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7 PIECE 3X3 - RHOMBIC TRAPEZOHEDRON PUZZLE

RTRAP_large.gif 7 PIECE 3X3 - RHOMBIC TRAPEZOHEDRON PUZZLE
PXL_20230916_030509377.jpg 7 PIECE 3X3 - RHOMBIC TRAPEZOHEDRON PUZZLE
P1_RTRAP_P7_3x3_R5897796_TL_S10_Cl0.07.stl 7 PIECE 3X3 - RHOMBIC TRAPEZOHEDRON PUZZLE
P2_RTRAP_P7_3x3_R5897796_TL_S10_Cl0.07.stl 7 PIECE 3X3 - RHOMBIC TRAPEZOHEDRON PUZZLE
P3_RTRAP_P7_3x3_R5897796_TL_S10_Cl0.07.stl 7 PIECE 3X3 - RHOMBIC TRAPEZOHEDRON PUZZLE
P4_RTRAP_P7_3x3_R5897796_TL_S10_Cl0.07.stl 7 PIECE 3X3 - RHOMBIC TRAPEZOHEDRON PUZZLE
P5_RTRAP_P7_3x3_R5897796_TL_S10_Cl0.07.stl 7 PIECE 3X3 - RHOMBIC TRAPEZOHEDRON PUZZLE
P6_RTRAP_P7_3x3_R5897796_TL_S10_Cl0.07.stl 7 PIECE 3X3 - RHOMBIC TRAPEZOHEDRON PUZZLE
P7_RTRAP_P7_3x3_R5897796_TL_S10_Cl0.07.stl 7 PIECE 3X3 - RHOMBIC TRAPEZOHEDRON PUZZLE
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  • P1_RTRAP_P7_3x3_R5897796_TL_S10_Cl0.07.stl
  • P2_RTRAP_P7_3x3_R5897796_TL_S10_Cl0.07.stl
  • P3_RTRAP_P7_3x3_R5897796_TL_S10_Cl0.07.stl
  • P4_RTRAP_P7_3x3_R5897796_TL_S10_Cl0.07.stl
  • P5_RTRAP_P7_3x3_R5897796_TL_S10_Cl0.07.stl
  • P6_RTRAP_P7_3x3_R5897796_TL_S10_Cl0.07.stl
  • P7_RTRAP_P7_3x3_R5897796_TL_S10_Cl0.07.stl
  • RTRAP_P7_3x3_R5897796_TL_S10_Cl0.05.zip
    • RTRAP_P7_3x3_R5897796_TL_S10_Cl0.05_P1.stl
    • RTRAP_P7_3x3_R5897796_TL_S10_Cl0.05_P2.stl
    • RTRAP_P7_3x3_R5897796_TL_S10_Cl0.05_P3.stl
    • RTRAP_P7_3x3_R5897796_TL_S10_Cl0.05_P4.stl
    • RTRAP_P7_3x3_R5897796_TL_S10_Cl0.05_P5.stl
    • RTRAP_P7_3x3_R5897796_TL_S10_Cl0.05_P6.stl
    • RTRAP_P7_3x3_R5897796_TL_S10_Cl0.05_P7.stl
  • RTRAP_P7_3x3_R5897796_TL_S10_Cl0.09.zip
    • RTRAP_P7_3x3_R5897796_TL_S10_Cl0.09_P1.stl
    • RTRAP_P7_3x3_R5897796_TL_S10_Cl0.09_P2.stl
    • RTRAP_P7_3x3_R5897796_TL_S10_Cl0.09_P3.stl
    • RTRAP_P7_3x3_R5897796_TL_S10_Cl0.09_P4.stl
    • RTRAP_P7_3x3_R5897796_TL_S10_Cl0.09_P5.stl
    • RTRAP_P7_3x3_R5897796_TL_S10_Cl0.09_P6.stl
    • RTRAP_P7_3x3_R5897796_TL_S10_Cl0.09_P7.stl

Learn more about the formats
Publication date 2023-09-15 at 16:02
Design number 1452347
wormsquiggle

wormsquiggle

3D printer file info

3D model description

Solving Difficulty: Hard
Printing Difficulty: Medium

3D packing puzzle based on Rhombic Dodecahedron cells that have been sub-divided into 4 trapezohedrons. This puzzle stays together by itself and only comes apart with the tricky three way motion shown.

The sub-group of three pieces also requires three way motion to come apart, making this a very interesting puzzle to solve. It is one of my favorites!

If the tolerances are right, the puzzle can be rapidly disassembled by throwing it slightly in the air with a spin :)

Default puzzle height is about 42mm. There are three different models included with different clearance amounts. I found the 0.07mm clearance (per piece) worked well for my printing setup.

Note that scaling the model will also scale this clearance amount.

Let me know if you would like different clearance values and I can add them here.

3D printing settings

Supports required for four of the pieces.

The stl files are oriented in the intended printing direction (with z pointing upwards)

Printing with a raft is recommended for greater dimensional accuracy. It can prevent the bottom layers squishing and causing the z dimension to be off

I usually have to use a craft knife to clean up the surfaces with supports and other areas of imperfections in order for the pieces to fit together nicely.

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