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Elements and Performance Criteria

1. Observe safety precautions
   • Correct safety procedures are observed and protective clothing and safety glasses worn.
2. Determine job requirements
   • Drawings are interpreted, sequence of operation is determined and tooling is selected to produce component to specification.
3. Mount job
   • Job is set up using instruments such as dial test indicators, and digital read-out equipment.
4. Perform turning operations
   • Speeds and feeds are calculated using appropriate mathematical techniques and reference material.
   • The full range of accessories on a centre lathe are used including three and four jaw chucks, centres, face plate, steadies, cross slide and tailstock.
   • Turning operations are performed to specification.
5. Check components for conformance with specifications
   • Components are checked for conformance to specification using appropriate techniques, tools and equipment.

Required Skills

Evidence Required

The evidence guide specifies the evidence required to demonstrate achievement in the unit of competency as a whole It must be read in conjunction with the unit descriptor performance criteria range statement and the assessment guidelines for the Metal and Engineering Training Package
Overview of assessment requirements	A person who demonstrates competency in this unit must be able to perform lathe operations Competency in this unit cannot be claimed until all prerequisites have been satisfied
Context of assessment	This unit may be assessed on the job off the job or a combination of both on and off the job Where assessment occurs off the job that is the candidate is not in productive work then an appropriate simulation must be used where the range of conditions reflects realistic workplace situations The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team The assessment environment should not disadvantage the candidate
Interdependent assessment	This unit could be assessed in conjunction with any other units addressing the safety quality communication materials handling recording and reporting associated with centre lathe operations or other units requiring the exercise of the skills and knowledge covered by this unit
Method of assessment	Assessors should gather a range of evidence that is valid sufficient current and authentic Evidence can be gathered through a variety of ways including direct observation supervisors reports project work samples and questioning Questioning techniques should not require language literacy and numeracy skills beyond those required in this unit of competency The candidate must have access to all tools equipment materials and documentation required The candidate must be permitted to refer to any relevant workplace procedures product and manufacturing specifications codes standards manuals and reference materials
Consistency of performance	Assessors must be satisfied that the candidate can competently and consistently perform all elements of the unit as specified by the criteria including required knowledge and be capable of applying the competency in new and different situations and contexts
Required skills	Look for evidence that confirms skills in
	interpreting technical drawingsspecifications in relation to turning
	setting up jobs using appropriate equipment
	calculating and setting cutting feeds and speeds appropriate to the job
	checking that job is concentric running true etc
	safely operating lathes
	performing turning operations
Required knowledge	Look for evidence that confirms knowledge of
	sequence of operations to achieve the job requirements
	tool type and geometry to achieve the required specifications and for work pieces of different materials
	numerical operations geometry and calculationsformulae within the scope of this unit
	the consequences of varying speeds and feeds from the optimum rates calculated
	characteristics of different materials and their effects on cutting speeds and feeds
	application of lathe accessories
	techniques tools and equipment to measure materials and machined components
	use and application of personal protective equipment
	safe work practices and procedures
	hazards and control measures associated with lathe operations

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Range Statement

The range statement provides information about the context in which the unit of competency is carried out. The variables and scope cater for different work requirements, work practices and knowledge between States, Territories and the Commonwealth, and between organisations and workplaces. The range statement relates to the unit as a whole and provides a focus for assessment. Text in italics in the performance criteria is explained here. The following variables may be present and may include, but are not limited to, the examples listed under the scope. All work is undertaken to relevant legislative requirements, where applicable
Variable	Scope
Drawings	Engineering drawings to AS 1100/1102
Tooling	Cutting tools, boring bars, drills, reamers, thread chasers, tapping heads, taps etc.
Instruments	Manual and digital micrometers, vernier calipers, dial indicators, scribing blocks
Speeds and feeds	Setting up machine, changing gears and speeds, use of lead screw, calculations
Accessories	Three and four jaw chucks, centres, face plate, steadies, cross slide, tailstock
Turning operations	Manual parallel and taper turning, internal and external turning including boring drilling, reaming, single start thread cutting, parting off

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