Rating of the best delta grinders for 2022

Delta grinders (DShM) are one of the varieties of a simple grinder. They usually consist of a platform on which a production tool (sanding sheet) and other equipment is attached, as well as a body made of plastic with a special dust collector. An engine with a movable element - a rotor (anchor) is installed under the body itself. Due to the rotation of the anchor, the platform comes into motion. The DShM produces translational-return movements with a vibration frequency of 2-3 mm, and it is due to them that the surface to be treated is polished.

The tool can weigh between 0.8 and 1.8 kg. The equipment is quite light in itself and very maneuverable, it is easy to operate. It actually lacks any handle, there is only an upper ledge, for which the tool is actually held by the user. The operator puts his hand on this ledge and drives the machine along the surface - this process is very similar to controlling a trackball or a computer mouse.The pressure on the surface can be increased, thereby adjusting the vibration of the working platform due to the action of the counterweight to the crankshaft. Such an operation will reduce the return on the operator's working hand, and he will be less tired.

The difference between DShM and other grinders

It lies in the shape of the working surface, which is made in the form of a triangle (i.e., the Greek letter "delta") and is more reminiscent of an ordinary household iron. The sharp nose of the tool allows you to grind recesses, deep notch edges or sharp corners.

Sandpaper, angle grinder and multitool - is it a worthy replacement for DShM?

Each construction tool has its own tasks and scope.So, you can sand the surface with sandpaper, however, this will require a lot of muscular effort, and this method is suitable only for small surfaces. But ideally “sanding” 20 boards in a row with sandpaper will not work - a person will simply get tired.

In turn, the angle grinder will not be able to penetrate into hard-to-reach places, since its working platform has the shape of a circle, and it will rest against the walls of the part.

But the multitool (from the English "multitool" - a multifunctional tool) can handle almost (!) With any job, because it can be equipped with grinding nozzles and sawing discs, and it does not take much places. To play the role of a delta grinder, a special triangular platform with dimensions of 0.93 x 0.93 x 0.93 cm is installed on the multitool. However, if you need to process a large number of elements (for example, corners in a bath array), then it would be better to use a specialized LSM.

The purpose of the delta grinder

Its main uses are:

• Penetration and processing of narrow spaces, for example, turning the edges of rounded holes;
• Removing traces of paintwork materials from the joints of the beams, when it is impossible to get to the right place even with sandpaper;
• Elimination of finishing flaws, such as: removal of dirt, glue residue, traces of paint from the inside of the joints;
• Performing final grinding work in order to eliminate notches, creases, and other extraneous marks;
• Removing dried paint from boards, concrete walls, lining, when such an operation is required before a new painting;
• Careful grinding of wall irregularities after applying putty in order to prevent the creation of cracks;
• Removal of moldy growths and fungus that form in the corners or joints of wooden beams.

Best of all, delta grinders interact with wooden surfaces. The process of their processing runs smoothly and evenly, therefore, with sufficient skill, it is simply impossible to leave any cuts or traces of rough grinding. But trying to grind just a large area of ​​a flat surface with such a machine is not the best idea, because the DShM has its own specific purpose, and for such work it is better to use a conventional grinder.

In addition, the DShM tool is also capable of processing hard surfaces, for example, stone or concrete - it will be great to clean off frozen smudges or drops from them. Processing of metal objects is also possible, for example, when it is required to remove metal rust in a hard-to-reach place. This tool shows itself especially well during the renewal of artistic forging designs, where, at times, it is impossible to get close to individual figured monograms with either emery or a grinder.

Household and professional DShM

Delta grinding tools can vary in terms of the degree of possible loads and areas of application. As a rule, professional DShM are capable of:

• To withstand high intensity of work;
• Work for an extended period of time;
• Do not need breaks between operating periods (for example, a household appliance usually needs a “rest” every 20 minutes of operation).

Among other things, professional machines are usually distinguished by:

• A complete set of various nozzles and implements, which comes immediately as part of the basic configuration;
• Excellent level of manufacturing of mechanical and electronic parts used in the design;
• Increased power;
• Increased productivity;
• High price;
• Increased requirements for maintenance and repair (such DShM is hardly possible to repair at home).

A significant disadvantage of a professional tool is also its heavy weight. And for household DShM, the main drawback can be called an extremely short operating time - home models are designed only for use a couple of times a week, and even then for several hours.

