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MEMCAQA IronbarkSimulated workplace
Simulated workplace
Scenario · Machine Shop

Machine a replacement pump shaft on the lathe

You are a machinist at the Wodonga machining centre.

Intermediate4 to 5 hours8 tasks
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Home/Scenarios/Machine a replacement pump shaft on the lathe
The situation

What has happened

Kestrel Water Corporation have a split case pump out of service and have ordered a replacement shaft under job card JC-26-0415 to drawing KW-P17-03 rev A. The 4140 grade round bar arrived under receipt REC-26-0882 with its certificate on file. The shaft has two bearing journals with close tolerances, a keyway, a thread at the drive end and specified surface finishes. The horizontal borer is tagged out of service, so all work must be planned for the CNC lathe and the mill. Tan Nguyen, the Machine Shop Supervisor, wants the shaft finished, measured and reported by 22 September so the customer's fitters can rebuild the pump.

Your brief. Plan the machining sequence from the drawing, set up and operate the lathe and mill safely, hold the drawing tolerances on the journals, thread and keyway, measure with calibrated equipment and produce an inspection report so the shaft can be released to the customer.
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Tasks

Deliverables

  • Written machining sequence with tooling and speeds and feeds
  • Job Safety Analysis for the lathe and mill work
  • Inspection report with measured values against every toleranced dimension
  • Updated job card JC-26-0415 with hours and status

Documents to use

Systems to use

Job Card Register

Tracks every fabrication, machining and maintenance job from quote to close-out with customer, drawing, hours and status.

Plant and Equipment Register

Lists workshop machines, cranes, welding sets, measuring equipment and site tools with inspection, calibration and service status.

Materials and Certificate Register

Records receipts of steel, consumables and spares with purchase order, heat number, certificate reference and the job each item was issued to.

For trainers and assessors

Units of competency

Current on training.gov.au for the Manufacturing and Engineering as at 10 September 2026.

MEM07006Perform lathe operations
MEM07007Perform milling operations
MEM09002Interpret technical drawing
MEM12001Use comparison and basic measuring devices
MEM07001Perform operational maintenance of machines/equipment
MEM13015Work safely and effectively in manufacturing and engineering

Qualifications

MEM30219Certificate III in Engineering - Mechanical Trade
MEM30119Certificate III in Engineering - Production Systems
Assessor notes

What to look for

Evidence guide

Evidence should show a logical sequence that machines the journals last with a finish cut, correct speeds and feeds for 4140, and measurements recorded with the instrument identified and in calibration. Check that the student verified the equipment register before use, noted the borer was out of service, and that the inspection report would let the customer accept the shaft without re-measuring. Observe safe chuck, guard and swarf practice.

The student's evidence summary lists every record they created or changed in the systems named above, their notes and the tasks they ticked. Verify it against the deliverables and your own assessment tool.