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Bosch RM 3 Professional replacement foot — image 1
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Bosch RM 3 Professional replacement foot

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Bosch RM 3 replacement foot + leg, compatible with stock. Uses M11x1.5 threads

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Category
Electronics
License
Open Community License v1.1 + General Attribution v1

Bosch RM 3 professional replacement foot + leg, compatible with stock.

The stock ones use M11x1.5 threads and so you will need special tools for that, I found M10 and M12 taps and dies readily available locally but since this uses M11x1.5 I had to buy a thread repair set from Biltema, article number 19-1218. PETG will require post processing by repairing the threads using thread tools while PLA worked without post processing, though I'm unsure about the strength.

I used 100% infill for the "leg" (male threads), as far as I could see it didn't really matter much in terms of print speed as it's not very hollow, you can probably skip a bit on the "foot" (female threads) because it has a cone in the bottom where it touches the ground which is hollow. If you print the "leg" with PETG you WILL need a brim, I tried multiple times but it just loosened from the build plate)

This is designed to be fastened to the RM 3 "base" with a heat insert M3 nut and screwed in place with a M3x~25mm screw, I used one of the spares I had from building my Prusa Core One Plus

As of now the tip of the "foot" is just plain plastic, you could probably do some MMU magic and use TPU for the tip, either that or do some plasti dip, I haven't tested anything though

This is my first model that I've made, I hope it's useful for anyone else in this situation, supplied with this are the .FCstd files for FreeCAD (which was used to model)

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