12 Best Diamond Blades

Choose the right one diamond blade for an angle grinder, circular saw or wall chaser is not so easy these days - especially if you are encountering all this for the first time. The incredible number of different blades dazzles your eyes, and in order to decide what you need, you need to know exactly what material you plan to cut and under what conditions the work will take place. Understanding these two factors will not only allow you to achieve the desired quality of cut and maximum saw performance, but will also save you time and sometimes even save your health. That is why, when choosing a disc for cutting or grinding, you should abandon obsolete abrasive blades and pay attention, first of all, to diamond discs.

Diamond blade rating

To compile the review, we tested the cutting tool and compared the results obtained on the main technical characteristics with the parameters stated in the manufacturer’s documentation. The availability of consumables on the market, the opinions of professional builders, installers, and car mechanics were taken into account. Reviews of diamond blades from owners of small home workshops were studied.

The following characteristics were taken into account:

Size – determines the depth of cut, the possibility of using a grinder or a wall chaser of a certain model, productivity;
The diameter of the mounting hole - no gaps and a tight fit on the shaft makes work safe and efficient;
Rotation speed – must correspond to the same characteristics of the power tool;
Class – professional and semi-professional models are produced;
Design – equipment is produced with a solid and segmented cutting edge;
Type of cutting – consumables are used for dry and wet cutting.

Not all equipment met the experts' requirements. Rapid clogging of the edge, low service life of the working layer, defects in the geometry of the plane - products with such defects were excluded from our rating.

The best gas cutters

Household diamond wheels

For home purposes, a grinder disc for concrete is also often used, which can be used to cut very hard materials, ranging from ordinary bricks to ceramics and concrete tiles. But they are not very suitable for cutting granite, marble or carving a reinforced concrete base. In addition, tools for household purposes wear out so quickly that they are not used for professional purposes.

Such household diamond blades as “Zubr”, “Sparta”, “Tsentroinstrument” have optimal ratios in the price-quality segment. The external coating on them meets high requirements; with irregular use, they last quite a long time.

It is very important to use diamond wheels in accordance with their intended purpose; they should not be used to cut metal or concrete without proper cooling. To ensure that cutting wheels do not overheat and serve reliably, it is necessary to limit the duration of their switching cycles.

The best diamond blades for concrete

The most popular category of cutting consumables. The diamond-coated blade easily copes with cutting any type of concrete. This circle is used for dismantling work, adjusting door and window openings, and laying communications in the walls of buildings. The equipment is supplied by professional wall chasers, cutters, grinders and furrowers. VyborExperta.ru recommends products from 3 brands, which are distinguished by reliability, workmanship and performance.

Makita B-28092

The equipment of a popular Japanese manufacturer is designed for dry cutting of concrete, brick, and artificial stone. It has a segmented structure that improves the quality of the cut. The diameter of 125 mm allows use in branded diamond saws and classic angle grinders. During intensive work it hardly heats up; short breaks of 2-3 seconds are enough for the tool to be ready for cutting concrete again.

The thickness of 2.1 mm and the absence of vibrations ensures accurate cutting of concrete of any strength grade. The 7 mm diamond layer height ensures long tool life without loss of performance. The 22.23 mm mounting hole has precise geometry and fits tightly on the power tool shaft, without gaps. The consumable is designed to work with high-performance tools at a speed of 12,250 rpm.

Advantages:

Low price;
The design of the segments allows for efficient removal of dust;
Does not rotate on the shaft under load;
Stable cutting quality throughout the service life;
Designed for intensive use.

Flaws:

Not detected.

Engineers from a Japanese company have developed a technology for uniformly distributing artificial diamond grains along the cutting edge. This has a positive effect on cutting speed and service life. We use our own diamonds with sharp edges.

Graff GDD 17 125.10

The diamond blade for the grinder, developed by Belarusian engineers, can be used to equip stone-cutting machines and hand-held concrete cutters. The equipment is manufactured using thermal crimping technology and has a long service life. It has a turbocharged edge with specially shaped channels that effectively remove dust from the working area. This increases the service life and ensures maximum cutting accuracy.

