About SLS Nylon

SLS (Selective Laser Sintering) uses a laser to shape and form extremely thin layers of powdered material by melting it together one-by-one to create a solid structure.

The advantage of this process is that the excess unmelted powder acts as a support to the structure as it is being produced which allows for complex shapes to be made and no additional supports are required.

Example parts

SLS Nylon

Strengths

  • Functional prototypes and end products
  • Complex designs with intricate details
  • Moving and assembled parts
  • Cases, holders, adapters

Limitations

  • Cavities within design (unless making use of escape holes)

Design rules to remember when printing with SLS Nylon

SLS design rule: Embossed and engraved details

Embossed and engraved details

0.5 MM

For embossed and engraved details, we recommend a minimum line thickness of 0.5 mm and a depth of 0.5 mm.

Tip: if you are putting text on your design, use a bold sans-serif font for readability, such as Arial Bold.

SLS design rule: Escape holes

Escape holes

4 MM DIAMETER FOR ONE ESCAPE HOLE, 2 MM FOR TWO OR MORE

As SLS Nylon is built up from powder, all the cavities in your design will be filled with powder. It’s a good idea to hollow your model to save costs and add some holes for the powder to escape.

Tip: having multiple holes makes it easier for the powder to escape, as we can carefully blow air through you model.

SLS design rule: Minimum detail size

Minimum detail size

0.2 MM

Selective Laser Sintering is one of the 3D Printing processes with the highest accuracy; up to 0.2mm is enough to create clearly visible details.

Tip: if you are putting text on your design, use a bold sans-serif font for readability, such as Arial Bold.

SLS design rule: Minimum feature size

Minimum feature size

0.8 MM (OR 1 MM IF CONNECTED JUST ON ONE SIDE)

The minimum feature size for printing with SLS Nylon is 1 mm. If your feature is a thin wire connected on both sides, you can go slightly thinner to 0.8 mm, otherwise we recommend at least 1 mm thickness.

SLS design rule: Moving or interlocking parts

Moving or interlocking parts

0.5 MM CLEARANCE BETWEEN PARTS

A powerful feature of SLS Nylon is that you can have moving parts printed in one go. In order for the parts to come loose you need to keep a 0.5 mm clearance.

Tip: if you have moving parts like axles or hinges over a long distance you need to increase your clearance or create extra escape holes for the powder to get out.

SLS design rule: No supports needed

No supports needed

SLS Nylon is printed by fusing together Nylon powder with a laser. The powder acts as support material while building up your print, therefore no support structure is needed, providing you with maximum form freedom.

SLS design rule: Wall thickness

Wall thickness

1 MM (0.8 MM IN SMALLER OBJECTS)

The 3D model's wall must be thick enough to support the model. We recommend with working with 1.0mm for larger objects, in smaller objects you can have lower wall thickness of 0.8 mm.

SLS Nylon is printed using Selective Laser Sintering (SLS) technology

or Multi Jet Fusion 3D printing process. The advantage of this process is that the powder acts as a support to the structure as it is being produced which allows for complex shapes to be made.

Parts come out strong and slightly flexible due to the way the layers are bonded.

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