POWER WOOD-WORKING MACHINES 435 



501. Miscellaneous Machines. Other wood-working 

 devices which may be briefly mentioned are the molding 

 machine, the shaper, and the boring machine. The molding 

 machine is used for cutting various kinds of ornamental 

 moldings for interior and exterior finishing. The work is 

 fed to the different shaped cutters by rollers. 



The shaper is used for finishing edges in irregular shapes. 

 The cutters are interchangeable and thus are capable of 

 making a great variety of shapes. 



The boring machine is used for drilling or boring holes 

 through wood. An augur or drill is fastened with a holder 

 in a revolving spindle which is operated by an automatic 

 feed or hand-lever. 



The mortising machine is used for cutting mortises or 

 slots for the reception of tenons or ends which are shaped 

 to fit into such slots. The wood is placed upon the table of 

 the machine and the slot or mortise is cut by a drill arranged 

 in a chisel-shaped cutter. The drill removes most of the 

 stock, and the edges are squared and finished by the cutter. 

 This machine is operated by a foot-lever and can be set to 

 cut any depth or width of mortise. 



The tenon machine is used only for cutting tenons. It 

 consists of four heads two for roughing and two for finishing. 

 Very accurate work can be done with it. 



The sandpapering machine consists of revolving cylinders 

 covered with sandpaper which polish the surfaces of boards 

 passed between them. There are, too, various automatic 

 machines used for grinding and sharpening saws and other 

 edged tools. 



502. Prevention of Accidents. The machinery used in 

 wood-working is exceedingly dangerous. It is important 



