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Characteristics
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Blade
A hacksaw blade can be removed from the frame and replaced when the teeth become blunt.
Hacksaw blades have two small holes, one at each end of the blade, which allow it to be held in the frame. |
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Blades come in two lengths:
250 and 300mm (9.8 and 11.8″ approx.)
The most commonly used blade is the 300mm, and so most hacksaws will be built to accept these. However, there are hacksaws with adjustable frames which can accept both 250 and 300mm blades. |
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Cutting stroke
Hacksaws cut on the push stroke, which means the blade should always be placed in the frame with the teeth pointing away from the handle.
For more information, see our section: Push stroke saws vs. pull stroke saws. |
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Finish
Hacksaw blades tend to have small teeth with relatively shallow gullets, so they cut and remove less material with each stroke.
This means cutting with a hacksaw may be a slower process, but a neater finish will be produced. |
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Tooth form
If you turn a hacksaw blade on its side, you will see that the teeth are set in a wavy line.
Manufacturers claim that the teeth are set in this way to help prevent them becoming damaged when cutting through very hard metals like steel. |
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Teeth Per Inch (TPI)
A hacksaw blade will usually have between 14 and 32 teeth per inch.
Generally, blades with 18 teeth per inch or less, will be more suitable for cutting plastic and soft metal.
Blades with 20-32 teeth per inch will be more suitable for cutting steel. |
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Handle
A hacksaw has what’s known as a closed pistol grip handle. This type of handle is usually found on saws with larger or longer blades.
The large handle supports the blade, and because it’s closed, the user’s hand is less likely to slip out when sawing quickly. |
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