Orbital and eccentric grinders in what is the difference
What is the difference between the orbital grinder from the eccentric
To make a choice, you need to clearly understand the purpose of each type of grinder. At first glance, the principle of the grinders is the same. grinding the surface of the material with abrasive tooling. In each specific task one type of grinder will show itself brilliantly, and the other will not give the expected result. For example, the processing of inner corners is inaccessible to eccentric machines, and the vibrating grinders can do it. Let’s analyze the types of grinders and determine the scope of each of them.
- Most modern grinders are equipped with a dust extraction system: connected construction vacuum cleaner through a special nozzle or included a bag for dust collection. This makes the work process cleaner, the tool itself is better controlled, and the consumption of abrasive accessories is reduced.
- According to the type of power grinders are divided into mains and cordless. Advantages and disadvantages of wireless grinders are obvious. mobility and independence from the mains, but the work time is limited by the battery charge.
Rating of eccentric grinders
Each manufacturer produces models with a specific set of characteristics that affect performance, ergonomics, reliability and life of the tool. Vyborexperna website specialists.ru have studied and analyzed data on the features of more than 20 CMMs, conducted tests on the quality of assembling and usability. In compiling the review, the following parameters of the devices were taken into account:
- Power of the engine;
- Diameter and speed of the disk;
- The size of the stroke of the platform;
- Features of fixing the sheet;
- The level of vibration and noise;
- Additional features;
- Set composition;
The rating includes 10 models, which are divided into 2 categories according to the principle of design features. The nominees that didn’t make it into the review were inferior in terms of comfort of use, price/performance ratio. In a number of tools, a low degree of dust extraction, lack of an anti-vibration system and rubberized inserts on the handle, which had a negative impact on usability. Doubtful reliability of components and parts also did not allow selecting them in the top of the best units.
Which Grinder is Better Eccentric or Orbital
The eccentric grinder. for clean sanding of any surfaces
(orbital) is one of the universal “garage” tools, allowing the home craftsman to facilitate the performance of sanding virtually all surfaces not materials.
What are the models of eccentric grinder?
Pneumatic orbital sander has a fairly common device. On a round support plate, referred to as the sole plate, is fixed a removable sanding sheet, which does not make the means of making a smooth surface of any material. Different models differ in the method of fixing the sanding sheet, not counting the material of its production. With grinders are used sheets made of the following materials:
According to the method of attachment, tools are divided into two groups: with clip or with Velcro. Tools with clamping cheaper to use, as well as the grinders themselves, consumables do not have the lowest price. The main main advantage of playing slots models with Velcro is the ease of changing the sanding sheet. The design of the grinder a may include a dust extraction as it is also called a device that allows you to connect an external vacuum cleaner.
Orbital grinder is comfortable for narrow finishing sanding. The quality of grinding is provided due to the fact that the sole plate simultaneously performs reciprocating and rotational motion. This distinguishes orbital models from other grinding tools. For example, a vibratory sander performs only rotational movements, thereby creating the necessary vibration.
What parameters to look for when selecting a grinder?
The most important technical parameter for any tool is its power. Orbital
the eccentric sander can have a power of 150 to 1000 watts. Depending on the model, this machine can be used for domestic or professional purposes. Tools with a power of about 400 watts are ideal for sanding various parts.
Unlike similar tools, the pneumatic orbital sander has a circular base plate. Butt diameter may vary significantly from model to model. Machines with a 125 mm wheel diameter are regarded as universal. “Rpm” of the tool is the most important indicator of its productivity. It is most convenient to work with models that have a soft start function, allowing you to gain speed without jerks. Models with speed control for perfect grinding results.
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Pneumatic eccentric grinder can be equipped with additional functions:
Electronic control and auxiliary functions allow the operator to choose the best machine mode depending on the characteristics of the material to be processed.
For example, you can work on painted surfaces at low speeds and on hard materials at high speeds. With the right type of grinder, the grinder can also be used for polishing surfaces. As a result, the purchase of such a model allows you to refuse to buy additional tools, such as a polishing grinder. Hard grinding discs are used on flat surfaces, soft. on curvilinear.
How to choose a grinder. Types of grinders by principle of operation.
This video tells in detail about what grinders
There are, the principle of operation of each type is considered
Lesson 4 ” Orbital and eccentric grinders in what is the difference. Overview of the risks ” ( painting )
Greetings, you! To begin with, I recommend good online stores. Goods and services at an affordable price: The field
How to choose the right grinder?
What is needed in order for the eccentric machine to meet all the requirements of the home craftsman and was able to solve the tasks? The answer is one. choose the right tool, taking into account important parameters. Experts recommend paying attention to the following criteria:
- rotational speed;
- the presence of a smooth adjustment of rotation;
- frequency of oscillation of the grinding plate;
- the diameter of the plate;
- possibility or impossibility to change the stroke of the eccentric;
- availability of dust outlet;
Let’s consider the important parameters of choice in more detail. Power of the machine directly affects the quality of grinding, but more powerful models weigh significantly and are less convenient to work. Adjustment of rotation and frequency of vibration makes it possible to choose the optimum grinding mode. The speed range can vary from 2 000-13 000 rpm, but, as a rule, for home needs, it is enough models with an indicator of 5 000-6 000 rpm. Do not be guided by the maximum rpm when choosing, as in most cases they are not required.
important from a practical point of view is the presence of functions to stabilize rotations, soft start, etc.п. These extra features offer a significant increase in sanding quality. It is desirable that the machine has a function to change the size of the stroke of the eccentric. The medium-sized models have a stroke of 2 mm to 6 mm. Smaller stroke values result in higher workmanship. Rough grinding requires a greater eccentric stroke.
