DIY Bullnose Props: Precision Cuts Every Time

Make precision bullnose props using tools you [probably] already have. This method is quick. It's easy. And it gives consistent results while leaving a clean edge that requires little dressing for a smooth finished tip.

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My original thought was to get one of the 3D-printed jigs I've seen for doing this, or try to build my own jig from metal or wood when it dawned me (in a very 'well duh!' moment) that I already had everything I needed. As an aside, I prefer this method over fixed jigs because it allows you to create any length you want -- I've since used this same setup to cut down some 11-inchers to 10-inch for my XuGong.

It should be pointed out that the single most important component of this method is the cutting bit. I've seen people recommend the Dremel #569 tile grout removal bit and the Dremel #562 tile cutting bit but to be honest, neither of those is suitable for cutting the type of soft plastic used in multirotor props. The problem is those bits aren't designed to 'cut ' material, they're designed to 'grind' it away and applying them to a plastic prop just leaves the edge frayed and ragged.

What's need is something that actually cuts — or in this case 'shaves' away the plastic — so that the finished edge is relatively smooth and free of burrs and a helical cutter like the Dremel #9901 Tungsten Carbide Cutter nicely fills that requirement. Once cut to length the prop tips can then be easily clean-up with 150 grit Wetordry sandpaper and water (this type of sandpaper is normally found in automotive supply stores in the paint section).

Thanks for watching!

=)

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RESOURCES

If you want to learn more about bullnose props I highly recommend Bruce Simpson's video over at RC Model Reviews:
https://youtu.be/5AYpF2L0KG0

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Видео DIY Bullnose Props: Precision Cuts Every Time канала CradyLab