Mechanical project ideas

102 projects, from a first build to a final-year capstone. Each lists the skills it teaches and the tools it needs; times and costs are estimates.

Beginner projects

• Parametric Gear-Train CAD — Model a spur gear train whose tooth counts drive ratio, centre distance and part geometry automatically. Skills: gear geometry, parametric CAD, gear ratios. Tools: FreeCAD/Fusion 360. CAD / design, Up to 15 h, Software only (free tools).
• Simple Machines Mechanical Advantage Lab — Measure effort and load for levers, pulleys and inclined planes and compare with ideal mechanical advantage. Skills: mechanical advantage, friction, efficiency. Tools: spring scales, pulleys, ruler. Hardware build, Up to 15 h, Under $30.
• Spring Constant Measurement Rig — Hang known masses on springs, plot force versus extension and find stiffness and elastic limit. Skills: Hooke's law, stiffness, data plotting. Tools: springs, masses, ruler. Data lab, Up to 15 h, Software only (free tools).
• Bicycle Gear Ratio Explorer — Calculate cadence-to-speed for every chainring and sprocket combination and chart the gear overlap. Skills: gear ratios, transmission, visualisation. Tools: web app. Visualizer, Up to 15 h, Software only (free tools).
• Projectile Launcher Experiment — Launch balls at set angles, measure range and compare with ideal projectile equations. Skills: kinematics, air drag, error analysis. Tools: spring launcher, protractor, tape. Hardware build, Up to 15 h, Under $30.
• Free-Body Diagram Trainer — Practise drawing forces on beams, blocks and pulleys with automatic equilibrium checking. Skills: statics, free-body diagrams, equilibrium. Tools: web app. Visualizer, Up to 15 h, Software only (free tools).
• Hand-Crank Generator Study — Measure the voltage and power produced by a hand-crank generator at different speeds and loads. Skills: energy conversion, efficiency, torque. Tools: DC motor as generator, meters. Hardware build, Up to 15 h, Under $30.
• Cam and Follower Model — Build cams with different profiles and record follower displacement to compare motion curves. Skills: cam profiles, kinematics, motion curves. Tools: 3D printed/cardboard cams. CAD / design, Up to 15 h, Under $30.
• Friction Coefficient Tester — Measure static and kinetic friction of material pairs on an inclined plane. Skills: friction, inclined planes, measurement. Tools: incline board, protractor, samples. Hardware build, Up to 15 h, Under $30.
• Heat Conduction Bar Experiment — Measure temperature along heated rods of different metals and estimate thermal conductivity. Skills: conduction, Fourier's law, thermal gradients. Tools: metal rods, thermocouples. Data lab, Up to 15 h, Under $30.
• Paper Bridge Load Challenge — Design paper truss bridges, predict failure loads and compare designs per gram. Skills: truss design, buckling, design iteration. Tools: paper, glue, weights. Hardware build, Up to 15 h, Under $30.
• Rube Goldberg Energy Chain — Build a chain of mechanisms and estimate energy losses at each stage. Skills: energy transfer, mechanisms, losses. Tools: household materials. Hardware build, Up to 15 h, Under $30.
• Torque Wrench Calibration Check — Check a torque wrench against a lever arm and hanging masses and record its error. Skills: torque, calibration, measurement error. Tools: torque wrench, masses. Hardware build, Up to 15 h, Under $30.
• Pendulum Period Study — Measure pendulum periods for different lengths and amplitudes and compare with theory. Skills: oscillations, small-angle approximation, timing. Tools: string, bob, phone timer. Data lab, Up to 15 h, Software only (free tools).
• Bolted Joint Torque Calculator — Calculate tightening torque and clamp force for metric bolts with friction factors. Skills: bolt preload, torque-tension, friction. Tools: web calculator. Visualizer, Up to 15 h, Software only (free tools).
• Gear Pump Cutaway Model — 3D-print a transparent gear pump and explain flow rate versus speed and displacement. Skills: positive displacement, pump basics, CAD. Tools: 3D printer, CAD. CAD / design, Up to 15 h, Under $30.
• Belt Drive Tension Study — Measure slip and transmitted power of a belt drive at different tensions. Skills: belt drives, slip, tension ratio. Tools: pulleys, belt, motor. Hardware build, Up to 15 h, Under $30.
