Custom Gridfinity Cutout Bin Best Practices: Fit, Finger Holes, Inserts, and Test Prints

A useful custom Gridfinity cutout Bin is more than a tool-shaped pocket. It needs the right fit, enough room to remove the tool, and a layout that uses drawer space and printing material efficiently.

Whether you build the model manually in CAD or use a dedicated tool, these are the practical design decisions worth considering before you start a full print.

1. Start with an Accurate Outline

The pocket can only be as accurate as the outline used to create it.

Check the outline against the real tool whenever possible. Make sure the overall shape is correct and the dimensions match the physical object before building the rest of the Bin.

2. Add Clearance

The pocket should be slightly larger than the tool. This difference is the clearance between the printed wall and the real object.

• Too little clearance can make the object difficult or impossible to insert.
• Too much clearance can make the tool move around inside the pocket.

The final fit also depends on printer calibration, material shrinkage, layer settings, and the shape of the object. Use at least 0.2 mm of clearance. In most cases, 0.5 mm or more is a better starting point.

3. Add Finger Holes

A finger hole gives you access beside the object so you can lift it out of the pocket. It is worth including in most cutout Bins: even a tool that is normally easy to hold can be difficult to grasp once it sits inside a close-fitting pocket.

Place the finger hole where your finger can naturally reach the object. Check that it does not collide with a neighboring pocket, another finger hole, or the Bin wall.

4. Use a Contrast Insert as a Visual Check

A Contrast Insert is a separate thin printed part that sits at the bottom of the pocket. When printed in a contrasting color, it makes an empty tool position immediately visible and acts as a visual reminder to return the tool after use.

This is particularly useful for tool drawers and shared workspaces, where you want to see at a glance whether something is missing.

5. Consider a Partial Bin for Irregular Tools

Not every tool needs a full rectangular footprint. For an irregularly shaped object, remove grid cells that the object and the Bin structure do not need.

This Partial Bin approach can reduce material use and free space on the baseplate for other Gridfinity Bins.

6. Print a Test Piece Before the Full Bin

Before printing the complete Bin, make a thin test layer containing the cutout. It uses far less time and material than a full Bin and lets you check whether the opening is the correct size.

Print it and place the real object into the opening:

• If the fit is too tight, increase the clearance around the outline.
• If the fit is too loose, reduce the clearance.
• If one side is noticeably wrong, check the source outline. If it came from a photo, look for camera tilt or a visible side surface.
• If the entire outline is the wrong size, check the dimensions or calibration settings used to create it.

A successful test confirms the 2D outline and clearance.

ShapeAny Brings All These Steps Together

Designing a custom cutout Bin manually means tracing the tool, checking its real size, adding clearance, building the Gridfinity geometry, planning finger access, creating optional inserts, and preparing a test piece.

ShapeAny brings those steps into one workflow. Upload a top-down photo to create a true-size Shape, generate a custom Gridfinity cutout Bin, adjust practical options such as finger holes, Contrast Insert, and Partial Bin, then download an STL package containing:

• The complete Gridfinity Bin STL
• A 0.4 mm Test Print STL
• A separate Contrast Insert STL, if Contrast Insert is enabled

Print the Test Print first, make any necessary clearance adjustment, and only then print the complete Bin. This short check is the simplest way to avoid wasting the time and material required for a full reprint.

For the complete ShapeAny workflow, see How to Quickly Make a Gridfinity Cutout Bin from a Photo.