What are the bits for angle grinders?

Grinding and polishing wheels for angle grinders

It is no secret that the angle grinder is successfully used in the construction industry as a tool for cutting various materials, grinding surfaces, as well as their polishing. For angle grinder developed a lot of nozzles, which greatly accelerate and facilitate the work process when processing wood, metal, stone and concrete. In this article we will look at grinding and polishing wheels for angle grinder.

When performing construction work, craftsmen often have to remove various irregularities, seams and laps on concrete surfaces. To make a concrete wall or floor become smooth and polished, a special nozzle is used. a diamond cup. They, in turn, have several varieties. Depending on the type of work that needs to be carried out on the concrete, selects and type of nozzle. The following is a list of tips for working concrete and other hard surfaces.

Double segment

This nozzle is widely used for roughing out “wild” stone, brick and concrete walls. The cutting part of the nozzle allows you to eliminate various defects on the above surfaces, as well as cut uneven, thick layers on concrete screeds.


Considered to be gentler than the Double Segment Sanding Tool. It can be used to grind the surface more gently. The tool is lightweight, with good performance and durability.


Heavyweight for rough but productive concrete work. Not only does the tool grind the surface, but it also shears the material during operation. This greatly increases productivity and reduces the wear on the cutting elements of the attachment.

Most often, the sanding disc “Square” is used to prepare the surface for the application of various kinds of polymer coatings on it. This fact is explained by the fact that this nozzle does not have a pronounced grinding effect. The surface is roughened after machining with Kvadrat tool, which increases adhesion to polymer compositions.


It is used for finishing work and is the most popular attachment, as it is lightweight and multifunctional. Boomerang” is equal to two-row diamond cutters in productivity, but works more “softly” and steadily. It is also much easier to level flats with this cup.


The nozzle is distinguished by its high productivity, resistance to wear. It is mainly used for processing hard surfaces: stone of high hardness, reinforced concrete and solid concrete, marble and granite. Also with the Turbo you can chamfer and remove edges on marble slabs. In addition, the grinding attachment allows professional masons to make shaped cutouts when creating monuments from stone.


Used for high-speed, rough and semi-finished sanding of granite, stone, marble and hard concrete. The diamond grinding cup is distinguished by its high performance and durability. Often used for removing old coatings on concrete surfaces.


Turtle” nozzle is used for polishing granite and marble and giving the surface a mirror shine. Such abrasive nozzle can have different size of grain, as the coarsest (for rough grinding), and very fine (for finishing).

Also felt or felt grinding wheels are used for marble polishing. All these supplies are attached to the base with Velcro.

Types of brushes for angle grinder on metal

Cord brush for angle grinder in appearance resembles a similar device for a drill. The main difference is the wide hole in the center. It is designed to be mounted on an angle grinder. A nut is screwed on top to eliminate axial displacement in the process. Some cord brushes are equipped with their own clamps. The main characteristics of the brushes are:

  • outer and inner diameter;
  • shape;
  • the bristle material;
  • type of pile by stiffness;
  • the thickness of the bristle elements;
  • maximum number of revolutions.

Variety of tips on the angle grinder for woodworking

Chipper disc

This attachment almost completely replaces this hand-held tool.

Indispensable thing, if you need, for example, to produce rough processing of a log. in the construction of a log cabin, the preparation of fence supports and so on.

  • In this case the protective cover can be removed. Such a nozzle is one-piece, and its destruction does not occur. But protection against flying chips (goggles, tight clothing, gloves) is required.
  • Only work with an “angle grinder” in which a second handle is provided (or installed) is permitted. Angle grinder must be held when roughing wood necessarily two hands.

Deburring disc

The main purpose of such attachments is to remove the bark from the wood, debarking the workpiece. If the “angle grinder” in capable hands, then with such a device can make a selection of material. For example, if it is necessary to cut a bowl. If you build a log cabin, the angle grinder with this attachment perfectly replaces the carpenter’s axe.

In some cases, you can cut a log with a skinning disc. True, the cut will be wide, and the waste (chips, sawdust) will get a lot of.


These attachments come in a variety of designs. The main difference between these tools is the size of the abrasive grains.

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They do not differ much from the rasp files by the specifics of use. The only difference is the speed of the technological operation. With some skill, such nozzles are also useful for finishing wood.


They are there, and specifically for wood. The assortment is large, since this type of nozzles differs in configuration, positioning and size of teeth.

