ISO 9001 & AS9100 Certified 3D Printing Facility
Custom 3D Printing Services
The best custom 3D printing services and online 3D printing service providers combine multiple additive manufacturing technologies, engineering-grade materials, and fast turnaround with transparent pricing. At Baetro, we offer FDM, SLA, SLS, MJF, and DMLS 3D printing services across 20+ materials — with free DfAM (Design for Additive Manufacturing) review on every quote, parts shipping in 3–7 days, and no minimum order quantity.
From functional prototypes to end-use production parts, our Qingdao facility delivers precision additive manufacturing with instant quotes, engineering-grade materials, and full post-processing capabilities — all under one roof.
3–7 days
Standard lead time
20+
Engineering materials
Free DfAM
On every quote
MOQ 1
Prototype to production
3D Printing Fundamentals
What Is Custom 3D Printing?
Custom 3D printing is an additive manufacturing process that builds parts layer by layer from digital CAD files. Unlike subtractive methods that remove material from a solid block, 3D printing creates geometries by depositing, curing, or sintering material precisely where it is needed. This means complex internal channels, lattice structures, and organic shapes that would be impossible to machine become routine.
At Baetro, we operate five distinct 3D printing technologies across our ISO-certified facility in Qingdao. Every quote includes a free DfAM review where our engineers evaluate your design for printability, suggest orientation improvements, and recommend the best technology and material for your application. We do not just price your part — we optimize it.
Layer-by-Layer Build
Additive process creates complex geometries from digital designs
Complex Geometries
Internal channels, lattice structures, and organic shapes
Multiple Technologies
FDM, SLA, SLS, MJF, and DMLS — five distinct processes
Free DfAM Review
Engineers optimize every design for printability and cost
Five Technologies, One Partner
FDM, SLA, SLS, MJF, and DMLS — instant quotes, free DfAM, parts in 3–7 days.
3D Printing Capabilities
Custom 3D Printing Technologies We Offer
Choosing the right technology is the single most important decision in a custom 3D printing project. Each process has distinct strengths in resolution, material options, strength, surface finish, and cost. Here is how Baetro's five technologies compare.
FDM 3D Printing
FDM 3D Printing
FDM 3D printing extrudes thermoplastic filament through a heated nozzle, building parts layer by layer. It is the most affordable and fastest option for functional prototypes and concept models.
- Best for: Functional prototypes, concept models, low-cost parts, jigs and fixtures
- Materials: ABS, PLA, PETG, nylon, TPU
- Tolerances: ±0.005 inch or ±0.005 mm/mm
- Layer height: 0.005–0.013 inch (0.127–0.33 mm)
- Lead time: 3–5 days
- Surface finish: Matte with visible layer lines
- Build volume: Up to 300 × 300 × 400 mm
FDM parts are durable and suitable for form-and-fit testing. However, layer lines are visible, and tolerances are looser than SLA or SLS. For parts that will be handled, assembled, or tested mechanically, FDM offers the best cost-performance ratio.
Upload CAD files
SLA 3D Printing
SLA 3D Printing
SLA 3D printing uses an ultraviolet laser to cure liquid photopolymer resin layer by layer. It produces the finest detail and smoothest surface finish of any plastic 3D printing technology.
- Best for: High-detail prototypes, master patterns for molding, smooth cosmetic models
- Materials: Standard resin, tough resin, castable resin, high-temperature resin
- Tolerances: ±0.005 inch or ±0.002 mm/mm
- Layer height: 0.001–0.006 inch (0.025–0.15 mm)
- Lead time: 3–5 days
- Surface finish: Smooth, near-injection-mold quality
- Build volume: Up to 145 × 145 × 175 mm
SLA is the go-to choice for custom 3D printing when surface appearance matters. Fine features, sharp edges, and smooth curves reproduce accurately. Post-processing options include sanding, painting, and clear coating for presentation-ready prototypes.
Get SLA quote
SLS 3D Printing
SLS 3D Printing
SLS 3D printing uses a high-power laser to fuse nylon powder layer by layer. The unsintered powder acts as natural support, enabling complex geometries without support structures.
