Print time and delivery time are two different numbers — and both matter. A single FDM part can physically print in 3 hours, but a service bureau's queue, post-processing, and shipping add 2–5 days on top. Here's how to read both numbers for each technology so you can plan your project timeline accurately.
Quick Reference: 3D Printing Times by Technology
| Technology | Machine Print Time | Post-Processing | Typical Bureau Lead Time | Rush Available? |
|---|---|---|---|---|
| FDM | 2–18 hours | 30 min (support removal) | 2–4 business days | Yes (same-day at many shops) |
| SLA / Resin | 1–8 hours | 1–2 hours (wash + cure) | 2–4 business days | Yes (next-day common) |
| SLS / MJF Nylon | 8–24 hours (build cycle) | 12–24 hours (cool + depowder) | 4–7 business days | Limited (5-day minimum common) |
| Metal (DMLS) | 12–48 hours | 3–5 days (stress relief, machining) | 7–14 business days | Rare, expensive |
What Actually Drives Print Time
Print time is driven by a handful of variables that compound. Understanding them helps you know which decisions have the biggest impact when you're trying to hit a deadline.
Part size and volume
Larger parts take longer — but the relationship isn't linear. A part that's twice as tall takes roughly twice as long to print, because layer count doubles. A part that's twice as wide or deep may not take much longer if the printer can print both areas simultaneously. The main constraint is build height: tall parts are slow, wide parts less so.
Layer height
For FDM, cutting layer height from 0.2mm to 0.1mm doubles the number of layers — and roughly doubles print time. Fine layers look better and capture more detail, but for structural parts where appearance doesn't matter, 0.2mm or 0.3mm is usually the right choice. SLA is less sensitive because masked SLA (MSLA) cures an entire layer at once regardless of layer thickness.
Infill density
FDM parts are printed hollow by default with a lattice infill inside. Standard infill (15–20%) adds minimal time. High infill (50–80%) for strength-critical parts can add 30–60% to print time. Solid infill (100%) is rarely necessary and nearly doubles print time compared to standard settings.
Support structures
Overhanging geometry requires support material that's printed and then removed. Supports add print time twice — once to print them, once to remove them. FDM with soluble support (PVA) is slower to print but eliminates manual removal. SLS and MJF require no support structures at all, which is one of their main practical advantages over FDM and SLA.
Quantity
For FDM, printing 10 identical parts takes roughly 10x as long as one (unless you can fill a build plate). For SLS and MJF, multiple parts can share a build volume — 50 small parts in one build cycle costs the same time as 5. This is why powder-bed processes become economical at higher quantities.
FDM Print Times in Practice
FDM is the fastest option for most standard-sized parts. A typical bracket or enclosure (100×80×60mm) prints in 3–6 hours at standard quality. Phone-sized parts go in 1–2 hours. Large parts like drone frames or automotive fixtures can run 12–18 hours.
High-speed FDM machines (CoreXY with input shaping, running at 400–600mm/s) have changed the math at modern service bureaus. What used to take 10 hours now takes 4–5 without meaningful loss in dimensional accuracy for most part geometries. Same-day FDM service is genuinely available in most major US cities.
If you're not planning to paint or display the part, ask for 0.2mm layers and 15% infill. You'll cut print time by 30–40% with no impact on functional performance for most brackets, fixtures, and enclosures.
SLA / Resin Print Times in Practice
MSLA (the most common modern resin process) is surprisingly fast for small, detailed parts. Layer cure time is measured in seconds, and since each layer is exposed simultaneously, print height — not geometry complexity — determines time. A 100mm tall part might take 4–5 hours regardless of whether it's a simple cylinder or an intricate lattice structure.
The real time cost with SLA is post-processing: parts must be washed in IPA (15–30 minutes), then post-cured under UV (15–60 minutes depending on resin). Bureaus account for this in their lead times. Expect 2–3 business days as a baseline for resin orders, and 1 business day from shops that offer rush service.
