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ANGLE GRINDER: Types, Prices ans Brands as Makita and Bosch

What is the Angle Grinder For ?

An Angle grinder is a type of tool used to grind workpieces. It is used as an abrasive wheel as a cutting tool. The rough surface of the grinding wheel cuts small portions of the workpiece as needed. Also known as a mill.

A shredder is usually used to accurately shape and finish materials given with low surface roughness and high surface quality. It is primarily to finish work that eliminates relatively small amounts of metal, to deliver high-precision products. However, certain grinding applications also involve the rapid removal of large volumes of metal. It consists of a bed with a fixed guide to hold the workpiece; and an energy-driven wheel that rotates at a predetermined speed.

The angle grinder head can be adjusted to move through a fixed workpiece; or the workpiece can be moved while the head remains in a stationary position. The position of the grinding head or table can be controlled with a handwheel or a computerized numerical controller.

Hand Grinder

Consists of a bed with a fixed guide to hold the workpiece. It also has an energy-driven wheel that rotates at a predetermined speed. The grinder head can be installed to move through a fixed workpiece or the workpiece can be moved while the head remains in a stationary position. The position of the grinding table or head can be precisely controlled using a handwheel.

Bench Grinder

It is operated manually and generally has two wheels of different grain sizes, which are fixed on a workbench or a floor stand. This is for finishing and roughing operations. It is mainly used for shaping tool bits and making or repairing different tools.

Pneumatic Grinder

Uses air for the use of high speed grinding wheel rotation, cutting wheel, rubber wheel or wire wheel and other metal parts for metal processing of grinding, cutting, oxidation, grinding, brushing and polishing.

Angular Grinder

The angle grinder is used to shape the outside of a workpiece. These machines accept workpieces in a variety of shapes, as long as they can be rotated through a central axis. In a cylindrical grinder, both the workpiece and the wheel are rotated simultaneously.

Electric Angle Grinder

grinding can be a bit heavy, and can be particularly difficult for those with restricted mobility in their hands and wrists. To help, there are a variety of electric grinders that will make the grinding process easier than ever.

Battery Angle Grinder

There are many grinder options on the market that have batteries, these are usually designed with over current protection circuit, this turns off the battery power in case of an overload situation, which reduces the risk of causing permanent damage to the engine also have a zero voltage safety reset prevents accidental starting when inserting a charged battery.

Mini Angle Grinder

The mini wood grinder is the most versatile wood cutting tool you’ve ever had. The mini grinder is very easy to use and allows you to do everything from shaping to the finest details and even sanding.

Home Angle Grinding: How To Make It ?

The bench grinder uses a sanding belt to grind wooden or metal objects. Some have the ability to accept a disc attachment that fits to the side of the sprockets of the larger belt. This assembly often has a flat guide. it allows for a homemade bench grinder sanding disc, Trench and trick to work the wood into small benches It shows how I transform a mini bench grinder into a disc sander and how I make the sandpaper adhere to the outer surface of the grinding wheel …

Wood Cutting Grinder

When it comes to carving, shaping and sanding wood, there are many effective tools to consider. However, only one can be adapted to carry out the three common carpentry tasks with ease.

If you are a woodworker looking for a quick and easy method to quickly carve, then shape and finally sand large grooves and even chainsaw clippings, the angle grinder is the tool for you.

However, keep in mind that the angle grinder will remove a lot of wood in a hurry and, like all power tools, when using your angle grinder on wood, be sure to wear safety goggles.

How to Cut Ceramics with a Grinder ?

  • The most effective way to cut ceramic tiles is with a wet tile saw, but not everyone has access to one of these special tools.
  • You can also cut tiles with a 4-inch angle grinder with a stone blade, and although the cuts are not as clean as with a tile cutting board or a wet saw, it is an acceptable method for hard cuts around heater vents.
  • Doors and against walls where they will be covered by skirting or finishing materials. It excels by helping to make angled cuts against a wet tile saw, which is designed for straight cuts.
  • Cut directly down on the tile surface, making smooth passes through the lines of your cut while holding the grinder blade vertically against the tile and along the mark.
  • You can also hold the blade against an edge horizontally, flush with the tile face, working the shredder blade edge down into the tile.
  • Slowly to make rounded and precise edges for drains, moving slowly while grinding away small pieces instead of cutting into the tile. Straight cuts are made by pushing the blade into the tile vertically and cutting through the tile along the marks.

