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close this bookWood Harvesting with Hand Tools - An Illustrated Training Manual (ILO, 1989, 128 p.)
close this folderBOW SAWS
View the documentUSE AND TYPES OF BOW SAWS

USE AND TYPES OF BOW SAWS

Bow saws are handy for felling and cross-cutting small trees provided the wood is not too hard.

For professional use, the bow saw should consist of a high-quality oval steel frame holding a thin blade under high tension (1). A protective cover is needed to guard the blade during transport (1a).

A one-man bow saw with an asymmetric frame of approx. 100 cm length is recommended (1). There are also models with a symmetric frame and one side of the bow extended into a handle which allows more force in cutting but restricts movement if space is narrow (1b).

For a frame of 100 cm length, the corresponding saw blades (2) are 91.5 cm long and usually have hard-pointed peg teeth (2a) or raker teeth (2b).

When a hard-pointed blade loses its set and starts pinching, it should be re-set with setting pliers (3).

When the blade becomes dull, it can be re-sharpened with a whetstone (4). If the saw runs to one side, the whetstone should be used on the side to which it is running (5).

Hard-pointed blades wear out after some time and must then be discarded. Great care must be taken during cutting to avoid contact with soil, sand and stones.


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