CHAPTER 9LATHES AND LATHE MACHINING OPERATIONSThe engine lathe, its use, and its principal parts andtheir uses are knowledges and skills expected of an EN2.Although machine shop work is generally done bypersonnel in the Machinery Repairman (MR) rating,there may be times that you will find the lathe essentialto complete a repair job. This chapter will help you toidentify the engine lathe’s attachments, accessories, andtheir uses. Also, it will identify and explain differentmachining operations and the factors related tomachining operations. Of course, you will be expectedto know and to follow the safety precautions associatedwith machining operations.There are a number of different types of lathesinstalled in the machine shops in various Navy ships.These include the engine lathe, the horizontal turretlathe, and several variations of the basic engine lathe,such as bench, toolroom, and gap lathes. All lathes,except the vertical turret type, have one thing incommon. For all usual machining operations, theworkpiece is held and rotated about a horizontal axis,while being formed to size and shape by a cutting tool.In the vertical turret lathe, the workpiece is rotated abouta vertical axis. Of the various types of lathes, the typeyou are most likely to use is the engine lathe. Therefore,this chapter deals only with engine lathes and themachining operations you may have to perform.NOTE: Before you attempt to operate any lathe,make sure you know how to operate it. Read all operatinginstructions supplied with the machine. Learn the locationsof the various controls and how to operate them.ENGINE LATHEAn engine lathe similar to the one shown in figure9-1 is found in every machine shop. It is used mostly forFigure 9-1.—Typical engine lathe.9-1
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