MACHINIST / TURNER
Name of Sector Production & Manufacturing Name of Module Turning
Minimum Age 18 Years Duration of Course 6 Months
ADU Code MAN701

Degree in Mechanical Engineering with one year Experience

(OR)

Diploma in Mechanical Engineering with two year Experience

(OR)

NTC/ NAC in Turner Trade with three years of Experience



TERMINAL COMPETENCY: The successful candidate would be able to:

Use safety devices.

Familiar with the necessary safety precautions required to run a lathe.

Plan the sequence of operations.

Identify and know the purpose of the work-holding and driving accessories

Identify and know the purpose of the cutting-tool-holding accessories

Know the various types of materials, cutting tools, measuring instruments and its application.

To operate the conventional turning lathe machine and produce components involving simple turning, step turning, taper turning, threading and knurling.

To acquaint themselves in internal drilling & boring operation

Understand the surface finish symbols, ISO specification on carbide tools.

Determine spindle speed, feed and depth of cut for different materials as roughing, finishing operation.

To operate the conventional turning lathe machine, special purpose machine tool and produce components involving step turning, taper turning, eccentric turning, different types of threads and knurled surface.

To produce components of ferrous and non-ferrous materials involving internal drilling, tapping, reaming, boring & threading.



Practical Competencies Underpinning Knowledge (Theory)

OSH & Safety Practices: (10 hours)

  • Fire Fighting in workplace & Precautions
  • General Safety of Tools & Equipments
  • Awareness on OSH related to the job


  • Fire Extinguishers & its Types
  • Safely handling Tools & Equipments
  • Use of proper Tools & Equipments & its maintenance
  • OSH & practices to be observed as a precaution

Personnel & Material Safety: (10 hours)

  • Select, use, clean and store personal safety protective equipment.
  • Use and store of materials in a safe manner.
  • Demonstrate the use of safety devices on metal cutting machines.
  • 5S norms


  • State the safety precaution specific to turning on the lathe.
  • Safety related to handling of materials.
  • Safety devices used for safe machining.

Lathe & Tool specification: (20 hours)

  • Demonstration of turning operation on lathe.
  • Practice on operation of lathe
  • Selection of tools, general cleaning and maintenance and safe storage of tools applicable to workshop tasks.


  • Introduction to Lathe, description, types of Lathe - constructional features and functions.
  • Specification of a Center Lathe.
  • Identify types of lathe tools and their uses.
  • Classification & properties of tool materials & selection criteria. ISO specification on carbide tools.

Job Holding & Centering: (20 hours)

  • Demonstrate the use of job holding devices on metal cutting machines & safety precautions.
  • Study of process planning sheet
  • Practice on centering the job.
  • Use of three and four-jaw chuck
  • Soft jaw boring.


  • Different job holding devices in turning.
  • Describe the basic method of Work holding devices - three jaw chuck, four jaw chuck, face plate, collet chuck etc.
  • Describe the basic methods of supporting work – fixed steady, follower steady, tail stock.

Measuring job: (20 hours)

  • Check measurements using Calipers & standard steel rule : Inch and Metric
  • Check measurements of components/machined parts, using micrometers and Vernier, bore gauge, height gauge, depth gauge
  • Check roundness of components using the dial test indicator and V-blocks.


Describe the principle of the measuring instruments: its use and care for measurement setting up and assembly operations-

Micrometer: internal, external, depth.

Gauges: bore gauge, height gauge,depth gauge

Vernier: Caliper, depth, height.

Dial test indicator: its measurement.

Turning operation: (100 hours)

  • Simple turning using manual feed.
  • Practical on work alignment, facing, turning, drilling, filleting, chamfering, grooving and parting off.
  • Practical on knurling.
  • Sharpening of turning, boring, grooving, parting off tool on pedestal grinder and inspection.
  • Carryout general turning between centers, usage of steady and follower rests.


  • Describe the geometry of the lathe tool including tool angles and its effect on turning for roughing and finishing operation.
  • Type of cutting fluids & properties.
  • Calculation of speed, feed & depth of cut using feed-speed chart.
  • Carry out Simple machining calculation.
  • Lathe operations- turn, drill, face, chamfer, and part off knurl, threading, taper and form turn.

Turning & Drilling: (80 hours)

  • Practice on faceplate balancing.
  • Practical on Taper turning by compound slide.


  • Describe the different types of drills and taps used.
  • Classification of steels, alloy steels and effect of alloying elements.
  • Taper - types and uses, calculation on taper turning.
  • Describe the methods of taper turning - compound slide, tailstock off-set, forming tool, taper-turning attachment and their merits and demerits.
  • Describe the methods of taper inspection-by taper plug gauge and ring gauge.
  • Identify the turning fault & remedies.

Advance Turning: (120 hours)

  • Turning of non-ferrous metal & non-metals such as plastic, polypropylene etc.,
  • Practical on centering, pilot drilling, counter drilling, and chamfering.
  • Perform boring operation.
  • Produce jobs with different diameters within the permissible concentricity.
  • Check prepared specimens for limits and fits.
  • Taper turning by tailstock offset method.


  • The significance of surface roughness, description of its symbols and its influence on the function of a component.
  • Precautions while turning soft material like Aluminum
  • Introduction to Special purpose lathe -Capstan, turret, copying, spinning.

Thread cutting: (120 hours)

  • Set a grooving tool & perform an undercutting operation for threading.
  • Set a threading tool to cut V thread and cut different types of V thread – BSW and metric
  • Perform under cut inside the bore on a required length.
  • Cutting square threads
  • Cutting double triple start threads.
  • Cut "V" thread (internal).
  • Cutting eccentric jobs.


  • Types of threads, forms of thread and its depth calculation.
  • Calculation of speed, feed & depth of cut for cutting different types of thread on ferrous and non ferrous metals.
  • Describe the methods of producing internal and external screw threads - single-start, multi-start.
  • Describe the methods of carrying out drilling, grinding and reaming operations.
  • Off-set turning techniques, eccentric turning and knurling.
  • Identify turning fault & correction.