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Comparison Craft CBH-1100 DFR vs Sturm Professional RH2592P

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Craft CBH-1100 DFR
Sturm Professional RH2592P
Craft CBH-1100 DFRSturm Professional RH2592P
from $49.12 up to $63.28
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from $70.92 up to $73.20
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Operating modes
hammer drilling
drilling only
chiselling (demolition hammer)
hammer drilling
drilling only
chiselling (demolition hammer)
Specs
Power consumption1100 W1200 W
Impact energy3 J3 J
Number of thrusts5500 bpm4400 bpm
Rotation speed1300 rpm1100 rpm
Reversebrushbrush
Motor locationhorizontalhorizontal
Chuck
Chuck type
SDS+
keyless
 
SDS+
 
key
Quick chuck change
Wood drilling max. 30 mm30 mm
Metal drilling max. 13 mm13 mm
Concrete drilling max. 26 mm26 mm
Features
Functions
safety clutch
power button lock
safety clutch
power button lock
General
Power sourcemains (230 V)mains (230 V)
In box
additional handle
 
case (bag)
additional handle
depth gauge
case (bag)
Power cord length2 m
Weight3.1 kg
Added to E-Catalogmarch 2014january 2013

Power consumption

Rated power consumed by the rotary hammer during operation. Usually, the maximum power consumption in normal operation is taken as the nominal power.

In general, the higher this indicator, the heavier and more performant the rotary hammer is, the more advanced its performance usually turns out to be. On the other hand, the electricity consumption of such tools is high. In addition, note that with the same power consumption, the actual set of individual characteristics for different tools may be different. For example, frequency and impact energy are inversely related, and for the same power input, higher frequency usually means less individual impact energy. So, according to this parameter, it is worth evaluating only the overall level of the instrument; for accurate selection for specific tasks, you need to pay attention to more specific characteristics.

Also note that power consumption data can be useful for some tasks related to catering — for example, if a construction site is powered by an autonomous generator and you need to estimate the load on this energy source.

Number of thrusts

The number of beats per minute provided by the punch. For models in which the beat frequency can be adjusted, this item indicates the entire adjustment range, for example "1600 — 3000".

High impact frequency, on the one hand, increases the productivity of the tool and can significantly reduce the time required for work. On the other hand, with the same engine power, an increase in the number of strokes per minute leads to a decrease in the energy of each stroke. Therefore, among heavy performant devices, a low frequency is often found — up to 2500 beats / min and even lower. And the ability to adjust the frequency of impacts allows you to adjust the hammer to the specific situation, depending on what is more important — productivity or the ability to cope with hard, stubborn material. For example, for old crumbling brickwork, you can set the speed higher, and for working with stone or dense concrete, it is better to reduce the frequency of impacts by directing engine power to increase the energy of each impact.

Summing up, we can say this: when choosing a perforator, you should focus on both the number of strokes and the impact energy. Detailed recommendations on this subject for specific situations can be found in special sources.

Rotation speed

The speed of rotation of the working equipment provided by the rotary hammer. Usually, this indicates the speed at idle, without load; rated load speeds can be further specified in the characteristics (see below), but this is rare, and this parameter is still considered the main characteristic. It is also worth mentioning that in the presence of a speed controller (see "Functions"), the maximum speed value is given here.

When working in the main mode — drilling with impact — the rotation of the equipment is used mainly to remove waste from the hole, and the revolutions here are of no fundamental importance (they can be very low). Therefore, it is worth paying attention to this indicator mainly in cases where the rotary hammer is planned to be often used for conventional drilling, without impact. And here it is worth proceeding from the fact that high speeds increase productivity and contribute to accuracy when working with some materials, but reduce torque (compared to tools with the same engine power). So for heavy work with hard, stubborn materials, relatively "slow" tools are usually better suited.

Note also that drilling is not the main task of rotary hammers; therefore, their rotation speeds are noticeably lower than those of the same drills. On the other hand, in this case, low speeds are often compensated by powerful engines and high torque, which makes it possible to effectively drill holes...of a fairly large diameter, including using crowns.

Chuck type

The type of cartridge used in a rotary hammer to hold a working tool.

SD+. Abbreviation for it. "Steck-Dreh-Sitzt" — "insert-turn-fixed." Today's most common rotary hammer chuck, used in low and medium power models. It has a 10mm diameter shank with 4 slots and accepts tools from 4 to 26mm in diameter and 110mm to 1000mm in length. The advantages of SDS + are the reliability of fastening and convenience when changing tools — it does not require additional devices such as keys. The main drawback is the significant beating of the tool during rotation, due to which such a cartridge is very poorly suitable for drilling.

