Custom 3D Printing Services for Prototypes & Low-Volume Production

Fast, accurate 3D printed parts for design validation, functional testing, bridge production, and end-use applications.

SLA / SLS / MJF / SLM
Fast Prototypes
Engineering Materials
Post-Processing Available
Global Shipping
Industrial 3D Printing Service

Need Parts Faster Without Expensive Tooling?

Accelerate your product development cycle and mitigate risks with rapid, tool-less manufacturing.

Validate Designs Early

Test and refine your geometries before committing to expensive injection mold investments.

Test Fit & Function

Produce functional prototypes to verify assembly, ergonomics, and mechanical performance quickly.

Reduce Development Risk

Iterate rapidly based on physical testing feedback, ensuring the final product works flawlessly.

Avoid High Tooling Costs

Launch early-stage products or market tests without the upfront capital expenditure of molds.

Low-Volume Production

Economically manufacture bridging volumes (1-500 parts) while waiting for mass production tooling.

Support Engineering Changes

Implement design revisions instantly without modifying physical tools or incurring rework costs.

Choose the Right 3D Printing Technology

Compare industrial-grade additive manufacturing processes to find the perfect match for your application.

SLA 3D Printing

SLA

Stereolithography

Best For

Smooth visual prototypes

Strength

High detail and incredibly smooth surface finish.

Common Use

Appearance models, small housings, clear parts, presentation models.

SLS 3D Printing

SLS

Selective Laser Sintering

Best For

Functional plastic parts

Strength

No support structures needed, good mechanical strength and durability.

Common Use

Brackets, clips, housings, functional prototypes, snap-fits.

POPULAR
MJF 3D Printing

MJF

Multi Jet Fusion

Best For

Strong nylon production parts

Strength

Consistent isotropic quality, excellent mechanical properties, better repeatability.

Common Use

Low-volume production, jigs, fixtures, end-use parts, complex assemblies.

Metal 3D Printing

SLM / DMLS

Direct Metal Laser Sintering

Best For

Metal 3D printed parts

Strength

Creates complex metal geometries impossible with traditional machining.

Common Use

Aerospace components, medical implants, tooling inserts, lightweight structures.

Which Process Is Best for Your Project?

Understanding when to use additive vs. subtractive vs. formative manufacturing is key to optimizing cost and lead time.

3D Printing

  • Best for prototypes, complex geometry, and fast design changes.
  • No upfront tooling required.
  • Ideal for low volumes.
Typical Use: 1–500 pcs

CNC Machining

  • Best for tight tolerances and real production materials.
  • Excellent for metal parts and functional testing.
  • Higher unit cost than molding, but no mold cost.
Typical Use: 1–5,000 pcs

Injection Molding

  • Best for high-volume plastic production.
  • Lowest unit cost at scale.
  • Requires significant upfront tooling investment and time.
Typical Use: 1,000+ pcs

Buyer Guidance Summary

  • • If you are still testing the design, choose 3D printing.
  • • If you need production-grade metal or tight tolerance, choose CNC.
  • • If you are ready for mass production, choose injection molding.
Discuss Your Project

3D Printing Materials for Engineering Applications

From presentation-ready resins to production-grade metals, we offer a wide range of materials to meet your mechanical and aesthetic requirements.

SLA Materials (Resins)

Standard Resin

General purpose prototyping with excellent detail.

Smooth Finish Low Cost

Tough Resin

Simulates ABS. High impact strength for snap-fits.

High Strength Med Cost

Clear Resin

Optically clear when polished. Great for fluidics or lighting.

Transparent Med Cost

High-Temp Resin

Withstands high heat deflection temperatures.

Heat Resistant Med Cost

SLS / MJF Materials (Powders)

Nylon PA12

The industry standard. Excellent balance of strength and flexibility.

Durable Cost Effective

Nylon PA11

Higher ductility and impact resistance than PA12.

High Impact Med Cost

Glass-Filled Nylon

Enhanced stiffness and thermal stability.

Rigid Med Cost

TPU

Flexible, rubber-like material for seals, gaskets, and grips.

Flexible Med Cost

Metal Printing Materials

Aluminum (AlSi10Mg)

Lightweight with good thermal properties. Great for aerospace.

Lightweight High Cost

Stainless Steel (316L)

High corrosion resistance and excellent ductility.

Corrosion Resistant High Cost

Titanium (Ti6Al4V)

Exceptional strength-to-weight ratio. Used in medical and aerospace.

Ultra Strong Premium Cost

Tool Steel (Maraging)

High strength and hardness, ideal for conformal cooling molds.

Hardness Premium Cost

Built for Engineering, Testing and Production Support

3D printing is no longer just for basic models. It is a critical tool across the entire product lifecycle.

Concept Models
Functional Prototypes
Fit-Check Parts
Jigs and Fixtures
Assembly Aids
Low-Volume Production
Bridge Production
Replacement Parts
Lightweight Structures
Medical Components

From Printed Parts to Finished Products

Raw 3D printed parts often need refinement. We offer comprehensive finishing services to meet your functional and cosmetic requirements.

Support Removal
Sanding
Polishing
Painting
Dyeing
Vapor Smoothing
Bead Blasting
CNC Secondary Machining
Thread Inserts
Assembly
Custom Packaging

Need cosmetic prototypes for customer presentation?
We can provide professional painting, smoothing, and assembly support to make your 3D printed parts look like final production units.

