What is a grinder? Types of grinding machines and their uses

Grinding machine is an important tool in mechanical, wood, stone and metal processing factories, bringing more convenience in daily work as well as production. Join Tnhelearning.edu.vn to find out what a grinder is, the types of grinders and common uses of grinders!

What is a grinder? Construction of grinding machine

What is a grinder?

A grinder is a tool used in the processing and processing of wood, stone and metal surfaces, to help grind details, smooth welds, and sharp edges in many different positions and can be visible in tight corners thanks to its compact design.

In addition, the grinder can incorporate accessories for almost the same use as a hand cutter or a sander.

Structure of grinding machine

The grinder is composed of many different parts, with each part having its own function and effect. Here are some basic parts of a grinder that you should know:

• Power button: An integral part of the grinder. Currently on the market there are two types of power buttons: push-button and push- to-start.
• Brush : This small part is located on the outside of the motor and helps the tissue work more efficiently. After a period or a long time of not using, it is advisable to check the brushes again because when worn will cause the grinder to stop working. To replace a new brush for a hand grinder, you just need to remove the two screws on either side of the body, install a new brush and re-screw the old screw.
• Protective rim: Has the function of protecting the user from debris as well as dust splashing out immediately when grinding. This guard guard is rotatable for easier and safer use of the grinder.
• Other parts: Jaw wrench for fixing has the function of fixing the grinding direction. Each angle grinder has a shaft lock button that allows attachments such as sharpening stones, cutting stones or blades to be securely locked after being attached to the machine. Grinding stones are made mainly with steel or concrete with 2 main styles: glossy and smooth.

Note: It is absolutely not recommended to use a hand grinder without a protective guard, although the guard is removed when it is removed, it will be more convenient to observe.

Uses of grinders

The machine is designed with many uses, supporting the processing and repairing of materials and user tools such as:

Polishing metal surfaces: When adding an iron brush accessory to an angle grinder, this is a specialized accessory that helps quickly clean and smooth away rust or peeling paint on product surfaces. metal. Besides, using the iron brush attachment also helps to scrub the ball in crevices and sharp corners effectively.

Rebar cutting: The grinder is equipped with a cutting stone accessory to quickly and decisively cut hard objects such as rebar, angle iron, rusty bolts, barbed wire fences, …

Cutting brick, stone and concrete: When the angle grinder is equipped with a diamond cutter, it is very easy to dig and cut ceramic, stone, and brick materials to create suitable holes for pipe installation. drainage or to remove obstructions during construction.

Sharpen metal tools: When fitted with a sharpening stone accessory, the angle grinder will become a great tool for sharpening the blades and edges of tools such as hoes, shovels, rakes, .. After a long time of use, you should use a grinder to sharpen the ax blade or lawn mower blade before use.

Remove old grout: With a hand-held grinder fitted with a thick diamond cutter, it will be a specialized tool for removing grout, using a grinder not only makes removing old grouts more convenient, but also helps avoid damage the bricks.

Wood cutting and grinding: The grinder not only cuts and grinds metal and stone materials, but it can also cut and grind wood. You only need to perform a simple operation by changing the blade to easily use the machine to cut and gouge.

How many types of grinders are there?

Depending on the function and specific application, grinding machines are classified into different types. Some popular grinders today are angle grinders, straight grinders, and 2-stone grinders.

Angle grinder

The hand-held angle grinder has a compact handheld design, usually comes with an auxiliary handle to help users work accurately, the main function is to grind on a variety of materials such as metal, stone, wood.

There are two main lines of angle grinders, small and large angle grinders . Small angle grinders are designed with grinding discs with a diameter of 100 – 110mm , large angle grinders usually have a diameter of 160 – 180mm .

Advantage

• Angle grinder can be used to polish metal surfaces, clean floor tiles.
• Angle grinding, metal cutting, stone cutting easily and efficiently.
• The hand-held angle grinder is lightweight, easy to work in tight corners.
• Powerful operation, low noise and vibration.

Defect

• There are some types of angle grinders that use batteries, so the grinding performance is not high, costs more to replace batteries and the grinding speed is slower than conventional angle grinders.

Mold grinding machine

Mold grinding machine is a line of grinding machines designed with a more compact size than angle grinders, usually using a maximum clamp of 6 – 8 mm , can change many different types of mold heads such as: rectangular or triangular cylinders, round cylinders, etc. to match each angle and detail to be processed.

Advantage

• Used for grinding small details such as edges, in the hole die, especially in hard-to-reach places that a conventional grinder cannot do.
• The machine can be used with one hand for convenience.
• Compact construction makes it easy to operate for continuous periods of time without causing hand fatigue.

Defect

• It is not recommended to use a die grinder to smooth flat surfaces because the grinding tip of the mold is too small compared to the access area, the work results are not as desired and it is very time consuming.