- Best for: Functional end-use parts, complex geometries, snap-fit assemblies, living hinges
- Materials: Nylon 12 (PA12), Nylon 11 (PA11), glass-filled nylon
- Tolerances: ±0.010 inch or ±0.003 mm/mm
- Layer height: 0.004–0.006 inch (0.1–0.15 mm)
- Lead time: 4–7 days
- Surface finish: Slightly grainy, dyeable
- Build volume: Up to 340 × 340 × 600 mm
SLS nylon parts are strong, flexible, and chemically resistant. They handle snap fits, press fits, and functional loading better than FDM or SLA. The lack of support structures also means design freedom — internal channels, interlocking parts, and complex undercuts print without issue.
Get SLS quote
MJF 3D Printing
MJF 3D Printing
MJF 3D printing deposits fusing and detailing agents onto a nylon powder bed, then applies heat to fuse layers. It produces isotropic parts with consistent mechanical properties in all directions.
- Best for: Production-grade nylon parts, isotropic mechanical properties, high detail
- Materials: PA12, PA11, polypropylene (PP)
- Tolerances: ±0.008 inch or ±0.002 mm/mm
- Layer height: 0.003 inch (0.08 mm)
- Lead time: 4–7 days
- Surface finish: Smooth, consistent gray or black finish
- Build volume: Up to 380 × 284 × 380 mm
MJF excels in custom 3D printing where mechanical consistency matters. Unlike FDM, which has weaker layer-to-layer bonding, MJF parts perform similarly in X, Y, and Z directions. This makes MJF ideal for functional brackets, housings, and components that see multi-directional loading.
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DMLS 3D Printing
DMLS 3D Printing
DMLS 3D printing uses a fiber laser to fuse metal powder layer by layer, producing fully dense metal parts directly from CAD data. It is the technology of choice for complex metal geometries that would be expensive or impossible to machine.
- Best for: Metal prototypes, complex metal geometries, lightweight topology-optimized parts
- Materials: Aluminum (AlSi10Mg), stainless steel (316L), titanium (Ti6Al4V), Inconel 718
- Tolerances: ±0.005 inch or ±0.002 mm/mm
- Layer height: 0.001–0.004 inch (0.02–0.1 mm)
- Lead time: 5–10 days
- Surface finish: Matte metal, support removal required
- Build volume: Up to 250 × 250 × 300 mm
DMLS opens design possibilities that machining cannot match. Internal cooling channels, topology-optimized lattices, and consolidated assemblies are all routine. Post-processing includes machining critical surfaces, heat treatment, and surface finishing to meet specification.
Get DMLS quote
Quality Assurance
Quality Assurance for Custom 3D Printing
Quality is not a final check. It is built into every stage of our 3D printing process, from material verification to final dimensional inspection.
In-Process Quality Control
Every custom 3D printing job starts with build platform calibration and material verification. For DMLS metal printing, we verify powder composition and particle size distribution. For SLA, we confirm resin viscosity and tank condition. Layer-by-layer monitoring catches anomalies early, before they affect part quality.
Post-Print Inspection
All parts pass dimensional inspection against the original CAD model. Critical dimensions are verified on CMM (Coordinate Measuring Machine) equipment with measurement uncertainty of ±0.0004 inch. Surface roughness is measured with profilometry for applications requiring specific Ra or Rz values.
Certifications and Documentation
- ISO 9001:2015 Quality Management System
- AS9100D Aerospace Quality Standard
- Material certificates of conformance
- Full inspection reports with every shipment
- Material traceability from raw stock to finished part
Material Library
Materials for Custom 3D Printing
Material selection determines how your custom 3D printing part performs mechanically, thermally, and chemically. Baetro offers 20+ materials across five 3D printing technologies.
Plastic and Polymer Materials
ABS (FDM): Impact-resistant, dimensionally stable, and easy to post-process. Ideal for functional prototypes, enclosures, and parts that will see handling or moderate mechanical load. Cost-effective and fast.
PLA (FDM): Biodegradable and easy to print with minimal warping. Best for concept models, visual prototypes, and educational applications. Not suitable for high-temperature or mechanical applications.