• Engineering Drawing Practice Set — Create orthographic, isometric and section views of five parts with correct dimensioning. Skills: technical drawing, GD&T basics, projections. Tools: CAD/drafting. CAD / design, Up to 15 h, Software only (free tools).
• Cooling Curve of Hot Water — Record cooling of water in different containers and fit Newton's law of cooling. Skills: convection, exponential fitting, insulation. Tools: thermometer, containers. Data lab, Up to 15 h, Under $30.
• Linkage Motion Toy — Build a four-bar linkage toy and trace the coupler curve for different link lengths. Skills: four-bar linkage, Grashof condition, motion. Tools: cardboard/3D printed links. CAD / design, Up to 15 h, Under $30.
• Material Hardness Comparison — Compare scratch and indentation resistance of common materials with simple tests. Skills: hardness, material properties, testing. Tools: test samples, indentation tool. Hardware build, Up to 15 h, Under $30.
• Centre of Gravity Finder — Find centres of gravity of irregular shapes by plumb lines and compare with CAD. Skills: centroids, equilibrium, CAD mass properties. Tools: cardboard shapes, CAD. CAD / design, Up to 15 h, Under $30.
• Water Rocket Thrust Experiment — Measure water rocket flight height versus water volume and pressure, safely. Skills: thrust, impulse, Newton's laws. Tools: PET bottle rocket, pump (supervised). Hardware build, Up to 15 h, Under $30.
• Shaft Speed Measurement With Tachometer — Measure shaft speed optically and compare with stroboscope readings. Skills: rotational speed, sensors, calibration. Tools: IR sensor, MCU, motor. Hardware build, Up to 15 h, Under $30.
• Solar Cooker Design Test — Build a box solar cooker and measure the temperature rise against reflector angle. Skills: solar thermal, insulation, reflectors. Tools: cardboard, foil, thermometer. Hardware build, Up to 15 h, Under $30.

Intermediate projects

• Fatigue-Life Calculator — Estimate fatigue life from stress amplitude, mean stress and S-N data with Goodman correction. Skills: fatigue, S-N curves, mean stress correction. Tools: Python/web app. Visualizer, 15–45 h, Software only (free tools).
• Vibration Diagnostic Rig — Mount accelerometers on a motor rig, add imbalance or misalignment and identify each fault in the spectrum. Skills: vibration analysis, FFT, fault signatures. Tools: accelerometer, DAQ, motor rig. Data lab, 15–45 h, $30–150.
• Shell-and-Tube Heat Exchanger Sizing — Size a shell-and-tube exchanger with LMTD and NTU methods and compare the two predictions. Skills: LMTD, effectiveness-NTU, heat transfer. Tools: Python/spreadsheet. Simulator, 15–45 h, Software only (free tools).
• 3D-Printed Compliant Mechanism — Design a flexure-based gripper with no hinges and test deflection versus force. Skills: compliant mechanisms, flexures, FEA. Tools: 3D printer, CAD, FEA. CAD / design, 15–45 h, $30–150.
• CNC Toolpath Simulator — Read simple G-code and animate the toolpath with feed-rate and machining-time estimates. Skills: G-code, toolpaths, machining time. Tools: Python/JavaScript. Simulator, 15–45 h, Software only (free tools).
• Bearing Lubrication Monitor — Track bearing temperature and vibration to decide when re-greasing is due. Skills: bearing health, lubrication, monitoring. Tools: temperature/vibration sensors. Dashboard, 15–45 h, $30–150.
• Topology-Optimized Bracket — Optimise a bracket's material layout under load, print it and compare stiffness with a solid design. Skills: topology optimisation, FEA, additive manufacturing. Tools: Fusion 360/ANSYS, 3D printer. CAD / design, 15–45 h, $30–150.
• Wind-Tunnel Drag Study — Measure drag on model shapes in a small wind tunnel and compute drag coefficients. Skills: aerodynamic drag, Reynolds number, measurement. Tools: small wind tunnel, load cell. Data lab, 15–45 h, $30–150.
• Thermal Management Enclosure — Design heatsinks and airflow for an electronics enclosure and verify with temperature logging. Skills: heat sinks, convection, thermal design. Tools: CAD, thermocouples, fan. CAD / design, 15–45 h, $30–150.
