Is FDM or SLA stronger?

FDM is stronger for most working parts. The melted plastic layers hold weight and take stress well. Standard SLA resin can turn brittle and crack under a hard drop or heavy load, though some tough resins help.

Which is cheaper, FDM or SLA?

FDM is cheaper for most parts. The plastic costs less, and finished parts need no wash step. SLA resin costs more per part and needs an alcohol wash and a UV cure after printing.

When should I choose SLA over FDM?

Choose SLA when your part needs very fine detail or a smooth finish. SLA hardens thin resin layers, so small text, sharp edges, and curves come out crisp. It fits miniatures, dental models, and jewelry patterns.

What method does your shop use?

We print with FDM, and your order is made by Slant 3D in the USA. FDM gives strong, low-cost parts for everyday use. Send us your file and what the part needs to do, and we will help you pick the right setup.

Guide

FDM vs SLA: how to pick the right 3D printing method

FDM melts plastic and stacks it in layers, while SLA uses light to harden liquid resin. That is the core split in the FDM vs SLA debate. FDM parts are tough and cheap and great for working parts. SLA parts are smooth and sharp and great for fine detail. We print with FDM, and our orders are made by Slant 3D in the USA.

What FDM and SLA actually mean

FDM stands for fused deposition modeling. A hot nozzle melts a plastic string and lays it down line by line. Each layer cools and bonds to the one below it. This is the most common kind of 3D printing.

SLA stands for stereolithography. A light source aims at a tray of liquid resin. The light hardens the resin one thin layer at a time. The part is pulled up out of the tray as it builds.

So FDM builds with melted plastic. SLA builds with hardened resin. That one difference shapes how each part looks, feels, and holds up.

Strength: FDM wins for working parts

FDM parts are stronger for most real-world jobs. The melted plastic forms solid layers that hold weight and take stress. Think brackets, clips, mounts, and tool holders.

SLA parts can be sharp and stiff, but many resins turn brittle over time. They can crack under a hard drop or a heavy load. Some tough resins help, but standard resin is not built for daily abuse.

If your part needs to bend, snap, or carry weight, FDM is the safer pick. That is why we print working parts with FDM.

Detail and finish: SLA wins for fine work

SLA prints finer detail than FDM. Light can harden very thin layers, so small features come out crisp. Tiny text, smooth curves, and sharp edges look clean.

FDM layers are thicker, so you can often see and feel the lines. You can sand or smooth FDM parts, but it takes extra work. For most working parts, those lines do not matter.

SLA shines for things like miniatures, dental models, and jewelry patterns. If your part is all about looks and tiny detail, SLA is worth a look.

Cost and cleanup: FDM is simpler

FDM costs less to run and clean up. The plastic is cheap, and finished parts come off ready to use. There is no messy wash step.

SLA resin costs more per part. Each print needs a wash in alcohol and a cure under UV light. The liquid resin is sticky and needs gloves and care.

For most orders, FDM gives you a strong part at a lower price with less hassle. That fits how we work.

How to choose for your project

Pick FDM when your part needs to be strong, cheap, and ready to use. Most brackets, housings, jigs, and everyday parts fit here. This is our process.

Pick SLA when your part needs very fine detail or a smooth glassy finish. Miniatures, models, and small display pieces fit here.

Not sure which one fits? Send us your file and what the part needs to do. We print with FDM, and your order is made by Slant 3D in the USA.

Quick takeaways

FDM melts plastic in layers. SLA hardens liquid resin with light.
FDM parts are stronger and cheaper, so they fit most working parts.
SLA parts have finer detail and a smoother finish, so they fit miniatures and models.
FDM has no wash step. SLA needs an alcohol wash and a UV cure.
We print with FDM, and orders are made by Slant 3D in the USA.

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Common questions

Is FDM or SLA stronger?: FDM is stronger for most working parts. The melted plastic layers hold weight and take stress well. Standard SLA resin can turn brittle and crack under a hard drop or heavy load, though some tough resins help.
Which is cheaper, FDM or SLA?: FDM is cheaper for most parts. The plastic costs less, and finished parts need no wash step. SLA resin costs more per part and needs an alcohol wash and a UV cure after printing.
When should I choose SLA over FDM?: Choose SLA when your part needs very fine detail or a smooth finish. SLA hardens thin resin layers, so small text, sharp edges, and curves come out crisp. It fits miniatures, dental models, and jewelry patterns.
What method does your shop use?: We print with FDM, and your order is made by Slant 3D in the USA. FDM gives strong, low-cost parts for everyday use. Send us your file and what the part needs to do, and we will help you pick the right setup.