WOODWORKERS' TOOLS AND EQUIPMENT 
85 
is tightened by screwing it down firmly against the back of the 
sawblade. Either type permits the ready removal of the handle 
from the blade. 
Teeth. — The teeth on a cross-cut saw are arranged in pairs, 
trios or quadruplets, each set of which is separated by a cleaner 
or raker for removing the sawdust. Where skilful filers are not 
available a saw without rakers may be used, the sawdust being 
carried out of the cut by the teeth. The forms of teeth preferred 
PERFECTION N0.4 
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Fig. 9. — Saw Teeth Patterns, a. Often used for sawing southern yellow 
pine, cypress and spruce. &. For sawing white pine, hemlock and cedar. 
c. For sawing yellow poplar and cottonwood. d. For sawing redwood. 
e. For sawing Douglas fir. /. For sawing white oak. 
are as follows: yellow pine, cypress and spruce — perforated 
lance teeth, arranged in sets of four (Fig. 9a); white pine, hem- 
lock and cedar — broad teeth in sets of two (Fig. 9b) ; poplar 
and cottonwood — heavy solid teeth in twos (Fig. 9c) ; redwood 
— solid lance teeth in twos (Fig. 9d) ; Douglas fir — solid lance 
teeth of fours (Fig. 9e) ; white oak — solid teeth in sets of three 
(Fig. 9f). 
The cutting teeth constitute a series of knives which strike the 
fibres at right angles and sever them on either side of the cut. 
The cleaners or rakers free the severed fibres which are then 
