A mechanical fitter installs, maintains, repairs and overhauls mechanical plant and equipment: pumps, gearboxes, conveyors, compressors and the drives that turn them. The trade is central to keeping production running, and a fitter is usually judged on how quickly equipment is returned to service and how long it stays there.
This guide sets out mechanical fitter duties and responsibilities, the daily routine, and how the work differs by industry. It sits in the Trades Technical duties and responsibilities cluster, part of the wider job duties guide.
What Does a Mechanical Fitter Do?
A mechanical fitter strips, inspects, repairs and reassembles equipment, and installs new plant to drawing. The work covers planned maintenance on a schedule and breakdown response when something fails unexpectedly, and most fitters spend their week moving between the two.
The habit that defines a good fitter is finding out why something failed. Replacing a bearing returns the machine to service; establishing that misalignment destroyed the bearing stops it happening again in six weeks. Employers who track repeat failures notice the difference quickly.
Key Mechanical Fitter Duties and Responsibilities
- Carrying out planned preventive maintenance to the schedule.
- Responding to breakdowns, diagnosing faults and restoring equipment to service.
- Stripping, inspecting, repairing and reassembling pumps, gearboxes and drives.
- Installing and commissioning new mechanical plant to drawings and specification.
- Aligning couplings, shafts, belts and chains to tolerance.
- Replacing bearings, seals, gaskets and wear components correctly.
- Isolating and locking out equipment before work and confirming zero energy.
- Working from drawings, manuals and manufacturer specifications.
- Performing basic fabrication, cutting and fitting where the job requires it.
- Requisitioning spares and recording parts used against the job card.
- Investigating repeat failures and recommending improvements.
- Completing job cards and maintenance history records accurately.
Daily Tasks of a Mechanical Fitter
- Start of shift: take handover, review job cards and planned work, check outstanding breakdowns.
- Before work: obtain the permit where required, isolate and lock out, confirm the equipment is safe.
- Through the shift: carry out planned maintenance, respond to breakdowns as they are called.
- On completion: reassemble, align, test run and confirm the equipment is operating correctly.
- End of shift: close job cards, record parts used and hand over incomplete work.
Mechanical Fitter Skills and Competencies
- Fault diagnosis: establishing the cause rather than replacing parts until it stops.
- Precision: alignment, clearances and torque values applied properly.
- Drawing literacy: reading mechanical drawings and assembly manuals.
- Isolation discipline: lock-out and zero-energy confirmation, without exception.
- Working under pressure: restoring production safely rather than quickly at any cost.
- Record keeping: a maintenance history someone can actually use.
Mechanical Fitter Duties by Workplace or Industry
Manufacturing and Processing
Duties centre on conveyors, pumps, gearboxes and packaging equipment, with planned maintenance scheduled around production and heavy pressure to shorten breakdown downtime.
Mining
Work operates under mining health and safety legislation with stricter permit systems, formal risk assessment before each task, and equipment that is larger and harder to access.
Water, Energy and Utilities
Duties focus on pumps, valves and rotating equipment on continuous plant, with shutdown windows planned well in advance and detailed commissioning records required.
Workshops and Contracting
Overhaul and refurbishment work to job cards, with duties around dimensional inspection, reporting on component condition and quoting for repair versus replacement.
Mechanical Fitter Duties for a CV
Lead with your trade test, then the plant you maintained and your downtime record. Use the duties for a CV guide for the method.
- Maintained conveyor, pump and gearbox installations across a processing plant, closing an average of 22 job cards a week.
- Responded to breakdowns with an average restoration time under 90 minutes.
- Carried out laser alignment on drive couplings, reducing repeat bearing failures on two critical lines.
- Applied lock-out and permit procedures on every task, with no safety incidents over five years.
Related Job Roles and Responsibilities
These guides cover the roles and next steps most closely related to this one.
- Boilermaker duties and responsibilities
- Machine Operator duties and responsibilities
- Electrician duties and responsibilities
- Foreman duties and responsibilities
- Job description duties and responsibilities
Frequently Asked Questions About Mechanical Fitter Duties
What are the duties of a mechanical fitter?
Carrying out planned maintenance, responding to breakdowns, stripping and rebuilding pumps gearboxes and drives, installing and commissioning plant, aligning couplings and shafts, replacing bearings and seals, isolating and locking out equipment, working from drawings, requisitioning spares and completing job cards.
What is the difference between a fitter and a fitter and turner?
A fitter assembles, installs and maintains mechanical equipment. A fitter and turner adds machining: producing or modifying components on a lathe or milling machine. The second qualification covers both and is broader.
Why does alignment matter so much?
Misalignment between a motor and the equipment it drives destroys bearings, seals and couplings, often within weeks. A machine that keeps failing on the same component usually has an alignment or foundation problem rather than a parts quality problem.
How do you qualify as a mechanical fitter?
The standard route is an apprenticeship or learnership combining workplace experience with theory, followed by a trade test. Mining and some heavy industries add sector-specific inductions and competencies on top.
What is a permit to work and when is one needed?
A permit to work is written authorisation to carry out a specific task on specific equipment, issued after the hazards have been assessed and controls put in place. Fitters typically need one for hot work, confined space entry, work at height and any intervention on live or stored-energy systems. The permit names who isolated what, and it is returned and closed when the job is finished.
Duties vary by employer and sector. Where permit-to-work systems, mining health and safety legislation or manufacturer specifications apply, those take precedence over this general guide.
Last reviewed: 2 September 2026