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Custom Round-to-Rectangular Tube Adapter STL file ⌀20 mm to 135×135 mm, thickness 2 mm 📦#1857

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Model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀20 mm and a rectangular section with internal dimensions 135×135 mm. The shell thickness is 2 mm and the overall length is 120 mm. Chamfers are present on the outside of the cylindrical end and on the inside of the rectangular end.
Generation date: 2025-09-18
3D Model Round-to-Rectangular Tube Adapter STL file ⌀20 mm to 135×135 mm, thickness 2 mm

3D model download

Free
  • round-to-rectangular-adapter-d_model1857-nb0_dd{id}.stl : 4.2 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)
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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 20 mm (≃0.79 in)
#2 cylinder inlet length 50 mm (≃1.97 in)
#3 rectangle internal length 135 mm (≃5 5/16 in)
#4 rectangle internal height 135 mm (≃5 5/16 in)
#5 rectangle inlet length 40 mm (≃1 9/16 in)
#6 offset Z 0 mm (0 in)
#7 offset Y 0 mm (0 in)
#8 total length 120 mm (≃4.72 in)
#9 thickness 2 mm (≃0.08 in)
#10 chamfer chamfers on the outside
of the cylindrical tube
and on the inside of
the rectangular tube
Metadata Value
Cylinder internal diameter 16 mm (≃5/8 in)
illustration of the parameters
Parameter overview

  • 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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To search for a model based on your own parameters, go to the template page Round to rectangular adapter 

Round-to-Rectangular Tube Adapter STL 3D file ⌀45 mm to 150×120 mm, thickness 2 mm + offset (📦 #1940)

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Round-to-Rectangular Tube Adapter STL 3D file ⌀45 mm to 150×120 mm, thickness 2 mm + offset
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Parameter Value Unit
cylinder outer diameter 45 mm
cylinder inlet length 25 mm
rectangle internal length 150 mm
rectangle internal height 120 mm
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Round-to-Rectangular Tube Adapter STL file ⌀42 mm to 120×80 mm, thickness 2 mm + offset (📦 #1863)

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Parameter Value Unit
cylinder outer diameter 42 mm
cylinder inlet length 50 mm
rectangle internal length 120 mm
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rectangle inlet length 50 mm
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Round-to-Rectangular Tube Adapter STL file ⌀21.9 mm to 80×80 mm, thickness 2 mm + offset (📦 #2896)

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Round-to-Rectangular Tube Adapter STL file ⌀21.9 mm to 80×80 mm, thickness 2 mm + offset
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Parameter Value Unit
cylinder outer diameter 21.9 mm
cylinder inlet length 30 mm
rectangle internal length 80 mm
rectangle internal height 80 mm
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offset Y 7.5 mm
total length 90 mm
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Round-to-Rectangular Tube Adapter STL file ⌀58 mm to 62×82 mm, thickness 2 mm (📦 #2596)

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Parameter Value Unit
cylinder outer diameter 58 mm
cylinder inlet length 30 mm
rectangle internal length 62 mm
rectangle internal height 82 mm
rectangle inlet length 50 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 ⌀78 mm to 120×120 mm, thickness 2 mm (📦 #1849)

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Parameter Value Unit
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cylinder inlet length 20 mm
rectangle internal length 120 mm
rectangle internal height 120 mm
rectangle inlet length 20 mm
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thickness 2 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀99.5 mm to 170×100 mm, thickness 2 mm (📦 #1696)

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Download this file in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀99.5 mm and a rectangular section with inner dimensions 170×100 mm. The wall thickness is 2 mm and the overall length is 120 mm. Chamfers are applied on the outside of the cylindrical end and on the inside of the rectangular end to ease insertion.
Parameter Value Unit
cylinder outer diameter 99.5 mm
cylinder inlet length 30 mm
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rectangle internal height 100 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀65 mm to 62×82 mm, thickness 2 mm (📦 #2595)

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Parameter Value Unit
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Round-to-Rectangular Tube Adapter STL 3D file ⌀60 mm to 100×50 mm, thickness 2 mm + offset
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Parameter Value Unit
cylinder outer diameter 60 mm
cylinder inlet length 50 mm
rectangle internal length 100 mm
rectangle internal height 50 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀75 mm to 99×101 mm, thickness 2 mm (📦 #1847)

