__________ is fitted on the top of cross slide and is used to support the tool post and the cutting tool.

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RRB JE ME CBT 2 Previous Paper 1: Held on 29 Aug 2019
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  1. Tail stock 
  2. Compound rest
  3. Carriage 
  4. Saddle

Answer (Detailed Solution Below)

Option 2 : Compound rest
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Concept:

A lathe is a machine tool that holds the job in between the center and base and rotates the job on its own axis.

Main parts of Lathe:

Bed

  • It is the base or foundation of the lathe
  • It is a heavy, rugged and single piece casting made to support the working parts of the lathe
  • It is made from grey or nodular cast iron or it is fabricated by welding steel plates together

Carriage

  • It is used to support the cutting tool and to move it along the bed so that it can cut the metal
  • It essentially consists of three parts: the saddle, the apron, and the cross-slide

Headstock

  • It is clamped on the left-hand side of the bed
  • Its function is to support the main spindle or mandrel

Tailstock

  • It is situated at the right-hand end of the bed and is mounted on the inner guideways
  • It is used to support the loose ends of the lengthy jobs for carrying out lathe operation
  • It is used to hold cutting tools like drill chuck, drills, reamers etc.

 

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The carriage has the following five major parts:

Saddle: It is an H–shaped casting fitted over the bed. It moves along the guideways.

Cross–Slide: It carries the compound slide and tool post. It can be moved by power or by hand.

Compound rest: It is marked in degrees. It is used to support the tool post and the cutting tool. It is used during taper turning to set the tool for angular cuts.

Tool Post: The tool is clamped on the tool post.

Apron: It is attached to the saddle and hangs in front of the bed. It has gears, levers, and clutches for moving the carriage with the lead screw for thread cutting.
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