All Purpose Razor Blade Scraper

Securely holds replaceable plastic and metal scraper blades. Includes both ergonomic and easy-to-print models.
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updated October 20, 2024

Description

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This tool securely holds replaceable plastic and metal scraper blades.  In addition to cleaning plastic or resin from 3D print beds, it can remove tape, stickers, dried residue, flaky paint or coatings, gaskets, …  It is also great at scraping algae off aquarium glass.  

Which Version?

There are several versions of the scraper to fit your specific needs.  The standard version leaves 6 mm of the blade exposed, and the extended blade version leaves 9 mm (half) of the blade exposed.  

The ergonomic handle version is the nicest to use, but requires supports.  The simple handle (in the zip files) has a rod-shaped handle that comes in multiple lengths labeled by overall length, and prints without supports.  

Supplies

You will need

  • 40 mm x 18 mm x 1.2 mm blade (either plastic or metal)
  • M3 square nut (DIN 562)
  • M3x6 BHCS (button head cap screw) for the ergonomic handle
  • M3x8 BHCS for the simple handle

Instead of using a tool-less friction fit, I made a design that actively clamps the blade into place.  As long as you have a matching blade size and reasonable printing tolerances, it should not come loose.  If the blade is too thin and is not clamped securely, try adding thickness with tape.  

Hanger

There is a magnetic hanger for the ergonomic handle models.  I made it to keep my scraper in a handy location on my tool cabinet.  Glue the two magnets into place.    

  • (2) 6 mm x 3 mm magnets

Fuzzy Skin Grips

You can add fuzzy skin to give your handle sides a customized grip!  Here are directions for PrusaSlicer:

  1. Open the 3mf file and select Yes to load it as a single object with multiple parts.
  2. Right click on the Fuzzy Skin Right/Left part in the side bar, select Change type, and select Modifier.
  3. Right click again on Fuzzy Skin Right/Left in the side bar and select Add settings.  Then select Fuzzy Skin and enable each setting.  (I used 0.3 mm for point distance and thickness.)

Supports

You need to add supports when printing the ergonomic handle.  The 3D model comes pre-oriented to minimize the amount of supports needed, and only overhangs less than 45 degrees need support.  I recommend using the smallest Top contact Z distance that you can along with Snug supports for the best looking, flattest surface.

Safety

Please use common sense to avoid cutting yourself or other people.  You will also need to consider the strength of a 3D print to avoid breaking the handle.  The strength of your scraper varies greatly depending on your choice of filament, slicer settings, and printer tuning.

Thanks for visiting, and enjoy!

Minor update: Added magnetic hanger for ergonomic handle.  

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The author marked this model as their own original creation.

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