THE FARM SHOP 



41 



punch is used to mark the center of the hole to be bored 

 and to start the drill in the right spot. 



Figure 51. Twist-Drills. Round shank for the post drill and 

 square taper shank for brace work. Brace drills are small, }4" or 



less. 



Figure 52. Taper Reamer. Used to enlarge, or true, or taper a hole 

 that has been drilled or punched. 



Figure 53. Another style of Reamer. 



Figure 54. Countersink. This is the old style, blacksmith-made, 

 flat countersink. It will do quick work but not so smooth as the 

 fluted kind. 



In doing particular work, the drill may be re- 

 centered when it starts wrong. This is done with a 



