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Round-to-Rectangular Tube Adapter STL file ⌀81 mm to 120×70 mm, thickness 2 mm 📦#2668

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3D file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀81 mm and a rectangular section with internal dimensions 120×70 mm. The wall thickness is 2 mm and the total length is 110 mm.
Generation date: 2025-10-22
3D Model Round-to-Rectangular Tube Adapter STL file ⌀81 mm to 120×70 mm, thickness 2 mm

3D model download

Free
  • round-to-rectangular-adapter-d_model2668-nb0_dd{id}.stl : 1.2 Mo
STL Mesh quality : Linear deflection 0.0005 Angular deflection 0.05
No compliance warranty No compliance warranty
(Internal and private use, non-commercial – no distribution – no derivatives)
Safe download

Values for this model

This model was generated by the Round to rectangular adapter template, with the following values:
Parameter Value
#1 cylinder outer diameter 81 mm
#2 cylinder inlet length 10 mm
#3 rectangle internal length 120 mm
#4 rectangle internal height 70 mm
#5 rectangle inlet length 5 mm
#6 offset Z 0 mm
#7 offset Y 0 mm
#8 total length 110 mm
#9 thickness 2 mm
#10 chamfer no chamfer
illustration of the parameters
Representation of the parameters

  • If the chamfer option on the ends is enabled, the chamfer length is equal to half the thickness.
  • The stop at the bottom of the rectangular section has a width equal to half the thickness.

Labels are used in the naming of the downloaded 3D files.

Parameter Label
#1 cylinder outer diameter diaC
#2 cylinder inlet length lentC
#3 rectangle internal length lenIR
#4 rectangle internal height heiIR
#5 rectangle inlet length lentR
#6 offset Z ofsZ
#7 offset Y ofsY
#8 total length lenT
#9 thickness thi
#10 chamfer cha

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Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 119×72 mm, thickness 2 mm (📦 #2600)

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Parameter Value Unit
cylinder outer diameter 100 mm
cylinder inlet length 20 mm
rectangle internal length 119 mm
rectangle internal height 72 mm
rectangle inlet length 20 mm
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Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 119×68 mm, thickness 2 mm (📦 #2603)

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Parameter Value Unit
cylinder outer diameter 100 mm
cylinder inlet length 20 mm
rectangle internal length 119 mm
rectangle internal height 68 mm
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offset Y 0 mm
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thickness 2 mm
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Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 60×60 mm, thickness 2 mm (📦 #1534)

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Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 60×60 mm, thickness 2 mm
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Parameter Value Unit
cylinder outer diameter 100 mm
cylinder inlet length 25 mm
rectangle internal length 60 mm
rectangle internal height 60 mm
rectangle inlet length 15 mm
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Round-to-Rectangular Tube Adapter STL file ⌀127 mm to 123×72 mm, thickness 2 mm (📦 #2593)

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Round-to-Rectangular Tube Adapter STL file ⌀127 mm to 123×72 mm, thickness 2 mm
Download this file in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀127 mm and a rectangular section with inner dimensions 123×72 mm. The shell thickness is 2 mm and the total length is 76 mm.
Parameter Value Unit
cylinder outer diameter 127 mm
cylinder inlet length 20 mm
rectangle internal length 123 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀124 mm to 145×69.5 mm, thickness 2 mm + offset (📦 #1967)

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Parameter Value Unit
cylinder outer diameter 124 mm
cylinder inlet length 10 mm
rectangle internal length 145 mm
rectangle internal height 69.5 mm
rectangle inlet length 8 mm
offset Z 2 mm
offset Y 2 mm
total length 50 mm
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Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 50×50 mm, thickness 2 mm
Download this 3D file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀100 mm and a rectangular section with internal dimensions 50×50 mm. The wall thickness is 2 mm and the overall length is 100 mm.
Parameter Value Unit
cylinder outer diameter 100 mm
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rectangle internal length 50 mm
rectangle internal height 50 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 50×50 mm, thickness 2 mm (📦 #1891)

