MANUFACTURING TECHNOLOGY
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1. Speed Lathe It has a bed, headstock, tailstock, and tool post. There is no leadscrew, feed box and apron mechanism. Tool is fed by hand only. Very high spindle speeds are used (1200 to 3600 rpm.) This type of the lathe is used for wood turning, spinning and polishing.
2. Centre Lathe This is the widely used lathe. It has the headstock, tailstock, carriage and bed. Automatic feeds are available. Different speeds and feeds are available, Lead Screw, feed rod and change gears are provided. The headstock may be back geared or all geared. It us used for many operations like turning, taper turning, facing, threading drilling, reaming, knurling and forming on different sizes of work on different metals.
3. Bench Lathe It is a small lathe mounted on a bench. It has all the parts like a centre lathe and is used for many operations. The difference is that the bench lathe is small in size. It is used for small works.
4. Tool room Lathe It is a very accurate lathe. It is designed for precision turning work on tools, gauges and dies. It has an accurate collet chuck, relieving and taper turning attachments. It has more range of speeds and feeds. This lathe is used in tool rooms.
4. Turret and capstan Lathe 5.
This is a heavy lathe used for mass production. The headstock is heavier than centre lathe and has more speeds and feeds. Speed is changed by lever. There are two tool posts, a front tool post and a rear tool post. The front tool post caries four tools. The rear tool post carries a parting tool there is no tailstock. But there is a hexagonal turret fixed in a carriage. The turret carries six tools. Any one tool can be brought into working position by indexing. Many operations can be done simultaneously by the front tool post, rear tool post and turret. The work and tools need not be changed for a complete cycle operations. The production time is very less. The accuracy will be more.
6. Automatic Lathe All the operations are automatic in this lathe. All the tool movements for machining are automatic. The loading and unloading of work is done automatically in this lathe. High speeds and many feeds are available. Speed and feed changes are also automatic. There is a cam shaft carrying a number of cams. The cams will make the speed changes, feed changes and tool changes. Machining time is very less.
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