417 



hand, after it has been jointed place a try-square against the edge, 

 and with the sharp point of a file make a scratch across the blade 

 r or the face of each tooth, as shown by the dotted lines Figs. 172 

 and 173, and then file the teeth only in part to a point the first 

 time across from end to end. Some filers always change ends 

 with a saw after filing one side. But it is of little consequence 

 how a man files, if he only does it in a workmanlike manner. 

 After a saw has been filed, in order to have it cut a kerf a little 

 wider than the blade the points of the teeth must be set. 



SETTING SAWS. 

 FIGS. 175, 176, 177. 



CKOSS SECTIONS OF SAWS. 



626. Fig. 175 represents a cross section of a saw with the 

 points of the fleam-pointed teeth set, showing the cleaners, or 

 teeth that are filed square across. (See Par. 653.) 



627. Fig. 176 is a section of saw in which all the teeth have 

 been set. When a saw is well filed it will appear like these fig 

 ures when viewed endways, and a cambric needle may be slid 

 along between the points of the teeth, from one end of a saw to 

 the other. 



628. Fig. 177 is a section of a saw, the teeth of which are set 

 more than they ought to be for the thickness of the plate ; and 

 the whole teeth having been set too much, the points have been 

 worn off, so that it will work very hard, and perhaps not at all 

 without great power. This shows the importance of setting as 

 little of the points as practicable. 



629. There are two kinds of set for saw teeth, lent set and 



