Features grinders

By Admin | Tools
21 April 2016
finishing of wood, metal or stone - a laborious process, even if it is a relatively small objects.Of course, a small wooden piece can be treated with a manual plane or grind a file, and then smoothed with sandpaper ... But if the surface area is calculated in square meters (say, a concrete wall should be sanded before painting or parquet flooring prior to clearing), and if the material is less malleable thanwood, can not do without grinding and polishing machines.

What are they

Sanding machine - a power tool for roughing, and finishing the main surfaces.Their work is common: they remove the upper layers of the treated material by abrasive ("ripped off") of the working body.Abrasive material is much stronger abrasion than the treated surface - due to this, and achieved the desired effect.

Grinder Grinder

on purpose, design and type of work grinding device can be divided into several groups.

By appointment emit cutting machine (grinder), stripping (sander) and finishes (polisher).The well-known "Bul
garian" - this is exactly the Cut grinder, which is used for cutting metal pipes, fittings and stone when you need to get a smooth and clean cut surface.

The design of grinding and polishing machines are angled (when the axis of rotation of the engine and the working member arranged at a right angle) and end (the axis of rotation of the engine and the working body of the same).

working bodies sanders - is grinding wheels (cutting and polishing), abrasive stones (cylindrical, pyramidal or conical shape), abrasive belts (for machines continuous) and the abrasive plate (for vibration devices).

By type grinding mechanisms are divided into rotation (surface processes revolving around a fixed axis grinding wheel), cam (oscillate-circular motion around the axis of the displaced - approximately as a circular motion rub the window glass), vibration (soft rectangular base vibrateshigh frequency, like "shivers shiver") and continuous (actuator moves continuously and forth, as a rotating drum or a caterpillar tractor).Vibrating grinders and continuous-ki is used mainly for the treatment of wood;the most famous of them - sanding machines for parquet.


grinders usually have an electric or pneumatic actuator.Machines with electric convenient in that they can work anywhere there is a socket.Disadvantages -large weight (due to massive motor housing), and the restriction on the power (the power of the electric motor can not be increased without a significant increase in its mass).Machines with pneumatic much easier and more powerful, but for their work need a compressor unit, the compressed air supply.

Operation and safety
Grinder Grinder

For work with grinding and polishing machine requires certain skills as inept handling of rapidly rotating abrasive wheels, stones and ribbons can lead to injury.Cutting machines in the processing of metal give a shower of sparks, so they can not be used in areas where there are combustible materials, cans of gasoline or gas cylinders.All kinds of grinding and polishing devices left a large amount of fine dust;if the wood dust is still possible to come to terms, the metal and stone are dangerous to health.We must work in overalls, thick gloves, goggles or protective shield and respirator.When working with massive stone blocks (cutting, grinding) propyl and the work surface must be periodically watered with water to reduce dust generation and prevent the overheating of the working body.Remember, grinding wheels and abrasive stones -products not monolithic, overload and overheating may collapse on the go.

selection and prices

Sanding machines produced in many countries, and their choice is big enough.Unfortunately, the Russian market of power tools in recent years can not boast of a rich assortment of products, although the quality of domestic machines (for example, releases Konakovo power tool plant in the Tver region) is quite acceptable, and the prices are the merciful.

When buying, remember that widely represented Chinese and Polish products are not very reliable.Preferably polishers Western European (German, Swedish), Japan (Hitachi) and American (Milwakee) production.