SDS Max. Modification of the SDS + cartridge (see above), intended for use in powerful professional models. It has a shank diameter of 18 mm and allows the use of tools with a diameter of up to 55 mm; otherwise similar to SDS+.

SDS-Quick. A variation of the SDS cartridge (see above), in the shank under which protrusions are used instead of grooves. It is also possible to install tools with 1/4" hex shanks in such a chuck. The most common tool diameter for SDS-Quick is 4-10 mm. This chuck is used relatively rarely.

Quick release. Chuck for holding drills and other tools used in drilling holes. The design is similar to those used in electric drills — it has 3 cams, it is designed for a too...l with a cylindrical shank without grooves, and hand force is enough to install / remove the tool. Such a cartridge is devoid of the main drawback of SDS — beats during rotation; this allows you to use the rotary hammer for drilling with good quality. On the other hand, it is much worse for chiselling than SDS. Therefore, keyless chucks are usually supplied as an accessory and are installed instead of the standard SDS chuck.

— Key. The presence of a special key cartridge in the delivery set of the rotary hammer, usually in addition to the standard SDS (see above). In terms of mounting design, this chuck is similar to the keyless chuck (see above) and is also designed for use in drilling. Its main difference lies in the method of installing / removing the tool: you can’t do this with your bare hands, you must use a special key to compress / unclench the cams. Such a system is somewhat more reliable than a quick-clamping system, but much less convenient: changing a tool takes a lot of time, and the key can be lost.

Quick chuck change

Possibility of quick replacement of the perforator chuck — usually from a regular SDS to a quick-clamping one (for more details, see "Chuck type"). Such replacement is carried out in a few seconds and does not require additional tools.

In box

- Additional handle. The puncher has an additional front handle, usually located at the base of the cartridge. This handle can be non-removable or removable, rigidly fixed or movable. Holding with two hands for two handles is much more convenient than for one and the body, because. allows you to optimally distribute the load on the hands; this is especially important for long-term work and the processing of "heavy" materials.

- Depth stop. A device that allows you to make recesses of a strictly defined depth at once, without constant measurements and without the risk of drilling deeper than necessary. It usually looks like a rod attached to the body of the puncher parallel to the working tool. In use, this rod extends to such a length that when the desired depth is reached, it rests on the surface of the material being processed, preventing the drill from moving further.

- Chisel. Complete nozzle for impact work with a perforator in the manner of chasing, leveling hard surfaces, beating tiles, bricks, concrete, etc. For different tasks, various types of chisels are produced - flat, spade, groove, crushing peaks with a sharp tip.

Bur. The presence of a drill in the delivery set of a tool designed for processing various hard materials due to drilling with impact. The purchase of such a set eliminates the need...to look for a drill separately, however, the characteristics of the complete nozzle must be clarified before purchase, because. they may not meet the requirements of the buyer.

- Charger. The presence of a charging unit in the configuration allows you to charge the batteries. Accordingly, for models with batteries, this accessory is necessary to power the battery. However, there are models without a charger. And punchers with it may differ in the model of the charger, the name of which will allow you to learn more about its characteristics and, if necessary or as needed (breakdown), buy a similar one.

- Case included. The presence of a special case in the delivery set, which facilitates storage and transportation: it provides protection against shocks and adverse conditions (moisture, frost), is equipped with a special carrying handle, in addition, along with the punch itself, a set of working tools can be placed in the case, replaceable cartridges, etc.

- Dust collector. The presence of a special dust collector in the delivery set of the perforator. As the name implies, it is designed to collect the dust generated during operation, which can otherwise create a significant inconvenience. Usually looks like a bag or container attached to the body; can be either replaceable (thrown away with the collected garbage) or permanent. The dust collector slightly increases the weight and dimensions of the puncher, however, if necessary, it can be removed.

Power cord length

Power cord length for mains powered drills (see above). The longer the cord, the farther from the outlet you can use the unit and the less it depends on the location of the outlets.

Weight

The weight of a fully assembled rotary hammer (in the case of battery power, with a standard battery installed). Unlike many other types of equipment, in the case of rotary hammers, light weight is far from always an advantage. So, heavy models are better suited for professional use — they are less prone to vibrations and, usually, are stronger, which is important when working with difficult-to-cut materials for a long time. But for small, simple works of short duration, a lot of weight is not required, and in this case, light models are useful, which do not require significant effort to hold on weight.
Craft CBH-1100 DFR often compared
Sturm Professional RH2592P often compared