CNC Machining Guides
Who Owns Your Design? Files, IP and Trust When Ordering Custom Parts
The three fears behind sending your drawing to a factory — quoting around it, copying it, losing the files — answered by the factory side, with the protections you control at each step.
Every first-time buyer hesitates at the same moment: cursor over the drawing, about to attach it, wondering who else is about to see it. The fear has three heads — your design gets quoted to your competitors, the factory copies it and sells it, or the files vanish into someone's archive forever. All three fears deserve straight answers, because the answers decide whether you get real manufacturing or keep sketching in the dark. This article is written by the factory side, and it takes your side of the table.
Fear one: your design gets quoted around
You send a drawing to three suppliers for quotes; two lose the bid. Where does your drawing go? The honest answer: a professional shop treats quote-stage drawings like incoming mail — reviewed, quoted, archived against a possible order, and never shopped around. The protection you control is behavioral: send quotes only to suppliers who answer your process questions (a shop that explains how it would machine your part has actually read it; one that forwards it blindly is the risk), and keep the distribution list short. Three real quotes from real shops beat twenty scattered inquiries — both for price quality and for drawing safety. Our own rule, published on the technical file handling policy page: your files are used for your quotation and your order, stored under your project, and removed on request if no order follows.
Fear two: the factory copies it and sells it
This fear deserves the sharpest honesty, because part of it is real and part is math. The real part: nothing stops a shop from making an extra piece on your fixtured program. The math part: a custom part for your product has value only with your product — your customers, your market, your brand. A factory selling your brackets to strangers still needs what you have: the buyers. That is why the copies you hear about in horror stories are almost always standard catalog items, not someone's custom machined part. Your protections, in order of usefulness: order from a factory whose business model is build-to-print (their customers own the designs — that is the whole model), put confidentiality in writing for serious projects (a one-page NDA is normal and welcome), and for the crown jewels, split the work: the nobody-knows-your-product-like-you-do parts stay with the supplier you have years with. What we do not do is make your part for anyone else — the policy says files are never reused across customers, and build-to-print economics are why that policy costs us nothing to keep.
Fear three: the files disappear into the void
The project pauses, the order never lands, and you want your files and your sample back. This is a contract question, and the answer should be in writing before the drawing is sent: who keeps copies, what gets deleted on request, whether your sample ships back. A policy page covers this; a supplier without an answer has answered anyway. Ask the question at RFQ stage — the reply quality tells you how the whole relationship will handle everything else you entrust to it.
If this is your first custom order
Start smaller than your fear. Send the quote-stage version: a drawing with the dimensions that matter, without the internal details you are not ready to share — enough for a real quote, not enough to build from. Ask the three questions (who sees my files, what happens on no order, do you sign NDAs). Read the answers against the policy page if there is one. Then decide. Fear that never sends a drawing protects the design and starves the business; disclosure without structure invites the story you were afraid of. The middle path is small structured steps — and factories like ours are set up to meet buyers exactly there, at a one-piece minimum if that is what the first step looks like.
If you buy for a living
Experienced buyers formalize the three heads. Distribution control: a named list of who receives the drawing, per RFQ. Paper: NDA for pre-production work, ownership of CAD and fixtures stated in the order, and the treatment of files after completion written down. Staged disclosure: quote drawings with critical dimensions omitted or watermarked, full files only to the shortlisted shop that earned them. And the quiet professional habit: repeat business is the strongest IP protection there is — a factory making money from your reorders has no incentive to jeopardize them for one sale of your bracket to a stranger.
Send the drawing — with the ground rules set
Attach the drawing and send the RFQ — with the confidentiality question asked in the same message if you want it in writing first. The policy is public, the minimum order is one piece, and the drawing review comes before any price. Your design stays yours; the parts come back to you.