Nylon — PA12 and PA11 (SLS, MJF): Strong, flexible, and chemically resistant. PA12 offers the best stiffness and detail. PA11 provides superior impact resistance and environmental stability. Both handle snap fits and living hinges well.
TPU (FDM): Flexible, rubber-like material with Shore 85A–95A hardness. Ideal for gaskets, seals, grippers, and wear pads. Can be printed in varying infill densities to tune flexibility.
Resin — Standard, Tough, Castable, High-Temp (SLA): Standard resin captures fine detail for visual models. Tough resin mimics ABS strength for functional testing. Castable resin burns out cleanly for jewelry and investment casting. High-temperature resin withstands up to 289°C for thermal testing.
Polypropylene — PP (MJF): Flexible, chemically resistant, and ideal for living hinges and fluid contact applications. Replicates injection-molded PP properties closely.
Metal Materials
Aluminum — AlSi10Mg (DMLS): Lightweight with good thermal conductivity and post-machinability. Ideal for heat sinks, lightweight structural brackets, and aerospace components. Can be anodized after printing.
Stainless Steel — 316L (DMLS): Corrosion-resistant, strong, and biocompatible. Suitable for marine hardware, food processing equipment, and medical device prototypes. Can be polished and passivated.
Titanium — Ti6Al4V (DMLS): Highest strength-to-weight ratio of any 3D printing material. Biocompatible and aerospace-grade. Used for medical implants, aerospace brackets, and high-performance components.
Inconel 718 (DMLS): Nickel-based superalloy with exceptional heat and corrosion resistance. Used for turbine components, exhaust systems, and chemical processing equipment operating above 700°C.
Polymer
Nylon PA12
Strong, flexible, and chemically resistant. Best stiffness and detail for SLS and MJF applications.
Polymer
ABS
Impact-resistant and dimensionally stable. Ideal for functional prototypes and enclosures.
Metal
Aluminum AlSi10Mg
Lightweight with excellent thermal conductivity. Ideal for heat sinks and aerospace brackets.
Metal
Titanium Ti6Al4V
Highest strength-to-weight ratio. Biocompatible and aerospace-grade for medical implants.
Design Guidelines
Wall Thickness Requirements for 3D Printing
Walls that are too thin warp, crack, or fail to print. Walls that are too thick waste material and increase cost. Use this table as a quick reference for each technology.
| Technology | Minimum Wall Thickness | Recommended Wall Thickness |
|---|---|---|
| FDM | 0.04 inch (1.0 mm) | 0.06 inch (1.5 mm) |
| SLA | 0.02 inch (0.5 mm) | 0.04 inch (1.0 mm) |
| SLS | 0.03 inch (0.8 mm) | 0.05 inch (1.2 mm) |
| MJF | 0.02 inch (0.5 mm) | 0.04 inch (1.0 mm) |
| DMLS | 0.015 inch (0.4 mm) | 0.03 inch (0.8 mm) |
These are general guidelines. Part geometry, orientation, and material can affect the minimum wall thickness your part can achieve. During free DfAM review, our engineers evaluate your specific design and recommend adjustments to ensure printability and cost-efficiency.
Process Comparison
Custom 3D Printing vs CNC Machining — Which Should You Choose?
Engineers often ask whether to use custom 3D printing or CNC machining for a part. The answer depends on geometry, tolerances, material, volume, and timeline. Here is how the two processes compare.
Comparison Table
| Factor | Custom 3D Printing | CNC Machining |
|---|---|---|
| Best for | Complex geometries, no tooling, low volume | Tight tolerances, smooth finishes, all materials |
| Standard lead time | 3–7 days | 3–7 days |
| Minimum order | 1 part | 1 part |
| Standard tolerances | ±0.005–0.010 inch | ±0.001 inch |
| Surface finish | Layered, improving with post-processing | Smooth as-machined |
| Material range | Plastics, select metals | All metals, all plastics |
| Cost at low volume | Lower, no tooling | Higher, setup costs |
| Cost at high volume | Higher per part | Lower per part |
| Design freedom | Very high, internal features, lattices | Constrained by tool access |
| Strength | Good — varies by technology and orientation | Excellent — uniform material properties |
Decision Guide
- Choose custom 3D printing when: You need prototypes fast, the geometry is complex with internal features, volumes are low (under 100 parts), you want to avoid tooling costs, or you need topology-optimized lightweight designs.