The choice of machines for various types of work

Depending on the construction task at hand, it is necessary to select a DShM with the appropriate characteristics:

• Occasional homework (episodic) - for such tasks, a household model with a power of 80 to 125 W is suitable, which is quite enough to clean an old stool from drops of new paint or several corners of a bath from fungus or mold;
• Permanent work - it is better for a professional carpenter who works almost daily to choose a machine with a power of 200 to 300 W;
• Performing delicate grinding - here it will be necessary to build on the frequency of vibrations produced by the tool. For example, small burrs from the lining are perfectly removed by a machine with an indicator of 8000-10000 vibrations per minute.
• Performing rough grinding - here you will already need a professional tool with an increased number of vibrations. Hard materials (stone, concrete, metal) are usually subjected to rough processing. Experts recommend for such work at least 14,000 - 24,000 vibrations per minute.
• Processing small surfaces - in this case it is better to use a multitool with nozzles or a delta grinder with a reduced working surface (0.93 x 0.93 x 0.93 cm.).
• Machining large surfaces - this is often required by metal sheets and wide boards. The maximum possible working sole of the DShM has dimensions of 235 x 112 x 145 mm.

Selection and installation of additional equipment

On the DShM, a special triangular-shaped grinding sheet is installed as a working surface. It should be the same size as the tool's working platform and preferably from the same manufacturer. If these requirements are met, then there is no risk that the holes on the sheet and platform will not match. Namely, through these holes, wood dust is removed during the operation of the device. Depending on the construction task, sanding sheets are selected according to the grit size - fine sanding is suitable for fine sanding, coarse sanding is needed for coarse sanding.

The main problem can be the search for a sheet that will be “native” for a certain LSM. But construction experts offer the following way out of this situation: if a triangular sheet cannot be found in any way, then it is quite possible to buy a round one (of the same brand), but with such a size that it fits into all the corners of the triangular sole. Next, it remains only to trim the protruding edges. And you can make holes for the dust collector yourself (even two or three holes will be enough).

Proper operation of the DShM

Long service life of the tool will be facilitated by constant care and maintenance of the equipment clean. After using the machine, it is necessary to clean the holes for dust suction, wipe the working platform itself, remove clogged wood dust from hard-to-reach places in the body.It is recommended to change the working elements of the DShM every five years.

Rating of the best delta grinders for 2022

Mains powered equipment

5th place: Interskol PShM-32/130

Due to the increased size of the sole, the operator is able to quickly pass areas of significant size. The model has a power button, which can be blocked for the period of work. Compared to competitors, this sample is presented on the market at a very attractive price. According to Yandex.Market, this delta grinder has the most reviews.

Specifications:

Name	Index
Power, W	130
Fluctuations, number / min	11000
Weight, kg	0.95
Length and width of the sole, mm	140 x 80
Manufacturer	Russia
Warranty, years	2
Price, rubles	2000

• Power button lock;
• Light weight;
• Large dust bag.

• Extremely short cable (only 2 m).

4th place: BOSCH PSM Primo

One of the most controversial, but at the same time popular models on the Russian market. With its low power of 50 W, the device produces 24,000 vibrations per minute. Due to its extremely low weight, the hand does not get tired when working with this DShM. The ergonomic control surface is equipped with a rubberized pad that does not allow the tool to slip in your hand. There is a button for fixing the working stroke.

Specifications:

Name	Index
Power, W	50
Fluctuations, number / min	24000
Weight, kg	0.6
Manufacturer	Germany
Warranty, years	2
Price, rubles	3400

• Protection of an electric wire from refraction;
• Large dust collector;
• High oscillation frequency.

• The kit comes with only one sanding sheet.

3rd place: RYOBI RMS180-SA30

This grinder specializes in the processing of hard-to-reach places, which implies an elongated design of its body. The model is positioned on the market as a semi-professional, the frequency of vibrations issued can be reduced when delicate grinding is required. The tool (grinding sheet) is fixed on the sole not only with Velcro, but also with clamps.

Specifications:

Name	Index
Power, W	180
Fluctuations, number / min	12000
Weight, kg	1.88
Working surface, mm	26x57 and 185x92
Manufacturer	Japan
Warranty, years	2
Price, rubles	4500

• Has an extremely thin nose (almost any place is available);
• 30 abrasive sanding sheets included;
• Oscillation frequency adjustment.

• Very rigid cable for mains power supply.

2nd place: Metabo FMS 200

Very powerful and reliable machine, great for daily use and large-scale applications. This model works great with both wood and hard materials. Due to the increased power, it can be used for cleaning art forging objects from corrosion. The power button, although not fixed, is moved to the end, which avoids accidental pressing and inadvertent shutdown.

Specifications:

Name	Index
Power, W	200
Fluctuations, number / min	26000
Weight, kg	1.2
Working surface, mm	147x100
Manufacturer	Germany
Warranty, years	1.8
Price, rubles	4900

• Relatively light weight;
• Efficient built-in vacuum cleaner;
• Large work tape.

• The working platform cannot turn.

