Stand for a screwdriver or a drill for stationary use. The base is rigidly attached to the workbench and the tool chuck is connected to the nozzle shaft. Then it is possible to install different disks from the set and perform cutting, grinding, polishing and other types of processing of parts.
The fixture for angle grinders, or angle grinders. Thanks to the rigid fixation of the tool, the convenience and precision of the workpiece cutting is significantly improved. Clamping on the base allows you to securely fasten the parts and cut them accurately at 90° or 45°. Judging by the reviews, the bed is quite weighty and does not require additional weighting.
From the name it can be understood that the basis of the machine is not the movement of the grinding disk, as it is in standard units, but a special belt. Its peculiarity is that it can work both metals and wood, which increases the versatility of each such machine.
The advantages of the belt grinder include its compact dimensions, which makes it possible to place the belt sharpening device in the vehicle for transportation. It’s also lightweight, so moving it around the construction site or your vacation home is not a problem.
It’s impossible not to mention the small price and its range. It is small and depends on the manufacturer, which can be both domestic and foreign. Also, belt sharpening machines can be universal, which applies not only to the material to be processed, but also to the tools.
Principle of Grinder Design and Principle of Operation
To assemble the belt grinder with your own hands, you need at least a general idea of its design. In fact, there is nothing complicated about it. It is a conventional drive device with several rollers and grinding belt. It can be made of metal or plywood, or even plastic. The picture shows a drawing of the Grinder with dimensions.
- Motor AIR 80A2.
- Tension roller swivel assembly.
- Tensile spring.
- Straight roller.
- Tension pulley.
- Metal table.
- Grinding belt.
Typically, the design of the grinder includes a table with clamping elements, which is often installed on a workbench or stationary frame. It can rotate along its axis, and in some models. perpendicularly. In the frame is placed either a foot drive device, or the drive motor, which is attached directly to the grinder. often a junk with a “live” motor is used: an old drill, a grinder, there are many examples on the net where the Grinder is assembled by the hands using the motor from the washing machine.
The question as to whether the grinder had really “live” motors is still open. Note that in writing the article, even in experienced whole, not a single sheep has suffered!
Interesting fact! The longer the grinding belt, the more powerful motor for the machine will have to look for.
The principle of the grinder is simple. With the help of a motor, a group of rollers, one of which is leading, the rest. the slave. Under the action of the traction, the grinding belt begins to move. The design allows you to adjust the location of the driven rollers, which facilitates the work on grinding different surfaces.
Grinder, especially while working on wood, is strongly dusty, and many craftsmen use special vacuum cleaners or blowers for surface cleaning during the work
Over time, the tape can stretch, in order to ensure that the tension remains accurate, there are different systems of tensioning: it can be a spring, a special retainer or the most common furniture bolt.
Before deciding on the size of the belt and width of the rollers, think for yourself. what surfaces you plan to process, their size and the amount of work.
The abrasive belt for the grinder is the most important part of any grinder
The novice craftsman will not be superfluous to know that sanding belts differ in their length, width and degree of hardness (grit). Most often in machines of this type the following belt sizes are used: 610, 915, 1230, 1600, 1830 mm. length, width just two options. 50 and 100 mm, but experienced craftsmen can cut the belt of any width.
Important rules for selecting a grinder belt:
- Tape must be on elastic, fabric basis, otherwise it can not withstand the load and hurt you on the belly and hands.
- to withstand extreme angular speeds of at least 1500 rpm.
- Have a great abrasion resistance.
- Tensile Tensile Tension Limit. at least 15%.
- Resistance to heat during prolonged work.
Grinder: its construction and operating principle can be found here
What should be the grit of sandpaper for work
As you understand, different grinding belts are used for different materials. It is not about the form of release, but about the size of the grain, the way it is applied. The type of abrasive and how it is applied are of secondary importance. They have a major impact on the durability of the material. But as usual, better is more expensive. one has to make his or her own choice. But it is better to select the grit size for specific tasks.
Sandpaper for sanding wood for painting: the choice of grit size
What sanding sandpaper to sand the wood
In order to prevent the sandpaper from clogging, the grit should be applied at intervals. This is an open type of application. In this case, you do not have to “knock out” it often or change it. Paper or cloth. type of backing. Paper is cheaper, cloth more expensive. If you have a sander, see its recommendations. For manual work, you can fix the piece on a special holder or nail it to a block.
How to choose the grit size of sandpaper for woodworking
Recommendations on the choice of grit are given in the table. For primary processing, sandpaper from P40 to P80 is used. It is for shaping, removal of a thick layer. The same materials are used for removing paint and varnish from wood. Already P100 to P240 needed to prepare wood for painting. For sanding after the first layer of lacquer, take P360 or P400. And finishing to smoothness. polishing and varnishing proper. are quite fine P500 and higher. Generally, polishing is a separate issue, and you have to grind and paint or varnish it step by step. And with each time they take thinner and thinner grit. And polishing is completed, in general, with a soft polishing (felt) material.
