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Engineman 2 - Intermediate engine mechanics training manual
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Figure 9-8.–A. Four-Jaw chuck. B. Three-Jaw chuck. Round-Nosed   Turning   Tool.–This  tool  is  for general-purpose  machine  work  and  is  used  for  taking light roughing cuts and finishing cuts. Usually, the top of the cutter bit is ground with side rake so the tool may be  fed  from  right  to  left.  Sometimes  this  cutter  bit  is ground  flat  on  top  so  the  tool  may  be  fed  in  either direction (fig. 9-7, view B). Right-Hand   Turning   Tool.–This    is    just    the opposite of the left-hand turning tool and is designed to cut when it is fed from right to left (fig. 9-7, view C). The cutting edge is on the left side. This is an ideal tool for  taking  roughing  cuts  and  for  all-around  machine work. Left-Hand  Facing  Tool.–This tool is intended for facing on the left-hand side of the work (fig. 9-7, view D). The direction of feed is away from the lathe center. The cutting edge is on the right-hand side of the tool, and the point of the tool is sharp to permit machining a square  corner. Threading Tool.–The point of the threading tool is ground  to  a  60-degree  included  angle  for  machining V-form screw threads (fig. 9-7, view E). Usually, the top of the tool is ground flat, and there is clearance on both sides of the tool so it will cut on both sides. Right-Hand Facing Tool.–This  tool  is  just  the opposite of the left-hand facing tool and is intended for facing the right end of the work and for machining the right side of a shoulder (fig. 9-7, view F). Square-Nosed  Parting  (Cutoff)  Tool.–The principal cutting edge of this tool is on the front (fig. 9-7, view  G).  Both  sides  of  the  tool  must  have  sufficient clearance  to  prevent  binding  and  should  be  ground slightly narrower at the back than at the cutting edge. This tool is convenient for machining necks and grooves and for squaring comers and cutting off. Boring Tool.–The boring tool (fig. 9-7, view H) is usually ground the same shape as the left-hand turning Figure  9-9.–Draw-in  collet  chuck. 9-6







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