Electric sharpener - a reliable assistant for the home craftsman

Comparison table of characteristics

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

Machine for sharpening cutters for metal, restoring hole saws for wood

Milling attachments can have a wide variety of shapes: cylinder, cone, hemisphere, etc. There are many standard sizes of this cutting tool. That is why sharpening is quite difficult, especially for non-professionals. In order for the result to be positive, that is, the cutter has restored its functionality after processing, it is worth using a machine for sharpening cutters for metal.

Sharpening cutters is quite a difficult process for a beginner.

The difficulty of restoring the cutting surface of these attachments is due to two features:

• sufficiently long;
• curvilinear geometry of the teeth.

Regarding the last characteristic, a distinction is made between cutters with pointed and backed teeth. The first ones have a flat back surface, and it is along this that sharpening is carried out. Backed teeth are typical for shaped cutters. The complexity of the selections they make affects the sharpening method: it is performed on the inner surfaces of the teeth. It is not recommended to use various devices for sharpening cutters for metal.

If we are talking about ring attachments for wood, then it is worth saying that you can use a thin diamond whetstone as a homemade sharpening machine. It is attached to the edge of the table, and the cutter is driven along its surface. Here it is important to take into account the degree of tool wear in order to correctly select the grain size of the surface of the bar and carry out effective processing.

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.

What to look for when choosing

When choosing a sharpening machine, you should pay attention to the following criteria, regardless of its purpose.

Engine power.

Even a small machine must have a motor power of at least 100 W. For machines intended for personal use, the optimal power should vary from 150 to 500 W, and for production models from 500 to 1500 W.

Cooling system.

Most often, machines are equipped with a forced air cooling system. It consists of blades located on the main shaft of the electric motor. When choosing a machine model, you should pay attention to their presence, as it protects the engine from overheating during prolonged operation.

Safety.

A criterion that should not be neglected. Firstly, you should pay attention to the presence of a screen (protective glass) that protects from sparks flying during operation. The presence of stops for sharpened parts will protect and facilitate the work process (there is no need to keep the part suspended).

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.

Which electric sharpener should you choose?

Despite the fact that a master with extensive experience will be able to sharpen any product using simple sandpaper, it is simply impossible to do without a special tool.

First, when choosing a sharpening machine, you need to decide and understand for what purpose it is needed. If you need to sharpen various types of objects at home from time to time (kitchen utensils, garden tools), then you should pay attention to a universal machine of low power and dimensions.

To sharpen more professional tools (for example, hairdressing scissors, engraving cutters), a more professional machine will be required. If the machine is chosen for constant long hours of work, attention should be paid to the equipped cooling system (overheating of the sharpening machine is very dangerous).

Another question that is worth asking at the stage of choosing a machine is the possibility of purchasing individual spare parts in the future.

Top 2. Prostormer PTET1058

Rating (2021): 4.85

574 reviews taken into account from resources: AliExpress

The most popular This electric drill sharpener already has 1250 orders and almost 600 reviews on AliExpress. In them, site users praise the device and recommend it for purchase.

• Characteristics

  Average price: 1912 rub.

• Power: 95 W
• Noise level: 64–75 dB
• Rotation speed: 1600 rpm
• Grinding disc diameter: 75mm
• Suitable for drill bits: 3-12mm

A stationary household sharpener, the main advantage of which is its low price with a good level of quality. PTET1058 does not require any additional accessories; you just need to connect the device to a power outlet and it will be ready for use. The device is suitable for processing most drills due to the increased diameter of the grinding disc. The main complaint from users is the complexity of the sharpening process. The set with the sharpener itself includes instructions in English, and video tutorials are also posted on the Internet, but figuring out how to properly control the sharpening angle of the drill is not so easy. Those who managed to master the intricacies of the process speak very positively about the device.

Advantages and disadvantages

• Fast connection without additional devices
• Large diameter grinding disc
• Operational sharpening
• Durable material and quality build

• Complex control and sharpening angle control
• Not suitable for the smallest drills

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See also:

• 20 best knife sharpeners from AliExpress