When puttying the surface, you can not do without polishing it. This can be done both manually and with the use of mechanization. Manual grinding is quite effective, especially when processing hard-to-reach areas, but it takes a lot of time and effort. To facilitate the work will help the use of a grinder for putty.
- Varieties of grinding machines
- Tape models
- Vibration models
- Eccentric models
- Additional devices
- Description of the Makita BO3711 grinder
Varieties of grinding machines
The classification of grinders provides for their separation according to the principle of power supply into electric and pneumatic.
Pneumatic modifications do not have engines. They are not needed, since the mechanism operates under the action of compressed air directed from the compressor unit. Due to the lack of a heavy engine, pneumatic devices are lightweight and affordable prices. Another positive quality of pneumatics also comes from its low weight: when working with such equipment hands are not tired, which means an increase in labor productivity.
The main disadvantage of pneumatic grinders lies in the need for a volume compressor. It is precisely because of the need for a compressor that pneumatic equipment is most often located in auto repair shops. In such places, the compressor can be used for dual purposes. But the acquisition of such an apparatus for repair purposes is justified only with very large volumes of work.
Electric models are characterized by high mobility. Such a grinder can work wherever there is an electric network. The disadvantages of electrical devices include their rather significant weight, large dimensions, as well as considerable cost.
Advice! If the grinder is purchased for work in a private house or apartment, rather than large objects, it is more reasonable to opt for an electric grinder.
According to the method of surface treatment, grinders are divided into three groups:
- tape
- vibrating;
- eccentric.
Below we consider the features of each of the listed types of equipment.
to contents ↑Tape models
This type of equipment is used for grinding large areas. Belt machines incorporate an abrasive belt that is mounted on rollers. As a result of the rotation of these rollers, the tape moves in the same direction. Belt mechanisms are the most productive among all grinding devices. However, too high a power of the equipment does not allow using it for finishing grinding.
When buying a belt-type sander, it is recommended to pay attention to the following characteristics:
- Automatic centering of the tape. Special rollers maintain the position of the tape exactly along the axis of movement. Thanks to this, slipping of the tape is avoided.This function provides more comfortable operation of the device.
- Branch pipe for connecting a vacuum cleaner. Such a pipe is available on almost all modifications of grinding machines. This fact underlines the importance of the device, which protects the room from the spread of dust on it, liberated liberally during grinding.
- Additional rollers, thanks to which it is possible to process the dead zones that occur when grinding areas near the walls.
Vibration models
This type of equipment can be considered the most common among grinding machines. Perhaps the best known among devices of this type is a surface grinder. The device is equipped with a sole in the form of a rectangle on which sandpaper of the corresponding grain size is attached with special clips. Grain sizes are selected depending on the tasks. For example, sanding the walls using sandpaper under the numbers from 100 to 120, for cleaning metal surfaces - from 40 to 80, and for wood processing - from 180 to 240.
Another subspecies of vibration models is a delta grinder. The principle of its functioning is the same as that of a surface grinding device: one of its soles is made in the shape of a triangle. A delta grinder is used for processing hard-to-reach areas (for example, for grinding corners).
Vibratory grinders without a rotating plate are designed for grinding flat coatings. This technique is used to process the ceiling, walls, as well as all kinds of wood products.
When choosing a grinder with a flat plate, it is recommended to pay attention to the following nuances:
- As mentioned above, there are two types of plates - rectangular and triangular. Although a rectangular shape is used much more often, there is often a need for triangular plates. Therefore, some manufacturers provide for the installation of another type of plate if necessary.
- You should look at the method of fixing sandpaper. In low-cost models, the mechanism is often not very convenient, which is why the abrasive is constantly disconnected. In a quality device, sandpaper should be firmly fixed.
- Compared to eccentric models, vibratory sanders are less productive. They are well suited for finishing, but are not effective enough on uneven, curved surfaces.
Eccentric models
The alternative name for eccentric sander is orbital. This name of the device received in connection with the features of the movement of the rounded working sole. This element at the same time rotates around its axis and moves in an orbit of a small radius. Sandpaper in this device is fixed on Velcro. The main purpose of eccentric modifications is the finishing of the putty walls and their polishing.
Grinding machines are also available, the task of which is to process surfaces in large areas. Such devices feature an ergonomic telescopic handle and gear. Optionally, large-sized grinding wheels (the diameter of such wheels is 215 or 225 millimeters) can be installed on grinders of this class.
Another purpose of eccentric grinders for walls and ceilings is the removal of old coatings. It is also possible grinding of stone and concrete. The use of eccentric models significantly reduces the labor costs for grinding work.
to contents ↑Note! The performance of eccentric models is great, as is the cost. Therefore, the purchase of such equipment for grinding a small area does not make sense. It is recommended to rent the device at a rental point for construction equipment.
Additional devices
Grinders are equipped with special dust collectors, where finely dispersed dust exfoliates from the putty. It should be noted that the dust collector will only function if there are special dust holes in the abrasive. It is also worth taking a closer look at the material of which the filter is made. If it is paper, then it cannot be washed, and therefore this part will often have to be changed. A plastic filter does not cause any trouble: it can be washed and put back into place.
to contents ↑Description of the Makita BO3711 grinder
This unit is designed for finishing grinding wood. Makita BO3711 grinder is a high-performance industrial equipment. However, this equipment can also be used in a small room.
The sizes of abrasive paper for the device are 228x93 millimeters. The paper is fastened in special clips. The frequency of fluctuations is from 8 to 22 thousand per minute. At the same time, in idle mode, the number of oscillations is between 4 and 11 thousand per minute. The platform travel is 2 millimeters. To operate the Makita BO3711, a 190 W electrical network is required.
The grinder is equipped with a powerful dust removal system. Dust is removed using a sanding pad. If you have to grind a large area, you can install a special bag to collect dust.
The weight of the equipment is 1.6 kilograms. The design is characterized by an ergonomic design, the presence of a soft handle framed by rubber.
The choice of the type of grinding device and the specific model is recommended taking into account the nature and scope of the upcoming work. You should also consider the type of surface to be treated, and possibly your own individual preferences.
