Mechanical Drafting Services

Our mechanical drafting service covers the full path from a design intent or rough sketch through to production-ready documentation. That includes 2D mechanical drafting for parts and assemblies, 3D CAD modelling for design validation and downstream use, and the manufacturing paperwork — fabrication drawings, assembly drawings, BOMs and revision-controlled drawing sets — that a workshop or fabricator actually works from when they pick up a job.

We work from your existing standards and title blocks where they exist, or set up a clean, consistent drawing standard where they don't. Models and drawings are delivered in the native format your team uses, so they slot into your existing CAD environment rather than sitting outside it as an orphaned file nobody can edit six months later. That matters more than it sounds — a beautifully drafted part that arrives in a format your team can't open or maintain is not actually useful documentation, it's a liability disguised as a deliverable.

This service also covers reverse engineering: producing an accurate 3D model and drawing set from a physical part, a legacy 2D drawing, or a scanned reference, for design changes, spare parts, or requalifying an undocumented component. Reverse engineering work is judged differently to greenfield design — the goal isn't to redesign the part, it's to capture what actually exists, including the tolerances and fits that made the original assembly work, so a replacement or modified version behaves identically in service.

Sheet metal work is a large part of what comes through this service. Flat pattern development, bend allowance calculation and nesting-ready DXFs are only useful if they match how your press brake and material actually behave — a flat pattern that looks correct on screen but doesn't account for your shop's specific K-factor or tooling will cost you scrap and rework on the first run. We confirm these parameters with you (or use sensible defaults, clearly flagged, if they're not supplied) rather than guessing.

Assembly documentation is treated as its own discipline, not an afterthought bolted onto part drawings. A BOM that doesn't match the model, or an assembly drawing that doesn't call out the fasteners a purchasing team actually needs to order, causes far more delay on a real production line than a slightly-off dimension on a single part. We build BOMs directly from the model structure so they stay synchronised as a design evolves, rather than maintaining a parallel spreadsheet that quietly drifts out of date.

For teams running lean or contract manufacturing, we also handle the handover documentation a second supplier needs to pick up a part cold — clear revision history, material and finish call-outs, and drawings that don't assume tribal knowledge the original team had in their heads but never wrote down. That kind of documentation is what actually protects a design when the person who created it moves to a different project or a different company.

One of the more common quality failures we see in inherited drawing sets isn't a wrong dimension — it's an ambiguous one. A dimension with no clear datum reference, a note that says 'match existing' without specifying which existing, or a tolerance block that's technically present but doesn't actually reflect what the part needs to function, all create the same downstream problem: a fabricator has to guess, or call back to ask, and either outcome costs time. We draft with the fabricator's actual questions in mind, not just the geometric requirement.

Drawing checking on our end isn't a single pass at the end — dimensions are cross-checked against source material as modelling proceeds, so an error gets caught while it's cheap to fix rather than after an entire drawing set has been built around a wrong assumption. This matters most on larger assemblies, where a single incorrect reference dimension early in the process can propagate into a dozen dependent drawings if it isn't caught immediately.