not rotate (the automatic clutch turns it on only when the speed increases), so this parameter has no direct practical significance. At the same time, it allows you to evaluate the engine speed range and some of its features; see "Maximum RPM" for details.

The volume of the fuel tank installed in the drill.

A larger tank allows you to work longer without refueling, but it significantly affects the weight of the tool. Given the peculiarities of the operation of motor drills, in fact it is easier to take breaks for refueling than to keep a large supply of fuel in the unit itself. Therefore, tank volumes are usually small, only in some high-power models this parameter exceeds 2 liters. At the same time, manufacturers take into account fuel consumption and select tanks in such a way that breaks do not have to be taken too often.

The maximum length of the drill (auger) or drill with which the tool is able to work normally; in fact, this is the maximum drilling depth available when using this model. Note that some models allow, if necessary, the use of longer drills, due to some tricks (you can read more about them in special sources); however, this possibility is far from being available everywhere, and when choosing, it is worth proceeding precisely from the length claimed by the manufacturer.

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.

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.

Nominal weight of the drill. Usually, the weight is indicated "dry", without fuel in the tank, and also without taking into account the auger or other working attachment. However, in some models, originally equipped with drills, the weight may be given for the tool with the nozzle installed.

According to this indicator, one can evaluate the general class of the tool: powerful engines inevitably turn out to be heavy, respectively, the heavier the motor drill, the more powerful it is, usually. A massive unit is more difficult to hold (and models weighing from 20 kg are initially made for two operators), but a large weight has its advantages — the tool gets more stable and less prone to vibrations.