SLS and MJF: The Build Cycle Constraint
Powder-bed processes (SLS, HP MJF) work differently from FDM and SLA. Parts are built inside a bed of nylon powder — the laser or fusing agent works through the full build volume layer by layer. When the build is done, the entire bed must cool slowly before anyone can touch it. That cooling phase alone takes 12–24 hours.
After cooling, parts are removed from the powder bed, blasted clean, and inspected. The minimum realistic turnaround for SLS or MJF — even with a bureau that runs parts immediately — is 3–4 business days. Most quote 5–7. Rush service exists but it's uncommon and expensive, because the build cycle can't be meaningfully compressed.
The silver lining: bureaus batch multiple customers' parts into a single build. Your 10 brackets share a build volume with other orders, so you're not paying for idle machine time. This shared-build model also means adding more parts to an order often doesn't increase lead time — they just get nested into the same build.
Metal 3D Printing: Plan for Two Weeks
Metal printing (DMLS, SLM, binder jetting) has the longest cycle of any technology. The machine print time for a medium-sized metal part runs 12–36 hours. After printing, parts are still fused to a build plate and must be stress-relieved in a furnace — a multi-hour heat treatment cycle — before they can be cut free and post-processed.
Depending on the part, post-processing can include: support removal, heat treatment, surface machining of critical features, HIP (hot isostatic pressing) for dense microstructure, and inspection. Bureaus typically quote 10–15 business days for standard metal orders. Aerospace and medical parts with tighter spec requirements can take longer.
If you're ordering metal parts, build your project timeline around 3 weeks from file submission to parts in hand. For prototyping, consider whether an FDM part in a metal-like material (ASA, carbon-fiber PETG, Onyx) could validate the design before committing to a metal print.
How to Get Parts Faster
Pick the right technology for the timeline. If you need something in 24 hours, SLS and metal are off the table. FDM and SLA bureaus with rush options are your only realistic paths.
Submit a clean file. File errors — non-manifold geometry, incorrect units, missing wall thickness — cause bureaus to contact you for corrections. That back-and-forth can add a day or two. See our file preparation guide for what to check before you submit.
Ask about queue position. Many bureaus will tell you where they are in the queue if you call. Sometimes a job submitted Monday starts printing that evening; sometimes it waits until Wednesday. Bureaus with real-time online quoting often show current lead times on their website.
Request rush service explicitly. Most bureaus don't advertise rush pricing prominently, but they'll accommodate it if you ask. Expect a 25–50% premium for next-day FDM or SLA. It's worth it when a deadline matters.
Order multiples in one batch. If there's any chance you'll need more than one, order them together. Rerunning a second batch means another full lead time cycle. Bureaus often discount unit cost slightly for multiples, and you only pay the setup and shipping overhead once.
Frequently Asked Questions
A small part (roughly phone-sized or smaller) typically prints in 1–3 hours on FDM or SLA. At a service bureau, factor in queue time, post-processing, and shipping: 2–3 business days is realistic for standard service, same-day or next-day for rush.
Yes — for FDM parts, same-day service is available at many local bureaus and makerspaces in larger US cities. Submit your file in the morning and you can often pick up or receive parts by end of day. SLA same-day is less common but available. SLS, MJF, and metal cannot physically complete same-day due to build and post-processing cycles.
Yes to both. Finer layers (0.1mm on FDM) capture more detail and produce smoother surfaces, but print time roughly doubles compared to standard 0.2mm layers. For parts where appearance doesn't matter, 0.2mm is the standard choice. Most bureaus default to 0.2mm unless you specify otherwise.
The mandatory cooling phase. After an SLS or MJF build completes, the powder bed must cool slowly and uniformly — typically 12–24 hours — before parts can be safely removed. Rushing this causes warping. This cooling period is unavoidable and accounts for most of the lead time difference versus FDM or SLA.
Standard ground shipping adds 3–5 days. Overnight shipping from the bureau gets parts to you the next day after they're ready, which can cut total lead time by 2–3 days versus ground. For time-sensitive orders, combine rush production with overnight shipping and communicate both requirements explicitly when you place the order.
Find Fast 3D Printing Services Near You
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