SLS
3D Printing Services

Get instant online 3D printing quotes for plastic and metal parts.
Rapid 3D printing services from prototype to production with fast lead times.

  • Tolerances as fine as ±0.2 mm.
  • ISO 9001:2015, ISO 13485, ISO14001:2015, IATF 16949:2016 certified
  • Lead time as fast as 1 day
Start a New 3D printing quote online
cnc parts
Drag and drop file or click to upload
STEP | STP | STL | IGS | IGES | PRT | SLDPRT | SAT | X_T
Max. file size: ≤15MB

Design Guide

Max Dimension
600×600×800 mm
Layer Thickness
0.15 mm
Tolerances
ISO 2768-C
Wall Thickness
0.5 mm
Min Feature Size
0.5 mm
Surface Finish Options
Bead Blasting, Vapor Smoothing, Color Dyeing, Spray Painting, Electroplating, Tapping,Threaded Inserts

Design Advice

  • Powder Escape Holes: Hollow out thick sections to minimize heat accumulation and material costs. Ensure at least two escape holes (minimum 3–5 mm diameter) are included to allow unfused powder to be thoroughly removed from internal cavities.
  • Warping & Large Flat Surfaces: Large, thin, flat planes are prone to thermal warping as they cool. To maintain dimensional accuracy, avoid expansive flat surfaces or incorporate structural ribs to increase rigidity and distribute thermal stress evenly.
  • Interlocking Parts & Clearance: SLS allows for “print-in-place” moving assemblies. Maintain a minimum clearance of 0.5 mm between interlocking components to prevent the radiant heat from fusing them together during the laser sintering process.

SLS 3D Printing Materials

Our material selection includes plastic and metal options like ABS, PA (Nylon), Aluminum, and Stainless Steel, suitable for various industrial custom 3D printing projects. If you have unique material requirements, simply choose ‘Other’ on our quote configuration page. We’re committed to sourcing exactly what you need.

Global Manufacturing Network for 3D Printing

RapidDirect provides industrial-grade on demand 3D printing services supported by a global manufacturing network. Our production 3D printing capacity enables us to handle everything from rapid 3D printing prototypes to large-volume production parts with consistent quality.

With access to advanced industrial 3D printing equipment and standardized quality control systems, we support complex geometries, tight tolerances, and reliable lead times across multiple industries.

300+

Machines Set

120+

Countries Shipped

20,000+

Customers Served

RapidDirect
Online 3D Printing Service Solutions

3D Printing

Start your project with our rapid 3D printing service. Ideal for creating detailed prototypes and custom parts quickly, we use advanced technologies to deliver high-quality, high-resolution prints with precise tolerances. 

  •  Iterate and refine your designs rapidly to ensure perfect results.
3d-printing-design-validation

Vacuum Casting

Our urethane casting service bridges the gap between prototyping and mass production. Perfect for low to medium-volume production, creating durable, high-quality parts with excellent surface finish and detail.

  • For market testing and initial product launches.
vacuum-casting-for-prototyping

Injection Molding

For large-scale production needs, our injection molding service is the optimal choice. It is capable of producing high volumes of parts efficiently, maintaining consistent quality and precision. 

  • Cost-effective process for mass production.
injection-molding-for-production

RapidDirect
3D Printing Capabilities

We provide a comprehensive overview of each rapid 3D printing process’s unique standards, aiding in informed decisions for your printing needs.

SLAMJFSLSSLM
Min. Wall Thickness0.6mm for unsupported walls, 0.4mm for supported walls on both sidesAt least 1mm thick; avoid overly thick wallsFrom 0.7mm (PA 12) to 2.0mm (carbon-filled polyamide)0.8 mm
Layer Height25 µm to 100µmAround 80µm100–120 microns30 – 50μm
Max. Build Size1400x700x500mm264x343x348mm380x280x380mm320x320x400mm
Dimension Tolerance±0.2mm (For >100mm, apply 0.15%)±0.2mm (For >100mm, apply 0.25%)± 0.3mm (For >100mm, apply 0.35%)±0.2mm (For >100mm, apply 0.25%)
Standard Lead Time4 business days5 business days6 business days6 business days
Surface Finish (Ra)Normal: 3.2μm
After polishing: 1.6μm
3.2–6.3μm
(No secondary processing for nylon)
3.2–6.3μm
(Polishing/grinding available)
3.2–6.3μm
(Polishing/grinding available)
rapid direct Platform
Get an Instant
3D Printing Quote Online

Upload your CAD files to get an instant 3D printing quote online. Our automated quoting system analyzes your design, material selection, and production requirements in seconds, providing transparent pricing and lead times.

As a professional online 3D printing service company, we support plastic and metal 3D printing for prototypes and production parts. Simply upload your STP, STEP, STL, or other 3D files to receive a custom 3D printing quote tailored to your project specifications.

instant-quote-3d-printing

3D Printing Service
for Various Industries

3D printing is ideal for precision assembly components (via as-machined post-processing) and high-aesthetic visual parts (via painting/polishing).

We provide industrial 3D printing services tailored to the requirements of regulated and high-performance industries.

Our experience spans automotive, aerospace, and medical applications—from prototyping to low-volume production.

Why
Choose Us

RapidDirect is a trusted provider of industrial 3D printing services, helping engineers and manufacturers produce high-quality parts with precision, speed, and reliability.
/01
High Resolution
3D Prints

Advanced materials, cutting-edge technology, and stringent quality control processes. This commitment results in quality product durability and precision, minimizing rework and enhancing your project’s success.