  • grooving.
  • Preliminary edge smoothing.
  • Bowl cutter.
  • Sawing (for small section wooden workpieces).
  • The blade guard must not be removed when processing wood with these attachments.
  • Each product is supplied with instructions. It unambiguously states for what types of work this nozzle is designed, the recommended revolutions of the “angle grinder” and so on.

Wood sanding

If you decipher the abbreviation angle grinder, it is clear that it is finishing. the main purpose of “angle grinder.

Cord brushes

Primarily used for primary (coarse) sanding of wood, when you want to smooth out the irregularities of the sample.

socket head discs

The name speaks for itself. Such nozzles are used to process the end parts of wooden workpieces (cuts). Especially effective if you have to deal with angular (bevel) cuts.

Petal nozzles

The most used sanding accessories for “angle grinder”.

Such nozzles are used consistently, so for processing wood, they need a few. Grinding begins with a disc with a “coarse” abrasive, and gradually its grain size must be reduced. Consequently, the accessories are periodically changed while working on the angle grinder.

Grinding wheels

The most universal attachment for the angle grinder. It is quite sufficient for various degrees of sanding. The nozzle itself is a metal base, on which the circles are attached to a particular grain size. They are easy to change, either as they wear out or if you move to another area of work. Consequently, only grinding wheels are consumables. The nozzle itself can be used indefinitely.

Wood Polishing

Brushes, disc circles are used for this purpose. Their “working elements” can be made of sponges, felt, fine-grained “sandpaper” and a number of other materials.

bits, angle, grinders

This article provides examples of only the basic types of nozzles on the “angle grinder”. There are quite a lot of products of this class, so it is not difficult to choose the best option of the device for processing any wood. The author hopes that the above information will help the reader with this.

Methods of unscrewing if the disc is jammed

What to do if the clamping flange jams? This trouble, when nakulya nut, often occurs if during work with thick and tough materials, the tool is jammed in the workpiece. In this case, the abrasive wheel often breaks, and the continuing rotation of the spindle tightens the clamping flange. There are several ways to unwind an angle grinder if the disk is jammed.

Using a gas wrench

This method is not considered completely safe, because you can break a stopper, although in most cases, unscrew the nut. Do not apply too much force to the torque wrench to avoid breaking the spindle lock. The spindle retainer is designed to withstand the force of a standard spanner.

You can unscrew an overly tight flange with 2 gas wrenches. To do this, break off the protruding ends of the abrasive wheel with pliers so you can get to the bottom flange with the first gas wrench. Next, clamp the two flanges with wrenches and turn them in opposite directions (depending on what threads on the spindle. right or left).

bits, angle, grinders

Disassembling the Geareducer

If the retainer is broken, to remove the tool from the angle grinder, you will have to disassemble the gearbox. Break off the edges of the remaining grinding wheel with pliers, so that you can get to the bolts that hold the gear cover. After that unscrew the fasteners and open the gearbox. The lid can be removed together with the pinion shaft. Next, this shaft should be clamped in a vice with aluminum spacers between the steel jaws and the flange can be unscrewed with a gas wrench (don’t forget to determine the unscrewing direction).

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Heating the nut

The nut can be heated with a gas torch, construction hair dryer or blowtorch. A heated flange can usually be unscrewed with a standard angle grinder wrench.

Grinding down the jammed wheel

If the nut will not unscrew after using the first 3 methods, the remaining abrasive wheel between the flanges can be ground. To do this proceed as follows.

  • As much as possible, use pliers to remove the rest of the wheel around the edge of the nut.
  • Grip in a vice a piece of sheet metal of the same thickness as the disk itself, turn on your angle grinder and grind the rest of the disk against the edge of the sheet metal.

A piece of abrasive wheel can be clamped in a vice instead of iron. Grinding of tool remains between flanges is then faster and the nut can be unscrewed by hand.

But great care is needed when using a stationary abrasive wheel as it is possible to damage the flange geometry when grinding tool remnants. If this happens, you will have to torque the nut.

Use of penetrating grease

Apply WD-40 fluid liberally to the flange-shaft joint. It tends to penetrate into interthreaded spaces and small cracks. After applying the fluid wait about 5 minutes and try to unscrew the fastener with a standard wrench.

With the use of a torque wrench

Some owners of grinders in a situation when jammed clamping nut, install in the peorator nozzle “chisel” or “jackhammer”, insert it into the flange hole at an angle and turn on the jackhammer mode without rotation. Accordingly, the stop button must be pressed. Just a couple of light strokes with the accelerator (so as not to break the shaft lock) is enough to make the nut rotate.

