64 MODERN BLACKSMITHING 



the ends and set the saw between the ends so that 

 they will meet over the place where the hole is to be 

 drilled. When the saw is dark blue, the temper is 

 out. It might be a possibility that this will spring the 

 saw in some cases, therefore, I advise you to try drill- 

 ing the hole without any change in temper. Prepare 

 a drill that is harder than usual, use no oil, but water. 



HOW TO PREVENT A CIRCULAR SAW 

 FROM CRACKING 



The reason why a circular saw cracks is, in most 

 cases, incorrect filing. In filing a saw, never let a 

 flat file with its square corners touch the bottom of the 

 teeth you are filing; if you do, you will make a short 

 cut that will start the crack, The best way is to gum 

 the saw in a saw gummer or on an emery wheel, or 

 use a round-edged file. 



HOW TO SEW A BELT 



Belts can be riveted, sewed, or hooked together. A 

 new leather belt should not be riveted, because such 

 a belt will stretch and have to be cut out and sewed 

 over quite often at first. There are hooks made of 

 steel for belt sewing, these are all right when the pul- 

 leys are not less than six inches in diameter and the 

 speed is slow. In using these hooks be careful not to 