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Parameter Value Unit
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cylinder inlet length 25 mm
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Parameter Value Unit
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Parameter Value Unit
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Round-to-Rectangular Tube Adapter STL file ⌀99.5 mm to 170×100 mm, thickness 2 mm (📦 #1691)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀99.5 mm to 170×100 mm, thickness 2 mm
Download this 3D file in STL format of a round-to-rectangular adapter with an external diameter of ⌀99.5 mm and a rectangular section with internal dimensions 170×100 mm. The shell thickness is 2 mm and the total length is 180 mm. Chamfers are applied on the outside of the cylindrical end and on the inside of the rectangular end.
Parameter Value Unit
cylinder outer diameter 99.5 mm
cylinder inlet length 30 mm
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rectangle internal height 100 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀58 mm to 150×48 mm, thickness 2 mm + offset (📦 #1865)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀58 mm to 150×48 mm, thickness 2 mm + offset
Download this model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀58 mm and a rectangular section with internal dimensions 150×48 mm. The wall thickness is 2 mm and the overall length is 100 mm. The adapter has an offset of 15 mm along the Z axis. Chamfers are present on the outside of the cylindrical end and on the inside of the rectangular end.
Parameter Value Unit
cylinder outer diameter 58 mm
cylinder inlet length 30 mm
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chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL 3D file ⌀60 mm to 100×48 mm, thickness 2 mm + offset (📦 #1862)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀60 mm to 100×48 mm, thickness 2 mm + offset
Download this 3D model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀60 mm and a rectangular section with internal dimensions 100×48 mm. The shell thickness is 2 mm and the overall length is 100 mm. The adapter has an offset of 15 mm along the Z axis. Chamfers are applied on the outside of the cylindrical end and on the inside of the rectangular end.
Parameter Value Unit
cylinder outer diameter 60 mm
cylinder inlet length 30 mm
rectangle internal length 100 mm
rectangle internal height 48 mm
rectangle inlet length 30 mm
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offset Y 0 mm
total length 100 mm
thickness 2 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL file ⌀78 mm to 43×82 mm, thickness 2 mm (📦 #2601)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀78 mm to 43×82 mm, thickness 2 mm
Model in STL format of a round-to-rectangular adapter with an external diameter of ⌀78 mm and a rectangular section with inner dimensions 43×82 mm. The wall thickness is 2 mm and the total length is 100 mm. A chamfer is present on the inside of the rectangular end.
Parameter Value Unit
cylinder outer diameter 78 mm
cylinder inlet length 30 mm
rectangle internal length 43 mm
rectangle internal height 82 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀80 mm to 60×60 mm, thickness 2 mm (📦 #1919)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀80 mm to 60×60 mm, thickness 2 mm
Download this 3D model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀80 mm and a rectangular section with inner dimensions 60×60 mm. The shell thickness is 2 mm and the overall length is 100 mm. Chamfers are present on the outside of the cylindrical end and on the inside of the rectangular end.
Parameter Value Unit
cylinder outer diameter 80 mm
cylinder inlet length 30 mm
rectangle internal length 60 mm
rectangle internal height 60 mm
rectangle inlet length 30 mm
offset Z 0 mm
offset Y 0 mm
total length 100 mm
thickness 2 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL 3D file ⌀60 mm to 100×45 mm, thickness 2 mm + offset (📦 #1869)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀60 mm to 100×45 mm, thickness 2 mm + offset
3D file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀60 mm and a rectangular section with inner dimensions 100×45 mm. The wall thickness is 2 mm and the total length is 90 mm. The adapter has an offset of 15 mm along the Z axis. Chamfers are applied on the outside of the cylindrical end and on the inside of the rectangular end.
Parameter Value Unit
cylinder outer diameter 60 mm
cylinder inlet length 30 mm
rectangle internal length 100 mm
rectangle internal height 45 mm
rectangle inlet length 30 mm
offset Z 15 mm
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thickness 2 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL file ⌀73 mm to 151×151 mm, thickness 2 mm + offset (📦 #2351)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀73 mm to 151×151 mm, thickness 2 mm + offset
3D file in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀73 mm and a rectangular section with internal dimensions 151×151 mm. The wall thickness is 2 mm and the overall length is 60 mm. The adapter has an offset of 2 mm along the Y axis and 2 mm along the Z axis. Chamfers are present on the outside of the cylindrical end and on the inside of the rectangular end to ease insertion.
Parameter Value Unit
cylinder outer diameter 73 mm
cylinder inlet length 15 mm
rectangle internal length 151 mm
rectangle internal height 151 mm
rectangle inlet length 15 mm
offset Z 2 mm
offset Y 2 mm
total length 60 mm
thickness 2 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL file ⌀73 mm to 151×151 mm, thickness 2 mm + offset (📦 #2350)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀73 mm to 151×151 mm, thickness 2 mm + offset
Download this file in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀73 mm and a rectangular section with internal dimensions 151×151 mm. The wall thickness is 2 mm and the total length is 50 mm. The adapter has an offset of 2 mm along the Y axis and 2 mm along the Z axis. Chamfers are present on the outside of the cylindrical end and on the inside of the rectangular end to ease insertion.
Parameter Value Unit
cylinder outer diameter 73 mm
cylinder inlet length 20 mm
rectangle internal length 151 mm
rectangle internal height 151 mm
rectangle inlet length 5 mm
offset Z 2 mm
offset Y 2 mm
total length 50 mm
thickness 2 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL 3D file ⌀60 mm to 170×45 mm, thickness 2 mm + offset (📦 #2967)

