SLS 3D Printing Service from a Trusted China Manufacturer

We print tough, functional nylon parts with no supports to cut off. As a China SLS 3D printing manufacturer and supplier, our factory fuses powder layer by layer, so overhangs, hollow shapes, and moving parts come out clean in one build. Upload your CAD file and get a factory-direct quote with free DFM feedback within 24 hours.

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ISO 9001 Certified Factory Quote in 24 Hours NDA Protected No Supports Needed

The Problem We Solve

Why Nylon Parts Go Wrong

These are the problems buyers tell us about every week. Here is how we take each one off your desk.

Support Marks and Cleanup

Resin prints need supports that leave marks and take hours to cut off. SLS uses loose powder as support, so parts come out clean with no marks.

Parts That Snap or Crack

Brittle resin breaks under load. SLS nylon is tough and takes impact, so it works for clips, brackets, and live hinges.

Warping on Flat Parts

Large flat shapes can curl as they cool. We add ribs, keep walls even, and place parts well in the build to keep them straight.

Trapped Powder Inside

Hollow parts can trap powder. We add escape holes and clean every cavity so your part is ready to use.

Slow, Vague Quotes

Waiting days for a price kills your timeline. Send your files and get a clear, itemized quote within 24 hours.

Files Not Kept Safe

Your design is your business. We treat every file as confidential, sign NDAs on request, and never share your data.

SLS 3D printing at YiguProto China manufacturer
SLS 3D printing at YiguProto: precision, speed, and quality in one place

Our Solution

One China Manufacturer, One Accountable Partner

From your CAD file to a finished, dyed nylon part — all under one roof.

With YiguProto as your China manufacturer and supplier, you get one team that owns the whole job. No hand-offs, no blame games, no hidden costs.

  • Factory-direct pricing — no middleman markup
  • Free DFM feedback before you place the order
  • No support marks — powder holds the part up
  • Tough nylon parts that take impact and heat
  • Full finishing — dyeing, smoothing, painting, assembly
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Overview

What Is SLS 3D Printing?

A way to build tough nylon parts from powder — no supports, no tooling.

How It Works in Plain Words

A roller spreads a thin layer of nylon powder across a heated bed. A laser fuses the powder where the part should be solid. The bed drops a tiny step, a fresh layer of powder is spread, and the laser fuses the next slice. This repeats until the part is done.

The loose powder around the part holds it up, so no supports are needed. When the build ends, we lift the whole powder block out, brush and blast the parts clean, then dye or smooth them to your spec.

When to Choose SLS

  • Functional parts — clips, brackets, and live hinges that must work
  • Complex shapes — overhangs, hollow cores, and nested parts
  • Moving parts in one build — print-in-place joints and chains
  • Small to mid batches — no tooling cost to pay back
  • Impact and heat — parts that must take a hit and stay stiff
  • Big parts — one of the largest build envelopes of any process

Capabilities

SLS 3D Printing Capabilities at a Glance

Real numbers so you can spec your part with confidence.

FeatureCapability
ProcessSelective Laser Sintering (SLS) — powder bed fusion
Tolerance±0.2 mm (+ 0.002 mm per mm)
Layer thickness0.1 mm
Max part size676 × 367 × 564 mm (PA12)
Minimum wall0.8 mm (1.5 mm for vapor smoothing)
Minimum feature0.75 mm
SupportsNone needed — powder holds the part
Surface (as built)Matte, grainy (Ra 3.2 – 6.3 microns)
MaterialsPA12, glass-filled, carbon-filled, PA11, TPU
Lead time2 – 5 business days

What We Deliver

What Our SLS 3D Printing Service Covers

Everything you need from one China factory — no extra vendors to manage.

01

File Check & Repair

We check your model for holes, thin walls, and thick sections before printing.

02

Smart Nesting

We pack many parts into one build to share the cost and speed up delivery.

03

Laser Sintering

Parts are fused layer by layer in a heated powder bed, with no supports to add.

04

Breakout & Depowdering

We lift the powder block, break out the parts, brush, and bead blast them clean.

05

Powder Recycling

Unused powder is sieved and reused, which keeps your cost down and waste low.

06

Dyeing & Smoothing

Black dye for a uniform look, or vapor smoothing for a sealed, smooth surface.

07

Inserts & Tapping

Heat-stake threaded inserts and tapped holes for strong, reusable threads.

08

Assembly

Bonding, screwing, and light builds so parts arrive ready to use.