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Download this 3D model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀50 mm and a rectangular section with internal dimensions 50×50 mm. The shell thickness is 2 mm and the overall length is 100 mm.
Parameter Value Unit
cylinder outer diameter 50 mm
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rectangle internal height 50 mm
rectangle inlet length 15 mm
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Round-to-Rectangular Tube Adapter STL file ⌀124 mm to 141×65.5 mm, thickness 2 mm + offset (📦 #2144)

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Parameter Value Unit
cylinder outer diameter 124 mm
cylinder inlet length 20 mm
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Parameter Value Unit
cylinder outer diameter 124 mm
cylinder inlet length 15 mm
rectangle internal length 141.0 mm
rectangle internal height 65.5 mm
rectangle inlet length 10 mm
offset Z 17.5 mm
offset Y 0 mm
total length 60 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀124 mm to 145×69.5 mm, thickness 2 mm + offset (📦 #1968)

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Parameter Value Unit
cylinder outer diameter 124 mm
cylinder inlet length 10 mm
rectangle internal length 145 mm
rectangle internal height 69.5 mm
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total length 50 mm
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Parameter Value Unit
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cylinder inlet length 15 mm
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rectangle internal height 69.5 mm
rectangle inlet length 10 mm
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total length 60 mm
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Parameter Value Unit
cylinder outer diameter 100 mm
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rectangle internal length 30 mm
rectangle internal height 30 mm
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offset Y 2 mm
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thickness 2 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 32×32 mm, thickness 2 mm (📦 #1999)

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Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 32×32 mm, thickness 2 mm
Download this 3D model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀50 mm and a rectangular section with inner dimensions 32×32 mm. The wall thickness is 2 mm and the overall length is 100 mm.
Parameter Value Unit
cylinder outer diameter 50 mm
cylinder inlet length 25 mm
rectangle internal length 32 mm
rectangle internal height 32 mm
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offset Y 0 mm
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Round-to-Rectangular Tube Adapter STL file ⌀155 mm to 123×72 mm, thickness 2 mm (📦 #2358)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀155 mm to 123×72 mm, thickness 2 mm
Download this file in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀155 mm and a rectangular section with internal dimensions 123×72 mm. The shell thickness is 2 mm and the total length is 60 mm.
Parameter Value Unit
cylinder outer diameter 155 mm
cylinder inlet length 20 mm
rectangle internal length 123 mm
rectangle internal height 72 mm
rectangle inlet length 10 mm
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offset Y 0 mm
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Round-to-Rectangular Tube Adapter STL file ⌀65 mm to 47×23 mm, thickness 2 mm (📦 #2800)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀65 mm to 47×23 mm, thickness 2 mm
Download this model in STL format of a round-to-rectangular adapter with an external diameter of ⌀65 mm and a rectangular section with inner dimensions 47×23 mm. The wall thickness is 2 mm and the total length is 50 mm.
Parameter Value Unit
cylinder outer diameter 65 mm
cylinder inlet length 24 mm
rectangle internal length 47 mm
rectangle internal height 23 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀40 mm to 100×100 mm, thickness 3 mm + offset (📦 #2016)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀40 mm to 100×100 mm, thickness 3 mm + offset
Model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀40 mm and a rectangular section with inner dimensions 100×100 mm. The shell thickness is 3 mm and the total length is 100 mm. The adapter has an offset of 1 mm along the Y axis.
Parameter Value Unit
cylinder outer diameter 40 mm
cylinder inlet length 10 mm
rectangle internal length 100 mm
rectangle internal height 100 mm
rectangle inlet length 9 mm
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offset Y 1 mm
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thickness 3 mm
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Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 100×50 mm, thickness 3 mm + offset (📦 #1754)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 100×50 mm, thickness 3 mm + offset
3D model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀100 mm and a rectangular section with internal dimensions 100×50 mm. The shell thickness is 3 mm and the total length is 100 mm. The adapter has an offset of 3 mm along the Y axis and 3 mm along the Z axis.
Parameter Value Unit
cylinder outer diameter 100 mm
cylinder inlet length 20 mm
rectangle internal length 100 mm
rectangle internal height 50 mm
rectangle inlet length 20 mm
offset Z 3 mm
offset Y 3 mm
total length 100 mm
thickness 3 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀70 mm to 60×30 mm, thickness 2 mm (📦 #1510)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀70 mm to 60×30 mm, thickness 2 mm
Download this 3D file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀70 mm and a rectangular section with internal dimensions 60×30 mm. The wall thickness is 2 mm and the total length is 80 mm. A chamfer is present on the inside of the rectangular end.
Parameter Value Unit
cylinder outer diameter 70 mm
cylinder inlet length 10 mm
rectangle internal length 60 mm
rectangle internal height 30 mm
rectangle inlet length 5 mm
offset Z 0 mm
offset Y 0 mm
total length 80 mm
thickness 2 mm
chamfer chamfer on t...

