---
title: "FDM 3D Printing Service | Fast, Low-Cost Prototypes | OpenSpindle"
description: "Get quotes for FDM and FFF 3D printed parts from independent shops. Fast, low-cost prototypes, jigs, and rugged end-use parts in PLA, ABS, PETG, nylon, and more."
canonical: https://openspindle.com/capabilities/fdm-3d-printing
---

# FDM 3D printing from independent shops

Fused deposition modeling extrudes molten thermoplastic layer by layer, the workhorse for functional prototypes, jigs and fixtures, and rugged low-cost parts. Materials range from PLA and ABS to PETG, nylon, polycarbonate, and carbon-fiber blends. Upload a model and hear back from FDM shops.

## FDM shops on OpenSpindle

Real shops running filament printers, from desktop to industrial. See their equipment and get a competitive quote for your project.

[Browse all 3D printing shops](https://openspindle.com/manufacturers?capability=3D%20printing)

## How to design for FDM 3D Printing

FDM is the cheapest and most accessible additive process. Design around the layers and supports and it prints reliably.

| Design rule | Typical spec | Why |
| --- | --- | --- |
| Typical tolerance | +/- 0.5% (min +/- 0.5 mm) | Layer-based; tighter with a tuned machine. |
| Min wall thickness | 0.8 to 1.0 mm | At least two perimeter passes for a solid wall. |
| Min feature size | ~2x nozzle (0.8 mm) | Below the nozzle width, detail is lost. |
| Max unsupported overhang | <= 45 deg from vertical | Steeper overhangs need support material that leaves marks. |
| Layer / Z strength | weaker between layers | Orient the part so loads run along layers, not across them. |
| Clearance for fits | 0.3 to 0.5 mm | Tighter gaps fuse mating parts together. |

Typical values; a shop confirms against its printer, nozzle, and material.

## FDM vs other 3D printing processes

When another process fits better than filament printing.

| Process | Best for | Typical volume | Choose it over FDM 3D Printing when |
| --- | --- | --- | --- |
| [SLS](https://openspindle.com/capabilities/sls-3d-printing.md) | Stronger, complex parts, no supports | Low-volume production | You need near-isotropic strength or complex geometry FDM cannot support. |
| [SLA / Resin](https://openspindle.com/capabilities/resin-3d-printing.md) | Fine detail, smooth cosmetic finish | Prototype | You need crisp detail or a smooth surface FDM layer lines cannot give. |
| [CNC Machining](https://openspindle.com/capabilities/cnc-machining.md) | Tight tolerance, engineering materials | Prototype to production | You need tight tolerances or full engineering-grade material properties. |
| [Injection Molding](https://openspindle.com/capabilities/injection-molding.md) | High-volume identical plastic parts | 1,000+ | You are past a few hundred parts and can amortize a mold. |

## Industries Served

- Robotics & automation
- Consumer products
- Education & research
- Industrial / OEM
- Drones & UAV

FDM is the default for fast, low-cost prototypes and shop-floor tooling.

## Frequently Asked Questions

### What is FDM 3D printing?

FDM (fused deposition modeling), also called FFF, builds a part by extruding molten thermoplastic filament layer by layer. It is the most common and lowest-cost 3D printing process, good for prototypes, jigs and fixtures, and rugged functional parts.

### What materials does FDM use?

Common FDM materials include PLA for cheap concept models, ABS and ASA for tough housings, PETG for chemical resistance, nylon for wear parts and living hinges, polycarbonate for heat and strength, TPU for flexible parts, and carbon-fiber nylon for stiff structural parts.

### What tolerance can FDM hold?

Typical FDM tolerance is about +/- 0.5% of the dimension, with a minimum of roughly +/- 0.5 mm. It is the loosest of the common additive processes; for tighter tolerances consider SLS, resin, or machining.

### FDM vs SLS: which should I use?

Use FDM for the lowest cost, large parts, and quick iterations. Use SLS when you need stronger, near-isotropic parts, complex geometry with no supports, or small production batches. SLS parts are more uniform; FDM is cheaper.

### How strong are FDM parts?

FDM parts are strong along the layers but weaker between them (the Z direction), so orientation matters. Engineering filaments like nylon, polycarbonate, and carbon-fiber blends give functional strength; design and orient the part for the load path.

## Other Capabilities

- [SLS 3D Printing](https://openspindle.com/capabilities/sls-3d-printing.md)
- [3D Printing (overview)](https://openspindle.com/capabilities/3d-printing.md)
- [CNC Machining](https://openspindle.com/capabilities/cnc-machining.md)
- [Injection Molding](https://openspindle.com/capabilities/injection-molding.md)

## Get FDM 3D printing quotes

Upload a model and compare quotes from independent FDM shops.