The model is universal, can be used for dry and wet cutting, used on natural and artificial stone, ceramic and paving slabs. The equipment is designed for high speed – 12,250 rpm. Features a smooth ride and professional performance. The material is resistant to high temperatures and dynamic impacts, which ensures personnel safety.

Advantages:

Cutting edge height 10 mm;
Does not crumble the edge of the processed material;
Good balance;
Low price;
Professional spraying quality;
Durability.

Flaws:

The 2.5 mm thickness is not suitable for all applications.

Metabo Promotion 624307000

A segmented disk with a classic shape of outlets, which have a large contact area with air, effectively removes dust and helps cool the tool. Designed to work with concrete, hard sandstone, wet concrete and adobe. Installed on angle grinders, hand-held wall chasers or branded diamond saws. Recommended for power tools with a shaft rotation speed of 12200 rpm.

Used for dry cutting, 10 segments do a good job of dissipating heat. The cutting layer height is 7 mm, the edge uses a mixture of artificial diamonds and a binder pressed under high pressure, which ensures a long service life. The connection of the segments to the steel core is carried out by pressing at high temperatures.

Advantages:

Small thickness;
Uniform distribution of diamonds in the cutting plane;
Rigid design for stable operation;
Low price;
High performance.

Flaws:

Cannot be cooled with water.

Tool functionality

Depending on the purpose, the disc for the grinder for concrete can be solid or segmented. The circle divided into segments allows the tool to cool more intensively during operation. The cutting edge is created from diamond chips of a certain fraction with special binders. It is also important what technology the cutting layer is made of.

Methods of attaching cutting segments to the base and purpose:

Laser welding – cutting wheels are reliable and can be used in cutting marble, reinforced concrete products, granite even without moisture
Soldering with silver solder - such discs are used for cutting a concrete monolith in a wet environment, which is necessary to cool the tool and eliminate the risk of it peeling off from the base
Thermal spraying by type of binding agent or geometric closure - such circles can be used for dry/wet cutting of concrete

Most diamond blades are used on angle grinders that operate at about 12,000 rpm (maximum 13,900 rpm). Only the diamond comes into contact with the surface of the processed monolith - it appears above the surface of the rim and abrades the material into dust during rotation. Thanks to the multi-layer structure, the disc is always ready for use - worn diamonds are replaced with new ones located on a lower layer of the rim.

Excess heat is dissipated through the disk body, but it still gets hot. The efficiency and durability of the wheel depend on the diamond fraction.

Large ones are effective, but wear out quickly; small ones guarantee precise and slow cutting, but last on average 30% longer than the large fraction.

The best diamond blades for stone

It is possible to carefully cut stone without chipping only at high speed. To do this, use solid and segmented circles designed for wet or dry cutting. Natural stone is a difficult material to process, and it is worth taking a responsible approach to choosing equipment for processing it. Our team offers three models created using different technologies. The tool is distinguished by good quality of the working layer, accurate cutting and durability.

Dremel DSM540

Classic solid disc designed for cutting natural stone, clinker, ceramic tiles. Suitable for dry cutting at 20,000 rpm. It has good performance and can accurately cut stone of any hardness. Used with compact specialized saws and branded angle grinders. It has a diameter of 77 mm and a mounting hole for the shaft of 11 mm, which limits the choice of power tools.

Small sizes allow you to perform high-precision operations and make complex cuts in ceramic tiles. The wide cutting edge and even distribution of diamonds guarantee a long service life under intensive use. The circle is distinguished by its high-precision plane geometry and tight fit, earning regular positive feedback from professionals carrying out complex interior projects.

Advantages:

Increased resource;
Thin cut without chips;
Uniform wear of the cutting edge;
Resistance to critical temperatures.

Flaws:

Overcharge.