How to Cut Marble with Angle Grinder ?

  • Marble is a natural material used in the construction industry for the manufacture of floors and countertops. This porous stone is considered a soft material compared to stones such as granite.
  • Cutting marble is a delicate process that requires precision cuts to achieve a professional result. Patience and the right blade are crucial to avoid damaging the marble, which could be costly to replace.
  • A grinder is an ideal tool for cutting marble when equipped with a diamond cutting blade.
  • Place the marble on a sturdy workbench or table with an area large enough to hold the marble so that it does not protrude. Marble has many streaks that are its weakest points.
  • Allowing marble to hang over the edge of the workbench while cutting can cause it to break. Attach a diamond cutting blade to an angle grinder. Most home improvement centers sell a wide variety of diamond cutting blades.
  • Make precise marks on the surface of the marble at the location of the cut with a pencil or white corrector pencil.

How is Concrete cut with a Grinder or Grinder ?

Check your grip

Before using the angle grinder, try it out for testing and test the weight to make sure you can handle it. Most grinders will have two handles that will help keep the tool stable, and you should make sure you can hold it comfortably with your dominant hand.

Keep in mind that you will need to apply some pressure as the blade passes through the concrete, which will make the tool appear heavier due to vibrations.

Protect Yourself

In addition to making sure the safety guard on the angle grinder is in place and safe, you should use other methods of protection. Avoid wearing loose clothing and wear gloves to protect your hands and improve your grip.

Small particles of concrete can become loose and fly away during the cutting process, which can be a real hazard. Wear a pair of goggles to make sure you don’t have any residue in your eyes. It is also wise to wear a mask to reduce the risk of inhaling concrete dust.

Mark the Cut Line

To make sure you get a precise cut with the angle grinder, you must mark the position of the line to cut with a ruler and pencil.

From this point on, you should carefully use a hammer and chisel to mark along the pencil line, making sure that the resulting groove is deep enough to hold the blade.

It should not require more than three strokes, depending on the thickness of the concrete, and should be completed along the entire line. This process will ensure that you only cut when necessary and that the blade is not in danger of skidding on the surface.

Prepare your work area

Make sure your work area is free of unnecessary items so that it is not obstructed while using the angle grinder.

In addition to eliminating any possible tripping hazards, make sure that the power cord of the appliance is always on the back and is not in danger of falling into the path of the blade. If you are working in an enclosed area, make sure it is well ventilated.

Operate the grinder correctly

Be sure to keep both hands on the grinder when it is on and when using it on concrete.

Before allowing the blade to come into contact with the concrete, wait until the blade revolutions reach maximum speed and make sure you are prepared for the pressure change when you apply the blade.

Do not be distracted when using the tool and make sure it is turned off at the power supply when it is no longer needed.

Car Polishing Grinder

A high-speed angle grinder with a polishing wheel will give you the best

result, but be careful: it takes practice to master the technique so as not to unintentionally damage the paint.

Deeper scratches and oxidation will require working in the affected area longer with an angle grinder for best results.

Top Grinder Brands: Parts and Accessories


The Bosch has a powerful engine that produces 11,000 rpm without load, making this compact grinder a powerful tool. It was designed for concrete contractors, vehicle manufacturers and other professionals who need a compact grinder.

With a well-designed grip, a locking slide switch, a two-position side handle and 11,000 rpm without load, this workhorse can do the job. It is well suited for metal fabrication, concrete restoration, pipe installation and more.

It uses brushes that stop the grinder when preventive maintenance and epoxy coated field windings are required for longer tool life. Sliding lock switch, two position side handle and 3.75 lbs. weight increase user comfort and control.


