Lathe accessories

This is a presentation on different types of lathe machine accessories which is a part of Manufacturing process I.

1. LATHE ACCESSORIES

2. CENTRES Used for holding the work piece in lathe. The entire load of the work piece and thrust developed due to metal cutting is taken by the centers Made up of very hard metals to resist deflection and wear . Included angle is generally between 60 - 75°. Its different types are live and dead center.

3. CHUCKS Used for holding and rotating a work piece in lathe. Components of any regular of irregular can be held. Attached to the spindle with bolts with the back plate screwed on spindle nose. Mainly two types : universal or three jaw chuck and four jaw chuck (independent) .

4. LATHE CARRIER They are used in conjunction with the d riving plate. It may be straight tailed or bent tailed. The work piece to be held is inserted in the V shaped hole. Work piece of larger diameter can’t be held.

5. FACE PLATE Used for holding the chuck in lathe. It is very heavy and has strong ribs. Nuts and bolts are used for clamping the chuck with it. Has thread in a hole in centre so that it can be fit into the spindle nose.

6. CATCH PLATE Also known as driving plate. For attachment to the end of head stock driving spindle, the hole in center in internally threaded. It also carries a hole for the pin which engages with the tail of the lathe carrier when the work piece is held.

7. ANGLE PLATE It is a L shaped plate with two faces machined at right angles on has slots for clamping on face plate. When work piece is such that it is not possible to clamp it to the chuck then angle plate is used.

8. MANDRELS It is a shaft made of high carbon steel and mounted between the centres. It is used for holding the pre drilled work pieces for outside machining. It is always rotated with the help of a dog and it is never placed in a chuck. Its various types are plain, step, collar, screw, cone, gang, expansion.

9. RESTS It is used to support a long slender job, which is turned between centres. It prevents the bending of work piece which is cause due to its own weight and vibrations of the cutting forces. It is generally used when length to diameter ratio is around 1 : 10-12. Mainly of two types : steady and follower.

10. SINGLE POINT CUTTING TOOL

11. GEOMETRY

12. THANK YOU