Electric sharpener - a reliable assistant for the home craftsman

Sanding sizes

Emery cloths intended for household use are relatively small in size and weigh up to 14 kg. For industrial use, larger machines are used, the weight of which reaches 100 kg by average standards.

The dimensions of such devices directly depend on the size of the electric motors and what maximum permissible disk diameter is permissible for working with a particular machine.

If the dimensions of the machines do not have some common standard, the same cannot be said about the working elements. Since their replacement occurs much more often than replacing the entire machine, therefore, there is no reason to manufacture any unique molds.

Spindle speed

The speed of operation directly depends on how many revolutions per minute the spindle makes.

The speed of conventional models reaches three thousand revolutions per minute, provided that there is no contact with any surface.

For some machines, an additional disc is specially installed to allow wet sharpening.

• The lower part of such a circle must be lowered into a container of water.
• The speed of work is noticeably reduced.
• The maximum number of revolutions is less than 150.

Tips and recommendations when choosing sharpening bits for drills from Aliexpress

Types of devices

Before opening and studying the catalog, you should know what a machine for sharpening a drill is and what its parameters require special attention. Usually this is a stand with a support into which the drill is clamped. Nearby is an abrasive wheel, which, when turned on, rotates and comes into contact with the drill, sharpening it at different angles.

Depending on the scope of application, such devices are divided into two types, as shown in the table:

Strictly speaking, you don’t need such a device at home at all; drills can be sharpened yourself by using an abrasive attachment and securing them in a holder. But this method is almost never used - the quality of sharpening suffers, and it is also impossible to restore the working qualities of high-strength drills. Therefore, it is better to delegate this procedure to a machine.

Video - Tool for sharpening drills from AliExpress

How to choose

When purchasing a car, you should rely on:

• type of grinding disc. It can be made of an alloy (steel and tungsten) or stone (diamond, corundum). It’s better not to take corundum ones - they wear out faster and still won’t return the original sharpness, especially for a high-strength drill;
• sharpening angle;
• drill size;
• the ability to replace the sanding attachment - not all machines have it;
• brand. The machine does not necessarily have to have a “big” name, but self-respecting manufacturers usually talk about themselves on the general information page and even post photos from production. You should not buy models where neither the brand nor the certification is known.

You should definitely take into account another factor that is invariably present when purchasing any equipment from Aliexpress - the instructions are in Russian. Not all models have it, and few Russians can understand the manual in Chinese. If there is no Russified version, most often there is at least one in English.

Video - How to sharpen a drill correctly

Which sharpening machine is better to buy?

Considering that modern equipment is becoming more and more functional, choosing even such a simple tool as an “emery board” can raise many questions. For inexperienced craftsmen, the task sometimes becomes insurmountable. After reading our ranking of the best universal machines of 2022, it is easy to understand the differences, pros and cons of various models.

Key criteria for choosing the best machine will help you determine which one is best to purchase:

1. The relationship between power and grinding wheel diameter. The most productive units are those with increased power and a smaller grinding disc diameter.
2. The presence of additional options, such as lighting, a cooling container, a guide groove for drills, and various removable modules that expand the possibilities of use. Multifunctional modifications are also easy to operate and can replace two or three types of equipment at once.
3. The larger the size of the parts being sharpened/processed, the greater the engine power must be. For large volumes of work, the time of continuous use is also important.
4. For precision work, the best choice is machines with the lowest number of revolutions. Also, this factor reduces the friction force and will allow you to process soft and delicate materials that are prone to deformation from exposure to high temperatures.

Criterias of choice

Comparison table of characteristics

The main characteristics of the models from the rating can be compared in the table.

Useful tips

When choosing a chain sharpener, you should pay attention to the spindle rotation speed, which determines the speed and quality of processing. It would not be amiss to take into account additional functions, for example, head mobility.

An important parameter of the unit for drills is the maximum diameter of the parts being sharpened. For household devices it reaches 2-13 mm, and for professional models it reaches more than 20 mm. A necessary function will also be speed adjustment, which allows you to optimize the process of straightening drills of different sizes.

To perform operations with tools, the size of the sharpening stones is important. For example, drills and knives are renewed with a circle 20 mm thick. It is also worth noting the power and speed of such machines. As these indicators increase, the accuracy of the actions performed also increases.

Before you start choosing a specific model of electric sharpener, you should decide on the purpose of the device. Next, the dimensions of the unit are taken into account, affecting the convenience of its storage and mobility, as well as the power, which determines the duration of operation and energy consumption.

Voting for the best sharpener for drills from Aliexpress

Which sharpening for drills on Aliexpress would you choose or recommend?

Universal knife sharpener, drill bits YESOK TX-R8

5.88% ( 1 )

Universal knife sharpener, grinding wheel YESOK GD-380

0.00% ( 0 )

High precision grinding machine YESOK ZT-02A

0.00% ( 0 )

Grinding machine for U3vv drills

5.88% ( 1 )

Drill sharpener Proxxon 21200 BSG

0.00% ( 0 )

Sharpener LZHZXY MR-13A

5.88% ( 1 )

CHUJIN 180W Portable Drill Grinder

0.00% ( 0 )

Drill sharpener LZHZXY Z13, disc sharpening device, 3-13 mm

11.76% ( 2 )

YunlinLi HY-13 Portable Drill Grinder

17.65% ( 3 )

Electric grinding machine DOERSUPP SKUG50936

0.00% ( 0 )

Sharpening machine GD-313

0.00% ( 0 )

Machine for sharpening drills, knives, scissors PIT PMTS1003-C

17.65% ( 3 )

Electric drill sharpener PROSTORMER, 3-12 mm

11.76% ( 2 )

Multifunctional sharpener Milda 96 W

5.88% ( 1 )

Multifunctional sharpener Urijk M146325

5.88% ( 1 )

Portable drill grinder

0.00% ( 0 )