The Einhell Grinder from the German company Einhell is impressively quiet and low vibration. This improves operational safety. Ergonomically shaped soft handles on the tool and additional handle and an extra slim design provide good manual stability and extra comfort.

The disc protector provides additional safety, which can be adjusted quickly as the adjustment does not require tools. The flange wrench is always neatly stored in the handle. The additional handle can easily be secured in three different positions.

This grinder is also practical after the project, with useful features such as a cable clip that facilitates compact and safe storage. It comes with a full 2-year warranty and after-sales support.

Also backed by our in-house spare parts department with an online ordering service for added convenience.


Powerful grinder with 750W maximum output power for difficult grinding jobs. It is a grinder with a wheel diameter of 4-1/2 inches. Ideal for sharpening, cutting, grinding, rust removal and surface preparation.

It has a wrench that helps replace wheels quickly and easily. Includes 2 extra carbon brushes, no need to worry about using the brush. The good 6.5 foot power cord gives you plenty of room to work.

Comfort and well-balanced, heavy metal gearbox for increased durability and grinder life. Epoxy-coated field windings provide abrasive dust protection and a two-position side handle for maximum operator comfort.

Black and Decker

The Black & Decker grinder is ideal for sharpening, cutting, grinding, rust removal and surface preparation. This grinder features a metal gearbox for durability and long life.

It features a 3 position side handle that provides greater comfort and control for use with a variety of materials and angles. It also has a spindle lock for easy accessory changes.


The Makita grinder combines 7.5 AMP power with comfort and engine protection features for longer lasting industrial performance. The grinder provides 11,000 RPM, with soft start for soft starts.

Range of durability features include labyrinth construction that seals and protects the motor and bearings against dust and dirt for longer tool life, as well as a protective zig-zig varnish designed to seal the armature against dust and dirt.

Ease of use features include an extra large paddle switch for comfortable operation and a lockout/connection function for continuous operation. With a side handle that can be easily installed on either side of the tool.

In addition, the “tool-free” wheel guard adjustment provides easy clamping. This grinder also has an AC/DC switch for use with alternative power sources. It is a versatile and powerful grinder designed for cutting, grinding and polishing applications.


Ryobi is extremely versatile and has a wide range of uses, from cutting and grinding metal, sharpening blades, modeling stone or pavement to removing rust and loose metal paint and polishing.

The 3-position handle ensures optimum comfort and control in all cutting and grinding tasks. While a tool-free wheel guard and spindle lock makes it easy and quick to change accessories and adjust the guard position.

For added comfort, Ryobi’s unique micro grip texture makes the angle grinder easy to hold and use for extended periods of time. Battery-powered technology gives you the freedom and convenience of carrying out projects whenever and wherever you want, without the hassle and restriction of cables and power sources.


The DEWALT grinder has a high-power 4 HP 8,500 rpm motor with overload protection that provides higher operating speeds under load. Epoxy coated field and armature provide long life against abrasion from airborne debris.

A low-profile gearbox allows work in confined areas. Automatic shut-off brushes shut down the tool when brush changes are necessary to prevent tool damage, and the 2-position side handle provides improved ergonomics for specific applications.


Hitachi grinders offer incredible power, great performance, smooth operation, easy to handle design and low vibration in a solid workhorse of a grinder, all at great value.

It is an ideal grinder for sharpening blades, removing cast iron fin, finishing various types of steel, bronze and aluminum materials and foundries, grinding welded sections, cutting synthetic resins, slate, brick, porcelain, marble, reinforcing bars, wearing rusty parts and old paint, etc..

It has a 5/8″ x 11″ spindle thread and comes conveniently with (5) Hitachi abrasive wheels designed for metal or stainless steel grinding applications. However, uses are endless depending on any 7/8 inch tree, 4-1/2 inch wheel or blade you put in.


Powerful engine designed for heavy-duty jobs to perform a wide variety of cutting and grinding tasks, the compact design of the housing shape allows for a comfortable grip resulting in superior ergonomics.