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Cut the clamping flange with a hacksaw

This method can be called a radical method, because you have to buy a new fastener, and it is used if the nut is not unscrewed by any other methods. To cut the flange, clamp the stop button so the shaft does not rotate and use a metal saw to cut the fastening nut.

Sander bits

Sanding disc is sandpaper, made in the form of a circle on a Velcro or petals. It is used to smooth out irregularities on the surface of metal, wood, plastic and other materials. Also the sanding disc is used as the final stage of processing the material. It is worth noting that such nozzles come in different obrazovaniya: so, sandpaper up to 100 grit is used to remove a large amount of material, and sandpaper grit from 100 grit is designed for finishing work.

Another type of sanding attachment is a sanding brush. they are effective for removing rust, old peeling paint or caked-on dirt from garden tools.

  • wire disc. suitable for cleaning hard-to-reach places: crevices, narrow spaces, and corners
  • wire bowl. good for treating large surfaces

Metal brushes for angle grinder to clean rust and woodworking

Many people believe that with the help of brush heads, which are used for angle grinder, you can only clean steel products. However, these tools are also used when wooden parts need to be treated. Brass wire nozzles are used for wood.

Brushes have several advantages over abrasive discs. They have a longer service life and lower cost. They are used when it is necessary to remove rust or old paint from the workpiece. It should be mentioned separately that brushes are indispensable tools when working in hard-to-reach places.

Brass nozzles on the angle grinder for woodworking allow you to remove paint material as effectively as possible. Brushes are not only used for cleaning surfaces. This tool is also used when you want to artificially age the wood. This process is called brushing.

Brushing is used to create unique interior design objects. Using an angle grinder, you can work on small objects. On an industrial scale, such a tool is not used. The brushing attachment on the angle grinder enhances wood features, such as rings and various irregularities.

Metal brushes for angle grinder used when you need to remove rust or old paint from the workpiece

Metal brushes can quickly and efficiently remove old paint from steel pipes, remove rust and patina. When choosing such tools, you should pay attention to their hardness, because the operational efficiency of brushes depends on this indicator.

Nozzles by type of work

Different manufacturers produce nozzles for angle grinder. They can be expensive and budget in price, satisfying the needs of any category of consumers. When buying a particular type of accessories, you need to take into account that it is suitable for the parameters of a particular model of angle grinder. The most important parameters are the diameter of the seat, the maximum possible diameter of the disc and the number of revolutions of the power tool. The larger and heavier the angle grinder, and therefore more powerful, the less safe it is to work, so some attachments are recommended to use on the angle grinder rigidly mounted in a special stand.

Cutting operations

The most common type of work that can be performed with an angle grinder is cutting material with cutting discs. This type of nozzles are available in different diameters, thickness, design of the cutting element. In nature, there are:

  • Metal cutting discs. They enable you to cut various steel grades and non-ferrous metals. The diameter of such a nozzle varies from 230 to 115 mm. Body thickness can be from 3.2 to 1 mm. Metal cutting discs have in their design an abrasive material that makes up the body, bonding material (a special mesh of fibers that does not allow the disc to break) and a mounting ring.
  • Cutting discs for stone and concrete. This also has a base, but made of steel. Working part of such discs has a diamond coating. Concrete discs have a certain direction of rotation, which must be taken into account when installing the nozzle on the angle grinder.
  • Circular saw blades for wood are nothing more than disc saws adapted for angle grinders. This is one of the most dangerous types of nozzles for angle grinder, so work with such a tool is strictly prohibited, if the protective cover is removed. It is better if the angle grinder will be installed permanently, but even this does not guarantee protection against jamming and rupture of the disc.

Milling operations

A variety of cutters have also been developed for the angle grinder. They can differ in the number of cutting teeth, diameter and thickness. The list of works that can be carried out with the help of cutters on the angle grinder:

  • Make grooving. The specificity of the angle grinder is the insufficient power of its motor for full work with cutters, so the wood should be fed to a small thickness, reaching the desired depth in a few passes.
  • Cut cups.
  • Perform rough edge trimming operations. For this purpose, it is necessary to install an additional guide rail on the angle grinder, or use it in a fixed position on the milling table.
  • Saw small workpieces made of wood. This operation should preferably be performed when the angle grinder is fixed in the stand.

Using an angle grinder cutter as an attachment is one very dangerous activity because the cutter has a certain thickness and rigidity. If such a tool jams, there is no doubt that the angle grinder will simply break and it can injure or injure the operator!