What kind of sandpaper to process metal
For metal you have to take tougher abrasives, and thus more expensive. Ordinary corundum can cope with aluminum and its alloys. They also work on cast iron, bronze and black steel. For brass, you need at least zirconium, but preferably titanium or alloyed electrocorundum. And even better. ceramic. Note also that the application method should be closed.
For grinding and polishing metal needs another type of sandpaper, and grain size should be selected according to the type of work
The principle of grit selection is the same: for rough treatment, the rougher the coarse grain, the thinner the treatment, the finer the abrasive. The coarsest sandpaper is used to remove rust and smooth out basic roughness. The thinner the layer, the smaller the grit size. So everything is logically. But note that there are two or three grit sizes for each job. That doesn’t mean you have to take any of these. It means you have to sand every size to get good results. Although, if appearance is not so important to you, then you can do with one of the recommended sizes.
Sandpaper for plastic, stone, ceramics, and glass
By type of abrasive and its application recommendations are the same: stronger, tighter. But sanding is recommended with the supply of water, so a water-resistant modification of the sandpaper is required.
Sandpaper for plastic: choice of grit size
For finishing finishing of plastic and glass, sanding sandpaper even with the smallest grit. the same null or P800. will be too rough. It will leave visible scratches. These materials are smoothed with GOI paste and even finer abrasives. But that’s another story and its own technology.
Belt Grinding Machine. Is a driven device designed for grinding and finishing flat surfaces, removing a layer of rust or paint, and removing sharp edges and burrs from steel and any non-metallic parts.
The Belt Grinder for the Drillpro Angle Grinder
A short review of the adapter attachment for the angle grinder (“angle grinder“), to convert it to a belt sharpening Grinder. I wondered how well it worked and if you could use it.
Grinder. grinding machine (belt grinder). The “endless” belts used. The wider and longer the belt, the better the performance of the machine. Use for machining parts, sharpening and deburring knives.
Features:Brand:Drillpro Type:Belt Sander Grinder Name:Belt Sander Attachment Use in Angle Grinder Material:Aluminum Cast Iron Casting Conneting:Spindle M10 Fit for:M10 Spindle Angle Grinder Belt size:540x30mm Belt Grit:80 / 120 / 150 / 180 / 240 Use to:Polishing Wood, Metal, Stainless Steel and etc.
Item dimensions for reference
Comes packed in a plain bag, no box Set: 1 x Belt Sander Attachment 1 x M10 Adapter 5 x Sanding Belts 540x30mm
Building a Power File! Angle Grinder Belt Sanding Attachment | DIY Grinder Hack
It looks like a usual cheap Chinese Grinder. There were already reviews of similar model with RS550 motor (from electric screwdriver). And the spring is powerful. Adjustment of tensioner tilt (shifts the belt) Workpiece table. There is a tilt with locking Mount for angle grinder (neck 43 mm) There are 2 nuances. First, this Grinder on a small angle grinder.
Second, for M10 spindle. This is a Chinese angle grinder. Here is the aluminum drive roller in the kit. It will not fit on the angle grinder with M14. Install the angle grinder and the roller on the Grinder I have already said that the kit contains 540x30mm (5 pcs) Pull the belt. For comparison, the wide belt from Leroy Merlin. A wide belt is just enough to unroll (in width enough for 2 with reserve) At home you do not want to dust, but outside. no problem. That’s what a cordless angle grinder is for Turn it on, check it. Very desirable the presence of adjustment of speed on the angle grinder I take off and try with one hand, a little uncomfortable)))) You can set the table, you can handheld. Observe safety precautions! Grinder sharpens. With some skill it is possible to observe the required sharpening angle.
What can I say. Works. Belt performance is decent, you can sharpen knives and work on parts. To bring together the knives is unlikely to work, because not enough band and grinder power. Angle grinder is needed with adjustable speed (or as I have, for 2 modes of rotation). The tapes are available in Leroy-Merlin, not very expensive. This is a plus. Minus: the bearing on the angle grinder will die quickly, since the belt tension and lateral load on the shaft of the angle grinder is high.
As an option. put the old little angle grinder and forget. It is possible to resharpen under M14 (it will be necessary to make the drive roller under the belt 30mm “barrel”).
I consider the option to replace the angle grinder on the motor, for example, from a washing machine. Then you can regulate the speed and have no questions about the bearing. Yes, and the power will be higher
In any case, it’s an interesting option to see if you need a Grinder or not. Professional grinders are much more expensive.
The goods are given for writing a review store. This review is published in accordance with the clause “Technical data” of the German Federal Banking Law (StGB).18 Site Rules.
How to choose a Grinder for your home
You have to choose the grinder model by taking into account the type of material you want to process. For example, convex or flat surfaces should be “finished” with bandsaws specially designed for this purpose. There are also a few other features to consider.
Modern factory models are made with power from 500 to 1500 watts. Models of devices with a maximum performance of 1200 to 1500 watts will not be superfluous, if you regularly have to process different kinds of workpieces. This equipment is ideal for auto mechanics, electricians, assemblers, joiners.