Two stone grinders

The two-stone grinder is a bench-top grinder, designed with two grinding wheels (fine grinding stone and coarse grinding stone) that operate by electric tissue for grinding tools and materials made of hard metals such as iron and steel. , aluminum,…

Advantage

• Powerful operation with high capacity, large no-load speed.
• Good resistance to high temperature and corrosion during use.
• Increase productivity as well as work efficiency against hard-to-impact materials such as stone, iron, steel, …

Defect

• During the grinding process, there will be a lot of dust causing inconvenience to the user during the working process.
• Users must be fully equipped with the necessary knowledge before starting to work to ensure the safety of the users themselves.

Comparison table of design, use, and price range of angle grinders, die grinders, two-stone grinders:

Machine type	Angle grinder	Mold grinding machine	Two stone grinders
Design	The length is about 50mm – 60mm back, the drive body rotates the circular grinding disc, and the machine head is about 100mm – 230mm in size.	Vertical cylinder, can be handled with one hand, the grinding die on the machine head has shapes such as: rectangular cylinder, triangular cylinder, round cylinder, …	Designed with two grinding stones, the tripod is made of rubber material to reduce vibration when operating.
Uses	Polish, cut, sharpen metal tools powerful and fast.	Polishing flat parts, inside and outside of tubes, polishing hard-to-reach corners, etc. grinding molds, holes, or small details.	Grinding, cutting, cleaning, polishing or roughing, mining and construction of natural stones.
Price range	About 0.5 – 7 million	About 2.5 – 6 million	About 0.5 – 1.5 million

(The price list was updated on September 4, 2022)

Refer to reputable grinder brands

The firm	Trademark	Outstanding Features	Price range
Tolsen	China	Compact design, easy to move and store. Anti-slip handle with convenient auxiliary handle. The ability to work optimally with large capacity and rotational speed. Supports fast material cutting and effective angle grinding. Stable operation with powerful motor.	About 0.8 – 2.5 million
Makita	Japan	Strong durability and can limit impact, abrasion, easy to use. The machine is made of alloy and plastic shell, so it is quite sturdy. The handle is elongated, fitted with an anti-slip system and has safe electrical insulation. Sharp grinding disc, high speed operation, controlled by switch, auxiliary handle, guard ring. Makita owns many different versions, with capacities ranging from 710 – 2400W , meeting popular needs.	About 1 – 6 million
Ryobi	Japan	The machine possesses a solid design, easy to perform simple operations. Possessing large capacity with no-load speed up to 2850 rpm increases working productivity. Ability to process and shape wood, stone, metal surfaces, support grinding details, perfect welds. The machine comes with 2 coarse and fine grinding discs so you can grind on any surface.	About 1-2 million
Dewalt	America	Possessing a strong and sturdy design with a variety of product segments. The handle is designed to fit comfortably and firmly, with high roughness. The machine is often used in industry, building material production workshops, construction works,… The design of a disc shield helps to protect and limit grinding dust and sparks during construction. Equipped with additional handle accessories to help the machine operate stably and control more easily.	About 0.8 – 4 million
Kyocera	Japan	Solidly designed, minimalist, the overall look of the middle pillar is extremely solid. Owning the popular brush motor on the market today. Diversified machine capacity, maximum no-load speed of 2850 rpm , helping to increase work productivity. The grinding machine can process and shape wood, stone, metal surfaces, support grinding details, finishing welds. Around the 2 grinding discs are equipped with shields against small objects that are thrown out during work.	About 1-2 million
Bosch	Virtue	The machine integrates many modern features with many different utilities. Sharp grinding disc, has a large rotation speed, the performance of operations is smoother. The machine can use batteries, supports a maximum no-load speed of up to 11000 rpm . The auxiliary handle makes the grinding operation flexible and easy to move. Can grind, smooth, polish and cut a number of materials.	About 1 – 7 million
Stanley	America	The design of the machine is extremely compact and easy to operate. The machine’s power is up to 2200W , grinding speed is up to 11000 rpm . M14 grinding wheel shaft thread should be able to mount a variety of grinding discs. The button switch is located at the back of the machine, convenient to use.	About 0.5 – 2 million

Prices were updated on 11/20/2022 and are subject to change from time to time.

Warranty policy at Tnhelearning.edu.vn

Grinding machines are currently being sold officially at Tnhelearning.edu.vn supermarket systems nationwide, you can buy directly at the store or buy online through 2 channels:

• Website: www.dienmayxanh.com/may-mai
• Purchase call center: 1800.1061 (Toll free) from 7:30 to 22:00 (both Sundays and public holidays)

(Warranty policy was updated in September 2022 and may change from time to time. See more updated information here)

Above is the information about the grinder that Tnhelearning.edu.vn shares with you. Hopefully the article will help you better understand the grinder and be able to choose the most suitable grinder. If you have any questions, leave them in the comments section below!