Clear Expectations Before Production

We believe in transparent communication regarding what additive manufacturing can and cannot achieve.

Lead Time

Prototype parts can be delivered in as fast as 3–7 days depending on material, process complexity, and quantity ordered.

Tolerance

Tolerance depends on printing technology, part size, material, and post-processing. Generally, expect standard industrial 3D printing tolerances (e.g., ±0.2mm or ±0.002mm/mm).

Quality Control

Dimensional inspection, visual inspection, material verification, and functional checks are available to ensure your parts meet specifications.

Best Practice

3D printing struggles with extremely tight tolerances (like H7 holes). For critical dimensions, we highly recommend adding secondary CNC machining after printing.

What Affects 3D Printing Cost?

Part volume & size
Material selection
Printing technology
Quantity ordered
Surface finish
Post-processing
Inspection needs
Assembly requirements

Buyer Tip: 3D printing is usually most cost-effective for prototypes, highly complex geometries, and low-volume production where creating a traditional mold is not financially justified.

Design Guidelines for Better Parts

  • Minimum wall thickness: Ensure walls are thick enough to survive printing and post-processing (varies by process).
  • Hole sizes: Small holes may close up; plan to drill them out post-print if critical.
  • Thread inserts: Design appropriate boss diameters for heat-set inserts instead of printing fine threads.
  • Part orientation: Remember that Z-axis strength is typically lower than X/Y axis strength.
  • Support marks: SLA and FDM will leave marks where supports are removed; plan cosmetic surfaces accordingly.
  • Warpage risk: Large flat surfaces are prone to warping; add ribs or reconsider orientation.
  • Large part splitting: Parts exceeding build volumes can be split with interlocking joints and bonded later.
Request Free DFM Review

Trusted Across Demanding Industries

Robotics Medical Devices Automotive Aerospace Consumer Electronics Industrial Equipment Automation Systems Lighting Energy Products Product Development Teams

Real-World Procurement Value

How our clients leverage 3D printing to save time and reduce manufacturing costs.

Prototype Housing

Functional Prototype Housing

Challenge: Customer needed fit and assembly validation before committing $15,000 to an injection mold investment.

Solution: SLA prototype printed in Tough Resin with a custom painted finish to mimic the final product.

Result: A critical interference issue was found during physical assembly, saving thousands in potential mold modification costs.

Low-Volume Bracket

Low-Volume Nylon Bracket

Challenge: Annual demand for a specialized mounting bracket was only 300 pieces—too low for injection molding.

Solution: Transitioned the design to MJF PA12 for end-use production parts.

Result: Zero tooling cost incurred, and parts were delivered in 5 days instead of 4 weeks, improving cash flow.

Metal Lightweight Component

Metal Lightweight Component

Challenge: A robotic arm component required complex internal cooling channels that could not be easily CNC machined.

Solution: Metal 3D printing (SLM) in Aluminum, followed by secondary CNC machining for critical mounting surfaces.

Result: Reduced part weight by 40% and consolidated a 3-part assembly into a single component.

More Than Just 3D Printing

Unlike standard "print farm" bureaus, we are a full-service manufacturing partner. We can support your project from a 3D printed prototype to CNC samples, injection molding tooling, mass production, assembly, and shipping.

  • Multiple Printing Technologies
  • In-House CNC Machining
  • Injection Molding Transition
  • Finishing & Assembly
  • Engineering DFM Feedback
  • Prototype-to-Production
  • US Sales & Support
  • Global Delivery
LK Tools Manufacturing Facility

Frequently Asked Questions

What file format do you need for 3D printing?
We prefer STEP (.stp) or standard STL files. STEP files are highly recommended if you require secondary CNC machining or tight tolerance reviews, as they contain true geometric data.
Which 3D printing process should I choose?
It depends on your goal. For smooth visual models, choose SLA. For strong functional plastic parts, choose SLS or MJF. For metal components, choose SLM. Our engineering team can recommend the best process during the quoting phase.
Is 3D printing strong enough for functional parts?
Yes. Technologies like MJF (Nylon) and SLM (Metal) produce highly durable, isotropic parts that are routinely used for end-use functional applications in automotive, aerospace, and industrial equipment.
Can 3D printed parts be used for production?
Absolutely. Low-volume production (1-500 units) via MJF or SLS is very common, especially when the cost of injection molding tooling is prohibitive for the required volume.
What is the minimum order quantity?
We have no minimum order quantity (MOQ). You can order a single prototype or hundreds of production parts.
Can you paint or finish 3D printed parts?
Yes, we offer comprehensive post-processing including sanding, polishing, custom painting, dyeing, and vapor smoothing to achieve a production-like finish.
Can you add threaded inserts or machine critical dimensions?
Yes. We can install heat-set threaded inserts into plastic parts and perform secondary CNC machining on both plastic and metal 3D printed parts to hit tight tolerances that printing alone cannot achieve.
When should I switch from 3D printing to injection molding?
Typically, when your design is finalized and your volume exceeds 500–1,000 units, the lower unit cost of injection molding justifies the upfront tooling investment. We can help you transition seamlessly when the time is right.

Need Fast Prototype or Low-Volume Parts?

Upload your 3D CAD files and receive DFM feedback, process recommendations, and a competitive quote.

sales@lkmfg.com
9454091013
1750 Briercoft Ct, Suite 204,
Carrollton, TX 75006, USA
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