Practice Do it yourself 036-339

Domestic diamond disc for tiles, which is designed for classic angle grinders. Combines a good safety margin with a high cutting speed. Recommended for wet cutting: coolant provides extended service life at 12,250 rpm and reduces interruptions. The circle can be used for processing artificial and natural ornamental stone.

The small thickness of 1.9 mm helps the master make a neat cut without defects, which is especially important when adjusting the dimensions of expensive ceramics. The low price makes the equipment the best choice for domestic use. According to reviews from home craftsmen who carry out interior decoration themselves, purchasing components helped reduce repair costs.

Advantages:

Tight fit;
Light weight;
The working part is not salted;
Uniform diamond structure in the cutting edge.

Flaws:

Application skills required.

Di-Star 1A1R Decor Slim

Di-Star offers a solid diamond blade that can quickly cut stone, tile and porcelain stoneware. The equipment is designed for installation on an angle grinder. The super-thin diamond layer of the cutting tool has an increased service life, good wear resistance and allows you to make a neat cut.

Equipment for dry cutting at a speed of 12,000 rpm has been developed. Special holes provide effective heat dissipation, increasing the intensity of operations. Artificial diamonds are evenly distributed across the width of the cutting part, which increases the quality of cutting thick porcelain floor tiles.

Advantages:

Edge height 8 mm;
Smooth cut without chips;
Tight fit on the shaft;
The lightweight design reduces the load on the grinder.

Flaws:

High price.

Nozzle for an angle grinder. Types of Diamond Cups

Attachments for grinding concrete using an angle grinder are classified depending on the manufacturing method.

There are types:

with a single-row working surface;
double row;
solid.

Single-row equipment has good performance and low weight. It is used to polish concrete and create a smooth edge. The disadvantage is that the tool is difficult to hold on the surface.

Double-row cups are used to carry out primary processing and eliminate gross defects in the concrete screed. Surfaces are polished using nozzles with continuous coating.

The best diamond blades for metal

Metal cutting is one of the most common operations on a construction site. Manufacturers produce wheels with additional cooling for this work. The cutting edge has a small height, and artificial diamonds are applied using laser welding, soldering or using galvanization technology. The variety of models is due to the need to work with different grades of steel. Our team has tested 8 wheels and offers 3 types of equipment, which are distinguished by the quality of metal processing and good service life.

Hammer 206-232

The complex segment structure of a diamond cutting disc for metal allows one to effectively compensate for thermal expansion. The circle is made of high-quality tool steel and has an ideal geometry that eliminates beating and chipping. The equipment can be used for wet cutting; in the absence of a specialized tool, it is recommended to remove the disk from the cut every 3 minutes for forced cooling. This will provide the necessary level of security.

The cutting crystals are held on the surface by a wear-resistant bond that is resistant to elevated temperatures. The edge height has been increased by 30% compared to analogues, which has helped to increase service life and productivity. The consumable material belongs to the professional series, the service life is calculated taking into account the high intensity of use.

Advantages:

You can work with different grades of steel;
Versatility - works well on ceramic tiles and concrete;
Uniform distribution of crystals;
Minimum number of sparks;
High performance.

Flaws:

High price.

DeWALT DT40252

Professional diamond cutting disc designed for working with rebar, stainless steel, cast iron and non-ferrous metals. According to user reviews, it cuts any metal equally accurately. The design is segmental, with effective heat removal during operation. The cutting crystals are applied using a patented technology, which reduces wear on the cutting edge. The wheel is designed for at least 1000 cuts, which is 30 times more than when using abrasive cutting discs.

Design features ensure stable cutting depth and accuracy, as well as comfort during operation. The equipment makes it easy to operate the tool. During operation, less unpleasant odors and dust are released, increasing safety. You can equip the consumables with a UGM or a cutting saw.

Advantages:

Small thickness – 1.3 mm;
Ten segments;
High strength of steel;
Light weight.