• Robotic Gripper Mechanism — Design a parallel-jaw gripper with a lead screw and measure grip force. Skills: mechanism design, lead screws, force analysis. Tools: CAD, servo/stepper. CAD / design, 15–45 h, $30–150.
• Hydraulic Circuit Trainer — Simulate hydraulic circuits with pumps, valves and cylinders and check pressures and speeds. Skills: hydraulics, valve logic, flow rates. Tools: FluidSIM-style simulation. Simulator, 15–45 h, $30–150.
• Composite Beam Test Model — Make carbon or glass fibre beams, test them in three-point bending and compare with laminate theory. Skills: composites, bending, laminate theory. Tools: fibre, resin, test jig. Hardware build, 15–45 h, $30–150.
• Manufacturing Tolerance Stack-Up — Analyse worst-case and statistical tolerance stacks for an assembly and find the critical dimensions. Skills: tolerancing, stack-up analysis, statistics. Tools: spreadsheet/Python. Data lab, 15–45 h, Software only (free tools).
• Fluid-Flow Visualization Rig — Visualise laminar and turbulent flow around objects with dye and compare Reynolds numbers. Skills: fluid flow, Reynolds number, visualisation. Tools: flow tank, dye, camera. Hardware build, 15–45 h, $30–150.
• Low-Cost Tensile Tester — Build a screw-driven tensile tester with a load cell and plot stress-strain curves of plastics. Skills: tensile testing, load cells, stress-strain. Tools: load cell, lead screw, MCU. Hardware build, 15–45 h, $30–150.
• Vehicle Suspension Model — Simulate a quarter-car suspension over road bumps and tune spring and damper values. Skills: vibration, damping, ride comfort. Tools: Python/Simulink. Simulator, 15–45 h, $30–150.
• Digital Work-Instruction Station — Guide assembly with step-by-step digital instructions, timing each step and catching skipped steps. Skills: work instructions, assembly, human factors. Tools: tablet app. Workflow, 15–45 h, $30–150.
• Machine Energy Audit Kit — Measure the energy used by a machine tool per part and find idle-time waste. Skills: energy measurement, KPIs, machining. Tools: power logger, spreadsheet. Dashboard, 15–45 h, $30–150.
• Thermoelectric Exhaust Heat Harvester — Generate electricity from a hot exhaust pipe with Peltier modules and measure output versus temperature difference. Skills: thermoelectrics, heat recovery, efficiency. Tools: Peltier/TEG modules, heat sink. Hardware build, 15–45 h, $30–150.
• Stirling Engine Build — Build a low-temperature-difference Stirling engine and measure speed versus heat input. Skills: thermodynamic cycles, heat engines, efficiency. Tools: Stirling kit, thermometer, tachometer. Hardware build, 15–45 h, $30–150.
• Pipe Network Pressure-Drop Calculator — Compute pressure drops and flows in a pipe network with fittings using Darcy-Weisbach. Skills: pipe flow, friction factors, networks. Tools: Python. Simulator, 15–45 h, Software only (free tools).
• Gear Tooth Stress Analysis — Calculate bending and contact stresses on gear teeth with Lewis and AGMA methods. Skills: gear stresses, AGMA, design checks. Tools: Python/spreadsheet. Visualizer, 15–45 h, Software only (free tools).
• Cutting Force Measurement on a Lathe — Measure cutting forces with a strain-gauge dynamometer at different feeds and depths. Skills: machining forces, strain gauges, DOE. Tools: dynamometer, DAQ. Data lab, 15–45 h, $30–150.
• Kinematic Analysis of a Slider-Crank — Compute and animate position, velocity and acceleration of a slider-crank. Skills: kinematics, slider-crank, animation. Tools: Python/JavaScript. Simulator, 15–45 h, Software only (free tools).
• Buckling of Slender Columns — Load columns of different lengths to buckling and compare with Euler and Johnson formulas. Skills: buckling, column theory, testing. Tools: column samples, load frame. Data lab, 15–45 h, Software only (free tools).
• Air Compressor Leak Survey — Find and quantify compressed-air leaks with an ultrasonic detector and estimate wasted energy. Skills: compressed air, leak detection, energy cost. Tools: ultrasonic detector, flow meter. Workflow, 15–45 h, $30–150.
