FDM 3D Printing
Cost-effective thermoplastic printing for large prototypes, fixtures, jigs, housings, and engineering parts.
Large partsABS / ASA / PC
Custom 3D Printing Service
Fast prototypes, functional parts, and low-volume production.
Plastic, resin, nylon, and metal 3D printing support.
Fast
Prototype turnaround
5+
Printing processes
ISO 9001
Quality system
What is 3D Printing?
An additive process for fast, flexible custom parts.
3D printing builds parts layer by layer from 3D CAD data. It is widely used for rapid prototyping, product development, functional testing, visual models, production aids, and low-volume custom parts.
Fengnuo supports 3D printing projects from early design review to finished parts. Our team helps select the right process, material, surface finish, and inspection plan based on geometry, tolerance needs, order quantity, and application risk.
3D Printing Processes
Processes for prototypes, functional parts, and complex geometry.
Different 3D printing processes produce different surface quality, strength, accuracy, material performance, cost, and lead time.
SLA 3D Printing
High-detail resin printing for smooth surfaces, appearance models, transparent parts, fine features, and fit checks.
Smooth surfaceFine details
SLS 3D Printing
Powder-bed nylon printing for strong functional prototypes, clips, hinges, housings, brackets, and assemblies.
Functional nylonNo support marks
MJF 3D Printing
Efficient nylon printing for strong, detailed, and repeatable plastic parts, prototypes, and production batches.
Batch partsPA12
Metal 3D Printing
Metal additive manufacturing for complex parts, lightweight structures, internal channels, and advanced prototypes.
Complex metalReview required
Post-Processing & Assembly
Sanding, painting, dyeing, vapor smoothing, polishing, threaded inserts, tapping, bonding, and simple assembly.
Cosmetic finishAssembly support
Sizes & Tolerances
Practical guidelines for 3D printed parts.
3D printing tolerances are process-dependent. Final accuracy is affected by material, machine type, part size, wall thickness, build orientation, support strategy, and post-processing.
| Item | Practical Guideline |
|---|---|
| Maximum part size | Feng Nuo can accommodate 3D printing up to 24" x 36" x 36" without the need to split and bond parts. |
| Minimum feature size | 0.030" - 0.060" is typical. |
| Minimum wall thickness | 0.020" - 0.060" is typical. |
| Clearance between features | At least 0.030" |
| General tolerance | Avoid applying one universal tolerance. SLA, SLS, MJF, FDM, resin, nylon, and metal printing all have different achievable tolerances. |
| Inspection | Dimensional reports can be provided when drawings define critical features and the selected process can support the requested tolerance. |
3D Printing Materials
Materials for visual models, functional prototypes, and production parts.
Plastic & Resin Materials
PA12 / PA11 Nylon
Glass-Filled Nylon
ABS / ASA
PLA / PETG
PC
TPU / TPE
Standard Resin
Tough / Clear Resin
Metal & Engineering Options
Stainless Steel
Aluminum
Titanium
Tool Steel
High-Temp Resin
Flexible Resin
Carbon-Filled Nylon
ULTEM Options
Surface Finishes
Finish options for appearance, texture, color, and assembly.
As Printed
Fastest and most cost-effective option for prototypes, internal test parts, jigs, and fixtures.
Sanding
Reduces visible layer lines and prepares parts for painting or cosmetic finishing.
Painting
Improves appearance and supports color matching for product samples and presentation models.
Dyeing
Common for nylon powder-bed parts where consistent color is needed without paint thickness.
Vapor Smoothing
Can improve surface smoothness and reduce porosity for selected thermoplastic parts.
Polishing
Used for selected resin or transparent parts where a clearer or smoother surface is required.
Plating
Adds metallic appearance or functional coating for selected printed parts.
Threaded Inserts
Improves assembly strength and repeatability for screws and fasteners.
Design Guidelines
Design for the selected process, not for 3D printing in general.
A few early design decisions can reduce cost, shorten lead time, and avoid rework.
Choose the process early
Wall thickness, feature size, holes, clearance, and surface quality vary by FDM, SLA, SLS, MJF, and metal printing.
Use realistic wall thickness
Thin walls may warp, crack, collapse, or fail during cleaning and finishing.
Add assembly clearance
Printed parts need practical spacing, especially for moving parts, snap-fits, and post-processed parts.
Plan post-processing
Painting, sanding, smoothing, polishing, plating, dyeing, and inserts can change final dimensions.
Advantages of 3D Printing
- Fast design iteration without tooling.
- Suitable for prototypes and low-volume custom parts.
- Complex geometry, lightweight structures, and internal channels are easier to produce.
Things to Consider
- 3D printing is not always the best choice for tight-tolerance production parts.
- Surface texture, layer lines, and mechanical strength vary by process and orientation.
- Large parts may require splitting, bonding, or special post-processing planning.
Applications
3D printed parts for product development and engineering teams.
Concept Models
Fast visual models for design review, shape validation, and product presentations.
Rapid Prototypes
Functional or semi-functional prototypes for design iteration, fit checks, and engineering testing.
Low-Volume Production
Custom parts, bridge production, replacement parts, and small-batch components without tooling.
Jigs & Fixtures
Production aids, assembly fixtures, inspection tools, drill guides, and handling tools.
Electronics & Robotics
Enclosures, buttons, cable guides, brackets, sensor mounts, grippers, and lightweight structures.
Automotive & Industrial
Interior models, ducts, clips, covers, fixtures, handles, and equipment components.
3D Printing FAQ
Answers before you send 3D files.
What files do you need for a 3D printing quote?
STL, STEP, OBJ, 3MF, IGES, or other 3D files are helpful. A 2D drawing is recommended when tolerances, threads, inserts, finishes, or critical dimensions are required.
What tolerances can 3D printing achieve?
Tolerance depends on process, material, part size, geometry, build orientation, and post-processing. Critical dimensions should be marked on drawings for review.
What is the minimum wall thickness for 3D printed parts?
A typical minimum wall thickness range is 0.020" - 0.060". Functional parts may need thicker walls depending on process, material, part size, and whether the wall is supported.
Which 3D printing process should I choose?
Use FDM for cost-effective thermoplastic parts, SLA for smooth detailed models, SLS or MJF for strong nylon functional parts, and metal 3D printing for complex metal components.
Can 3D printed parts be used as end-use parts?
Yes, when the selected material, process, geometry, load, and environment match the application. Functional parts should be reviewed before production.
Can you make clear or transparent parts?
Clear resin printing is possible, but transparency depends on material, geometry, polishing, coating, and finishing requirements.
Get a 3D Printing Quote
Get 3D printing pricing and engineering feedback within 24 hours.
Send CAD files, drawings, material, finish, quantity, tolerance requirements, and lead time. Fengnuo will review printability and provide a practical quote.
Secure File Upload
Send STL, STEP, OBJ, 3MF, IGES, and PDF drawings.
Engineering Review
We review geometry, material, process, tolerance, and finish needs.
24-Hour Quote
Receive practical pricing and manufacturing guidance fast.
All uploads are secure and confidential