Flaws:

Not detected.

Fubag Slim Fast 80125-3

German engineers have developed a high-performance turbo disc to operate at 15,200 rpm. This is one of the best indicators in its category. The small thickness allows you to make a neat cut of any metal using dry cutting. Design features allow excess heat to be effectively removed, and holes in the sheet steel prevent overheating during intensive work.

Increasing the cutting edge height to 10 mm had a positive effect on the service life. Promotes long service life and uniform distribution of diamonds in the structure. The cutting part does not become clogged with intensive use. The circle has good strength and heat resistance.

Advantages:

The fastest cut;
Universal application;
No vibration during operation;
Very thin cut.

Flaws:

Overcharge.

Cost and most common companies

The cost of the instrument varies widely. It depends on the following indicators:

Brand.
Size.
Functionality.
Processing quality.
Purpose.

By purchasing a professional diamond blade from a reputable brand, you will be sure that the equipment will not overheat throughout the entire shift. The most common brands are:

Intertool.
Matrix.
Distal.
Bosch.

The middle class wheel, which was released by Hilti, allows you to process reinforced concrete and concrete. The products of this company have high strength and wear resistance is quite reliable. The domestic brands Sparta, Tsentroinstrument, and ZUBR are of decent quality.

The Best All-Purpose Diamond Blades

You can buy any specialized equipment for the job, but regularly changing the working tool has a negative impact on labor productivity. If you have to work with concrete, ceramic tiles, or metal at a construction site, then it is better to purchase universal discs. Manufacturers produce wheels that accurately cut any building material without negative consequences. The catalogs contain consumables designed to work with tools that have different speeds. The VyborExperta.ru team studied the effectiveness of circles from the best American and European manufacturers. Experts suggest choosing one of 3 models that are equally easy to cut profiles for gypsum boards and porcelain tiles.

Di-Star 1A1RSS/C3-H Technic Advanced

Engineers of the Ukrainian-Italian company have developed a cutting-off segmented diamond blade for universal use. The wheel is designed for dry cutting at 6650 rpm and is suitable for use by personnel with little experience. Consumables are supplied with angle grinders and wall chasers. The design feature is the complex shape of each of the 10 segments. Advanced geometry ensures maximum heat dissipation even when the operator uses power tools with the covers closed.

The complex shape helps to remove not only heat, but also dust. The wheel copes well with reinforced concrete, granite, paving slabs and baked bricks. The diameter ensures high productivity when gating walls made of monolithic concrete. The manufacturer increased the height of the diamond layer to 12 mm. This helped to increase the resource and efficiency of equipment use.

Advantages:

Work without breaks for up to 5 minutes;
Manufacturer's warranty 3 years;
High cutting speed;
High-quality cutting at a depth of up to 5 mm;
Tight fit.

Flaws:

High price.

Bosch Standard for Universal

Engineers from a German company have developed a universal cutting tool that does not require sharpening or regular replacement. The tool steel wheel has 8 large segments located at a slight angle to the axis and a turbocharged edge structure. This allows for heat dissipation and good contact with the material being processed. Consumables are designed to complete grinders and wall chasers operating at a speed of 12,250 rpm.

The thickness of the circle is 2 mm - the optimal balance for working with concrete, metal or ceramics. The layer of cutting crystals has a height of 10 mm, providing high performance and increased service life. Artificial diamonds with sharp edges are evenly spaced in the edge structure. This guarantees high-quality processing of the material after prolonged use.

Advantages:

High cutting speed of concrete;
Ideal surface geometry;
Lack of combat;
Smooth cut without defects for any building materials;
Low price.

Flaws:

Not detected.

Dewalt DT3711

Sintered universal disc made of high-quality tool steel, which provides the components with high wear resistance and strength. The classic segmented edge allows you to work at high speeds - up to 12,000 rpm. Good heat dissipation increases service life and thermal stability. The equipment is designed for dry cutting and is used on angle grinders or wall chasers.

