25-08-2017, 09:32 PM
INTRODUCTION
A hacksaw is a fine-tooth saw with a blade under tension in a frame, used for cutting materials
such as metal. Hand-held hacksaws consist of a metal frame with a handle, and pins for attaching a narrow disposable blade. A screw or other mechanism is used to put the thin blade under tension. A power hacksaw (or electric hacksaw) is a type of hacksaw that is powered by electric motor. Most power hacksaws are stationary machines but some portable models do exist. Stationary models usually have a mechanism to lift up the saw blade on the return stroke and some have a coolant pump to prevent the saw blade from overheating The power hacksaw and the bandsaw are two common types material to a desired length or contour. It functions by of sawing machines used to cut metal in the machine shop. drawing a blade containing cutting teeth through the The power hacksaw uses a reciprocating (back and forth) workpiece. The sawing machine is faster and easier than hand cutting action similar to the one used in a hand hacksaw. The sawing and is used principally to produce an accurate square power hacksaw is used for square or angle cutting of stock. or mitered cut on the workpiece. The band saw uses a continuous band blade. A drive wheel and an idler wheel support and drive the blade.