Round-to-Rectangular Tube Adapter STL 3D file ⌀80 mm to 80×80 mm, thickness 3 mm (📦 #1527)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀80 mm to 80×80 mm, thickness 3 mm
3D model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀80 mm and a rectangular section with inner dimensions 80×80 mm. The shell thickness is 3 mm and the overall length is 50 mm.
Parameter Value Unit
cylinder outer diameter 80 mm
cylinder inlet length 15 mm
rectangle internal length 80 mm
rectangle internal height 80 mm
rectangle inlet length 15 mm
offset Z 0 mm
offset Y 0 mm
total length 50 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀155 mm to 151×71 mm, thickness 2 mm (📦 #2375)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀155 mm to 151×71 mm, thickness 2 mm
Download this 3D file in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀155 mm and a rectangular section with inner dimensions 151×71 mm. The wall thickness is 2 mm and the total length is 100 mm.
Parameter Value Unit
cylinder outer diameter 155 mm
cylinder inlet length 25 mm
rectangle internal length 151 mm
rectangle internal height 71 mm
rectangle inlet length 25 mm
offset Z 0 mm
offset Y 0 mm
total length 100 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀65 mm to 60×30 mm, thickness 2 mm (📦 #1509)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀65 mm to 60×30 mm, thickness 2 mm
File in STL format of a round-to-rectangular adapter with an outer diameter of ⌀65 mm and a rectangular section with inner dimensions 60×30 mm. The wall thickness is 2 mm and the overall length is 80 mm. A chamfer is present on the inside of the rectangular end to ease insertion.
Parameter Value Unit
cylinder outer diameter 65 mm
cylinder inlet length 10 mm
rectangle internal length 60 mm
rectangle internal height 30 mm
rectangle inlet length 5 mm
offset Z 0 mm
offset Y 0 mm
total length 80 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀65 mm to 50×63 mm, thickness 2 mm (📦 #2228)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀65 mm to 50×63 mm, thickness 2 mm
3D file in STL format of a round-to-rectangular adapter with an external diameter of ⌀65 mm and a rectangular section with inner dimensions 50×63 mm. The shell thickness is 2 mm and the overall length is 80 mm. A chamfer is applied on the outside of the cylindrical end.
Parameter Value Unit
cylinder outer diameter 65 mm
cylinder inlet length 30 mm
rectangle internal length 50 mm
rectangle internal height 63 mm
rectangle inlet length 30 mm
offset Z 0 mm
offset Y 0 mm
total length 80 mm
thickness 2 mm
chamfer chamfer on t...

Round-to-Rectangular Tube Adapter STL file ⌀60 mm to 60×30 mm, thickness 2 mm (📦 #1508)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀60 mm to 60×30 mm, thickness 2 mm
Download this file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀60 mm and a rectangular section with internal dimensions 60×30 mm. The wall thickness is 2 mm and the total length is 80 mm. A chamfer is present on the inside of the rectangular end.
Parameter Value Unit
cylinder outer diameter 60 mm
cylinder inlet length 10 mm
rectangle internal length 60 mm
rectangle internal height 30 mm
rectangle inlet length 5 mm
offset Z 0 mm
offset Y 0 mm
total length 80 mm
thickness 2 mm
chamfer chamfer on t...

