There are different kinds of scroll saws. The most common design is the parallel arm variety in which a motor is attached near the back of the arms, and the two arms always remain parallel to each other. The C-arm saw has a solid "C" shape and a blade that is mounted between the two ends of the "C". The parallel link scroll saw has rods in the upper and lower arms that are pushed by the motor to move short – about 4 inches (100 millimeters) – articulated arms and the end which hold the blade. Modern scroll saws all maintain a constant tension in the blade.
Scroll saw blades are typically 5 inches long and come in various types. These include:
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