• Weld Joint Strength Study — Compare fillet and butt weld strengths and relate them to design calculations. Skills: weld design, joint strength, testing. Tools: welded samples (supervised), test rig. Hardware build, 15–45 h, $30–150.

Advanced projects

• Refrigeration Cycle COP Analyzer — Measure temperatures and pressures on a small refrigerator and calculate its COP. Skills: vapour compression, COP, thermodynamics. Tools: pressure gauges, thermocouples. Data lab, 45–100 h, $30–150.
• Robust Lattice Structure Design — Design lattice infills with tailored stiffness and validate them with compression tests. Skills: lattice structures, additive design, testing. Tools: nTopology/CAD, 3D printer. CAD / design, 45–100 h, $30–150.
• Additive Manufacturing Process Planner — Choose build orientation, supports and parameters to minimise time, warping and post-processing. Skills: AM process planning, supports, optimisation. Tools: slicer, Python. Workflow, 45–100 h, Software only (free tools).
• Friction Stir Process Study — Study how rotation speed and traverse rate affect friction stir weld quality and hardness. Skills: friction stir welding, process parameters, metallurgy. Tools: FSW setup (supervised), hardness tester. Data lab, 45–100 h, Software only (free tools).
• Mechanism Synthesis Explorer — Synthesise four-bar linkages that pass through given points and animate the solutions. Skills: linkage synthesis, optimisation, kinematics. Tools: Python. Simulator, 45–100 h, Software only (free tools).
• Condition-Based Maintenance Dashboard — Combine vibration, temperature and runtime data to schedule maintenance before failure. Skills: CBM, sensor fusion, maintenance planning. Tools: IoT sensors, dashboard. Dashboard, 45–100 h, $30–150.
• CFD Study of a Pipe Bend — Simulate flow through a pipe bend and compare pressure loss with handbook correlations. Skills: CFD, turbulence models, validation. Tools: OpenFOAM/ANSYS Fluent. Simulator, 45–100 h, Software only (free tools).
• Rotor Dynamics Critical Speed Study — Predict critical speeds of a rotor and verify them on a run-up test. Skills: rotor dynamics, critical speeds, modal analysis. Tools: test rotor, accelerometers. Data lab, 45–100 h, $30–150.
• Modal Analysis of a Plate — Find natural frequencies and mode shapes by impact testing and compare with FEA. Skills: modal testing, FEA, mode shapes. Tools: impact hammer, accelerometer, FEA. Data lab, 45–100 h, $30–150.
• Design for Assembly Redesign — Redesign a product to reduce part count and assembly time using DFA scoring. Skills: DFA, product design, cost reduction. Tools: CAD, DFA worksheets. CAD / design, 45–100 h, Software only (free tools).
• Micro Gas Turbine Performance Model — Model a small gas turbine's Brayton cycle with component efficiencies and map performance. Skills: Brayton cycle, turbomachinery, performance maps. Tools: Python. Simulator, 45–100 h, Software only (free tools).
• Thermal Stress in a Brake Disc — Simulate transient temperatures and thermal stresses in a disc during repeated stops. Skills: transient thermal FEA, thermal stress, braking. Tools: ANSYS/FEA tool. Simulator, 45–100 h, Software only (free tools).
• Active Vibration Isolation Table — Isolate a platform from floor vibration using sensors and actuators in a feedback loop. Skills: active control, vibration isolation, sensors. Tools: accelerometers, voice coils, MCU. Hardware build, 45–100 h, $150+.
• Ergonomic Hand Tool Design — Design a hand tool with grip-force and wrist-angle analysis and validate with user tests. Skills: ergonomics, human factors, CAD. Tools: CAD, force sensors. CAD / design, 45–100 h, $30–150.
• Reverse Engineering With 3D Scanning — Scan a part, rebuild a parametric CAD model and compare deviations. Skills: 3D scanning, reverse engineering, metrology. Tools: scanner/photogrammetry, CAD. CAD / design, 45–100 h, Software only (free tools).
• Fluid Power Energy Recovery Circuit — Recover braking energy in a hydraulic circuit with an accumulator and measure savings. Skills: hydraulic accumulators, energy recovery, circuits. Tools: hydraulic simulation/testbed. Simulator, 45–100 h, $30–150.
