CAD drafting documents a decision. CAD design makes one. A technical drawing is the deliverable. Here's how to tell which one your project needs.
If you've gotten a "CAD drafting" quote from one shop and a "CAD design" quote from another for what feels like the same job, you're not imagining the confusion. Vendors use these terms loosely, and mixing them up wastes budget and time.
Short version: design is deciding what a part should be. Drafting is documenting what a part already is. A technical drawing is the document that comes out of that documentation step.
What each term actually means
CAD design (mechanical design, product development) is the engineering process of turning a function into geometry — wall thickness, material, how parts mate, tolerance stack-up, whether it can actually be manufactured at the cost you need. Nothing existed before the process started; the model is the output of engineering decisions, not a record of one already made.
CAD drafting is producing accurate CAD files from decisions already made. A drafter works from someone else's design intent — a 3D model, a sketch, an old blueprint, a physical part — and produces a clean, standards-compliant CAD file or drawing. It's translation, not invention: drafting can't fix a part that doesn't work, only draw it accurately.
Technical drawing isn't a discipline — it's the deliverable. It's the 2D document, built to a standard like ASME Y14.5, that specifies dimensions, tolerances, GD&T, and surface finish precisely enough for a shop or inspector to build and check the part without talking to you. A 3D model shows a machine what shape to cut. A drawing tells a human what's allowed to vary. (Some shops now accept model-based definition — tolerances embedded in the 3D file — instead of a 2D sheet, but plenty still expect the drawing, especially for first-article inspection.)
| | CAD Drafting | CAD Design | Technical Drawing | |---|---|---|---| | What it is | CAD file from a decision already made | Engineering a part from a problem | The toleranced 2D document | | You provide | A model, sketch, old drawing, or part | A requirement or rough concept | Nothing extra — it's an output | | Engineering judgment | Low — translation | High — geometry, material, DFM | None on its own | | Deliverable | Clean CAD file or drawing set | Validated 3D model, often + prototype | PDF/DWG with GD&T, BOM, title block | | Need it when | The part is known; you need a record | The part doesn't exist yet | Someone must manufacture or inspect against a spec |
How to tell which one you need
- You know what the part should do, but it's never been modeled. CAD design.
- You have a model or a real part, but nothing a shop can quote against. Drafting — specifically, a technical drawing.
- You have a physical part and no usable data at all. Reverse engineering first, usually starting with a 3D scan.
- You have an old paper or PDF drawing. CAD conversion, a specific drafting task.
- You have a design you believe works but aren't sure it's manufacturable at reasonable cost. A DFM review, layered on top of either.
Cost and turnaround
Turnaround diverges because design includes iteration and drafting doesn't. At CADmore, design work runs as fast as 24 hours for simple jobs, typically 6-8 business days for standard scope. Drafting-only work is usually faster within that same range, since there's no design loop to wait on — you're documenting settled geometry, not creating it.
Cost follows the same logic. At CADmore, straightforward drafting — 2D drawing conversions, simpler projects with clear dimensions, or file optimization for molding — runs $150–$800. Full CAD design for a new part runs $1,500–$15,000, from simpler parts to complex products, plus $6,000–$9,000 more for projects with significant electrical integration. Treat both as ballparks, not quotes.
Where this goes wrong
The most common expensive mistake — visible across the tens of thousands of projects submitted through CADmore — is ordering full design for a part that's already engineered, paying for iteration you don't need. The reverse is just as common: ordering drafting for a part that was never actually engineered, and getting a technically clean drawing of a part that doesn't assemble or can't be molded economically. Drafting documents a decision; it doesn't fix a bad one.
A third failure mode is skipping the technical drawing and sending a shop only a 3D file. That works with some shops for some parts, but most CNC and molding quotes, and nearly all first-article inspection, still expect a toleranced 2D drawing — skip it, and the vendor interprets tolerances you never specified.
Where CADmore fits
CADmore's services map onto this breakdown: reverse engineering and 3D scanning (part to CAD, from nothing), CAD conversion (legacy drawings to modern CAD), CAD drafting (finished design to manufacturing-ready drawing), product development/mechanical engineering (problem to validated design), and DFM review layered onto any of it. What CADmore doesn't do is run production — that split is deliberate. An engineer who's also selling you the tooling has a reason to spec the part their own shop runs most efficiently, not necessarily the part that's best for you. CADmore's design and drafting work goes to your manufacturer or its partner network afterward, with no internal production quota shaping the geometry. For product-development work, CADmore builds prototypes in-house to validate a design before it's frozen — that's confirmation, not a production run.
Starting from a physical part with no usable CAD data? Reverse engineering, usually starting with a 3D scan, typically takes 8-10 business days; short-range 3D scanning starts at $260.
Still not sure which of the three you need? That's a fair question for a $100 paid consultation before committing to a full engagement — or start a project and describe what you actually have, whether that's a part, a sketch, an old drawing, or just an idea. Or reply and describe what you're working on.
FAQ
Is CAD drafting the same as CAD design? No. Drafting documents a decision already made — turning a model, part, or old drawing into a standards-compliant CAD file. Design is the decision itself: engineering geometry, material, and tolerances for a problem with no solution yet. Part already works and just needs a drawing? Drafting. Starting from a problem? Design.
I already have a 3D CAD model. Do I still need a technical drawing? Usually, yes — unless your shop works from model-based definition. A model shows shape; it doesn't reliably show what's allowed to vary, like fits, surface finish, and GD&T. Most shops still quote and inspect against a 2D toleranced drawing even when they have the model.
What's the difference between reverse engineering and CAD drafting? Reverse engineering starts with a physical part and no usable data, typically beginning with a 3D scan and ending in a parametric CAD model. Drafting starts with data that already exists — a model, sketch, or old drawing — and produces a formal, dimensioned drawing.
Can I get just a technical drawing without paying for full CAD design? Yes, if the design is already done. Drafting-only service turns a finished design into a manufacturing-ready drawing without re-engineering it. If the design isn't actually finished, drafting alone won't get you a working part — you need design first.
How long does CAD design take compared to drafting? At CADmore, design work runs as fast as 24 hours for simple parts and typically 6-8 business days for standard scope, since it includes engineering iteration. Drafting-only work is typically faster within that range — you're documenting settled geometry, not creating it.
Frequently asked questions
Is CAD drafting the same as CAD design?
No. Drafting documents a decision already made — turning a model, part, or old drawing into a standards-compliant CAD file. Design is the decision itself: engineering geometry, material, and tolerances for a problem with no solution yet. Part already works and just needs a drawing? Drafting. Starting from a problem? Design.
I already have a 3D CAD model. Do I still need a technical drawing?
Usually, yes — unless your shop works from model-based definition. A model shows shape; it doesn't reliably show what's allowed to vary, like fits, surface finish, and GD&T. Most shops still quote and inspect against a 2D toleranced drawing even when they have the model.
What's the difference between reverse engineering and CAD drafting?
Reverse engineering starts with a physical part and no usable data, typically beginning with a 3D scan and ending in a parametric CAD model. Drafting starts with data that already exists — a model, sketch, or old drawing — and produces a formal, dimensioned drawing.
Can I get just a technical drawing without paying for full CAD design?
Yes, if the design is already done. Drafting-only service turns a finished design into a manufacturing-ready drawing without re-engineering it. If the design isn't actually finished, drafting alone won't get you a working part — you need design first.
How long does CAD design take compared to drafting?
At CADmore, design work runs as fast as 24 hours for simple parts and typically 6-8 business days for standard scope, since it includes engineering iteration. Drafting-only work is typically faster within that range — you're documenting settled geometry, not creating it.