Sawing Basics
The definition of a saw is a tool to cut materials of all shapes and lengths. Saws have teeth either on one side of a metal strip or a metal disk. The teeth are set in the tool to alternate sides so the groove cut by the saw will be wider than the thickness. Then, the blade can move in the groove without being restricted or binded. The teeth are either made out of an abrasive or serrated blade.
Circular saws are always machine powered while thin-stripped saws are either used by hand or machine operated. A saw actually can be used with water, steam, or electricity.
There are many types of saws. A Gang Saw for example, makes simultaneous cuts with parallel blades. A Buzz Saw has a spindle that rotates and the cutting teeth are a steel disk. A Fret Saw is used for cutting curved outlines, has a narrow blade, and is fine toothed or the teeth are very close together. A Reciprocating Saw is used with a wide assortment of blades depending on the cut and what application is being used. The blade is reciprocating and normally has a plate that flows with the surface when it is being cut.
There are actual standards that are set on making saws. The American National Standard or ANS
regulates the blades safety and the saw’s use. For example, a hacksaw blade must be set to wavy if the teeth are set at 24-32 teeth per inch. A raker set is a requirement where every other third tooth is unset. The metal in the saw is also regulated. If the saw is steel, it can’t be more than 1.25 Alloy. High power and industrial saw blades must be able to hold a temperature of 1,000 degrees Fahrenheit if a steel blade is used for high speed machining processes.
There are steps into making a saw blade. It all is based on the type of saw and its usage. Saw blades are usually made out of Tungsten and a special type of steel, and then it is rolled into strips. How thick the strip is determines the thickness of the blade. The gauging is the same instrument that is used to measure wire.
Then, using stamping machines, the blades are stamped out of the steel. Depending on what saw is used; this is how the blade will then be processed. Different techniques are used to form the blade. There can be a thin blade, a curved blade, and so on. To make the teeth is very important in making the saw do its job properly. A gauge is used to measure the teeth; it is made from plated steel. It gauges three teeth at a time, and then the teeth are bent and cut in directions that are alternating. If the teeth are angled too much, then the saw will be off or not cut properly.
Once this is all done, the hardening process will come next. It can be done with old time classic techniques, which includes hammering the blade for flexibility and stiffness to hardening throughout for machining processes. Rust protection is sprayed on and then the blades are put on the handles of the saws, which nowadays are injection molded.