Setting Up Your Design for Single Line Etching or Single Line “No Kerf” Through-Cuts

Single line etching with no kerf

Table of Contents

Here at SendCutSend, we have a few special services available for eligible laser cut materials – single line etching (this is not engraving), and single line “no kerf” through cutting (i.e., no kerf compensation).

In this guide, we’ll explain the characteristics and limitations of these services and how to set up your 2D vector file before placing an order. This will help your parts move into our production queue more smoothly.

Please note, designs with single line etching and no kerf cut features cannot receive finishing services.

Preliminary setup for these services is only possible in CAD programs. If you’re designing in Adobe Illustrator or Inkscape, please leave a note before checkout indicating that parts in your order are in need of etching or no kerf cut features. SendCutSend’s Support team will take care of it! However, we strongly recommend designing parts that require these special services in CAD programs such as Fusion 360, SolidWorks, or QCAD

Services

Single Line Etching

Single line etching is a service we can provide upon request for parts in the following laser cut materials:

Please note, single line etching has a faint appearance that is best suited for part numbers and crosshair markings, not cosmetic applications. 

Single line etching with no kerf

Also, if we etch a part, we won’t be able to deburr it since deburring will erase the faint etch. 

We have more information and examples of what to expect here: Single Line Etching – SendCutSend

Single Line “No Kerf” Through-Cuts

We can provide “no kerf” cut features upon request in any laser cut material

A single line “no kerf” through-cut refers to open cut geometry that will be the width of the laser’s cut path, because it does not form a closed shape. 

Because the shape is not closed, there will be no kerf compensation for the cut, hence the name “no kerf” cut. 

In the example below, the red paths are no kerf cuts. 

Example of no kerf cuts displayed by red lines

Learn more about kerf and kerf compensation.

Pierce Points & Width

For single line no kerf cuts, there will be a visible pierce point where the laser begins the cut. In thinner materials the cut width is typically 0.008″ – 0.015″ wide, and the pierce point can be between 0.015″ – 0.030″ wide. 

With thicker materials between 0.375″ – 0.500″ the cut width can be 0.015″-0.040″ wide with a pierce point between 0.030″ – 0.080″ wide. 

Here is an example of typical pierce points:

Example of pierce points in laser cutting

Design Considerations

We cannot control where the laser will start each cut. If you order the same part more than once, the pierce point locations can be different each time.

We’ll need a node/anchor point to separate the paths where they intersect with normal cut geometry such as the part profile, like this:

Example of no kerf nodes

These cuts will need to be the Min Bridge Size apart for the material and thickness chosen. 

You can find the Min Bridge Size value for your material on the individual info page at our materials directory

A link to SendCutSend material pages on website

Once you’ve navigated to the specific material info page, scroll down to the Material Details section and click the desired stock thickness tab on the left. 

How to select material thickness on SendCutSend

With the correct thickness selected, scroll down to the Design Considerations, where you’ll see Min Bridge Size. This value represents the smallest wall thickness or material left between cutouts that we can cut cleanly and reliably. 

SendCutSend design considerations

The dimension shown below is an example of a measured “bridge” thickness. 

Example of bridge thickness

Setting Up Your Design


Essentially, you’ll need to move all normal cut paths onto one layer, and any etched or no-kerf paths onto a separate layer specifically named for the geometry required.

Then you’ll need to leave a note before checking out indicating which items are in need of special services.

Process

If your CAD program allows for layer creation and naming, you should be able to follow these steps. We also have a guide specifically for SolidWorks users who need to export a DXF with no-kerf cuts. You can follow the guide to set your file up for single line etching, too; just name the layer SCS_SLE instead of SCS_NOKERF.

If your CAD program does not allow for flexibility with layer creation and naming, we recommend QCAD since it is a free, well documented DXF editor. We have a thorough guide explaining how to download QCAD, set up your workspace, and learn some of QCAD’s most useful features.