Long resistance by high quality switch and durable carbon brush

Shaft lock for quick and easy accessory change, spiral bevel gears provide less vibration, reduce noise level and prolong service life.

Explosion-proof guard for maximum user safety, on/off slide switch for one-hand control and user safety, optimized vents for better cooling.


Skil grinders have a powerful engine. Guard adjustment without tools. Rugged metal gear housing for durability. More attractive compact grip design for comfort and control.

Powerful 6.0 A motor with 11,000 RPM, toolless guard for quick adjustments, rugged metal gear housing for ruggedness and durability, compact grip design for comfort and vibration reducing handle with key storage.

Parts of a Grinder

Parts of a grinder include protective housing, carbon inspection cap, switch, power cord, bonnet or polishing pad, auxiliary handle, main handle, spindle lock button, and more.

Discs for Angle Grinder

Direct: The straight wheels, numbers 1, 5 and 7, are commonly applied to internal, cylindrical, horizontal, surface, tool, grinding and hooking spindles.

The holes in numbers 5 and 7 accommodate mounting flanges. Type 1 wheels from 0.006 inches to 1/8 inch thick are used for cutting paper and grooving.

Cylinder: Cylindrical wheels, type 2, may be arranged for grinding on the periphery or side of the wheel.

Tapered: Tapered wheels, type 4, have tapered safety flanges to prevent parts from flying off if the wheel breaks while engaging.

Straight Cup: Straight cup wheel, type 6, is mainly used for surface grinding, but can also be used for grinding flat surfaces. Single or beveled faces are available.

Flared Cup: Flared cup wheel, type 11, is commonly used for tool grinding. With a resinoid bond, it is useful for snagging. Its face can be smooth or beveled.

Plate: The main use of the wheel for plates, type 12, is in the work of the tool. Its thin edge can be inserted in narrow places, and it is convenient to grind the faces of relieved cutters and bits.

Plate: Plate wheel, type number 13, is also known as a saw grinder because it is used to sharpen saws.

Safety Standards for the Use of Grinders or Grinders

Grinders are used daily in a machine shop. To avoid injury, follow the safety precautions below.

* If a wheel is allowed to exceed the maximum safety speed, it can disintegrate and cause injury to the operator and damage to the grinder.
* Wear protective goggles for all operations of the grinding machine.
* Check the wheels for cracks before mounting.
* Never operate abrasive wheels at higher speeds than the recommended speed.
* Never adjust the workpiece or work with mounting devices when the machine is in operation.
* Do not exceed the recommended depth of cut for the grinding wheel or machine.
* Remove the workpiece from the grinding wheel before turning off the machine.
* Use proper wheel guards on all grinding machines.
* On bench grinders, adjust the rest of the tool from 1/16 to 1/8 inch from the wheel.

How to do Maintenance and Grease an Angle Grinder ?

The preventive and constant maintenance of your grinder will allow it to work properly, doing it on time will avoid future expenses and headaches, here are some tips and recommendations for maintenance:

  • The first procedure you should carry out is the inspection, check the air ducts, inspect the axles, flange wheels and safety nuts, check for loose parts, look for cracks or deformities.
  • Clean your grinder’s vents frequently, try to get dust or other material inside the housing,
  • Make sure it is disconnected from the power outlet.
  • Remove the disc or any other accessory assembled to the grinder.
  • Remove the screws

How to Change Grinding Carbons ?

It is always better to replace both brushes, even if only one is worn. Worn brushes are often the cause behind a malfunctioning motor. Replacing the brushes can fix a motor that is running intermittently.

The new brushes can restore the electric braking of a motor. Carbon brushes are one of the most commonly replaced power tool parts.

This is because carbon brushes are wear elements, which means that through friction and wear they will gradually wear out until they need to be replaced.

Worn brushes are a common cause of intermittent engine running, reduced electric braking and reduced engine power.

A worn brush will often wear close to the wire and may crack, crack or itch. When replacing carbon brushes, be sure to inspect the armature for burns, cracks, or other damage that may indicate major motor problems.

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