Precision Scraper with Magnetic Handle

Precision Scraper with Magnetic Handle for 3D Printer Build Plates

When my first Bambu Lab printer arrived about six months ago, I noticed that a blade was included in the kit—it was meant to be used for printing a scraper and using it afterward. But I didn’t even look at it, just tossed it into the box and forgot about it.

Then, when my second printer recently arrived—and again, the blade was included among the accessories—I thought it was finally time to print a scraper. At first, I assumed it was just some cheap stamped blade. But as it turned out, it’s actually a very well-designed blade. Properly sharpened. So I started designing my own scraper, since the other versions I’d seen from different creators didn’t quite satisfy me. Plus, I didn’t want to waste time on a poorly made scraper.

And yes, there’s something very important I want to share—something you really should know. Logically, many scrapers are assembled with the bevel facing down—like on a hand plane. But in this case, that’s absolutely wrong. The bevel must face up. Here’s why: if you mount the blade with the bevel down, you’ll end up shaving off material from your build plate. You’ll be damaging it every time you use the scraper. That’s why I approached this part with extra care—used feeler gauges, and triple-checked the gap after printing my third prototype. I made sure the blade sat perfectly parallel and had just enough surface contact to be effective—without damaging the coating on the build plate.

Now about the printing process. As you may have noticed, I used the Bambu Lab logo. But if you’re printing with a standard 0.4 mm nozzle—don’t even try. Just recolor the handle as a single color in the slicer. I printed mine using a 0.2 mm nozzle with minimum layer height to get this level of detail in the lettering, logo, and other small features. You won’t get the same result with a 0.4 mm nozzle.

Also, the print includes a pause at layer 55. That’s where you insert a 10 mm diameter, 4 mm thick magnet. After that, printing resumes. The pause happens about 1 hour and 12 minutes before the print finishes. But if you don’t need the magnet, you can simply close off the cavity with supports and remove the pause in your slicer.

The blade is mounted from the bottom using M2.5 screws, along with heat-set inserts—also M2.5. The insert diameter is 3 mm at entry, 4 mm outer diameter, and 2.5 mm thick. I used very low-profile screws, total length 6 mm including the head—but 5 mm also works.

The scraper turned out to be excellent quality, and I really liked using it. I’ve shown all assembly steps in the video—you can check it out.

See the video for details:

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Precision Scraper with Magnetic Handle for 3D Printer Build Plates