Project: A complete part and assembly drawing
Produce a manufacturing-quality part drawing of a bracket and a simple assembly drawing with a bill of materials, checked against a drafting standard.
By the end of this project you will
- Choose views and sections to define a part fully
- Dimension and tolerance functionally
- Complete a title block and notes to a standard
- Produce a matching assembly drawing and BOM
Project brief
Objective
Produce a standards-compliant part drawing and an assembly drawing with BOM that a workshop could manufacture and assemble from.
The brief
A steel mounting bracket: an L-shaped plate (8 mm thick) with two mounting holes in the base, a bored hole in the upright for a 20 mm shaft with a bearing, and a stiffening rib. Choose one drafting standard (ISO/national or ASME) and one projection system, and state both.
Step 1 — Views
- 1Choose the front view and required additional views.
- 2Add a section through the bore; don't section the rib lengthwise.
- 3Add an auxiliary view if you include an angled face.
Step 2 — Dimensions and tolerances
- 1Choose datums from how the bracket mounts.
- 2Dimension all features once, baseline from datums.
- 3Tolerance the bore for the bearing fit (look up the fit), and give the mounting holes a position tolerance or ± tolerances.
- 4Add a general tolerance note and surface finish where needed.
Step 3 — Sheet
- 1Complete the title block: part name, number, material, finish, scale, projection symbol, units, tolerances, drawn/checked.
- 2Add notes: break sharp edges, finish, deburr.
- 3Check lines, lettering and legibility at print size.
Step 4 — Assembly
- 1Draw the assembly of bracket, shaft, bearing and fasteners in section.
- 2Balloon items and add a BOM with standard designations for fasteners and the bearing.
- 3Add an exploded view if helpful.
Deliverables
Hand in (or keep for your portfolio) the following. Each item maps to a checklist line below.
| Deliverable | Format | What it proves |
|---|---|---|
| Part drawing | A3 PDF | The part is fully defined to a stated standard |
| Assembly drawing with BOM | A3 PDF | Parts and quantities are traceable |
| Fit calculation | Short note | Tolerances were chosen, not guessed |
| Workshop questions log | List | The drawing was tested for clarity |
Common mistakes
Tolerancing every dimension tightly.
Use a general tolerance and tighten only functional features.
Choosing datums that don't match how the part mounts.
Base datums on the mounting face and locating features.
Your task
Manufacturability check
- Swap drawings with someone (or re-read after a day) and try to write the machining steps from the drawing alone.
- Record every question you'd need to ask — each is a drawing fix.
You should end up with: A drawing that answers the workshop's questions.
Completion checklist
0 of 6 checked · saved on this device
Project quiz
The bore for a bearing needs a specific fit tolerance.
Finished this project?
Taking the quiz marks it complete too. Your course page picks up where you stopped.
Free KitWren tools that help
- Length ConverterConvert between metres, centimetres, millimetres, kilometres, inches, feet, yards and miles.
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- Fraction CalculatorAdd, subtract, multiply and divide fractions, with the answer simplified and shown as a mixed number and decimal.
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