SAQA All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.
SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Produce components by performing engineering grinding operations 
SAQA US ID UNIT STANDARD TITLE
258716  Produce components by performing engineering grinding operations 
ORIGINATOR
SGB Generic Manufacturing, Engineering, Technology 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 06 - Manufacturing, Engineering and Technology Manufacturing and Assembly 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 3  NQF Level 03  12 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Reregistered" 		 2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard replaces: 
US ID Unit Standard Title Pre-2009 NQF Level NQF Level Credits Replacement Status
13294  Produce components by performing engineering grinding operations  Level 3  NQF Level 03  12   

PURPOSE OF THE UNIT STANDARD 
The skills, values and knowledge reflected in this unit standard are required by people in the field of mechanical engineering.

Qualifying learners can carry out engineering grinding operations and check the results with precision measuring instruments.

A person credited with this unit standard is able to:
  • Explain and discuss surface grinding processes.
  • Grind work piece square.
  • Grind angles.
  • Grind component on cylindrical grinding machine. 
    		•

    LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    This unit standard has been designed as part of a progression. It is one of a series of unit standards for grinding in the engineering machining skills area.

    The credits allocated to this unit standard assume that a learner has already learned to:
  • Operate and monitor a surface grinding machine at NQF Level 2. 
    		•

    UNIT STANDARD RANGE 
    The scope and level of this unit standard is limited to common commercial rubber applications and is determined by the ranges as indicated under the specific outcomes.

    The learner should be able to work autonomously with minimal supervision. 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Explain and discuss surface grinding processes. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The principle operation, function and processes of the cylindrical grinding machine is explained to reflect understanding of different machine types. 
    ASSESSMENT CRITERION RANGE 
    Principle operation includes internal and external grinding.
     

    ASSESSMENT CRITERION 2 
    The difference in operating procedures is discussed to reflect taper, radius and form grinding. 

    ASSESSMENT CRITERION 3 
    The principle operation, function and purpose of the different grinding wheels are explained to reflect understanding of different types. 
    ASSESSMENT CRITERION RANGE 
    Different grinding wheels of both internal and external grinding include but are not limited to tungsten carbide and silicon carbide wheels.
     

    ASSESSMENT CRITERION 4 
    The implications of using the incorrect sequence of cylindrical grinding activities, operations and decisions are explained in terms of safety, damage and quality. 

    ASSESSMENT CRITERION 5 
    Cylindrical grinding feeds are explained in terms of the formula charts used for different materials in accordance with requirements. 

    SPECIFIC OUTCOME 2 
    Grind work piece square. 
    OUTCOME RANGE 
    Work piece materials may include both non-ferrous and ferrous metals and alloys. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Preparation activities are undertaken to grind the work piece square. 
    ASSESSMENT CRITERION RANGE 
    Preparation activities include but are not limited to dressing the wheel and clamping the job on magnetic chuck, stroke length is set, sharpen and shape grinding wheels.
     

    ASSESSMENT CRITERION 2 
    Measuring equipment is selected to enable inspection against drawing specifications. 
    ASSESSMENT CRITERION RANGE 
    Measuring equipment includes but is not limited to micrometer, depth micrometer, vernier, Johnson slip gauges, sine bar.
     

    ASSESSMENT CRITERION 3 
    The work piece is ground in accordance with drawing specifications including tolerances. 

    ASSESSMENT CRITERION 4 
    The block is measured utilising the selected measuring equipment to reflect the requirements of the drawing. 

    SPECIFIC OUTCOME 3 
    Grind angles. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Preparation activities are undertaken to grind angles. 
    ASSESSMENT CRITERION RANGE 
    Preparation activities include but are not limited to dressing the wheel and clamping the job on magnetic table, clocking sine bar parallel to machine head, stroke length is set, sharpen and shape grinding wheels.
     

    ASSESSMENT CRITERION 2 
    Sine table is used to calculate the required angle in accordance with drawing specifications. 

    ASSESSMENT CRITERION 3 
    Johnson slip gauges are used to maintain the required height during the process of grinding. 

    ASSESSMENT CRITERION 4 
    Measuring equipment is selected to enable inspection against drawing specifications. 
    ASSESSMENT CRITERION RANGE 
    Measuring equipment includes but is not limited to height gauge, dial indicator, vernier, Johnson slip gauges, sine bar and/or vice, protractor.
     

    ASSESSMENT CRITERION 5 
    Angles are ground in accordance with drawing specifications including tolerances. 

    ASSESSMENT CRITERION 6 
    Angles are measured utilising the selected measuring equipment to reflect the requirements of the drawing. 

    SPECIFIC OUTCOME 4 
    Grind component on cylindrical grinding machine. 
    OUTCOME NOTES 
    The range of grinding operations must include internal and external cylindrical grinding, grinding taper, form grinding and radius. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Preparation activities are undertaken to use cylindrical grinding machine for internal and external grinding. 
    ASSESSMENT CRITERION RANGE 
    Preparation activities include but are not limited to dressing the wheel and clamping the job in chuck or expanding mandrel, clocking, stroke length is set, safety requirements, setting speeds and feeds, taper and radius, sharpen and shape grinding wheels.
     

    ASSESSMENT CRITERION 2 
    Measuring equipment for external grinding is selected to enable inspection against drawing specifications. 
    ASSESSMENT CRITERION RANGE 
    Measuring equipment includes but is not limited to micrometers, depth micrometer, radius gauges.
     

    ASSESSMENT CRITERION 3 
    The diameter of the component is ground in accordance with drawing specifications including tolerances. 

