Belt grinder - is a desktop machine, which is usually used for grinding a variety of flat surfaces. A device of this type has many advantages and has a versatility that makes it very popular among domestic masters. The cost of such actuators is quite high, so the choice of grinder is recommended to be treated with the utmost seriousness.
Belt grinder - a device used for grinding and polishing
Content
1 Grinder: what it is and for what purposes it is used
2 Belt grinder: the main advantages and disadvantages
3 What kinds of grinders are found on sale
4 What is a grinder: the design features of the machine
4.1 The operating principle of grinder: how is resurfacing
5 What to look for when choosing a grinding grinder
6 The main varieties of rollers for grinder
7 The choice of grinder: tape size for grinding workpieces
7.1 How to perform a replacement tape Sander-Grinder
Grinder: what it is and for what purposes it is used
This term refers to the grinding device used for treatment of metals (and other) components. Machines that belong to this category, are stationary. In their design is provided an electric drive, by means of which the operating element is actuated. This device is most commonly used for these kinds of works:
Most often grinder used for metal, but may also be used for sanding wood and glass
grinding;
sharpening;
rust remover;
elimination of burrs.
Many home masters use such Equipment for sharpening knives. The effectiveness of this device is very high, so you can take the inexpensive model unit for such a simple task. Many experts do not advise to buy this type of machine to perform a single task, as this is extremely disadvantageous. Before buying a particular model is recommended to study for her reviews. Grinders, located in the lower price segment, may be ineffective, it is not recommended to save much on this purchase.
With grinder can bring the metal surface to the desired state: grind it, to eliminate a variety of defects, and also to eliminate unnecessary sharp edges. The cost of such devices is on average 17 thousand. rub., which is quite expensive. As a result, many people decide to assemble such a device with your hands. Belt grinder in its design is very similar to the type of hand sander. A drive device being a key element that drives the pulley, which is provided with an abrasive tape.
What else can use this type of machine? In addition to the treatment of metal cutting tools, in such a unit can perform polishing of products made from other materials. For example, it is often used for machining of stone and glass. If desired, one can use the grinder for aligning glass edge or grinding of wood.
The device is suitable for grinding, polishing, removing rust and burrs
Such a grinding machine enables to remove the layer of rust, paint or varnish, which is also considered a very useful property. In addition, it can be done by hand. Drawing homemade grinder can be found on any profile forums. Such a machine is the most efficient solution, if there is a need for polishing the metal tube, the edges of the lining parts, as well as their sharpening.
Belt grinder: the main advantages and disadvantages
Any equipment used in the home or professional workshops, has its pros and cons. Such machines are also not an exception to the rule. The first and perhaps the most significant advantage of grinder is in its universality. Some models can be used for a large number of tasks, such as grinder from Chapaya.
Another advantage of such equipment is a result of its construction. The concern is that the working area is not overheated during grinding. An increase in temperature - drawback, the majority of grinding units. Moderate heating is achieved by the dimensions of the working element (pulley). Wheel dimensions contribute to its cooling when driving outside the operating point.
All surfaces of the desktop machine is a ground, which is also considered a major advantage. This feature makes its operation as simple and convenient. Belt sanders grinders have a smooth ride that allows you to evenly process the metal parts and products made from other materials.
The main advantage of the belt grinder - is its versatility
Equipment manufactured by industrial methods, has a high accuracy location of the rollers. This reduces the likelihood of misalignment of the abrasive belt in the pulley movement around its axis.
Less any factory grinder, of course, is its cost, which is far from democratic. Today, however, there is a possibility of purchasing prefabricated components, which includes all the necessary components (except the engine). One of the most popular sets is the belt grinder "Mastak", the price of which is only 7 thousand. rub.
Finally, it is worth noting the special design of the pressure pad. Desktop machines of this type are designed for machining of parts, which differ not only in material but also in form.
What kinds of grinders are found on sale
Grinding device equipped with a drive, are widespread in the market today. The range of different models is quite broad. They differ from each other in their design, power, and cost. When choosing a particular model, you need to pay attention to these criteria.
Belt grinders are industrial and domestic use
It is also worth considering the operational membership of such units. Some of them are used for works of high complexity, which is not possible to perform a manual grinding equipment.
The simpler option is ideal for knife sharpener. Grinder for this purpose can be purchased at the online store, which is very convenient. Purchase of such equipment in the Internet network and has one drawback - the impossibility of carrying out consultation with the seller. Thus, depending on the operational units belonging distinguished:
industrial;
home.
All devices of this type have a drive mechanism. However, drive power can be different. This is another criterion by which the differentiation of belt grinders. It should also be noted that the tape is provided with an abrasive material, may have a different length. Figure width of that element, too, is different.
