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What is Insulated Knife?

 

An insulated knife is a type of cutting tool that is designed with insulating properties to provide electrical safety during certain applications. It is specifically used in situations where there is a risk of coming into contact with live electrical components or conducting materials while performing cutting tasks. The primary purpose of an insulated knife is to protect the user from electric shock or injury by minimizing the transfer of electrical current through the tool. It is commonly used by electricians, technicians, and professionals working in the electrical industry, as well as in various other applications where electrical safety is paramount.

 

Advantages of Insulated Knife

● Safety: Insulated knifes are designed to protect the user from electrical shock, which is especially important when working with electrical wiring or other live electrical components.
● Precision: Insulated knifes have a sharp, pointed tip that allows for precise cutting and coring of insulation materials.
● Efficiency: Insulated knifes are designed to make cutting through insulation materials quick and easy, which can save time and effort when working on a project.
● Versatility: Insulated knifes can be used for a variety of tasks, such as cutting through insulation around electrical wiring, plumbing, and heating and cooling ducts.
● Durability: Insulated knifes are made with high-quality materials that are built to last and can withstand the rigors of regular use.

Sickle Shaped VDE Insulated Cable Knife with Guide Shoe
Types of Insulated Knifes

 

Classification by Shape
Fixed Blade Type: The fixed blade type stores the blade in a sheath. After removing it from the sheath, you can put it to work right away. If you use an insulated knife frequently, the fixed blade type is more suitable. In addition, the blade and grip are completely fixed in the fixed blade type, so the blade does not wobble when working.
Folding Type: In the folding type, the blade is folded into the grip section for storage. It is compact and portable. Folding type also has replaceable blades, which are more economical.

 

Classification by Blade Material
Stainless Steel Blade: Stainless steel blades are hard, durable, and rust-resistant. If you use it infrequently, a stainless steel blade is suitable for you because it requires no maintenance. Stainless steel blades are difficult to sharpen, so you will need to replace or repurchase blades when they lose their sharpness.
Steel Blade: Unlike stainless steel, steel blades, which are made of iron mixed with carbon, rust easily. However, because they are easy to sharpen, they are easy to maintain and can be used for a long time if well cared for. They also have a customizability that allows you to make the blade as sharp as you like.

 

Classification by Grip Material
Rubber: Rubber grips are safer because they are non-slip. These grips are easy for anyone to use.
Plastic: Plastic grips are resistant to impact. They are also lightweight, so your arms will not get tired easily.
Wooden: Wooden grips absorb oil and moisture and become more comfortable in the hand as they are used.

 

Classification by Additional Functions
Insulated knifes are simple in construction, but some products have useful additional functions. For example, some knives have holes for splitting and stripping VVF cables, and some have blades for removing burrs.
If you make use of them, you can improve the efficiency of your work. There are also those with a flat blade tip that can be used like a chisel.
Since it is a through-hole type, the end of the grip can be tapped with a hammer. This is useful, for example, when you want to drill a hole in the wall for an outlet.

 
Application of Insulated Knife
 
01/

Cutting Wires And Cables
An insulated knife with a sharp blade allows electricians to cut through electrical wires and cables cleanly and efficiently. This is essential for creating precise wire lengths and ensuring a neat and organized wiring system.

02/

Stripping Wire Insulation
Many insulated knife have a built-in wire stripper feature. Electricians can use this feature to strip the insulation from the ends of wires quickly and accurately, exposing the conductors for proper connections.

03/

Removing Cable Jackets
Insulated knife can be used to slit and remove the outer jackets of cables, revealing the individual wires inside. This is particularly helpful when dealing with multiconductor cables or larger electrical cables.

04/

Trimming Conduit And Tubing
Electricians often work with conduit and tubing to protect and route electrical wires. A insulated knife allows them to trim conduit and tubing to the required lengths easily, ensuring a proper fit for the wires.

Principle of Insulated Knifes

 

 

Compared to a cutter knife, the insulated knife has a thicker blade and a moderately dull cutting edge. If the blade is too sharp when peeling the cable sheath, the blade may go deep into areas that should not be damaged. Deep scratches on the insulation sheath are dangerous because they may lead to electric shock or fire. In addition, if the conductor is deeply scratched, it is more likely to break, which may cause poor contact or wire breakage. Insulated knifes have a moderately dull cutting edge, making it easy to adjust the blade's entry. Also, because the blade is thick, there is no risk of it breaking like a cutter knife even when force is applied.

