Are Electric Knife Sharpeners Bad For Knives? – Best Answered In 2023

If you’re someone who loves to cook or has a passion for knives, you’ve probably wondered about the impact of electric knife sharpeners on your valuable blades. 

Electric Knife Sharpeners are a controversial topic when it comes to their impact on the longevity and quality of knives. 

While some argue that electric sharpeners can damage the blade and affect its overall performance, others believe that they provide a convenient and efficient sharpening option. 

In this article, we will discuss factors to consider when choosing an electric knife sharpener and also talk pros and cons of electric knife sharpeners. Let’s start now:

Some Factors To Consider When Choosing An Electric Knife Sharpener:

Here are some key factors to consider when choosing an electric knife sharpener:

Sharpening Angle Options:

The sharpening angle options supplied by an electric knife sharpener are an important consideration when purchasing one. 

Some Factors To Consider When Choosing An Electric Knife Sharpener:
Source: foodandwine

The sharpening angle is the angle at which the blade is sharpened, and it has a significant impact on the performance and longevity of your knives. 

Because different knives require different sharpening angles, having a sharpener with a choice of angle settings is essential. 

Delicate knives, such as Japanese or Santoku knives, often require a lower angle of 15-20 degrees, whereas heavier-duty knives, such as Cleavers or hunting knives, may demand a greater angle of 20-30 degrees. 

As a result, it is critical to select an electric sharpener that allows you to alter the angle to meet your unique requirements.

Abrasive Type And Grit Options:

Another factor is the abrasive type and grit options used in the sharpener. Sharpening precision and durability vary depending on the type of abrasive used, such as diamond, ceramic, or tungsten carbide. 

Diamond abrasives are well-known for their ability to Sharpen Blades to a razor’s edge, but ceramic is used for delicate knives that require fine sharpening. 


Furthermore, the grit options given by the electric knife sharpener should be considered. The grit level influences the texture of the abrasive surface and, as a result, the sharpening results. 

Fine grits are ideal for refining and polishing existing sharp knives, whereas coarse grits are ideal for reprofiling broken blades. 

As a result, it is critical to select an electric knife sharpener with a variety of grit settings to accommodate varying blade states and sharpening requirements.

Ease Of Use:

A sharpener that is complicated or difficult to use might cause frustration and even accidents. As a result, models with user-friendly features and functionality must be considered. 

Source: foodandwine

Look for a sharpener with clear instructions and an easy-to-use interface that allows for straightforward navigation and operation. 

Consider options such as automatic angle adjustment or pre-set sharpening angles, which can further ease the sharpening process. 

Another factor to consider is the ease of Cleaning and upkeep. For easy upkeep, choose a sharpener with replaceable components or a built-in cleaning mechanism.

Safety Features:

It is critical to evaluate the safety aspects of any electric appliance or equipment when purchasing one. First and foremost, appropriate grounding should be checked. 

A properly grounded electric device considerably minimizes the risk of electrical shock by providing a conduit for surplus electrical energy to flow into the earth. 

Source: techgearlab

It is also necessary to be aware of the presence of circuit breakers or fuses. In the event of a power surge or short circuit, these serve as a protective mechanism by Cutting off the flow of electricity. 

Overload protection is another crucial safety aspect to consider. When the device consumes an excessive amount of energy, this feature immediately cuts off the power supply, preventing overheating and dangerous fires.  

Furthermore, it is essential to look for appliances with insulated electrical components, protecting users from accidental contact with live parts.


Another significant element to consider is the budget. It is critical to evaluate how much you are willing to spend on this instrument, as prices might vary greatly between models. 

Setting a budget will allow you to narrow down your alternatives and avoid overspending or sacrificing quality. Remember that higher-priced sharpeners typically have more advanced features and durability, allowing for longer use without the need for replacement. 

However, you must strike a balance between your money and the usefulness of the sharpener. Consider reading user reviews or consulting an expert to pick a model that provides good value for money within your specified pricing range.

Can Improper Use Of Electric Sharpeners Affect Blade Thickness And Performance?

Yes, Electric sharpener misuse can have a direct impact on blade thickness and performance. Electric sharpeners work by grinding away the metal on the blade, eventually shaping it to a fine and sharp edge. 

However, when used incorrectly, such as applying too much pressure or holding the blade at an angle that is too steep, the sharpening process can become uneven. 

Can Improper Use Of Electric Sharpeners Affect Blade Thickness And Performance?
Source: quora

This might result in uneven metal removal from the blade, resulting in thickness and form irregularities.

Too-thin blades can become brittle and prone to chipping or breaking, whilst unevenly sharpened blades might result in an imbalanced Cut or diminished cutting ability. 

Furthermore, aggressive or careless use of an electric sharpener may also cause excessive heat buildup, which can temper the blade and affect its hardness.

What Are The Pros And Cons Of Electric Knife Sharpeners Compared To Manual Methods?

Pros of electric knife sharpeners:

  • Quick and easy to use
  • Can sharpen multiple knives at once
  • Offer more consistent results
  • Suitable for both straight and Serrated Blades
  • Reasonable prices

Cons of electric knife sharpeners:

  • Can remove more material from the blade
  • Not all types of knives are suitable
  • Not as precise as sharpening by hand
  • Electric sharpeners can heat up the blade quickly, which can damage the temper of the steel

Pros of Manual Knife Sharpeners:

  • Able to sharpen almost any type of knife
  • The user maintains complete control of the sharpening process
  • Manual sharpening methods allow for a gentle and slow sharpening of the blade

Cons of Manual Knife Sharpeners: 

  • Skill and practice required
  • Time-consuming
  • Inconsistent results
  • Learning curve
  • Potentially dangerous if not done correctly


Q: Can electric knife sharpeners remove too much material from the knife blade?

Yes, using an electric sharpener aggressively or incorrectly can result in excessive material removal, which can damage the knife’s longevity and function. It’s critical to follow the manufacturer’s directions and keep the sharpening process in mind.

Q: Do electric sharpeners generate heat that can harm the knife blade?

During the sharpening process, some electric sharpeners generate heat, which might potentially affect the tempering and quality of the blade. It is best to select a sharpener with characteristics that reduce heat generation.

Q: Can electric sharpeners be used on all types of knives?

Electric sharpeners are often appropriate for sharpening classic blade shapes. Knives with non-standard or complex blade forms, on the other hand, may not be compatible with some electric sharpeners. Before using an electric sharpener, be sure it’s compatible.

Q: Are there alternative methods of knife sharpening that are less damaging?

Yes, manual sharpening procedures such as sharpening stones or honing rods provide more control and, when used appropriately, can be less destructive. These techniques necessitate more expertise and experience, but they provide greater adaptability and precision.


In conclusion, while there are arguments on both sides, it is safe to claim that when used correctly and responsibly, electric knife sharpeners are not inherently harmful to blades. 

These sharpeners can efficiently restore a knife’s sharpness and extend its lifespan with correct usage, frequent maintenance, and attention to manufacturer directions. 

To avoid injuring the blade, it is critical to use a high-quality electric sharpener and to use caution. Manual sharpening procedures may also be favored by those who are passionate about culinary arts and precision. 

Finally, the choice between electric and manual sharpeners should be based on personal tastes, knowledge, and each individual’s special needs.

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