Not sure which nylon fits your part? Talk to an engineer for a free review.

Materials

Nylons and Flexible Powders We Print

Pick the powder that fits your load, heat, and flex needs. We help you choose for free.

50 MPa · 11% ELONGATION

PA12 Nylon

The all-purpose pick. Strong, tough, and heat-resistant, with good impact strength for real working parts.

42 MPa · 3600 MPa MODULUS

PA12 Glass-Filled

Stiffer and more heat-resistant than plain nylon, with great long-term wear resistance. Good for rigid parts.

85 MPa · 8300 MPa MODULUS

PA12 Carbon-Filled

The stiffest option, plus electrical conductivity. Ideal for rigid, light, dimensionally stable parts.

20 MPa · 520% ELONGATION

TPU Flexible

Rubber-like and stretchy, with strong tear and abrasion resistance. Great for seals, grips, and hoses.

Need PA11 for extra ductility or a special powder? Ask our engineers — we source it.

Post-Processing

Finishes That Make It a Real Part

Printed nylon comes out matte and grainy. These steps turn it into the part you can ship.

Bead Blasting

Cleans off loose powder and gives an even, matte texture across the whole part.

Vapor Smoothing

Seals the surface to a smooth finish that is water and air tight and easy to clean. Needs 1.5 mm walls.

Black Dyeing

A deep, even black that soaks into the part and will not rub off or flake.

Painting

Color matching and spray paint in your brand color for a product-ready look.

Inserts & Tapping

Heat-stake threaded inserts and tapped holes for strong, reusable threads.

Assembly

Bonding, screwing, and light builds so parts arrive ready to use.

Quality Control

Checked at Every Step, Not Just the End

Good parts are made, not sorted. Here is how we keep quality steady.

Powder Control

We use clean, sieved powder and track each batch for repeatable results.

Process Monitoring

Bed temperature, laser power, and layer thickness are watched on every build.

First-Part Check

The first part is measured and compared to your drawing and key features.

Dimensional Reports

Critical dimensions are measured and recorded for your records.

Visual & Cosmetic Check

Each part is checked for warping, layer marks, and surface flaws.

Pre-Shipment Review

Photos and reports go to you before the box leaves the factory.

Industries

Industries We Serve

Our China factory prints nylon parts for teams in many fields.

Automotive

Clips, ducts, brackets, and under-hood test parts.

Medical & Orthotics

Orthosis models, ergonomic supports, and custom tools.

Aerospace & Defense

Lightweight ducts, housings, and complex prototypes.

Drones & UAVs

Frames, motor mounts, and protective covers.

Robotics & Automation

Grippers, end effectors, and functional assemblies.

Consumer Products

Wearables, housings, and display models.

How It Works

From CAD File to Finished Part in 6 Steps

1

Upload Your Design

Send STEP, IGES, or STL files. We keep it private.

2

Get a Quote in 24h

Free DFM review and a clear, itemized price.

3

Nest & Prepare

We place parts in the build for the best strength and cost.

4

Laser Sintering

Your parts are fused layer by layer in a heated powder bed.

5

Clean & Finish

We blast off powder, then dye, smooth, or paint as needed.

6

Ship to Your Door

Worldwide shipping with tracking and reports.

Design Tips

Design Tips for Better SLS Parts

Small changes in your CAD cut cost and improve quality. We check all of these for free.

Add Powder Escape Holes

Hollow parts need at least two holes, 3–5 mm wide, so trapped powder can come out.

Keep Walls Even

Aim for 1.5–3.8 mm walls. Even walls cool at the same rate and stay straight.

Hollow Out Thick Areas

Sections over 4 mm can sink or warp. We hollow them to 2–4 mm walls to keep the shape true.

Add Ribs to Flat Areas

Large flat faces curl as they cool. Ribs add stiffness and spread the heat for a flat part.

Set 0.5 mm Clearance

For print-in-place moving parts, leave at least 0.5 mm so the laser heat does not fuse them.

Round the Corners

Sharp inner corners trap stress. A small fillet makes the part stronger and easier to build.

Send your file and we will return a free DFM report with clear, plain-English advice.

Which Process Fits?

SLS vs SLA: Which One Do You Need?

Both print plastic parts. The right pick depends on how the part will be used.