Once you are set up with your CAD program of choice, 

  1. Move all cut geometry to one layer and delete any superfluous layers
Single line etch laser gun setup step 1

2. Create a separate layer named SCS_SLE or SCS_NOKERF.
If your design includes both types of geometry, create both additional layers.


3. Move the paths to be etched or through-cut onto the SCS_SLE (single line etch) or SCS_NOKERF (through-cut) layer.

moving SLE kerf layers
SLE no kerf layer

4. Any text or numbers will need to be exploded or expanded into paths if they are not already.

For example, in QCAD, you can select a text object with the cursor (keyboard shortcut QQ) and then press XP twice to explode the text and convert it to paths.

Example of text object in QCAD

In QCAD, the Selection identifier in the Property Editor (GP) will also change from Text to Polyline.

Changing from text to Polyline in SLE

5. Once your design file has the geometry separated into the appropriate layers, you can save it and upload your drawing to SendCutSend’s instant pricing tool

Placing Your Order

Checking the Preview

After uploading your files to our instant pricing tool or your SendCutSend account, you can check to see if your files are set up correctly by viewing the 3D preview of your parts. 

You can access this by clicking the preview image on each part.

If your design with etching is set up correctly, any SLE (single line etch) geometry will show as a surface feature in the preview. You can toggle the 3D switch at the bottom to see it.

Toggling to 3D in SendCutSend preview

If you set the no kerf file up correctly, the geometry will preview as through-cut features.

No kerf preview in SendCutSend

Add To Cart

For each design, click Add To Cart and choose your material and any additional services needed before proceeding to add the parts to your cart.

Leave an Order Note

Click View Cart to review your shopping cart and Address & Billing information.

Leave an order note indicating that which items are set up for single line etch and no-kerf cut services.

This will ensure that special attention is paid to your order. SendCutSend’s Support team will double check to make sure your files are set up correctly and receive the services you have requested. 

Once you’ve added the note, you can proceed to the final steps and place your order! If there are any questions or concerns, the Support team will be in touch to ensure we have all the details correct. 

A Fine Line

Whether you have a uniquely creative idea for no kerf cuts or need to differentiate identical parts in similar-looking materials with single line etching, these services can be great solutions to certain design problems. As soon as you’re ready to try single line geometry, upload your newest drawing to our website for a quote!

Preflight Checklist

Before you upload your design files, be sure to go through our pre-flight checklist:

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We proudly use hardware by PEM

Flush Standoff, 4-40, .250" Zinc plus Clear Chromate

Aluminum: 5052, 6061, 7075 Steel: Mild, G30

SKUSO-440-8
Thread Size4-40 x .250″
Hole size in sheet (+0.003/-.0.000).168″
Minimum sheet thickness0.040″
Maximum sheet thickness.125″
Fastener materialSteel
Minimum distance hole C/L to edge0.230″
When determining the distance between two or more fasteners, you can calculate the distance by the formula, C/L to edge + 1/2 the diameter of the second mounting hole..345″
Recommended panel materialSteel/Aluminum
Coating typeZinc
Length.250″
Aluminum material ranges (5052, 6061, 7075)0.040″-0.125″
Steel material ranges (CRS, HRPO, HR)0.048″-0.119″

We proudly use hardware by PEM

Flush Standoff, 4-40, .250" Passivated

Stainless Steel: 304, 316

SKUSO4-440-8
Thread Size440
Hole size in sheet (+0.003/-.0.000).166″
Minimum sheet thickness0.04″
Maximum sheet thickness.125″
Fastener material400 Stainless Steel
Minimum distance hole C/L to edge0.230″
When determining the distance between two or more fasteners, you can calculate the distance by the formula, C/L to edge + 1/2 the diameter of the second mounting hole. Example shown with x2 of the same hardware..313″
Recommended panel materialStainless Steel
Coating typePassivated
Length.250″
304 Stainless Steel material ranges0.048″-0.125″
316 Stainless Steel material ranges0.060″-0.125″