Unit of competency details

Unit descriptor 

This unit covers performing complex grinding operations.

Application of the unit 

This unit applies to high precision operations such as jig grinding, grinding eccentrics, thread grinding, gauges, shapes and forms etc. Work includes the use of a range of precision measuring instruments. Grinding operations are performed on a variety of materials to achieve high levels of precision for dimensions and finish.

Band : A 

Unit Weight : 4 

Prerequisite units 

Path 1 

MEM07005C

Perform general machining

MEM07008D

Perform grinding operations

MEM09002B

Interpret technical drawing

MEM12003B

Perform precision mechanical measurement

MEM12023A

Perform engineering measurements

MEM18001C

Use hand tools

Employability skills 

This unit contains employability skills.

Elements describe the essential outcomes of a unit of competency.

Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold italicised text is used, further information is detailed in the required skills and knowledge section and the range statement. Assessment of performance is to be consistent with the evidence guide.

ELEMENT 

PERFORMANCE CRITERIA 

1. Determine job requirements

1.1. Job requirements are determined from specifications, and sequence of operations is determined.

2. Set up work

2.1. Grinding wheels are selected and dressed to form and size as required.

2.2. Work is set up to required level of accuracy as per specifications.

3. Perform complex grinding

3.1. Specialised grinding operations are performed on components such as jigs, tools and dies, eccentrics, threads, gauge shapes and forms.

4. Check components for conformance to specification

4.1. Components are checked for conformance to specification using appropriate techniques, tools and equipment.

REQUIRED SKILLS AND KNOWLEDGE 

This section describes the skills and knowledge required for this unit.

Required skills 

Look for evidence that confirms skills in:

• preparing an operational work plan
• dressing grinding wheel to form and size
• performing specialised grinding operations
• reading, interpreting and following information on written job instructions, specifications, charts, lists, drawings and other applicable reference documents
• planning and sequencing operations
• checking and clarifying information
• entering routine and familiar information onto proformas and standard workplace forms
• checking for conformance to specifications
• using precision measurement equipment within the scope of this unit
• measuring components to specified tolerances
• performing numerical operations, geometry and calculations/formulae for specialised complex grinding operations

Required knowledge 

Look for evidence that confirms knowledge of:

• reasons for selecting the chosen sequence of operations
• function and application of work holding devices/accessories appropriate to complex grinding
• appropriate techniques, tools and equipment to measure machined components
• hazards and control measures associated with complex grinding, including housekeeping
• use and application of personal protective equipment
• safe work practices and procedures

EVIDENCE GUIDE 

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.

Overview of assessment 

A person who demonstrates competency in this unit must be able to perform complex grinding operations. Competency in this unit cannot be claimed until all prerequisites have been satisfied.

Critical aspects for assessment and evidence required to demonstrate competency in this unit 

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.

Context of and specific resources for 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.

This unit could be assessed in conjunction with any other units addressing the safety, quality, communication, materials handling, recording and reporting associated with complex grinding 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, supervisor's 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.

Guidance information for assessment 

RANGE STATEMENT 

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.

Grinding wheels 

Wheel selection criteria includes shape and grit/bond composition

Unit sector 

Co-requisite units 

Competency field 

Machine and process operations