 
Common Blades for Insulated Knife
 

Coping Blade
A coping blade features a straight spine which comes in handy when you need to create parallel lines. It also features a thin sharp point designed for stripping wires and cutting open electrical boxes.

 

Sheepsfoot Blade
A sheepsfoot knife comes with a straight edge with a bowed spine. The design of this knife makes it safe as it does not have a tip that may pierce. It is typically used to cut the hooves of sheep, but it is also used to carve wood, sharpening a knife and most importantly – It prevents users from accidentally puncturing themselves while doing electrical work (like cutting boxes that contain electrical equipment).

 

Spear Point Blade
A spear point blade is a simple symmetrical design that sports a sharp edge and sharp point. The knife is made with double edges, and it is mainly used for piercing. In some contexts, the knife is referred to as a dagger. There have been different alterations on the design of this knife with some being foldable and some fixed. However, due to the double-edged nature of this knife, it is not easy to carry around each day.

 

Hawkbill/Pruner Blade
As the name suggests, the hawkbill/pruner knife is used for pruning, but besides that, it is used to cut strings, linoleum, roofing paper, and carpets and cutting wires. Generally, the knife is large and curved. Most designs of this knife sport a single blade but others come with an extra blade which is used as a pruning saw.

Tips for Using Insulated Knife

 

Retract Blade into Handle When The insulated knife is Not in Use
Please retract the blade which was in open mode while you were performing your cutting works. insulated knife Blade is sharp enough and that sharp blade may cause an injury when it is the open mode. For that reason, we highly recommend you check your insulated knife blade once you finish your cutting work and retract the blade into the insulated knife handle when it is not in use.

 

Keep Your Body Away From Cutting Line
So many injuries happen when people keep their body and their other hand so close to the cutting line. We highly recommend you to put enough distance between your body and cutting line in order to mitigate all risks that may arise from cut injuries. We also highly recommend you to set the cutting line parallel to your body for your safety.

 

Do Not Talk or Look Away When You Cut Material
It is important to focus on cutting work. It requires all of your attention that is why you should focus on your cutting works and avoid talking and looking away. Thus you can hold control of your cutting work and protect yourself from any accidents.

 

Cut Your Materials on Stable Surface
Please pay attention to placing your cutting materials on a stable surface. Thus you could prevent yourself from any cut caused by any tilting or tipping of the materials. Cutting works that are performed on a stable surface will be much better for your safety and cutting performance of the insulated knife.

 

Use a Glove
It is highly important to wear a cut-resistant glove in order to protect your hands from any cut or nick. Cutting works which are performed by wearing glove will protect your hands in case of an accident. Like other precautions, wearing a glove will also give you a safer cutting experience.

 

Check Condition of insulated knife Blade Regularly
As you cut materials with your insulated knife, its blade edge becomes dull and rusted. Cutting with a dull and rusted blade edge requires much more force to be applied and it will make you exhausted. Applying too much force may also lead to some safety problems such as slippage of insulated knife or damage on cutting material.

 

Do Not Use insulated knife for The Improper Purpose
Using your insulated knife for improper purposes may lead to unwanted accidents. For that reason, we don’t recommend using a insulated knife as a scraper, screwdriver, chisel, or kitchen knife.

 

Use Plier, Glove, and Goggles When Snap-Off insulated knife Blade.
Although the insulated knife is used for different cutting works many people don’t know how to snap off the insulated knife blade or try to break it in unsafe ways. We highly recommend you to use a plier for a safe break before you break off the insulated knife blade. Thus you can grasp the knife more tightly and snap off the blade with less amount of force.

 

Dispose of Dull Blade and Broken Blade Edge in Puncture-Resistant Container.
As we all know that insulated knife blade is sharp and it may cause injuries if we don’t store them carefully. In order not to cause any injury or accident, dull blades and broken blade edges must be disposed of in a puncture-resistant container.

 

Make Sure You Use Right insulated knife for Your Cutting Works
Some cutting works require heavy-duty insulated knife while the others require normal duty insulated knife or precision utility knives. Be sure that you use a proper insulated knife for your cutting work. If you want to know which insulated knife is the best for your cutting work please contact us.