• Spring-Mass Energy Harvester — Tune a cantilever energy harvester to a machine's vibration frequency and measure power. Skills: resonance, piezoelectrics, energy harvesting. Tools: piezo cantilever, shaker. Hardware build, 45–100 h, $150+.
• Injection Mould Design Study — Design a two-plate mould for a small part with gating and cooling, checked by flow simulation. Skills: mould design, gating, cooling. Tools: CAD, Moldflow-style simulation. CAD / design, 45–100 h, $30–150.
• Gearbox Efficiency Test Rig — Measure input and output torque of a gearbox and map efficiency against load and speed. Skills: gear losses, torque measurement, efficiency maps. Tools: torque sensors, motor rig. Data lab, 45–100 h, $30–150.
• Heat Pipe Performance Study — Compare heat pipes with solid copper rods for heat transport at different orientations. Skills: heat pipes, two-phase heat transfer, testing. Tools: heat pipes, heaters, thermocouples. Data lab, 45–100 h, $30–150.
• Robotic Welding Path Planner — Generate weld paths from CAD seams and simulate torch angles and travel speeds. Skills: path planning, welding, CAD/CAM. Tools: Python, CAD. Simulator, 45–100 h, Software only (free tools).
• Machining Chatter Detection — Detect chatter from sound or vibration during milling and recommend stable speeds. Skills: chatter, stability lobes, signal processing. Tools: microphone/accelerometer, Python. Data lab, 45–100 h, $30–150.
• Lightweight Drone Frame Optimisation — Optimise a drone frame for stiffness-to-weight and validate with vibration tests. Skills: structural optimisation, composites, vibration. Tools: CAD/FEA, test rig. CAD / design, 45–100 h, $30–150.
• Wear Testing With a Pin-on-Disc — Measure wear rates of material pairs and relate them to Archard's law. Skills: tribology, wear, Archard's law. Tools: pin-on-disc rig. Data lab, 45–100 h, $30–150.
• Kinetic Energy Recovery Flywheel — Design a flywheel storage system and measure energy stored versus spin-down losses. Skills: flywheels, energy storage, bearing losses. Tools: flywheel rig, motor/generator. Hardware build, 45–100 h, $150+.

Expert projects

• Cryogenic Insulation Comparison — Measure boil-off rates of liquid nitrogen in different insulated containers. Skills: cryogenics, insulation, heat leak. Tools: LN2 (supervised), scales. Data lab, 100 h+, Software only (free tools).
• Waste-Heat-to-Power ORC Concept — Size an organic Rankine cycle for low-grade waste heat and select a working fluid. Skills: ORC, working fluids, thermodynamic optimisation. Tools: Python, CoolProp. Simulator, 100 h+, Software only (free tools).
• Digital Twin of a Machine Tool — Mirror spindle load, temperatures and positions of a CNC machine to predict thermal error. Skills: digital twins, thermal error, machine tools. Tools: sensor data, simulation. Digital twin, 100 h+, $150+.
• Multiphysics Battery Pack Cooling — Simulate coupled electrical-thermal behaviour of a battery pack with liquid cooling plates. Skills: multiphysics, thermal management, CFD. Tools: COMSOL/ANSYS. Simulator, 100 h+, Software only (free tools).
• Generative Design of a Load-Bearing Part — Use generative design with manufacturing constraints and compare candidates by cost and mass. Skills: generative design, manufacturability, trade studies. Tools: Fusion 360 generative. CAD / design, 100 h+, Software only (free tools).
• Prognostics of Rolling Bearings — Predict remaining useful life from run-to-failure vibration datasets with ML. Skills: prognostics, RUL, machine learning. Tools: Python, public datasets. Data lab, 100 h+, Software only (free tools).
• Soft Robotic Actuator Design — Design pneumatic soft actuators, simulate bending and validate with prototypes. Skills: soft robotics, hyperelastic FEA, moulding. Tools: silicone moulding, FEA. CAD / design, 100 h+, Software only (free tools).
• Turbulent Jet Cooling Optimisation — Optimise impinging jet arrays for electronics cooling with CFD and experiments. Skills: jet impingement, CFD, optimisation. Tools: OpenFOAM, test rig. Simulator, 100 h+, $150+.