Units of different design, capacity, cost
When choosing a particular device should pay attention to its brand. The most popular brands combine a reasonable cost and good quality. The largest number of positive reviews have belt grinders "Lefty" and "Mastak".
The number of revolutions - characteristics that influence the speed of movement of the grinding belt. The lower the value, the less the efficiency of the device. During operation, this indicator is often required to reduce, to eliminate the possibility of overheating the tape and the workpiece.
What is a grinder: the design features of the machine
Such a machine has a simple device. The configuration may vary depending on the model, however, the basic structural elements remain unchanged. The simplicity of these units is the main reason that they are often carried out independently of the available tools. At home, this unit can be made on the basis of a conventional electric motor from an old washing machine. The composition of the standard grinder includes such structural elements (in addition to the engine):
frame;
Pulley;
a mechanism for tensioning the abrasive belt;
clamping area;
reverse thrust.
Standard grinder consists of a device for tensioning belts, rollers, frames, and stops the presser pad
The last item is very important, since it eliminates the possibility of rupture of the tape which may occur under the influence of excessive pressure during processing of the workpiece. Photo grinders allow you to visually assess their simplicity and dignity, and quickly understand the design of such units.
The simplest versions of such equipment include in its structure only one drive roller. Professional model, which can be found in small industries, may have 2 or 3 of the roller. In this case, a definite pattern is traced: the more rollers the device has, the longer it abrasive belt.
Tape length - an important criterion, since it affects the duration of the operation of the consumable. Short tapes need to be changed frequently, which is not very convenient. In turn, the use of a longer consumable not only reduces the friction rate, which affects the shelf life, but also reduce overheating. In any case, the figure is chosen depending on the purpose of operating the device. With occasional use Device for sharpening knives, Axes and scissors, the need for a long tape is missing.
Such equipment is indispensable for nozhedelov. Belt grinders can cope with a large amount of work. During operation, the factory assembly work piece rests on the table, fixed on the frame, which allows for more precise grinding. It should also be noted that the industrial versions are equipped with a special glass, which performs protective function, preventing the person from the master sparks.
Often belt grinders do personally because of the simplicity of their design
Note!Over time, the belt grinder losing their previous specifications and stretched. To resolve this problem in the present plant equipment tensioning mechanism by which adjustment occurs consumable.
Separately, it must be said that the market can meet the universal equipment, combining the characteristics of not only the grinder, but other sharpening machines. Grindstone with grinder does not provide for a separate mechanism off. Its main drawback - the high cost.
The operating principle of grinder: how is resurfacing
The principle of operation of these units is quite simple. It can handle any man who does not have special knowledge and skills. The operation of this device is an electronic motor. When activated, the rollers are activated. It is important to remember that the drive roller can be only one. Others are slaves.
The resulting thrust is transmitted to the abrasive belt, which results in the last movement. In the design of such equipment provides an opportunity to regulate and control the driven rollers. This greatly simplifies the work of the machine. Belt grinder in use produces a lot of dust. This is especially noticeable in the processing of workpieces made of wood. This problem is solved, simply use a handheld vacuum cleaner or any equipment for blasting.
The principle of operation of the belt grinder for grinding and sharpening
Members note the ease of use of the desktop machine. Responses about him mostly positive. In the case of operating a home-made device is recommended to adhere to all required safety regulations. The operator must be remembered that the absence of the screen on the machine, manufactured in the home can lead to the ingress of dust and sparks in his eyes. Therefore, when using hand made-grinding machine must be prepared in advance goggles.
Over time, the abrasive belt, as mentioned above, the wear and stretch. There are several tension mechanisms which negate the problem. At the heart of such a system can lie or special spring the locking member.
What to look for when choosing a grinding grinder
Selection of the appropriate device depends on many factors. Experts recommend to evaluate the size of blanks and the choice of the unit to focus on these indicators. It is also very important to consider what items will be processed using such equipment. For a variety of types of surface grinders special models are used. As an example, devices that are polished convex preform.
The following selection criteria is purely individual. We are talking about the frequency of use of the grinding machine. For a rare operation suitable low-cost model. It should be noted that there are special nozzles, grinders, which are mounted on angle grinders (Bulgarian). Their price is much lower than the cost of a full-fledged machine, and the efficiency is quite high.
First choose the unit, you need based on the size of workpieces to be processed on it
Power unit - one of the most important parameters that affect the speed and efficiency of operation. Today, the market can find devices whose power ranges from 0.5 to 1.5 kW. For use in the home, as a rule, enough power 0.5-0.8 kW model. If the unit is purchased for frequent use, it is worth paying attention to modification, that of which is 0.8-1.2 kW.
On the operational characteristics of specific models and how to use them can be found in the thematic video. Grinders made from readily available materials, can be of different capacity. It all depends on what kind of electronic motor has been taken for this purpose.