The high strength of steel made it possible to reduce the thickness of the circle to 1.8 mm without losing the main performance characteristics. The tool cuts all building materials carefully, without chipping. The edge does not become greasy due to the uniform distribution of diamonds throughout its thickness.

Advantages:

Durability;
Low price;
Strict geometry;
Tight fit.

Flaws:

The edge height is only 7 mm.

Features of working with the tool

In order to make the most of the working life of an expensive diamond tool, you need to adhere to important rules for its operation:

cutting reinforced concrete should be done in successive shallow passes;
the first pass is performed to a depth not exceeding 10 mm;
the depth of each subsequent cut should not exceed 15 mm.

Before starting work, you need to accurately determine the brand of concrete and its frame, since each material requires different types of diamond cutting tools. If the concrete is reinforced with steel rods and the thickness of the part to be cut exceeds 100 mm, a special disk must be used.

It is also taken into account whether the concrete mass is fresh or old to be cut, because over time the properties of this material change. Old concrete is always stronger than fresh concrete; cutting it requires more expensive tools. The larger the cutting wheel's heavy-duty filler, the slower the cutting needs to be.

How to choose diamond blades

Wheels with a cutting edge made of artificial diamonds are used for high intensity construction work. The tool allows you to make hundreds of cuts when used correctly. When choosing consumables, you need to take into account not only brand awareness and price, but also technical characteristics. This will help you purchase products that meet your goals. Understanding the features of a diamond wheel, you need to evaluate its diameter and design features. The cutting tool must be designed to work with a specific building material. The specifics of dry or wet cutting are also taken into account.

Diameter

The outer diameter must correspond to the design features of the tool used. Particular attention is paid to models equipped with a casing: equipment with a large diameter simply cannot be installed if the protection interferes with it. Before purchasing, you should check the diameter recommended by the power tool manufacturer. If you have a choice, then it’s worth remembering: the larger the radius, the deeper you can cut the building material.

The inner diameter of the circle is of particular importance. The parameter must correspond to the characteristics recommended by the manufacturer of the angle grinder or wall chaser. Deviations are not acceptable, since the equipment will dangle on the shaft, which can result in serious injury, tool breakage, and damage to the material being processed. The most widely used models are those with mounting holes of 22.2 and 25.4 mm. The manufacturer indicates all dimensions on the components in the labeling, duplicating the information on the packaging.

Processing material

Building materials differ in different densities, hardness, and structures. High-quality cutting requires different speeds and specific dynamics of heat removal from the working area. Depending on the structure of the material being processed, crystals with different grain sizes are used. Designers select the optimal edge configuration and distribute diamonds evenly throughout the entire depth.

The buyer does not need to be a materials science specialist to select components for his tool. You need to know what material you will be working with and purchase the appropriate equipment. Manufacturers produce wheels for working on metal, concrete, ceramic tiles, porcelain stoneware, and stone. Standing apart from this list are universal discs that effectively cut several materials at once. Using such equipment allows you to save time when replacing it. When choosing a universal circle, you need to clarify what materials it is intended for. Information can be obtained by examining the surface - the manufacturer applies special markings or inscriptions.

Type of diamond blade

Manufacturers produce circles that differ markedly in their design. Solid discs are made from a solid metal plate with cutting crystals applied to the outer edge. This type of wheel is used when cutting at low speeds. To remove heat, slots are made in the steel plate, which can have a simple or complex shape. The slots have a size of 10-15% of the total diameter and are directed towards the center; they divide the disk into 8-10 segments. This type of equipment is called segmented; the tool is designed to work at high speeds.

You can find circles with frequently notched edges. This tool is classified as a turbo. The equipment is highly durable and can operate under constant loads. Combined discs with a segmented surface and notches are called turbo-segmented circles. The main advantages of this product are good performance and versatility in relation to the materials being processed.

