Homeliness, Tools and equipment
Grinder for wood: how to choose a device?
Grinding is a rather laborious and monotonous process. It is often necessary to process a large surface, and it is very difficult to cope with such a task with a manual mechanical tool. That's why a sanding machine for wood was created. This tool can smooth the surface, remove burrs, make it even, remove paint and varnish, etc. In general, the thing is multifunctional and in everyday life, no doubt, useful.
What Everyone Should Know
Today, no one is working on the wooden bar with the emery. This is a really outdated method, which, although effective, does not give the proper result. It should be understood that with each year the finishing coatings become more and more thin-layered, and any roughness on the wooden surface will be clearly visible. Of course, a wood sanding machine for home use is not the most expensive, but we'll talk about this a little lower. It's another matter if you work in the production sector, where you have to process wood billets every day. Here the choice is obvious - the tool should be professional. But in general, you can talk about relatively small costs, although much depends on the manufacturer.
Let's try to understand with you which sanding machine to choose and what to look for when buying. Here, not everything is as complicated as it might seem at first glance.
Professional grinders
Units of this type are produced by many well-known companies that are engaged in the production and sale of construction and household tools. The key features of such equipment, as a rule, are the modes of operation. Usually professional grinders are designed for long-term trouble-free operation. The dimensions of the equipment are much larger than the non-professional models, which is due to the increased engine power.
As for the build quality, it is also at a high level. True, any household model should also be reliable. A large number of modes of operation, the ability to adjust the working element (the speed of its rotation) and much more - all this is in professional models. As for the price, the grinder for wood of this type is very expensive.
Household grinders
Such a tool is not intended for permanent work. The engine of the machine will not withstand a long and trouble-free operation. On average, the resource of work per month should be no more than 20-30 hours. At the same time the power of the unit is small, therefore, it is very convenient to work with such a tool, which is due to small dimensions.
It is recommended to give a rest to the sanding machine every 15 minutes of work. So you can significantly reduce the harmful thermal effects on the engine and avoid overload. As for the advantages of such solutions, it is compact, lightweight and easy to operate. Of course, here you are unlikely to find a large number of additional functions, but they do not need to perform simple work. Well, now, in more detail about how to select a sanding machine for wood, and what are the variations of this tool.
Types of household grinders
Currently, manufacturers are trying to come up with all the new types of such tools. The design features usually consist of different tool working elements, design elements, etc.
The most popular today are band grinding machines (LSM). They are used for rough processing of wooden, plastic and metal surfaces. If you need a softer, usually a secondary treatment, then it is recommended to use a vibration grinding (GSOM). The rectangular shape of the grinding surface makes it much easier to process the corner pieces of the workpiece and reduce labor intensity.
Another type is a delta sanding machine. Its key feature is the triangular shape of the sole. This allows grinding hard-to-reach parts of the workpiece (notches, grooves, etc.).
Well, the last kind is an eccentric car. It is used for final grinding. Usually after such processing the blank looks like a polished one. This is achieved through rotational-vibrational movements during operation. Such a tool is not suitable for a small surface with a complex configuration.
Belt sanding machine and everything about it
The band tool appeared the very first. It is designed for rough, primary processing. Usually it is used if you need to remove a thick layer of material, say, from a planed board. But in addition, LSM are suitable for precise machining of parts and cut lines.
The working organ consists of an annular abrasive belt, which is stretched on rotating rollers. Depending on the grain size of the tape, a certain layer of material is removed. In general, the principle is similar to the work of a plane, only efforts need to be applied much less, and the work is done faster.
About the abrasive tape and useful functions
Strangely enough, you still need to be able and correctly choose an abrasive tape. On sale there are two of its kind. One tape has an abrasive layer of aluminum oxide, and the second - zirconium. The first view allows you to gently handle the surface, leaving a minimum number of scratches. A ribbon with an alumina abrasive is best suited for processing wood blanks. Zirconium tapes are also good in their own way. With their help you can relatively quickly, but roughly remove the thick layer of material. However, we will have to accept that scratches will remain on the surface. This tape is good for metal parts, and also suitable for sharpening the tool.
As for the additional functions, it is desirable that there is a possibility of smooth adjustment of the speed of rotation of the tape. This will allow you to maximally adapt to work with materials of different hardness.
But the presence of additional functions affects the cost of equipment. For example, the grinding machine "Interskol Pshm-115" without additional features will cost 2500 rubles at an engine power of 0.3 kW. A similar power tool, but already with a smooth adjustment and some other functions, will cost 3000 - 3500 rubles.
Eccentric grinding machine: advice on choosing
Orbital grinders have a similar operating principle with triangular GSM. But the trajectory of movements in this case is somewhat different and allows for a more fine grinding. The productivity of eccentric machines is somewhat greater than that of GSOM.
If you decide to buy such a tool, you should understand that you need a 150 mm diameter disc. Capacity in the 0.2-0.65 kW for household use will be more than enough. It should be noted that the eccentric grinder has a vibration speed of up to 24,000 per minute. That is why smooth adjustment in this case will be extremely useful function. If you plan to work indoors, then choose machines with holes in the sole to dump the dust. This function will be very useful.
About the choice of GSOM
The operating principle of vibrating sanders is to perform oscillatory movements with an amplitude of not more than 5 mm. On the sole there are special clips or Velcro that allows to fix a sheet of sandpaper. From the granularity of the latter, the quality of the processing of the wooden surface depends. The more grain, the faster you can get the desired result. But in this case, the work will be performed roughly, therefore, secondary processing with a small grain will be required.
The vibratory grinder "Makita", for example, is very high quality and popular both among professionals and amateurs. This technique has reliable anchoring of the abrasive to the sole, which is very important. If you are going to engage in fine grinding, then the amplitude of the oscillation should be in the range of 1.5-3 mm, for rough processing 4-5 mm. Be sure to consider this when buying. Virtually any grinder "Makita" allows you to adjust the amplitude of vibration in a wide range from 1.5 to 5 mm.
In more detail about the choice
The purchase of such a tool should always be carefully and slowly. For example, when buying Chinese equipment, one can hardly expect a long service life. But even such a tool can be qualitative. However, it is best to give preference to European producers. That's why, before you choose a grinder and buy it, look at which company is the manufacturer.
For example, German products "Bosch" is practically unrivaled. It combines high quality assembly, accuracy during grinding work, competent ergonomics and much more. In general, the grinder Bosch though and very expensive, but rather qualitative. As practice shows, it is the equipment from this manufacturer that has the least problems, and if they arise, they are solved quickly.
In brief about the rates
So we went on to the most interesting - quotations. As noted at the beginning of this article, the amount depends largely on the manufacturer and the unit's functionality. Household models usually cost between 2000 and 5000 rubles. The first are more simple and less functional, the latter allow performing complex work with high accuracy. Much depends on who produced the sanding machine. The price of Bosch equipment is 15-20% higher than Interskol. But you have to pay for quality, it must be understood.
Conclusion
We figured out how to choose a sanding machine for wood. At the first stage, we determine its type. Then it is necessary to give preference to this or that manufacturer. By the way, it will be useful to read reviews on thematic forums, so you can get a lot of free useful information. For example, repair of a grinder from some manufacturers can be difficult due to a lack of spare parts, which is not very good. After you have decided on the manufacturer and type of machine, as well as its technical characteristics, choose the best option for the price.
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