Hacksaw blades are thin, narrow strips of metal designed to be mounted on hacksaw frames for cutting a variety of materials, such as metal, plastic, and wood. They are an essential part of the hacksaw tool, providing the cutting edge needed to perform precise and efficient cuts.

Key Features:

1. Material:

   • High-Speed Steel (HSS): These blades are made from a tough, high-speed steel alloy that retains sharpness and resists wear. They are suitable for cutting hard materials like steel and other metals.
   • Bi-Metal: These blades combine two types of metal, usually with a flexible back and a hardened cutting edge. They offer a good balance of toughness and durability, making them versatile for cutting various materials.
   • Carbon Steel: These blades are less expensive and suitable for cutting softer materials like wood and plastic. They are not as durable as HSS or bi-metal blades.
     
     

2. Teeth Per Inch (TPI):

   • TPI indicates the number of teeth in one inch of the blade. The TPI determines the smoothness and speed of the cut.
   • Low TPI (14-18): Fewer teeth per inch, ideal for cutting softer materials or thick sections of metal quickly. The cut is rougher.
   • Medium TPI (24): A general-purpose TPI suitable for cutting a variety of materials, providing a good balance between speed and smoothness.
   • High TPI (32): More teeth per inch, providing finer, smoother cuts. These are best for thin materials and fine work.
     
     

3. Blade Length:

   • Hacksaw blades come in standard lengths, typically ranging from 6 inches to 12 inches. The most common size is 12 inches.
     
     

4. Tooth Set:

   • The arrangement of the teeth on the blade can vary, affecting the cut quality and speed. The teeth may be straight, wavy, or raker set.
     
     

5. Blade Thickness:

   • The thickness of the blade affects its rigidity and the precision of the cut. Thicker blades are more rigid and produce straighter cuts, while thinner blades may be more flexible and suitable for intricate work.

Selection Tips:

• Material Being Cut: Choose the blade material and TPI based on the type and thickness of the material you intend to cut. Harder materials generally require finer teeth and more durable blade materials.
• Cut Quality: For smoother, finer cuts, opt for a higher TPI. For faster, rougher cuts, choose a lower TPI.
• Durability Needs: For frequent use or cutting tough materials, bi-metal or HSS blades are recommended due to their durability and long-lasting sharpness.
  
  

Common Uses:

• Metal Cutting: With the appropriate blade, hacksaws can cut various metals, including steel, aluminum, and brass.
• Plastic and PVC Cutting: Suitable for cutting pipes, sheets, and other plastic materials.
• Wood Cutting: Though less common, hacksaw blades with appropriate TPI can be used for fine wood cutting tasks.
  
  

Proper selection and use of hacksaw blades are essential for achieving the desired cut quality and ensuring the longevity of the blade.