1st place: Metabo SRE 3185

Another completely professional tool. Due to the unusual shape of its sole, it is able to process both surfaces of regular areas and undermine corners in hard-to-reach places. Its sole is removable and can be replaced by any shape: round, triangular, square. In fact, this sample can be classified as a “multi-tool”, but all the available nozzles are not supplied in the basic configuration, and it is quite difficult to find them.

Specifications:

Name	Index
Power, W	210
Fluctuations, number / min	20400
Weight, kg	1.5
Working surface, mm	Depending on the sole used
Manufacturer	Germany
Warranty, years	2
Price, rubles	8900

• Advanced functionality;
• Light weight;
• Good suction capacity of the internal vacuum cleaner.

• Difficulty finding replacement soles.

Battery operated equipment

5th place: Einhell TE-OS 18/1 Li - Solo 4460713

An excellent and compact tool designed for high-quality processing of various surfaces. Ideal for sanding hard to reach corners. The system of special fastenings "Extreme Fix" allows you to change the equipment in the shortest possible time. The model has a dust extraction system.

Specifications:

Name	Index
Battery voltage, V	18
Weight, kg	0.7
Battery type	Li-Ion
Working surface, mm	150x150x100
Rotation frequency, number / min	24000
Manufacturer	China
Price, rubles	1700

• Versatility;
• Active dust collector;
• Installed aluminum fan wings for smooth running.

• The basic package does not include either a battery or a charger.

4th place: Ryobi R18PS-0 5133002443

Standard DShM for home use. Especially not designed for heavy loads. Due to its low weight, it is also suitable for processing large surfaces and for leveling corners and slopes. In a short time, it can clean dirt and rust from hard materials.

Specifications:

Name	Index
Battery voltage, V	18
Weight, kg	1.1
Battery type	Li-Ion
Working surface, mm	140x100
Rotation frequency, number / min	22000
Manufacturer	Japan
Price, rubles	2100

• 6 sanding sheets as standard;
• The equipment is installed on the working platform with Velcro;
• There is an adjustment of the oscillation frequency.

• Does not come with batteries or charger.

3rd place: Black&Decker BDCDS12N-XJ

The compact and reliable tool is intended more for the production of one-time general construction work. The design of the model is made in a special lightweight form, which makes the control of the tool extremely simple. To carry out the dust collection process, any household vacuum cleaner can be connected to the device. The body is made of durable materials.

Specifications:

Name	Index
Battery voltage, V	12
Weight, kg	0.6
Battery type	Li-Ion
Working surface, mm	130x110
Rotation frequency, number / min	11000
Manufacturer	Germany
Price, rubles	3100

• Advanced dust collector;
• Protection of the power button from inadvertent interruption of work;
• Quality build.

• Low battery capacity (1 hour operation).

2nd place: Bosch EasySander 12 060397690B

This sample can be attributed to the range of multi-tools. Ideal for hard to reach places and small surfaces. The device uses Bosch Sineon Chip technology, thanks to which the battery charge level is consumed by 20% less. The sole consists of two elements - they can be used separately from each other and separately attach sanding sheets to them, as well as rotate. It is possible to connect a household vacuum cleaner.

Specifications:

Name	Index
Battery voltage, V	12
Weight, kg	0.7
Battery type	Li-Ion
Working surface, mm	300x125
Rotation frequency, number / min	22000
Manufacturer	Germany
Price, rubles	5600

• Advanced functionality;
• Compactness;
• Increased battery capacity.

• Relatively high price.

1st place: Ryobi R12PS-L13S

This DShM is designed to carry out final work on surface treatment and prepare them for painting. The model has a special retractable strip for working in the most inaccessible places. In addition, the DShM is equipped with its own DastTech dust removal system, and the special coating of the GripZon body ensures its wear resistance. The machine has excellent handling.

Specifications:

Name	Index
Battery voltage, V	12
Weight, kg	0.7
Battery type	Li-Ion
Working surface, mm	124x20
Rotation frequency, number / min	22000
Manufacturer	Germany
Price, rubles	7100

• A rare case when the battery is included in the basic package;
• The kit also includes 6 sanding sheets;
• The device is provided with a convenient case for transportation.

• Relatively small working surface.

Instead of an epilogue

Having studied the Russian market of delta-shaped grinders, it can be unequivocally stated that Russian retail outlets behave extremely dishonestly in this segment. This is especially true for the completeness of the supplied models - stores in the Russian Federation simply disassemble the equipment and sell related spare parts (batteries, sanding sheets, chargers, removable soles) separately. This conclusion is confirmed by visiting the official websites of well-known foreign manufacturers, where all such elements are immediately included in the basic configuration. Thus, it is better to purchase DShM directly from the manufacturer, even if it will cost a little more.