Related article:
Lathe for metal for home: varieties and specifications
Features and benefits of the device. Overview of TV-4 machines, TV-6 and TV-7. CNC. Recommendations regarding the selection and prices. Work on the machine.
When choosing a tape drive of the machine used for grinding, also pay attention to the belt speed. This technical feature can be seen in the data sheet. It affects that some will have a capacity of the unit. Price belt grinder indication of the extent of its effectiveness. Depending on the speed indicator can distinguish three types of grinders:
200-360 m / min;
360-500 m / min;
500-1000 m / min.
For household use the device must acquire capacity from 0.5 to 0.8 kW
The last two options are not applicable in the home. Masters also recommend pay attention to the weight of the device, if it will be used for the treatment of vertical surfaces. This is due to the fact that such work involves holding the machine on the weight. There are two categories of grinders:
from 2.5 to 4 kg;
4 to 7 kg.
The last thing you need to familiarize yourself with the additional functionality of the unit. It should be remembered that the number of additional modifications affects the final price of the grinder. For example, a device equipped with a soft start, much more efficient and convenient. Another useful feature is the system alignment. For home use it is recommended to select models equipped with stationary fasteners and auxiliary handles.
The main varieties of rollers for grinder
In the design of modern stationary electric devices importance is given to the rollers or rollers. They are driven by a motor. Passed therethrough tape having an abrasive layer of grinding workpieces. As a result, the tape is moving, which makes it possible to work for such a machine.
Rollers or rollers for grinders are primary and secondary
An output shaft which is structural element of the electronic engine joined to the drive roller of the drive device. All this detail is indicated in the drawings, grinders, which can be found in the Internet network. The rotation produced by the engine proceeds to the drive, and then on the auxiliary (driven) rollers. Thus, there are only two kinds of rollers: primary and secondary.
The position of the auxiliary rollers can be adjusted, allowing you to control the depth of grinding. Tensioner mechanism being compensatory system, located on one of the rollers. It is because of this movie called tension. Failure of such element can be made independently. Rollers for the grinder with their hands can perform improvised, but their replacement cost is not so great.
The rollers of the drive unit table used for polishing and grinding, are important elements in the design. Their function is to maintain and even distribution of tension of the abrasive belt.
The choice of grinder: tape size for grinding workpieces
Dimensions abrasive strip must necessarily conform to operational purposes. It is important to understand that the size of the products to be processed on the machine - the most important factor when choosing a tape. There are three main characteristics of these bands:
The tape should be chosen depending on what kind of products will be processed on the machine
grain;
length;
width.
The length of the ribbons, which can be found on the market today, ranges from 610 to 1830 mm. In turn, there are only two widths, namely 50 and 100 mm. The smallest abrasive strips found in grinder on grinders. The minimum length of the product very quickly wear out, it is worth bearing in mind when selecting the required tape.
Note!Abrasive band grinding on a mandatory basis should be an elastic base. The relative percentage of elongation of the material without rupture in quality product is at least 10%. When choosing grain also should focus on the purpose for which the band will be used. Such a product can be done at home, but often these tapes do not have a long operational life.
When choosing grain also should focus on the purpose for which the band will be used. Such a product can be done at home, but often these tapes do not have a long operational life.
The width of the tapes for tape grinder exists in two versions - 50 and 100 mm
How to perform a replacement tape Sander-Grinder
Replacement abrasive band in the grinding unit of this type does not require a lot of time. This is a fairly simple operation, which is sufficient for drop-down auxiliary rink. For this purpose it is necessary to press. Desired clip is fixed to a tensioning mechanism. As a result of this manipulation of abrasive belt slack and there is the possibility of its removal.
Make an abrasive strip for such a desktop machine you can own, but such work is quite complicated. The main problem is gluing the ends of the band with their own hands. Ribbon for grinder made at home can always bring in the most inopportune moment.
After removing the old product can start to pull the new runway. The first step is to create a new sanding material on the main video. Further, it should be set to the slave rollers, and then made his fixation. The last thing you need to do - throw a new band on the pulley, which is regulated by the tension mechanism.
Replacing the tape device does not require a lot of effort and time
How to glue the tape grinder with his own hands? It does not fit the normal superglue. This tape will burst at the seam during operation. The best option - to use a two-component adhesives.
Finished products of this type can be purchased at any specialized shop. They are sold already glued. There are two criteria by which one can accurately determine the reliability of a particular abrasive strip. The first is the quality of the crumb, which is glued to the surface of the belt. The second point on which to focus - bond strength band ends.
Machines of this type are characterized by simplicity of execution and use. Grinder - it's great for sharpening a variety of cutting devices used on the farm. In order to select the model, it is necessary to evaluate the budget and determine in advance how much power must have gadget. When using it, do not forget about the basic rules of safety.