There is no need to choose strong machines for amateur use. 800 W will be enough to grind various parts from time to time. Such grinders are usually installed in personal garages and workshops.
Belt speed is an important factor to consider when choosing a machine. It is customary to divide the devices into three groups.
- 200-360 m/min. This speed will be enough to handle some small fragments. These devices will help to perform high-quality grinding of wood, metal and plastic, as well as to remove paint layers on the surfaces of pipes, metal profile. This speed is enough to prepare the parts for work that requires high accuracy.
- 360-500m/min. High-performance units, which are purchased more often for small workshops. Special narrow sanding belts are usually available for these grinders. Others are not suitable. Process any type of surface.
- 500-1000 m/min. They are special purpose machines. Designed for hard-to-reach areas on parts. Traditionally equipped with narrow belts.
Please note! Some grinders allow adjustment of pulley width and shaft speed. This will allow the devices to perform a variety of work.
This factor must be taken into account if you intend to work on vertical parts and need to hold the device in your hands all the time. For horizontal grinding, the mass can be disregarded.
Generally, the weight of the machine varies between 2.5 and 7 kilograms. The heavier ones have more power.
Grinding belt size
Grinding belt size is normally linked to power and speed. The wider the belt, the slower it should move on the pulleys. Accordingly, the power of the device for wide belts must be higher.
The grinders are usually made in widths of 75-76 mm, 100 mm, 115 mm. Lengths can be 457 or 533 mm. It turns out that if the belt is longer, it will last longer.
Additional features, which can be performed by the belt Grinder
The Grinder can have useful additions to its functionality, including
- frames designed to determine the exact limits of material removal;
- fasteners, which will make more reliable fixation of the installation to perform complex treatments;
- soft start, which allows a gradual increase in speed, preventing jerks and, consequently, belt ruptures
- elementary replacement of equipment, which does not require the unscrewing of complex mechanisms with wrenches;
- automatic centering. This option is useful in case of alternate processing of different types of material. It allows you to adjust the movement of the shaft and belt;
- RPM maintenance system that helps when giving out a heavy load on the device.
Most models are available with several additional knobs. These make it easier to operate the machine when grinding complex workpieces.
Important! It takes only a few seconds to change a belt on the grinder rollers. To do this, you must first release the driven roller to release the tension. This loosens the belt and you can remove it without any effort. When a new belt is put on the driving mechanism of the machine, it is first placed on the drive roller. The consumable is sold glued, so changing it is no problem.
Belt Grinder: the main advantages and disadvantages
Any equipment used in home or professional workshops has its pros and cons. Such machines are also no exception to the rules. The first and perhaps the most significant advantage of the grinder is its versatility. Some models can be used for a large number of tasks, such as the Grinder from Chapay.
Another advantage of such equipment is a consequence of its design. It is about the fact that during grinding, the working area does not overheat. Temperature increase. a disadvantage inherent in most grinding units. Moderate heating is achieved due to the size of the working element (pulley). The size of the wheel is designed to keep it cool when moving outside the working area.
All surfaces of such a desktop machine are ground, which is also considered a serious advantage. This characteristic makes its operation as simple and convenient as possible. Belt grinders have a smooth stroke, which allows you to process metal parts and products made of other materials evenly.
The main advantage of the belt grinder is its versatility
Industrially manufactured equipment is characterized by the high accuracy of the rollers. Due to this reduces the possibility of skewing the abrasive belt in the process of movement of the pulley around its axis.
The downside of any factory grinder, of course, is its cost, which is far from democratic. However, today there is an opportunity to purchase a prefabricated kit, which includes all the necessary parts (except the engine). One of the most popular kits is the Band Grinder “Mastak”, the price of which is only 7 thousand.
And finally, it is worth noting a special design of the clamping pad. Desktop machines of this type are designed for machining parts that vary not only in material, but also in shape.
Guarantee 36 months.
300 W, Diameter of wheel: 150 mm, Thickness of wheel: 20 mm, Seating diameter: 32 mm, with grinding wheel. Tape
Warranty 12 months.
200 W, Diameter of a circle: 150 mm, Thickness of a circle: 20 mm, Seat diameter: 32 mm, with grinding tools. tapes
Guarantee 12 months.
250 W, Diameter of a circle: 150 mm, Thickness of a circle: 20 mm, Seat diameter: 32 mm, with grinding tools. tape
60 months warranty.
450 W, Diameter of wheel: 150 mm, Thickness of wheel: 20 mm, Seating diameter: 12.7 mm, with grinding. ribbon
Warranty 12 months.
250W, Diameter: 150mm, Thickness of wheel: 20mm, Seating diameter: 12.7 mm, with grinding. tapes
Warranty: 36 months.
370 W, Diameter of wheel: 150 mm, Thickness of wheel: 20 mm, Seating diameter: 12.7 mm, with grinding. sash
Guarantee 24 months.