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SLS 3D Printing Services

SLS 3D Printing Services

Selective laser sintering turns nylon powder into tough, production-ready parts without support structures or tooling. Enstark uses SLS for snap-fits, living hinges, internal channels and batches of hundreds of end-use components packed into a single build.

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Huawei Technologies
Samsung Electronics
Tata Motors
Delta Electronics
Lens Technology
Eveready Industries
Beijing Institute of Technology
Ansell LTD
NRTC
Chantelle
PT Wings Surya
PT Sun Paper Source
PT Supreme Paper Solution
Huawei Technologies
Samsung Electronics
Tata Motors
Delta Electronics
Lens Technology
Eveready Industries
Beijing Institute of Technology
Ansell LTD
NRTC
Chantelle
PT Wings Surya
PT Sun Paper Source
PT Supreme Paper Solution
Design Guide
Max dimension340 × 340 × 600 mm
Layer Thickness0.08–0.12 mm
Tolerances±0.3 mm or ±0.3%
Wall Thickness
0.8 mm minimum; 1.2 mm+ for load-bearing walls
Min Feature Size
0.8 mm; clearance between moving parts 0.5 mm
Surface Finish Options
As-sintered, bead-blasted, dyed black, vapor-smoothed, painted, lacquer-sealed
Design advice
1/ Add powder escape holesUnsintered powder gets trapped inside enclosed cavities. Add at least two holes of 5 mm diameter or larger to any hollow section so we can clear it completely. Hollowing thick parts this way also reduces weight, cost and the risk of sink.
2/ Rib large flat panelsBig, thick, flat areas shrink unevenly as the build cools, which causes warping. Keep wall thickness uniform, and replace solid blocks with ribs or lattices to maintain flatness and cut sintering time.

SLS 3D Printing Materials

Our SLS range covers the four nylon-based powders that handle most production 3D printing work: general-purpose PA12, ductile PA11, stiff glass-filled PA12 and flexible TPU. Powder refresh ratios are controlled and recorded on every build, which keeps mechanical properties consistent from batch to batch.
PA12 Nylon
The industry benchmark for SLS. PA12 offers a balanced mix of strength, stiffness and chemical resistance, along with fine feature resolution. It suits housings, brackets, clips and functional assemblies that go straight into service.
Natural White / Black (dyed)
Color
$$
Price
From 3 business days
Lead Time
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PA12 Nylon
With 30 years of manufacturing experience, we manage the complete production cycle through one accountable engineering team.Why Enstark for SLS 3D PrintingEvery project is reviewed according to its size, weight, material, geometry and critical requirements.
300+Sets of Machine
120+Countries Shipped
20k+Customers Served
Global Shipping World Map
3D Printing Geodesic Sphere Prototype
3D Printing Polymer Lattice Structures
Direct Metal 3D Printing Components
3D Zeiss CMM Inspection Lab
Enstark Online 3D Printing Service SolutionsGet Quote
3D Printing/01
Move from CAD to physical part in days. Validate form, fit and function with MJF, SLA, DLP and other additive processes, then iterate quickly before committing to tooling.
3D Printing Solution
Vacuum Casting/02
Need 20 to 50 production-quality parts? Vacuum casting from silicone molds gives near-molded surfaces and a wide range of urethane properties for pilot runs and market trials.
Vacuum Casting Solution
Injection Molding/03
When volumes reach the thousands, injection molding delivers the lowest unit cost and tight repeatability. We help you move from printed parts to production tooling without redesign surprises.
Injection Molding

SLS Post-Processing Capabilities

Raw SLS parts have a slightly grainy matte texture. The finishing options below improve appearance, sealing and feel.

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Finishing Process
Surface Roughness
Dimensional Change
Primary Application / Benefit
As-Sintered (depowdered)
6–12 µm
None
Lowest cost; internal and functional parts
Bead Blasting / Media Tumbling
4–8 µm
−0.02 to −0.05 mm
Uniform satin finish; removes residual powder
Dyeing (Black)
Unchanged
None
Consistent color that hides scratches and handling marks
Vapor Smoothing
1–3 µm
Slight edge rounding
Sealed, washable surface with a near-molded look
Primer & Paint
1–2 µm
+50 to +120 µm
Custom colors and branded consumer parts
Lacquer / Sealing
3–6 µm
+20 to +40 µm
Reduces moisture uptake; improves liquid resistance
Heat-Set Threaded Inserts
N/A
N/A
Durable metal threads in nylon assemblies

Why Choose Us

Engineers choose Enstark for SLS because we treat every build as a production run: controlled, documented and repeatable.

/01
High Quality Parts
Controlled powder refresh, stable chamber temperatures and post-build inspection deliver strong, consistent nylon parts within ±0.3 mm.
High Quality Parts
/02
Fast Lead Time
Builds run on a frequent schedule, and most orders ship in 3–5 business days, including the cooldown time that SLS parts need to prevent warping.
Fast Lead Time
/03
Engineering-Driven Support
We help consolidate multi-part assemblies into single prints, place escape holes and nest batches to lower your unit cost.
Engineering-Driven Support

What is SLS 3D Printing?

Selective Laser Sintering (SLS) is a powder bed fusion process in which a laser fuses thin layers of polymer powder, usually nylon, into a solid part. The surrounding unsintered powder supports each layer as it forms. As a result, SLS needs no support structures and can produce interlocking parts, internal channels and dense batches in a single build.

✓Material traceability
✓Batch consistency for production runs
✓In-process quality control
✓Dimensional inspection before shipment
✓Tolerances up to ±0.1 mm
✓Final inspection before delivery

Pros and Cons of SLS 3D Printing

Pros of SLS 3D Printing

No Support Structures Required

No support structures, which allows internal channels, lattices and print-in-place assemblies.

Strong Near-Isotropic Nylon

Strong, near-isotropic nylon parts ready for end use.

Economical Batch Production

Economical batch production through dense 3D part nesting in build volumes.

SLS 3D Printing Process

Cons of SLS 3D Printing

Grainy As-Sintered Finish

Grainy as-sintered surface that needs finishing for cosmetic faces.

Long Cooldown Cycles

Long cooldown cycles extend lead time compared with FDM.

Moisture Absorption

Nylon absorbs some moisture, which can slightly affect dimensions in high humidity.

frequently Asked Questions.
Frequently Asked Questions
What is SLS 3D printing used for?

SLS is used for functional prototypes and low-volume production parts with complex geometry. Typical examples include snap-fit housings, ducts, living hinges, lattice structures and consolidated assemblies that would need multiple molded parts.

How accurate is SLS 3D printing?
What is the difference between PA12 and PA11?
Are SLS parts watertight?
Can SLS replace injection molding for low volumes?
Can SLS parts be colored?
How long does SLS 3D printing take?
What is the difference between SLS and MJF?

SLS 3D Printing Technical Resources

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