- Choose CNC machining when: Tolerances must be tighter than ±0.005 inch, surface finish Ra 32 or better is required, production volumes exceed 100 parts, you need materials not available for 3D printing, or part strength is critical.
- Hybrid approach: Many projects use both. Start with 3D printed prototypes to validate design. Transition to CNC machined pre-production parts for tighter tolerance verification. Scale to injection molding for production volumes. Baetro supports every stage.
Quality Assurance
Quality Assurance & Inspection for 3D Printing
Quality is not a final check. It is built into every stage of our 3D printing process, from material verification to final dimensional inspection.
Our Quality Systems
- ISO 9001 certified quality management system
- AS9100 certified for aerospace quality standards
- Full material traceability from raw powder/filament to finished part
- In-process monitoring on every print job
- Dimensional inspection on calibrated measurement equipment
- Surface finish verification for critical surfaces
- First article inspection reports for production approval
- 100% inspection or AQL sampling per customer requirements
What You Receive with Every Shipment
Every order includes a comprehensive inspection report documenting key quality data for your 3D printed parts.
- Dimensional measurements against your CAD file
- Material certification and traceability
- Surface finish verification when specified
- Pass/fail status for all critical dimensions
- Print parameters and machine used for the job
- Inspector signature and inspection date
Design Guidelines
Orientation and Build Direction
How a part sits on the build platform affects strength, surface finish, and support requirements. Our engineers optimize orientation during the free DfAM review, but understanding the principles helps you design better parts.
Z-Axis Strength
FDM and DMLS parts are weakest between layers (Z-axis). Orient load-bearing features in X/Y when possible. This ensures that critical load paths run parallel to the print layers rather than perpendicular to them, maximizing part strength.
Surface Finish
Curved surfaces facing upward print smoother. Downward-facing surfaces show support marks. Consider which surfaces are cosmetic or functional and orient your part accordingly to put the best finish on those faces.
Flatness
Large flat surfaces parallel to the build plate print with better flatness. Avoid large flat surfaces angled to the plate, as they may warp or require extensive supports that compromise dimensional accuracy.
Applications
Applications for Custom 3D Printing
Custom 3D printing serves applications across every stage of product development. Here is how our customers use custom 3D printing with each technology.
Application
Prototyping and Design Validation
Engineers use our rapid prototyping services to test form, fit, and function before committing to tooling. A 3D printed prototype costs a fraction of a machined part and arrives in days rather than weeks. Design teams iterate faster, catch interference issues early, and validate ergonomics with physical models.
FDM and SLA dominate custom 3D printing prototyping for their speed and low cost. FDM handles functional testing with ABS or nylon. SLA produces presentation models with smooth surfaces for stakeholder reviews and trade show displays.
Application
Functional End-Use Parts
SLS and MJF produce parts strong enough for real-world use. Customers print jigs and fixtures for assembly lines, custom brackets for equipment retrofits, and replacement parts for legacy machinery where OEM components are obsolete.
A robotics manufacturer uses SLS nylon for end-effector fingers. The natural flexibility of PA12 grips irregular parts without scratching. A medical device company prints custom instrument trays in MJF PA12, sterilizing and reusing them across hundreds of procedures.
Application
Low-Volume Production
When production volumes fall below the threshold where injection molding makes economic sense, 3D printing fills the gap. No tooling investment means no risk if demand changes. Parts print on demand, eliminating inventory carrying costs.
MJF is increasingly used for production runs of 50–500 units where the part geometry is complex and CNC machining would require multiple setups. The per-part cost is higher than molding at volume, but the total project cost is lower when tooling is factored in.
Design Guidelines
Overhangs and Support Structures
Overhangs are surfaces that extend outward without support beneath them. Each technology handles them differently. Understanding these differences helps you design parts that print successfully the first time.
FDM
Overhangs beyond 45 degrees from horizontal require support structures. These add material, increase print time, and leave marks where they attach. Orienting your part to minimize overhangs improves surface quality and reduces cost.