• Self-Sensing Smart Structure — Embed sensors in a structure to detect damage location from changes in vibration. Skills: structural health monitoring, modal changes, sensing. Tools: piezo sensors, DAQ. Data lab, 100 h+, $150+.
• Hydrogen Combustion Engine Concept — Model a hydrogen-fuelled engine cycle with NOx estimates and knock limits. Skills: combustion modelling, hydrogen, emissions. Tools: Python/Cantera. Simulator, 100 h+, Software only (free tools).
• Micro-Channel Heat Sink Study — Model laminar flow and heat transfer in micro-channels and compare channel geometries. Skills: microfluidics, conjugate heat transfer, CFD. Tools: CFD tool. Simulator, 100 h+, Software only (free tools).
• Metamaterial Vibration Absorber — Design a locally resonant metamaterial beam that blocks a target vibration band. Skills: metamaterials, band gaps, vibration. Tools: FEA, 3D printer. CAD / design, 100 h+, $150+.
• Human-Powered Vehicle Optimisation — Optimise a human-powered vehicle's aerodynamics, mass and drivetrain for a target speed. Skills: system optimisation, aerodynamics, human power. Tools: CFD, CAD. Simulator, 100 h+, Software only (free tools).
• Fatigue Testing With Digital Image Correlation — Measure strain fields during fatigue tests with DIC and track crack initiation. Skills: DIC, fatigue, crack initiation. Tools: camera, DIC software, test rig. Data lab, 100 h+, $150+.
• Sustainable Product Life-Cycle Redesign — Redesign a product to cut life-cycle emissions and justify the change with LCA. Skills: eco-design, LCA, materials selection. Tools: LCA tool, CAD. Workflow, 100 h+, Software only (free tools).
• Autonomous Inspection of Welds — Combine vision and ultrasound to classify weld defects automatically. Skills: NDT, computer vision, classification. Tools: camera, ultrasonic probe, Python. Data lab, 100 h+, $150+.
• High-Speed Spindle Thermal Compensation — Model spindle thermal growth and compensate machine position in real time. Skills: thermal compensation, modelling, machine accuracy. Tools: sensors, controller. Digital twin, 100 h+, $150+.
• Wave Energy Converter Model — Model a point-absorber wave energy device and optimise its power take-off damping. Skills: hydrodynamics, PTO, energy conversion. Tools: Python/WEC-Sim. Simulator, 100 h+, Software only (free tools).
• Bio-Inspired Gripper With Adhesion — Design a gecko-inspired dry adhesive gripper and measure grip on different surfaces. Skills: bio-inspired design, adhesion, testing. Tools: microstructured film, test rig. Hardware build, 100 h+, $150+.
• Reliability-Based Design Optimisation — Optimise a part for mass while keeping failure probability below a target. Skills: RBDO, uncertainty, optimisation. Tools: Python/FEA. Simulator, 100 h+, Software only (free tools).
• Supercritical CO2 Cycle Study — Model a recompression sCO2 power cycle and compare efficiency with steam cycles. Skills: sCO2 cycles, thermodynamics, recuperation. Tools: Python, CoolProp. Simulator, 100 h+, Software only (free tools).
• Acoustic Leak Localisation in Pipes — Locate pipe leaks by cross-correlating acoustic sensors at two points. Skills: acoustics, cross-correlation, localisation. Tools: accelerometers/hydrophones, Python. Data lab, 100 h+, $150+.
• Digital Thread for a Machined Part — Link design, CAM, inspection and in-service data for one part to trace every decision. Skills: digital thread, PLM, traceability. Tools: CAD/CAM, database. Workflow, 100 h+, Software only (free tools).
• Shape-Adaptive Morphing Wing Mechanism — Design a compliant morphing trailing edge and test its deflection and loads. Skills: morphing structures, compliance, aerodynamics. Tools: CAD/FEA, wind tunnel. CAD / design, 100 h+, Software only (free tools).
• Thermal Energy Storage With Phase-Change Material — Design and test a PCM storage unit and model its charging and discharging. Skills: phase change, thermal storage, modelling. Tools: PCM, heaters, thermocouples. Data lab, 100 h+, $150+.

Project ideas for every branch · Mechanical roadmap