Wet or dry cutting

Heat dissipation is the most important problem that has to be solved when cutting building and structural materials. There are three main approaches: reducing the cutting speed, increasing the area due to segmentation, and supplying a cutting fluid to the working area. The last solution is called wet cutting. The technique requires the use of a special tool, which has a complex design and high price, and requires work skills. It is paired with consumables that are designed for wet cutting.

Dry cutting wheels are the most widely used. This is facilitated by the emergence of structural materials with high heat resistance and wear resistance. The equipment operates at high speed and is only slightly inferior in productivity to wet cutting tools. The only drawback is that it is required to periodically stop work, which is unacceptable when solving critical problems.

The best tile cutters

Features of cutting with a grinder

After choosing the equipment and the circle for it, before cutting concrete with a grinder, you need to familiarize yourself with the recommendations for carrying out the work:

Cutting cinder block

The tool must be held with both hands. In this case, if a reverse strike occurs, it can be held, which will minimize the displacement of the cutting line;
Work should be carried out only on a flat surface so that the person’s balance is maintained;
The power cord should be located on the opposite side of the drive to prevent accidental damage to it. A cut cord can cause a shock wave from the unit and a short circuit in the electrical network;
The tool must be held firmly in your hands until it stops completely;
When changing the place of sawing, the grinder must be turned off so as not to accidentally touch surrounding objects;
When there is a power outage, be sure to unplug the equipment from the network. This will prevent it from turning on when electricity is supplied without operator control.

Tip: During operation, the discs become very hot, so after turning off the grinder, you should not touch it until it cools completely.

Working with brickwork

Cutting concrete along a line

After the grinder for concrete has been prepared, work can begin.

For this:

The cutting line is outlined. At the same time, it is advisable to fasten wooden blocks along the line, which will make the cut line more even;
The grinder is turned on and a cut is made with a depth of approximately 5 - 10 mm;
The bars are removed;
A cut is made to the required depth. If the cut is made dry, the procedure should be stopped periodically to allow the instrument to cool.

Carrying out preliminary marking work

The video shows in detail how to cut concrete with a grinder correctly. The process is best performed with the tool cooled.

For this:

An ordinary spray bottle sprays water directly onto the furrow to reduce the amount of dust;
Water is sprayed directly onto the disk, in the absence of a nearby power source. This will reduce the heating of diamond blades and extend their service life;
If it is not possible to spray liquid onto the disc, cooling can be done with air. Periodically, the circle should be removed from the cut and given the opportunity to work in the air.

Working with a grinder with manual cooling of the tool

If you have questions about cutting concrete, or if you want to know how to polish concrete with a grinder and other details on using similar equipment, check out the video in this article.

Which diamond blades are better?

Our experts selected products from the world's best manufacturers, considering offers in all categories. High-quality universal discs exist, but they are more suitable for home craftsmen who have decided to make major renovations to their home or build an extension. Professionals should use a specialized tool, and each category has its own leader. We recommend the following brands of diamond blades:

Makita B-28092 – for cutting concrete on a construction site;
Graff GDD 17 125.10 – for low-cost brick work;
Dremel DSM540 – for high-precision cutting on ceramic tiles;
Di-Star 1A1R Decor Slim (11115427010) is a good choice for the decorator;
Hammer 206-232 – for wet cutting of metals;
DeWALT DT40252 – for intensive work with any metals;
Bosch Standard for Universal 2608615059 is a durable and reliable universal.

Good equipment means high productivity, operational safety and high-quality cutting. Only the best wheels, distinguished by their thoughtful design, perfect edge quality and heat resistance, are worthy of this high title.

Types of disks, their features

The industry produces several types of diamond wheels that can be installed on an angle machine:

with a segmented body;
turbo diamond;
wave in a turbo-diamond case.

Diamond wheels of these types are capable of withstanding a very large technological load, designed for cutting reinforced concrete, but the cost of such attachments is the highest. They are divided into professional and household, which is typical for most construction tools. For different operating conditions, they are produced by industry in different designs.