SLA
All overhangs require supports because liquid resin offers no natural support. Supports are automatically generated by our software and removed during post-processing. Design with drain holes for hollow parts to prevent resin trapping.
SLS and MJF
The powder bed acts as natural support. Parts can have overhangs, bridges, and internal channels without dedicated supports. This is a major advantage for complex geometries.
DMLS
Metal supports are required for overhangs steeper than 35 degrees and for thermal management. Support removal on metal parts requires machining or EDM, adding cost and time. Minimizing supports in metal design is a priority.
Cost considerations
How Pricing Works for Custom 3D Printing
Our custom 3D printing instant quote engine analyzes your CAD file geometry and calculates pricing based on four factors.
- Part volume: The amount of material required, including supports
- Technology: FDM is least expensive; DMLS is most expensive
- Material: Standard materials cost less than engineering or metal grades
- Quantity: Volume discounts apply at 10, 50, and 100+ pieces
Post-processing is priced separately. Basic support removal and surface cleaning are included. Sanding, painting, dyeing, vapor smoothing, and plating are optional add-ons with transparent pricing. Get your 3D printing quote online in under 60 seconds to see exact pricing.
FAQ
Custom 3D Printing FAQ
Answers to common questions about custom 3D printing file formats, costs, lead times, strength, DfAM, and post-processing.
What file formats do you accept for custom 3D printing?
We accept STL, OBJ, STEP, IGES, 3MF, and native CAD files from SolidWorks, Autodesk Inventor, and Fusion 360. For best results, we recommend STL files with a deviation of 0.001–0.005 inch and watertight, manifold meshes. STEP files are preferred for DMLS metal printing where dimensional accuracy is critical.
How much does custom 3D printing cost?
Custom 3D printing cost depends on part volume, technology, material, and quantity. Small FDM prototypes in ABS start under $10. SLS nylon functional parts typically range from $25–$150 depending on size. DMLS metal parts range from $100–$500+ based on material and complexity. Upload your CAD file for an instant, exact quote with no hidden fees.
What is the fastest custom 3D printing option?
FDM and SLA offer the fastest turnaround at 3–5 days including post-processing and inspection. For same-week delivery, select our expedited option, which reduces lead time to 2–3 days. Standard shipping adds 3–5 days to North America and Europe; express shipping cuts that to 2–3 days.
Can 3D printed parts be as strong as machined parts?
3D printed parts can achieve high strength. SLS nylon and DMLS metal parts approach machined material properties in many applications. However, CNC machined parts generally offer tighter tolerances (±0.001 inch vs ±0.005 inch), superior surface finish, and uniform material properties without layer boundaries. For functional prototypes and many end-use applications, 3D printed strength is sufficient. Our engineers can recommend the right process based on your load, tolerance, and surface requirements.
What is DfAM and why does it matter?
DfAM — Design for Additive Manufacturing — is the practice of optimizing part designs specifically for 3D printing. It considers build orientation, support structures, wall thickness, and feature resolution to improve part quality, reduce cost, and speed up production. A part designed for machining often prints poorly without DfAM adjustments. Baetro includes free DfAM review with every quote, catching optimization opportunities before production.
Do you offer post-processing for 3D printed parts?
Yes. We offer sanding, bead blasting, vapor smoothing, painting, dyeing, and plating. Metal DMLS parts can be CNC machined for critical surfaces, heat-treated for additional strength, polished to a mirror finish, or plated with nickel or chrome. Specify your finish requirements when requesting a quote and we will include transparent pricing.
Quote-ready manufacturing
Get Your Custom 3D Printing Quote Today
Upload your CAD file and receive an instant quote with technology recommendations, material options, and lead times. Our engineers review every submission for DfAM optimization at no extra cost.
Whether you need a single prototype for design validation or 1,000 production parts with full documentation, Baetro delivers custom 3D printing that combines design freedom, material expertise, and fast turnaround.
Parts ship in 3–7 days. No minimum order quantity. ISO 9001 & AS9100 certified.
Not ready to upload a file? Contact our engineers to discuss your project, review material options, or get guidance on DfAM and technology selection.