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V. Ryan © 2009
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The hacksaw is used to cut steel and other metals. It
can also be used to cut plastics, although it is not normally used to cut
woods. It is sometimes called an adjustable hacksaw because the length of
the frame can be altered to hold blades of different sizes. Blades are
supplied in two lengths, 250mm and 300mm. If the adjusting screw is
unscrewed, the frame can be pushed into the handle so that the smaller
blades fit the hacksaw.
Blades eventually wear or break and need replacing.
The blade can be replaced by loosening the wing nut adjuster until it comes off the two ‘studs’ that normally hold it in tension in the frame.
A blade should always be positioned with its teeth pointing away from the handle.
|Two types of hacksaw blade are generally available. High Carbon Steel blades are used for general cutting/sawing. They do not last as long a High Speed Steel blades. These are much more expensive but keep their cutting edge for longer and are suitable for cutting hard materials such as stainless steel and alloys.|
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