VDE Dismantling Knife for Round Cables

How to Choose the Right Insulated Knife

 

Your Specific Needs
Electricians do not have the same requirements. While some electricians love long and fixed knife models, others prefer foldable and lightweight knife models. The former loves having a heavy-duty knife that does not weigh on their pockets.

 

Blade Style
Knives can be foldable or fixed. Foldable knives are short and thick and can fit in your pocket while fixed knives are thin and long. If you will be using your knife often, a foldable knife comes in handy.

 

Size and Weight
If you wish to carry your insulated knife every day, it needs to be as light as possible and small in size. A knife that weighs between 3 and 5 ounces is ideal for daily use. There are heavier models for electricians who need heavy duty knives. However, when choosing knife size and weight, you have to consider the state regulations since there are state laws regarding the length of blade that can be carried either open or concealed. A knife with a 3-inch blade is an excellent length for daily use.

 

Blade Material
The material used to make the blade determines the hardness, durability and edge retention qualities of a knife. The knife should withstand the wear and tear of everyday use for a good period of time. High carbon steel is excellent at retaining sharpness and sharpens quickly, but it is susceptible to rust and discoloration. Stainless steel is a better version of high carbon steel with the advantage of not rusting or discolouring. Titanium is another common blade material. The material lasts longer than stainless steel, has better edge retention and is generally easy to sharpen. Ceramic is light and tough, but it is more brittle than other materials.

 

Handle Materials
The handle of the insulated knife determines the comfort and ease of use of a knife. A good handle should be durable and offer a rough texture for a firm grip.

 

Safety Features
Folding knives come fitted with safety features such as a locking mechanism. Many have a liner style lock which electricians can rely on. A finger guard will ensure your finger does not slip and get injured. For those who are left-handed, make sure that you have a knife with a double ground spur for your safety.

VDE Cable Knife with Round Head and Protective
Care and Recommendations of Insulated Knife

 

Although the advantages of using a insulated knife are many, it is not recommended to use any kind of knife as the wrong choice increases the likelihood of an accident. Many box cutter knives have thin diagonal lines in the blade, which enables the user to break off portions of the blade when they become dull and blunt. While this is useful in many applications, it is not recommended for electricians, especially when cutting through thick, heavy-duty materials, because the blade can snap and injure the hand or other parts of the body.


Some basic recommendations that most electricians will already know, but are worth repeating, include: Wear industry-standard glasses, gloves and other personal protective equipment (PPE) according to the task to be performed; Make sure knives are stored in a clean, dry place well away from the work area; Visually inspect a knife before each use; and do not use knives with broken, worn or rusted blades as they are at an increased risk of breaking. By ensuring that a tool is always up to the job, electricians can work faster and more comfortably without compromising safety.

 
Our Factory

Maxxtools Co.,Ltd was established in 2005 and concentrates on hand tools and labor supplies. It provides over 1000 different kinds of products to worldwide professionals who demand superior performance and durability on the job.In over 15 years history of supplying high quality product for our client, Maxxtools has gradually become the most reliable supplier of many famous tools importers, whosalers and retailers.

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Ultimate FAQ Guide to Insulated Knife

Q: What are the 7 parts of a insulated knife?

A: A knife consists of several different parts, each with its own name. Here are the main parts of a knife namely the blade, point, edge, spine, tang, handle, bolster, finger guard, heel, and butt.

Q: What are the ways an electrician's knife can be used?

A: The primary use for an electrician knife is cutting wires and cables and stripping off their plastic insulation. It is also frequently used to cut boxes that carry electrical equipment.

Q: What size is an electrician's knife?

A: It has a 45 mm cutting edge, hardened to 57-60 HRC for increased strength. Its blade is made of 2.55 mm thick polished stainless steel. The handle is made of nylon, a light and very resistant material.

Q: What is the purpose of using an insulated knife instead of using an electrician plier?

A: To avoid nicking of wire. In standard practice, rubber tape is commonly used in insulating bare conductor especially outdoor installation.

Q: What are the two types of insulated knifes?

