Francis Ugochukwu Onwualu
Portfolio projects

Compact Reduction Gearbox

2026Portfolio demonstrationMechanical design study

Project Overview

Objective

Explore how a gear pair, supported shafts, bearings, and housing interfaces fit together in a maintainable reduction gearbox concept.

Role & Responsibilities

Independent portfolio study focused on geometry, documented inputs, and engineering review.

  • Set the transmission ratio and locate input and output shafts.
  • Build the gears and arrange the bearing supports.
  • Define housing walls and maintenance access around the moving components.

Engineering Features

Stages
1
Gear ratio
2:1
Shaft centre distance
60 mm
Gear face width
12 mm
Housing
Representative open case

Tools & Software

Mechanical assembliesParametric CADDesign review

Outcome

Assembly layout and component-interface review.

A documented portfolio demonstration. Manufactured or externally validated performance is not claimed.

3D Model

Drag to rotate. Use the viewer controls to inspect the assembly from another angle.

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Drawings

Front, side, top, and isometric views of the portfolio geometry. Select the sheet to view it in detail.

Assembly drawingOrthographic geometry views with nominal study dimensions. Concept drawing, not a manufacturing release.
ParameterNominal study input
Stages1
Gear ratio2:1
Shaft centre distance60 mm
Gear face width12 mm
HousingRepresentative open case

Source & Engineering Notes

Model Assumptions

One spur-gear reduction stage with nominal 60 mm shaft-centre spacing. Housing, bearing rings, shoulders, and fasteners are simplified CAD representations; no rated motor or load is assigned.

Design Workflow

  1. Set the transmission ratio and locate input and output shafts.
  2. Build the gears and arrange the bearing supports.
  3. Define housing walls and maintenance access around the moving components.
  4. Review assembly order, shaft clearances, and component interfaces.
  5. Document the outstanding load, tolerance, and lubrication requirements.

Engineering Checks

Inspect geometric clearances and component alignment. A real gearbox also requires verified bearing life, tooth loading, shaft strength, fits, heat rejection, and lubrication design.

Study Limitations

New 2026 concept assembly. No manufactured gearbox, durability test, or professional gearbox commission is claimed.