How Many Teeth Per Inch on a Hacksaw Blade?
Hacksaw blades are distinguished by the pitch (frequency) of their teeth. These can vary from three relatively large teeth per inch (TPI) through to 32 TPI, ideal for very fine cutting. As a general rule, the larger the blade, the lower the number of teeth per inch.
How Thick is a Hacksaw Blade?
A standard 12-inch (300mm) hacksaw blade will typically be 0.63mm thick.
How Do You Cut Aluminium with a Hacksaw?
Although it is relatively soft, aluminium can be a difficult metal to cut because the shavings tend to accumulate and stick to the blade. Therefore, to achieve an effective cut, it is advisable to choose larger blades with lower TPI. You can also apply oil or lubricant for a smoother cut.
What are Hacksaw Blades Made from?
Hacksaw blades are typically made from high-speed steel (HSS), a tough, abrasion-resistant variety of steel. HSS is widely used to make tools, cutting blades and drill bits thanks to its strength, accuracy, and resistance to warpage and breakage.
Why are Hacksaw Blades Made with Different-Sized Teeth?
Different-sized teeth provide varying levels of cutting power. Large blades with fewer teeth are better suited to tough materials, while smaller blades with a greater number of teeth are designed for finer work.
Who Invented the Hacksaw and When?
Various types of saws have been used to cut materials for centuries, but the modern hacksaw owes a great deal to Max Flower-Nash Clemson. He conducted a series of experiments in the 1880s looking at ways to increase the efficiency of saw blades via heat treatments and by changing the size and number of embedded teeth. He was eventually granted an official patent for his improvements.
Does a Hacksaw Cut on the Push or the Pull?
Hacksaw blades should be mounted in their frames with the teeth facing forwards. They are designed so that the blade will cut on the push – the forward stroke – rather than the pull, or backwards stroke. The correct orientation for mounting will sometimes be indicated by an arrow marked on the blade.