7.2. Sawing Tools

Hand saws have triangular teeth and consist of tool steel. We distinguish between span-web saws and saws without span web.

Parts of a saw without span web

Figure 6 Parts of a span web saw

Parts of a saw without span web

Figure 7 Parts of a saw without span web

Kinds and dimensions of span-web saws (frame saws)

Kind of saw	Saw blade
	length in mm	width in mm	thickness in mm	Saw pitch in mm	Setting width*) in mm	Applications
cabinet saw	700;800	25	0.7	5	0.4	for work in grain direction; trimming, cutting off
pad saw	700:800	40	0.7	4	0.25	finer cuts across the grain direction, for wood-based materials
fret saw	700	10	0.7	3	0.25	for sawing out bends

*) tooth set: alternate bending out of saw teeth to reach a cutting width which is greater than the blade thickness.

Kinds and dimensions of saws without span web

Kind of saw	length in mm	Saw blade width in mm	thickness in mm	Saw pitch in mm	Setting width in mm	Applications
foxtail	250-500		0.7-0.8	3-5	0.2-0.25	fine work, cutting of plywood and other materials
keyhole saw	300		1.0	4	0.35	for cutting out openings
fine saw	250	65	0.5	1.5	0.15	especially for mitre cuts
back saw	300	100	0.7	3-4	0.2	like fine saw

nest of saws: Saw blades of all span-web saws known so far can be fixed to a handle as required.

Tool geometry of hand saws

Kind of saw	Angle at the a tool cutting edge in °
	a	b	g
cabinet, pad, fret saws	45	70	-25
foxtail saw, keyhole saw	60	60	-30
fine saw	65	50	-25
back saw	10	60	20

Recommendations for maintenance and use

Untension frame saws after use, turn the row of teeth inwards during transport, saturate wooden parts with linseed oil varnish or with polish to prevent impurities from getting into them; keep hand saws in a hangig position, clean the saw blade from impurities by means of petroleum or similar and protect it against rust by means of acid-free grease. Cover the teeth of saws without span web during transport and storage so that no injuries are possible.