Choose SLS When…

  • Parts must work — clips, brackets, gears, and live hinges
  • No supports wanted — overhangs, hollow cores, and nested parts
  • Impact and heat — parts that must take a hit and stay stiff
  • Moving parts in one build — print-in-place joints and chains
  • Larger parts — one of the biggest build envelopes around

Choose SLA When…

  • Smooth looks matter — display models and client samples
  • Fine detail — tiny text, thin ribs, and crisp edges
  • Clear parts — light pipes, lenses, and see-through covers
  • Form and fit checks — parts that must drop into an assembly
  • Master patterns — masters for silicone casting

Not sure which way to go? Ask an engineer — we offer both and will tell you honestly.

Why YiguProto

Why Teams Choose Our China Factory

A partner who answers fast, quotes clearly, and ships on time.

Direct Factory Pricing

You buy from the maker, not a trader. That keeps your cost low and your margins healthy.

Fast, Clear Quotes

Most quotes come back in hours, never more than 24 hours, with free DFM feedback.

One Part or Thousands

No tooling and no strict MOQ. Parts share the build chamber, so small runs stay affordable.

Engineers Who Speak Plain English

You get clear advice, not jargon. We explain trade-offs so you can decide with confidence.

Quality You Can Check

Reports and photos before shipping mean no surprises when the box arrives.

One Partner, Many Processes

CNC, 3D printing, molding, and casting under one roof. Scale up without changing suppliers.

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Trusted Worldwide

Companies Around the World Rely on Our SLS Service

"We needed a snap-fit housing that would survive real drops. YiguProto printed it in PA12, and the clips flexed without cracking. The DFM notes even caught a wall that was too thick."

— Design Engineer, U.S. consumer electronics company

"No supports meant no cleanup, and the parts came out clean inside and out. We moved our whole bracket program to them because the price per part kept dropping as we scaled up."

— Founder, European robotics startup

"Tough, straight parts with an even black dye finish, batch after batch. We have used them for orthotic tools for over three years and they deliver on spec and on time."

— Engineering Director, Australian medical device maker

12+
Years in Manufacturing
3,000+
Molds Built
50+
Countries Served
ISO 9001
Certified Factory

FAQ

SLS 3D Printing — Frequently Asked Questions

SLS stands for Selective Laser Sintering. A laser fuses nylon powder, layer by layer, into a solid part. The loose powder around the part holds it up, so no supports are needed. The result is a tough, functional part that feels like molded plastic.
No. This is the biggest SLS advantage. Unmelted powder acts as natural support, so you can build overhangs, hollow shapes, and moving parts with no extra supports to cut off. That saves time and leaves no support marks.
SLS uses nylon powder and gives tough, functional parts that can take a hit. SLA uses liquid resin and gives very smooth, detailed parts but they are more brittle. Choose SLS for parts that must work and survive. Choose SLA for smooth looks and fine detail.
We offer PA12 nylon, PA12 glass-filled, PA12 carbon-filled, PA11, and flexible TPU. PA12 is the all-purpose pick. Glass-filled adds stiffness and heat resistance. Carbon-filled adds the most stiffness. TPU gives a rubber-like, stretchy part.
Standard tolerance is about ±0.2 mm, plus 0.002 mm per mm. Layer thickness is 0.1 mm. We confirm the key dimensions in your free DFM review.
Our build envelope goes up to 676 x 367 x 564 mm for PA12. Because SLS needs no supports, the whole build chamber can be packed with parts, which keeps the price per part low.
Yes. SLS nylon has good impact strength, tensile strength, and heat resistance. PA12 reaches about 50 MPa tensile strength with 11% elongation. Many of our SLS parts are used as real end-use parts, not just models.
As-printed parts have a matte, grainy skin. We offer bead blasting, black dyeing, vapor smoothing for a sealed smooth surface, painting, and light assembly. Vapor smoothing needs a wall thickness of at least 1.5 mm.
Upload your 3D CAD files and tell us your material, quantity, and finish needs. Most quotes come back within a few hours on business days, and never more than 24 hours. Every quote includes free DFM feedback.
We prefer STEP (.stp, .step) or IGES (.igs, .iges) files for clean geometry. We also accept SolidWorks, Inventor, Creo/ProE, Parasolid (.x_t), and STL files. 2D PDF or DWG drawings are welcome for tolerances and notes.
There is no strict MOQ. We print one part or a full production run. Because parts share the build chamber and there is no tooling cost, small batches are affordable.
Yes. All customer files and ideas are treated as confidential. We sign NDAs when needed and never share your data.

Need SLS 3D printing from a trusted China manufacturer?

Send your files and get a factory-direct quote within 24 hours.

Get My Free Quote