How to get a 3D printing quote that comes back fast (with template)
Slow quotes are almost never the maker's fault. They're the result of a post that makes the maker ask three questions before they can open a slicer, and every question costs a day. A good brief is boring, specific and takes ten minutes to write. Here's what goes in it.
Why vague posts get bad bids
Put yourself on the other side. A maker opens a post that says "need a part printed, how much?" with one blurry photo. They have two options: ask for the file and the dimensions and wait, or bid high enough to cover whatever the part turns out to be. Neither gets you a good price.
A post with the STL attached, units stated and material named gets a bid inside a day, and the bid is tight because there's nothing left to guess.
What a maker needs to quote
- The file. STL is enough for printing. STEP is better if you have it — makers can check wall thickness and fix small problems without asking. No file? Photos plus dimensions, and say you need modeling (see the last section).
- Units. Millimeters unless you say otherwise. A 40 mm bracket exported in inches comes out 25 times too big, and yes, it happens weekly.
- Quantity, and whether you'll reorder. Ten now with fifty next quarter is a different conversation from ten and done.
- Material, or the use case. "PETG" is fine. "It holds a 2 lb camera outdoors" is better — the maker can push back if PETG isn't the right call.
- Critical tolerances. Most parts have one or two dimensions that matter and a dozen that don't. Name the ones that matter: "the 8 mm bore must fit a 608 bearing, press fit."
- Finish. Raw, supports removed, sanded, or painted. Raw is the default and the cheapest.
- Date in hand. A real date. "ASAP" gets priced as a rush; "by the 20th" gets priced as standard if the 20th is ten days out.
- Ship-to country and postcode. Makers price shipping into the bid, and a nearby maker may beat a distant one on total cost.
The template
Paste this into your post and fill it in:
Part: (what it is, what it does)
File: (STL / STEP attached — units: mm)
Quantity:
Material: (or: use case, let me know)
Critical dimensions:
Finish: raw / supports removed / sanded / painted
Need by:
Ship to: (country, postcode)
Budget (USD): $
Notes: (load, outdoors, food contact, NDA, anything else)
That's the whole thing. A maker can read it in thirty seconds and bid in five minutes.
Three mistakes that slow everything down
Attaching a screenshot of the model instead of the model. A picture of a CAD window tells the maker what the part looks like and nothing about its size. Export the STL; every CAD tool does it in two clicks.
Asking for "the strongest material." The strongest material for a bracket is machined steel, and you don't want that quote. Say what load the part sees and let the maker match a plastic to it — usually PETG or nylon, and much cheaper.
Posting the same job twice with different details. Makers see both, don't know which is current, and wait for you to sort it out. Edit the original post instead.
Give a real budget
People leave the budget blank because they think a number caps what they'll get. It's the opposite. A budget tells makers whether the job is worth their time and what level of finish you're expecting. "Under $25" for a PLA bracket brings in the farm operators who do that all day. "$75–250" for the same bracket confuses everyone. The price guide has ranges by material and example parts so you can pick a band that fits.
When you don't have a file
Say so in the first line. Upload photos of the part from three sides, put a ruler or a coin in one of them, and list the dimensions you can measure. Say what the part attaches to. Makers who offer modeling will quote the STL separately — typically $20–80 for a simple mechanical part — and send it to you for approval before printing. You keep the file afterward, so the second time the part breaks it's a straight reprint.
What happens after you post
On The Spool List makers reply with a price and a turnaround. You compare bids, check their completed jobs and reviews, and accept one. That's when you pay — not before. The platform holds the payment and releases it to the maker when you confirm the part arrived.
Ready? Post your part. Free to post, and the template above is all you need.