/02
Fast Turnaround 3D Printing

Streamlined processes and state-of-the-art equipment, addressing your urgent needs by delivering high-quality 3D printed items quickly. This efficiency reduces wait times, enhancing your project’s pace and productivity.

/03
Experienced 3D Printing Experts

We have team of experienced engineering experts providing personalized guidance for every project. Resolve complex design challenges, enhancing print success and customer satisfaction, according to your unique specifications.

What’s SLS 3D Printing?

SLS (Selective Laser Sintering) is a versatile polymer 3D printing process that uses a high-power laser to sinter powdered thermoplastic materials layer by layer into functional parts. Unlike other processes, SLS requires no support structures, enabling the creation of complex geometries, moving assemblies, and internal features in a single build.
what is sis

Advantages of SLS 3D Printing

Online SLS 3D printing service has many advantages over traditional methods:

  • No support structures required: Builds complex geometries, undercuts, and moving parts without additional support material, reducing post-processing time and waste.
  • Functional, durable thermoplastic parts: Produces parts with good mechanical strength, heat resistance, and chemical stability, suitable for functional testing and end-use applications.
  • Design freedom & complexity: Enables the creation of intricate lattices, internal channels, and snap-fit assemblies that are difficult to achieve with injection molding or CNC machining.
  • High material efficiency: Unused powder can be recycled, minimizing material waste and supporting cost-effective low-volume production.

SLS 3D Printing Applications

Our online SLS 3D printing services offers a wide range of applications for different types of parts:

  • Functional prototypes & testing: Durable prototypes for fit, form, and functional testing in product development.
  • Custom consumer goods: Custom components, enclosures, and mechanical parts for consumer products.
  • Aerospace & defense components: Lightweight, high-performance parts for aerospace interiors and unmanned systems.
  • Industrial tooling & jigs: Custom manufacturing aids, jigs, and fixtures for assembly and production lines.

FAQs

Standard tolerance is ±0.2mm (with scaling for large parts), and an upgraded process offers ±0.05mm precision for select technologies.

3D printing can achieve remarkably high levels of accuracy, ensuring that your parts meet stringent specifications. At RapidDirect, our standard tolerance for 3D printing is ±0.1mm. However, the exact tolerance can vary depending on the complexity and design of your part. For highly detailed or intricate components, tolerances might need to be adjusted to ensure optimal results. To provide you with the most accurate assessment, you can upload your 2D design files through our platform. Our expert team will evaluate your design and determine the specific tolerances required to achieve the best possible outcome for your project.

The time required to 3D print parts depends on several key factors, including part size, height, complexity, and the chosen printing technology. Larger or more complex parts naturally take longer to print than smaller, simpler ones. At RapidDirect, we understand the importance of fast turnaround times. Leveraging advanced 3D printing technologies and efficient processes, we can complete many 3D printing projects in as little as one day. For precise time estimates tailored to your specific project, you can upload your design files, and our team will provide a detailed timeline based on your unique requirements.

It depends on the specifications of the 3D printer used. At RapidDirect, we offer a wide range of 3D printing machines to accommodate various sizes and requirements.

  • Large Format FDM Printers: Capable of printing up to 36 x 24 x 26 inches, ideal for large parts and prototypes.
  • Large SLA Printers: Can produce prints up to 29 x 25 x 21 inches, perfect for high-detail and smooth-surface applications.
  • SLS Printers: Unfilled SLS machines have a maximum build dimension of 13 inches, while glass-filled SLS machines can handle up to 26 x 15 x 23 inches.
  • Industrial Polyjet Printers: Offer a build area of up to 19 x 15 x 7 inches, suitable for high-resolution and multi-material prints.

This diverse selection ensures we can meet your project’s specific size and detail requirements.

At RapidDirect, we accept a variety of file formats to ensure compatibility with our 3D printing systems. The recommended file formats are STEP (.stp) and STL (.stl), as they provide the best accuracy and detail. If your design file is in a different format, we advise converting it to either STEP or STL to ensure optimal results. These formats preserve the geometric data and intricate details necessary for precise and high-quality prints. Should you need assistance with file conversion or have questions about specific formats, our support team is always ready to help.

The cost of our 3D printing service depends on several factors. These include the type of 3D printer chosen, the size and design complexity of the model, the material used, and the volume of parts required. Larger and more intricate designs typically require more resources and time, influencing the overall cost. Material choice also plays a significant role; different materials vary in price based on their properties and suitability for specific applications. At RapidDirect, we provide detailed quotes tailored to your project’s specifications. Understanding these variables helps you manage capital effectively while achieving high-quality results.

Choosing the right 3D printing technology depends on your project’s specific requirements. Consider factors such as the desired material, part complexity, surface finish, strength, and budget. For high-detail and smooth finishes, SLA is ideal. For strong, functional parts, SLS or HP MJF might be better suited. FDM is great for large, durable parts at a lower cost, while SLM is perfect for high-strength metal components. Consulting with our 3D printing experts can help you make an informed decision. Provide your design specifications, and we’ll recommend the best technology to meet your needs efficiently and cost-effectively.

Try RapidDirect
now, for free
Book a meeting with RapidDirect
Note: Our working hours are 10:00-12:00, 14:00-18:30, and 20:00-23:00. We will confirm the time and meeting method with you via email.
Drag & Drop Files, Choose Files to Upload You can upload up to 50 files.