It should be noted at the outset that models with the eccentric stroke adjustment function are in the expensive price segment, so it is not always advisable to buy them for domestic purposes.
The diameter of the pallet is another important parameter. On average, this value is 125-150 mm. There are models with a smaller diameter. The grinding tool size of 125 mm across is considered universal. effective are grinders with a 150-millimeter base plate. Before you choose a particular model, it is worth investigating the market of consumables in the region, as there is a high probability that later it will be difficult to pick up abrasive sheets.
Comparison with other models
It is worth looking at the difference between the vibrating surface grinder and eccentric and belt models. It is considered a more versatile option that allows a variety of surface finishes. The belt sander is distinguished by its convenience in working with objects that possess a uniform texture, suitable for rough finishing. The flat sanding option allows you to achieve results regardless of the initial smoothness of the surface.
The eccentric models have their own special features. They are designed mostly to work on large surfaces and allow you to successfully carry out the final finish. An eccentric sander is suitable for parquet floors. But it is not suitable for other, tougher materials. Whereas a surface grinding machine can successfully grind even sensitive plastic or highly corroded metal surfaces.
Practically vibratory sander PM by their own functionality is somewhere between belt and eccentric models. With them you can successfully perform finishing of different surfaces. Mini versions successfully manage narrow sections of material, difficult and inaccessible places. Variable frequency of rotation makes it very comfortable to work on surfaces with irregular texture.
This is a separate class of vibratory CMMs, because their main difference is the delta-shaped sole. Popularly, deltoid grinder called “iron.
Some manual sanders of this type have a rotating working pad. In these machines, the worked angle of the emery can be changed by simple rotation of the machine’s soleplate.
Due to its diminutive size, the “iron” has good “passability” and is used for the treatment of complex surfaces, such as for auto body repair.
This type of grinder is used for polishing and sanding stone surfaces, such as in the manufacture of fireplaces, window sills, countertops and other products made of this material. Planetary planetary grinding machine consists of an electric drive and a planetary sanding base.
Flexible diamond-coated grinding discs are used as accessories on this machine. The machine is equipped with nozzles for water cooling in the place of treatment and has a nozzle for connection with a vacuum cleaner. The latter is connected to the CMM to remove stone dust during “dry” sanding of the material.
What kind of grinders there are
The sanding machine (PM) is an indispensable tool for all kinds of finishing works: polishing and sanding of metal, wood, concrete, stone and other surfaces. Therefore, it is not difficult to guess that the choice of grinder is made taking into account the types of work that are supposed to perform in each case. Existing types of grinders can level roughness on different materials, eliminate differences in height, to produce rough and finish sanding of surfaces. They differ not only in their design, but also in the principle of operation.
There are more than fifty models of orbiters on the market today. Of the popular brands stand out:
bo. Among such products. small and cheap eccentric machines.
Bosch. Wide range of quality models, mostly medium and high (over 600 watts) power, medium size. The main share of models are equipped with useful options (braking system from idling, adjustment of speed and eccentric stroke). Above average price range.
Makita. Large selection of models that are suitable for both garage and professional workshops. Equipped with a good dust extraction system, have adjustable blade speed and eccentric stroke. Some models have an additional removable handle.
Pneumatic orbital sanders
Modern market equipment for repair and construction works offers a wide range of products, among which a special place is occupied by grinders. This equipment is designed for the treatment of surfaces made of any material.
There are different types and types of these tools, one of which are eccentric grinders. Such products differ from their counterparts by their performance. as the working surface acts as an emery wheel attached to the “velcro”. Such pneumatic grinders are characterized by ease of operation and are suitable for polishing and scraping surfaces of any material, as well as concave and convex.
This type of equipment can differ from each other by two parameters:
- The dimensions of the grinding wheel are 185, 150 and 125 millimeters;
- Grinding course. preparatory stage of works. 11 millimeters, roughing. 7 millimeters, intermediate stage and finishing. 3 millimeters.
When choosing orbital pneumatic grinders, you need to pay attention to such parameters as air flow rate, which should be less than the air consumption of the compressor connected to the equipment, as well as working pressure and number of revolutions. The index of the working pressure of the machine must also be lower than the working pressure of the compressor. The number of revolutions directly affects the performance of the equipment and the frequency of surface treatment. The higher this indicator. the more effective work of the pneumatic grinder.
The design features and operating characteristics of these pneumatic grinders significantly expand the field of application of this equipment. Eccentric pneumatic grinders can be used in the manufacture of various products from any materials. stone, wood, metal and others. They are effective in eliminating any defects of surfaces. laps, scratches, irregularities and more.
In addition, they are also suitable for working with paint coating, allowing you to clean the surface easily, quickly and qualitatively. So, orbital pneumatic grinders can be used in the manufacture or processing of products with any surface and manufacturing material.
You can buy this equipment in our company, which offers a wide range of models of pneumatic grinders with high quality and performance indicators.