Comparison Elprom ELShM-920 vs Elprom ELShM-1210

The power consumed by the grinder during operation. Usually more than the output (useful) power (see above) due to losses during the conversion of energy from electrical to mechanical. However, the general patterns in this case are the same: a more powerful tool, on the one hand, is usually more performant, on the other hand, it is heavier, larger and more expensive. In addition, the total electricity consumption depends on this indicator; however, grinders, even the most powerful ones, consume relatively little energy, and difficulties can arise only when connecting a high-performance professional tool to weak electrical wiring.

Note that it is much easier to determine the consumed power than the useful one; therefore, only this parameter is often indicated in the characteristics, without specifying the useful power. In general, it is quite possible to compare grinders of the same type using it (see above): a modern tool has approximately the same efficiency, and in most cases the useful power values bare related in the same way as the consumed values.

Belt speed provided by the grinder. For more information about belt units, see "Type". In this paragraph, both one value and a range can be given — if the device has a speed control (see "Additionally — Speed regulator").

Other things being equal (primarily the same belt width), a higher speed has a positive effect on productivity. On the other hand, to ensure such a speed, a more powerful engine is needed, which accordingly affects the weight, price and energy consumption of the entire tool. In addition, the low belt speed contributes to accuracy: the chance of removing excess material is reduced. So it’s definitely worth looking specifically for a “fast” grinder only if it is to be used often and for large volumes of work. In other cases, a slower model may well be the best option. More detailed recommendations on this matter (including for different materials and types of work) can be found in special sources.

The length of the belt or sheet for which the grinder is designed.

Working nozzles in the form of sheets are used in units with a vibrational principle of operation, in the form of tapes — respectively, in tape ones (for more details on both, see "Type"). Anyway, this paragraph does not indicate the working length of the tape / sheet (that is, the length of the surface adjacent to the material being processed), but the total — that is, the size of the nozzle itself. This size in itself determines only the compatibility of the grinder with certain sheets / tapes. At the same time, clamp-like fastenings (see "Sheet fastening"), used in most classic vibrating instruments, often allow you to install sheets of slightly longer lengths than indicated in the specifications. Hook-and-loop models (mostly delta sanders) technically accept both longer and shorter sheets, although in fact this is not recommended at best. But in tape tools, the length of the tape must exactly match the parameter specified in this paragraph — even a slight deviation can lead to incompatibility.

As for the working length of the tape / sheet, it inevitably turns out to be less than the total (for sheets — not much, for tapes — quite significantly). However a longer tape/sheet often has a greater working length; however, with the same general dimensions of the nozzle, its working size in different tools may be different; it is indicated in the item "Sole Size" (see below).

— Additional Handle. A separate handle for the second hand. In theory, such equipment may make the tool more comfortable to hold with both hands. However, in practice, the absence of an additional handle is often not critical: many tools without it are either designed for one-handed use (like some straight grinders, see "Type") or have other attachments for the second hand (such as a protrusion on the body). So, to answer whether you need an additional handle, you should consider the type and size of the grinder, as well as the specifics of the intended projects. Note also that by default, such a handle is designed for right-handed use, and the possibility of using it in left-handed operation needs to be clarified separately.

— 3-Position Additional Handle. An additional handle installed on a detachable mount and having three installation options: on the left (traditional option for right-handed use), on the right (for left-handed use), and on top (for specific cases — situations when you need to periodically change grip, work in hard-to-reach places, etc.). This function provides extended possibilities for tool customization according to personal preferences. It is mainly found in angular models (see "Type").

— Charger (C). A device for charging the battery in a grinder with the appropriate power type (see "Power Source"). This section usually specifies...the specific model of the charger. Having a "charger" included relieves you from the need to search and purchase it separately; moreover, such a charger is optimally suited at least to the "native" battery, and often to other compatible batteries. The details on the model will be useful primarily in case the included charger is lost or fails, and you have to buy the same or a similar one instead. Moreover, knowing the model of the charger allows you to find detailed data about it and assess the characteristics and features (compatibility with various batteries, additional functions, etc.). At the same time, the configuration "without charger" is also quite popular — see below.

— Without Charger. This feature is indicated exclusively for battery models (machines with other power types — see "Power Source" — by definition do not have a charger, so this point does not need to be clarified for them). The meaning of such a configuration is that modern grinders most often use standard batteries, which also fit other power tools of the same brand and are thus designed for standard "chargers." Thus, if there is already a battery tool "in the household" — the charger for it may turn out to be suitable for the grinder, and you will not need to pay extra for a second copy of the charger. And even if there is no charger available — it can usually be purchased separately without much difficulty (and some tools even allow you to choose the most suitable model of such a device from several options).

— Case / Bag included. The presence of a case or bag for storing and transporting the tool in the supply kit. The case is a suitcase made of durable material and usually has space not only for the grinder itself but also for working tips and other additional accessories. The bag is soft, allowing it to be compactly folded when not needed. Check the availability of a case or bag directly before purchase.

— Dust Collector. A container for collecting dust and other contaminants generated during work. See "Additional — Dust Collector Connection" for more details.

— Extension Pole. A long pole significantly expands the "radius of operation" of the tool: with such equipment, you can reach greater heights, process a large area without moving the platform or other stand, etc. Such capabilities are mainly relevant when processing walls, so the vast majority of grinders with extension poles included pertain to wall sanders (see "Type").

The total weight of the grinder; for battery models (see "Power Source"), usually, it is indicated without taking into account the battery.

This indicator has two meanings. On the one hand, light weight has a positive effect on manoeuvrability and reduces fatigue during work — especially when processing vertical surfaces and ceilings, as well as in other situations where the tool has to be held on weight. On the other hand, for grinders with a vibrational principle of operation (see "Type"), used for processing horizontal surfaces, a significant weight is considered optimal: it allows the tool to fit closer to the material being processed, and also contributes to stability and retention. So when choosing such a model by weight, it is worth considering the features of its intended application.