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Q：What are the common specifications of utility knife blades？
A：The standard specifications for utility knife blades include 9mm, 12.5mm, 18mm, and 25mm. The dimensions vary, with common sizes as follows:
· Small (S, A): Blade width is 9mm, thickness is 0.38mm.
· Medium (M): Blade width is 12.5mm, thickness is 0.45mm.
· Large (L): Blade width is 18mm, thickness is 0.5mm.
· Extra Large (H): Blade width is 25mm, thickness is 0.7mm.
Q：What are the commonly used materials for utility knife blades?
A：The common materials for utility knife blades include high carbon steel, alloy steel, ceramic, and carbon tool steel.
· High Carbon Steel: This material has high hardness, excellent wear resistance, and strong corrosion resistance, making it less prone to rust and extending its lifespan. Blades made from high carbon steel are very sharp and provide smooth cutting. However, they can feel heavy and may lead to fatigue with prolonged use. In China, utility knives typically use 60# steel, classified as high carbon steel with a carbon content of about 0.6%. Generally, the higher the carbon content, the greater the hardness achieved through heat treatment, especially when finely sharpened.
· Alloy Steel: This material features high hardness and strength, with good wear and corrosion resistance, suitable for cutting various materials. Alloy steel blades also possess high hardness and are less likely to deform or break, making them convenient for use.
· Ceramic: Ceramic blades have high hardness, sharpness, and durability, and they are resistant to rust, making them suitable for cutting multiple materials. However, the drawback of ceramic utility knives is their brittleness, which makes them prone to chipping or breaking.
· Carbon Tool Steel: This material offers high hardness, red hardness, excellent wear resistance, and appropriate toughness. Blades made from carbon tool steel maintain high hardness and wear resistance while also meeting strength and toughness requirements, making them a preferred choice for office use.
Each material has its own characteristics, and users can choose the appropriate utility knife based on specific needs and preferences. For frequent cutting of various materials, high carbon or alloy steel with high hardness and wear resistance is advisable. For safety concerns, ceramic materials that are rust-resistant and have a high safety factor are ideal. If toughness and strength are a priority, carbon tool steel is the best choice.
Q：What are the common sizes and specifications of utility knives?
A：The common sizes and specifications for utility knives include 9mm, 18mm, 22mm, and 25mm. These sizes cater to different usage needs, with 9mm and 18mm being the most commonly used. The specifications not only refer to the blade length but also include blade thickness, which typically ranges from 0.4mm, 0.5mm, to 0.6mm.
Additionally, utility knives come in various materials and designs, including high carbon steel, alloy steel, and ceramic, as well as foldable and retractable designs to meet different user preferences. For example, premium utility knives usually feature blade lengths of 18cm and 9cm, with thickness options of 0.4mm, 0.5mm, and 0.6mm. These size and specification options are designed to provide better cutting efficiency and safety while considering portability and durability.
Q：What are the commonly used materials for utility knives?
A：The common materials used for utility knives mainly include high-carbon steel, alloy steel, ceramics, alloys, ABS plastic, resin, and others.
High-carbon steel utility knives have blades with high hardness, good wear resistance, strong corrosion resistance, and are not easily prone to rust, offering a long service life. However, they feel heavier in hand, and prolonged use can lead to fatigue.
Alloy steel utility knives also feature blades with high hardness and wear resistance, and they are not easily deformed or broken, making them convenient to use.
Ceramic utility knives use ceramic blades that are highly durable, sharp, and resistant to rust, making them suitable for cutting various materials. The downside is that ceramic blades are more brittle and can break more easily.
Alloy utility knives have knife bodies made of alloy, which provides a good texture and a heavier feel, reducing the chances of slipping during use.
Plastic utility knives have plastic bodies, making them lightweight and portable. However, the downside is that plastic bodies are more prone to damage and have a shorter lifespan.
Resin utility knives have bodies made of resin, providing a smooth feel, ease of portability, and safety with anti-slip features. They are suitable for light-duty tasks such as opening packages.
The choice of material for a utility knife depends on the user’s needs and preferences. High-carbon steel and alloy steel utility knives are suitable for applications requiring high hardness and wear resistance, while ceramic utility knives are ideal for specific situations demanding extreme durability. Plastic and resin utility knives are lighter and more suitable for daily carrying and casual use.
Q：What are the commonly used materials for tape measures?
A：The common materials used for utility knives mainly include high-carbon steel, alloy steel, ceramics, alloys, ABS plastic, resin, and others.
High-carbon steel utility knives have blades with high hardness, good wear resistance, strong corrosion resistance, and are not easily prone to rust, offering a long service life. However, they feel heavier in hand, and prolonged use can lead to fatigue.
Alloy steel utility knives also feature blades with high hardness and wear resistance, and they are not easily deformed or broken, making them convenient to use.
Ceramic utility knives use ceramic blades that are highly durable, sharp, and resistant to rust, making them suitable for cutting various materials. The downside is that ceramic blades are more brittle and can break more easily.
Alloy utility knives have knife bodies made of alloy, which provides a good texture and a heavier feel, reducing the chances of slipping during use.
Plastic utility knives have plastic bodies, making them lightweight and portable. However, the downside is that plastic bodies are more prone to damage and have a shorter lifespan.
Resin utility knives have bodies made of resin, providing a smooth feel, ease of portability, and safety with anti-slip features. They are suitable for light-duty tasks such as opening packages.
The choice of material for a utility knife depends on the user’s needs and preferences. High-carbon steel and alloy steel utility knives are suitable for applications requiring high hardness and wear resistance, while ceramic utility knives are ideal for specific situations demanding extreme durability. Plastic and resin utility knives are lighter and more suitable for daily carrying and casual use.
Q：What are the commonly used sizes of tape measures?
A：Common sizes for measuring tapes include, but are not limited to, 1 meter, 1.5 meters, 2 meters, 3 meters, 3.5 meters, 5 meters, 7.5 meters, 10 meters, 20 meters, 30 meters, 50 meters, and 100 meters. These sizes cater to various needs, ranging from household use to professional measurement tasks.
Measuring tapes are typically made from materials such as PVC plastic and fiberglass. The addition of fiberglass prevents the tape from stretching during use, ensuring measurement accuracy. Most measuring tapes have dual scales—one side marked in centimeters and the other in inches or local units, like the Chinese “cun,” to accommodate different regions’ measurement systems. For instance, one side may display 150 centimeters, while the other shows 60 inches, making the tape more practical and convenient.
In addition to the common types, there are special variants like steel measuring tapes and cloth measuring tapes (fiberglass), which differ in material and use but follow similar size standards to meet diverse measurement needs.
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