Types of Hacksaw Frames
The hand hacksaw is used along with a blade to cut metals of different sections.it is also used to cut slots and contours. The two types of hacksaw frames are solid frames and adjustable frame. Solid Frame:Only particular standard lengths of blade can be fitted to this frame. Adjustable frame:Different standard lengths of blades can be fitted to this frame. Adjustable frame (tubular type) most commonly used type. It gives a better grip and control,whlle sawing. For proper working, it is necessary to have frames of rigid construction. HACKSAW BLADES:hacksaw blade is a thin narrow steel band with teeth, and two pin holes at the ends. It is used along with a hacksaw frame. The blade is made of either low alloy steel or high speed steel and is available in standard lengths of 250mm and 300mm. two tyeps of hacksaw blades are available in market-all hard blades and flexible blades. All hard blades: These are hardened to the full length between the pin holes.Flexible blades:these types of blades, only the teeth are hardened because of their flexibility, these blades are useful for cutting along curved lines. The distance between adjacent teeth is known as the pitch of the blade. Hacksaw blades are designated according to their length, pitch and type. Tp prevent the saw blade binding when penetrating into the material, and to allow free movement of the blade. The cut is to be broader than the thickness of the saw blade. This is achieved by the setting of the saw teeth. There are two types of saw settings. Alternate teeth or groups of teeth are staggered. This arrangement helps for free cutting, and provides for good chip clearance. Wave set is teeth of the blades are arranged in a wave form.for the best result, the blade with the right pitch should be selected and fitted correctly.
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