A: There are two types of electrician's knives: fixed-blade and folding. The fixed blade type stores the blade in a sheath. After removing it from the sheath, you can put it to work right away. If you use an electrician's knife frequently, the fixed blade type is more suitable.

Q: Does insulated knife have blades?

A: The Electricians Knife has a heavy-duty, 45mm stainless steel blade that locks into place, preventing the blade closing when in use. The blade features two wire stripping notches and is fitted with an ergonomic hardwood handle and an integral belt clip.

Q: What angle should an insulated knife be cut at?

A: Hold the knife close to your chest at a 30˚ angle (Between 20 and 45 deg) to the wire. Thumb should be on the opposite side of the wire across from the knife.

Q: How do I choose an insulated knife?

A: ✔️ Corded vs cordless: Consider whether you want the knife to be used for kitchen prep or tableside carving. ...
✔️ Blades: Electric knives with 8- to 10-inch blades will prove most versatile for small tasks like slicing cheese and large tasks like carving roasts or bread.

Q: What knife safety precautions should an insulated knife?

A: Safety precautions to keep in mind when using utility knives:
Wear safety glasses to protect your eyes in case a blade breaks.
Always use a sharp blade.
Wear metal mesh gloves to protect your hands.
Hand a utility knife to a co-worker with the handle first.
Consider using self-retracting blades.

Q: How to know if a tool is insulated?

A: Here are a few important guidelines and things to look for when searching for insulated tools. At a minimum, your insulated tools should have the official International 1000-volt rating symbol printed somewhere on the tool. In order to use this marking, tools must actually be tested up to 10,000 volts!

Q: What is the difference between insulated and non insulated tools?

A: Regular screwdrivers and pliers have plastic or nylon handles. These don't protect you against contact with a high voltage electrical line. The difference between these and regular hand tools is that insulated tools provide true electrical isolation on the handle.

Q: How should insulated knives be stored and maintained?

A: Insulated knives should be stored in a clean, dry, and secure location. Regularly inspect the knife for any signs of damage to the insulation or the blade. Follow the manufacturer's recommendations for maintenance and care to ensure the longevity and effectiveness of the insulated knife.

Q: How do you clean insulated knifes?

A: When your insulated knifes need to be cleaned, it is advisable to use mild, non-corrosive cleansers like dishwashing soap or hand-cleaning towels. In order to avoid insulation damage, always store insulated tools away from heat sources.

Q: Why are tools double-insulated?

A: If the housing is made of conductive material, namely some iron or iron-containing compound, then the tools must have a grounding conductor and a 3-prong plug. Double insulation eliminates the risk of electric shock without relying on grounding or a safety extra-low voltage power source.

Q: Who typically uses insulated knives?

A: Insulated knives are commonly used by electricians, technicians, and professionals working in the electrical industry. They are also used in various other applications where electrical safety is crucial.

Q: How can I identify if a knife is insulated?

A: Insulated knives often have markings and certification labels indicating their compliance with safety standards. Look for labels or indicators that specify the knife as insulated or provide voltage ratings to determine its electrical safety capabilities.

Q: Can insulated knives be used on live electrical circuits?

A: Insulated knives are specifically designed to be used on or near live electrical circuits while providing electrical safety. However, it is crucial to follow proper safety procedures, wear appropriate personal protective equipment (PPE), and adhere to electrical safety guidelines when working with live circuits.

Q: Can insulated knives be sharpened?

A: Insulated knives can be sharpened, but it is essential to maintain the integrity of the insulation during the sharpening process. Follow the manufacturer's recommendations for sharpening and be cautious not to damage or compromise the insulation.

Q: Are insulated knives waterproof?

A: Insulated knives may have varying degrees of water resistance, depending on their design and materials. Some models may offer water resistance, but it is important to check the manufacturer's specifications to ensure suitability for specific environments.

Q: Can insulated knives be used in extreme temperatures?

A: Insulated knives are typically designed to withstand a range of temperatures encountered in normal working conditions. However, extreme temperatures beyond the specified range may affect the performance and insulation properties of the knife. Check the manufacturer's guidelines for temperature limitations.

As one of the most professional insulated knife manufacturers and suppliers in China, we're featured by quality products and competitive price. Please rest assured to buy cheap insulated knife for sale here and get pricelist from our factory. Contact us for customized service.

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