Round-to-Rectangular Tube Adapter STL 3D file ⌀100 mm to 50×50 mm, thickness 2 mm (📦 #2141)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀100 mm to 50×50 mm, thickness 2 mm
Download this 3D file in STL format of a round-to-rectangular adapter with an external diameter of ⌀100 mm and a rectangular section with internal dimensions 50×50 mm. The shell thickness is 2 mm and the total length is 200 mm.
Parameter Value Unit
cylinder outer diameter 100 mm
cylinder inlet length 25 mm
rectangle internal length 50 mm
rectangle internal height 50 mm
rectangle inlet length 15 mm
offset Z 0 mm
offset Y 0 mm
total length 200 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀52 mm to 77×33 mm, thickness 2 mm (📦 #2200)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀52 mm to 77×33 mm, thickness 2 mm
Download this 3D file in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀52 mm and a rectangular section with inner dimensions 77×33 mm. The wall thickness is 2 mm and the total length is 100 mm. A chamfer is applied on the inside of the rectangular end to ease insertion.
Parameter Value Unit
cylinder outer diameter 52 mm
cylinder inlet length 20 mm
rectangle internal length 77 mm
rectangle internal height 33 mm
rectangle inlet length 20 mm
offset Z 0 mm
offset Y 0 mm
total length 100 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL file ⌀90 mm to 60×60 mm, thickness 3 mm (📦 #1563)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀90 mm to 60×60 mm, thickness 3 mm
3D file in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀90 mm and a rectangular section with inner dimensions 60×60 mm. The wall thickness is 3 mm and the overall length is 60 mm.
Parameter Value Unit
cylinder outer diameter 90 mm
cylinder inlet length 20 mm
rectangle internal length 60 mm
rectangle internal height 60 mm
rectangle inlet length 20 mm
offset Z 0 mm
offset Y 0 mm
total length 60 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀126.0 mm to 120×70 mm, thickness 3 mm (📦 #2232)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀126.0 mm to 120×70 mm, thickness 3 mm
File in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀126.0 mm and a rectangular section with inner dimensions 120×70 mm. The wall thickness is 3 mm and the overall length is 50 mm.
Parameter Value Unit
cylinder outer diameter 126.0 mm
cylinder inlet length 15 mm
rectangle internal length 120 mm
rectangle internal height 70 mm
rectangle inlet length 15 mm
offset Z 0 mm
offset Y 0 mm
total length 50 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀126 mm to 145×69.5 mm, thickness 3 mm + offset (📦 #2102)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀126 mm to 145×69.5 mm, thickness 3 mm + offset
Download this 3D model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀126 mm and a rectangular section with inner dimensions 145×69.5 mm. The wall thickness is 3 mm and the total length is 64.5 mm. The adapter has an offset of 8.0 mm along the Z axis.
Parameter Value Unit
cylinder outer diameter 126 mm
cylinder inlet length 20 mm
rectangle internal length 145 mm
rectangle internal height 69.5 mm
rectangle inlet length 11 mm
offset Z 8.0 mm
offset Y 0 mm
total length 64.5 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀80 mm to 80×80 mm, thickness 3 mm (📦 #1528)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀80 mm to 80×80 mm, thickness 3 mm
File in STL format of a round-to-rectangular adapter with an external diameter of ⌀80 mm and a rectangular section with internal dimensions 80×80 mm. The wall thickness is 3 mm and the total length is 50 mm. A chamfer is present on the outside of the cylindrical end to ease insertion.
Parameter Value Unit
cylinder outer diameter 80 mm
cylinder inlet length 15 mm
rectangle internal length 80 mm
rectangle internal height 80 mm
rectangle inlet length 15 mm
offset Z 0 mm
offset Y 0 mm
total length 50 mm
thickness 3 mm
chamfer chamfer on t...

Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 80×80 mm, thickness 3 mm (📦 #2123)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 80×80 mm, thickness 3 mm
Model in STL format of a round-to-rectangular adapter with an external diameter of ⌀100 mm and a rectangular section with internal dimensions 80×80 mm. The shell thickness is 3 mm and the overall length is 65 mm.
Parameter Value Unit
cylinder outer diameter 100 mm
cylinder inlet length 15 mm
rectangle internal length 80 mm
rectangle internal height 80 mm
rectangle inlet length 30 mm
offset Z 0 mm
offset Y 0 mm
total length 65 mm
thickness 3 mm
chamfer no chamfer