  • Firmly fasten the angle grinder in a special milling table.
  • Do not use the power tool’s trigger lock during operation.
  • Only remove a small layer of wood in one pass.
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Grinding and sharpening

By trimming operations with an angle grinder understand the removal of unnecessary material surface layer, which can be rust, old paint, cement and other kinds of dirt. Sharpening also removes some metal to restore the cutting capacity of the tool. Nozzles for the angle grinder to perform such operations have a view:

  • Flattened, twisted bead blades. Such a cap consists of a pair of metal cups with braided steel wires sandwiched between them. This tool can be used for machining steel, wood and stone.
  • Cup-shaped wheels with twisted metal wire beads. This type of equipment is structurally similar to the previous one and is designed to perform the same operations.
  • Single sided discs with diamond plated blades. Diamond roughing discs are designed for use on stone or concrete surfaces only.
  • Sharpening flat abrasive stones for angle grinders.

Grinding operations

Angle grinder can grind wood, metal and other surfaces. Several nozzle variations have been developed by manufacturers for these applications in wood:

  • Cord type brushes. Their primary function is roughing and primary treatment of wooden surfaces. They are perfect if you have a rough surface and need to level it out.
  • Grinding discs. This type of nozzles is a disk-shaped type of tool, one side of which on the edge of the circumference of the abrasive is applied from diamond or other material. End grain discs are very useful for corner cuts.
  • Blade-type bits. Type of disc-shaped tool, which, like the previous item, has a working area on one side. There is also an abrasive here, but it is not obtained by spraying, but consists of sandpaper blades glued on top of each other. Depending on the grit size of the paper, there are bits for rough and finish operations.

Angle Grinders // Bits | I Like To Make Stuff

Personal protective equipment is essential when working with sanding accessories: spectacles are compulsory. This is due to the fact that the wheels of this design are used without a protective cover, and the abrasive particles can fly in different directions!

In order to find the right paddle disc, it is important to consider the density of the abrasive and the working area created by the rotation. When sanding irregular surfaces, high-density abrasives are preferred. Can be used for even workpieces with standard discs.

Please see the table below for the top of the best petal bits.

CategoryPositionName PhotoDescription
Economy 1. FIT 39554 By right the best nozzle in the economy segment. Ideal for steel and stainless steel. Typically used for cleaning weld seams. The shape of the disc is straight. by diameter 12.5 cm, and the fit is 2.2 cm. The grit level is P80. Thanks to its conical shape, the abrasive blade is ideal for work on curved surfaces.
2. Stayer 36581 The nozzle for a wide range of applications. Grinds wood and stone with the same quality, but the model is slightly behind its metal rival above. The abrasive of the circle consists of aluminum oxide, and the base is fiberglass. Has higher grinding speed thanks to the blade arrangement.
3. KLT meadows Blade with flank type, proves good for processing steel and wood. Some people also use the nozzle for processing plastic, but here already at your own risk. Among the essential pluses I can single out resistance to wear. Abrasive grain size P60.
Norm 1. CLT-1 36563 The disc is specially designed for angle grinders. All-purpose universal. Grinds plastic, concrete, stone, metal and wood equally well. The blades are coated with aluminum oxide. Capable of up to 12,000 rpm. Thanks to electrostatics in the application of the abrasive element, the nozzle has a perfect grain distribution.
2. Matrix 74042 The base is fiberglass. Abrasive part consists of radially positioned cubic grains. It is mostly used on machine tools, but it works just as well on angle grinders. The only thing beginners might not be able to cope with the fine sanding work with this disc.
3. Makita D-28553 Japanese version of the consumable in flat design, which is good for machining elements with flat surface. The base consists of fiberglass. The blades are radially positioned, which improves the process of grinding ferrous and non-ferrous metals. Most consumers order the rust-removing and chamfering attachment. Se80 grit and allowable peak RPM of 8,600 per minute.
Premium 1. Vulcan NORTON Grit size of the nozzle is P40. Disc prioritized to be used for finish sanding. The distinctive feature of the nozzle is the zirconia corundum abrasive base. This solution increases the value of wear resistance and gives a bonus to performance. Vulcan is made by Poles.
2. Skrab 35880 Elastic wheel with a special flap arrangement that increases productivity in metal, wood and stone processing by 80% compared to the economy segment. The grit of the disc is P22, and the peak speed for processing can be at 13,000 revolutions per minute.
3. Wurth Grinding wheel from Chinese manufacturer. The holder is made of fiberglass and the abrasive consists of a special polyester type fabric. The aluminum oxide grit itself. Priority is given to stainless steel and steel in the final stages of processing.

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