    ASSESSMENT CRITERION 4 
    The diameter of the component is measured utilising the selected measuring equipment to reflect the requirements of the drawing. 

    ASSESSMENT CRITERION 5 
    The external wheel is dressed to grind face of component to required length. 

    ASSESSMENT CRITERION 6 
    Measuring equipment for internal grinding is selected to enable inspection against drawing specifications. 
    ASSESSMENT CRITERION RANGE 
    Measuring equipment includes but is not limited to telescopic gauges, inside micrometers, depth micrometer, micrometer, radius gauges, internal taper.
     

    ASSESSMENT CRITERION 7 
    The internal diameter of the component is ground in accordance with drawing specifications including tolerances. 

    ASSESSMENT CRITERION 8 
    The internal wheel is dressed to grind face of component to required length. 

    ASSESSMENT CRITERION 9 
    The inside diameter of the component is measured utilising the selected measuring equipment to reflect the requirements of the drawing. 

    ASSESSMENT CRITERION 10 
    Equipment and machine is cleaned and equipment is stored in accordance with workplace procedures. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
    The assessment will be governed by the policies and guidelines of the relevant Education and Training Quality Assuror (ETQA) that has jurisdiction over this field of learning.

    The assessor will (at the very least) be accredited and have a relevant qualification and be a subject matter expert in this learning area and at least have 3 years experience in the skills specific area.

    The learner can be assessed against this unit standard to obtain credits or as part of an integrated assessment for a qualification:
  • Internal moderation.
  • External moderation.
  • An assessor, accredited by the relevant ETQA, will assess the learner's competency.
  • Assessment procedures will be supplied by the ETQA in alignment with NSB requirements.
  • All assessment activities must be fair, so that all candidates have equal opportunities. Activities must be free of gender, ethnic or other bias.
  • Assessment and moderation procedures, activities and tools must be transparent, affordable and support development within the field, sub-field and NQF.
  • Questions and answers to determine theoretical knowledge are expected.
  • Assessment of a portfolio of evidence.
  • Direct observation in simulated and/or controlled work conditions. 
    		•

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    Names, functions and locations of:
  • Accessories.
  • Work holding fixtures.
  • Grinding wheels.
  • Measuring equipment.
  • Personal protective equipment.
  • Common defects.

    Purpose of processes and procedures of:
  • Grinding operations covered by this unit standard.
  • Material preparation.
  • Safety checks.

    Attributes, properties, characteristics related to:
  • Material types.
  • Machining time limits.

    Cause and effect, implications of:
  • Implications of selecting inappropriate accessories, work holding fixtures, grinding wheels, table speeds and feeds.
  • Implications of incorrect installation of accessories, work holding fixtures and grinding wheels.
  • Implications of component not meeting specifications, e.g. poor finishes, uneven surface textures, incorrect size.
  • Implications and consequences of situations such as, e.g. damaged or faulty equipment, allowing faulty processes to continue, delaying reports about changing conditions.
  • Implications of not meeting machining time limits.

    Procedures and techniques:
  • Set up procedures for grinding machine.
  • Grinding operations and procedures covered by this unit standard.
  • Measuring procedures.
  • Machine cleaning procedures.
  • Recording and reporting procedures.

    Regulations, legislation, agreements, policies:
  • Applicable safety, health and environmental protection legislation and standards.
  • Applicable quality standards and specifications.

    Theory - rules, laws, principles:
  • Applicable machining theory covering speeds and feeds, material properties and the underlying principles of grinding.
  • Applicable mathematical concepts including geometry, trigonometry and algebra.
  • Applicable underlying scientific concepts.

    Relationships, systems:
  • The relationship of the drawing to the machined component. 
    		•

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identifying and solving problems in which responses display that responsible decisions using critical and creative thinking have been made when:
  • Recognise problems while machining components and respond appropriately. 
    		•

    UNIT STANDARD CCFO WORKING 
    Working effectively with others as a member of a team, group, organisation, and community. 

    UNIT STANDARD CCFO ORGANISING 
    Organising and managing oneself and one's activities responsibly and effectively when:
  • Plan sequence of operations based on job requirements and set up machine appropriately. 
    		•

    UNIT STANDARD CCFO COLLECTING 
    Collecting, analysing, organising and critically evaluating information to better understand and explain:
  • Collect sensory and numeric information from the process and the machined component.
  • Classify the information and identify deviations from the norm. 
    		•

    UNIT STANDARD CCFO COMMUNICATING 
    Communicating effectively using visual, mathematical and/or language skills in the modes of oral and/or written persuasion when:
  • Record outputs, incidents, measurements.
  • Report incidents and conditions.
  • Respond to questions or requests for more details. 
    		•

    UNIT STANDARD CCFO SCIENCE 
    Using science and technology effectively and critically, showing responsibility towards the environment and health of others when:
  • Understand and explain machining theory and mathematical and scientific concepts underpinning the machining operation. 
    		•

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrating an understanding of the world as a set of related systems by recognising that problem-solving contexts do not exist in isolation when:
  • The relationship of the drawing to the final machined component.
  • The manufacturing purpose of the machined component. 
    		•

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    This unit standard replaces unit standard 13294, "Produce components by performing engineering grinding operations", Level 3, 12 credits. 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  91926   National Certificate: Mechanical Engineering: Machining and Tooling  Level 3  NQF Level 03  Passed the End Date -
    Status was "Reregistered"     		 2023-06-30  As per Learning Programmes recorded against this Qual 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    NONE 


    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.