1 object(s) - format STL
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File in STL format of a round-to-rectangular adapter with an outer diameter of ⌀60 mm and a rectangular section with inner dimensions 170×45 mm. The wall thickness is 2 mm and the overall length is 100 mm. The adapter has an offset of 17.5 mm along the Z axis. Chamfers are present on the outside of the cylindrical end and on the inside of the rectangular end to ease insertion.
Parameter Value Unit
cylinder outer diameter 60 mm
cylinder inlet length 25 mm
rectangle internal length 170 mm
rectangle internal height 45 mm
rectangle inlet length 40 mm
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1 object(s) - format STL
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Download this model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀60 mm and a rectangular section with inner dimensions 65×65 mm. The shell thickness is 2 mm and the overall length is 64 mm. Chamfers are present on the outside of the cylindrical end and on the inside of the rectangular end.
Parameter Value Unit
cylinder outer diameter 60 mm
cylinder inlet length 30 mm
rectangle internal length 65 mm
rectangle internal height 65 mm
rectangle inlet length 5 mm
offset Z 0 mm
offset Y 0 mm
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thickness 2 mm
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Round-to-Rectangular Tube Adapter STL file ⌀62 mm to 110×54 mm, thickness 3 mm (📦 #2840)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀62 mm to 110×54 mm, thickness 3 mm
3D file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀62 mm and a rectangular section with internal dimensions 110×54 mm. The wall thickness is 3 mm and the overall length is 80 mm. Chamfers are applied on the outside of the cylindrical end and on the inside of the rectangular end to ease insertion.
Parameter Value Unit
cylinder outer diameter 62 mm
cylinder inlet length 30 mm
rectangle internal length 110 mm
rectangle internal height 54 mm
rectangle inlet length 30 mm
offset Z 0 mm
offset Y 0 mm
total length 80 mm
thickness 3 mm
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Round-to-Rectangular Tube Adapter STL file ⌀101.6 mm to 210.5×170.5 mm, thickness 3 mm + offset (📦 #2833)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀101.6 mm to 210.5×170.5 mm, thickness 3 mm + offset
File in STL format of a round-to-rectangular adapter with an outer diameter of ⌀101.6 mm and a rectangular section with inner dimensions 210.5×170.5 mm. The wall thickness is 3 mm and the overall length is 110 mm. The adapter has an offset of 14 mm along the Z axis. Chamfers are applied on the outside of the cylindrical end and on the inside of the rectangular end to ease insertion.
Parameter Value Unit
cylinder outer diameter 101.6 mm
cylinder inlet length 50 mm
rectangle internal length 210.5 mm
rectangle internal height 170.5 mm
rectangle inlet length 30 mm
offset Z 14 mm
offset Y 0 mm
total length 110 mm
thickness 3 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀73 mm to 151×151 mm, thickness 2 mm + offset (📦 #2354)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀73 mm to 151×151 mm, thickness 2 mm + offset
File in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀73 mm and a rectangular section with inner dimensions 151×151 mm. The wall thickness is 2 mm and the total length is 50 mm. The adapter has an offset of 2 mm along the Y axis and 2 mm along the Z axis. Chamfers are present on the outside of the cylindrical end and on the inside of the rectangular end.
Parameter Value Unit
cylinder outer diameter 73 mm
cylinder inlet length 15 mm
rectangle internal length 151 mm
rectangle internal height 151 mm
rectangle inlet length 5 mm
offset Z 2 mm
offset Y 2 mm
total length 50 mm
thickness 2 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL 3D file ⌀40 mm to 77×33 mm, thickness 3 mm (📦 #2199)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀40 mm to 77×33 mm, thickness 3 mm
Download this model in STL format of a round-to-rectangular adapter with an external diameter of ⌀40 mm and a rectangular section with internal dimensions 77×33 mm. The shell thickness is 3 mm and the total length is 100 mm. Chamfers are present on the outside of the cylindrical end and on the inside of the rectangular end.
Parameter Value Unit
cylinder outer diameter 40 mm
cylinder inlet length 40 mm
rectangle internal length 77 mm
rectangle internal height 33 mm
rectangle inlet length 40 mm
offset Z 0 mm
offset Y 0 mm
total length 100 mm
thickness 3 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL 3D file ⌀68 mm to 47×66 mm, thickness 2 mm (📦 #2956)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀68 mm to 47×66 mm, thickness 2 mm
File in STL format of a round-to-rectangular adapter with an outer diameter of ⌀68 mm and a rectangular section with internal dimensions 47×66 mm. The wall thickness is 2 mm and the overall length is 80 mm. Chamfers are applied on the outside of the cylindrical end and on the inside of the rectangular end.
Parameter Value Unit
cylinder outer diameter 68 mm
cylinder inlet length 30 mm
rectangle internal length 47 mm
rectangle internal height 66 mm
rectangle inlet length 5 mm
offset Z 0 mm
offset Y 0 mm
total length 80 mm
thickness 2 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL 3D file ⌀99.5 mm to 170×100 mm, thickness 3 mm (📦 #1692)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀99.5 mm to 170×100 mm, thickness 3 mm
Download this file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀99.5 mm and a rectangular section with inner dimensions 170×100 mm. The wall thickness is 3 mm and the total length is 180 mm. Chamfers are present on the outside of the cylindrical end and on the inside of the rectangular end.
Parameter Value Unit
cylinder outer diameter 99.5 mm
cylinder inlet length 30 mm
rectangle internal length 170 mm
rectangle internal height 100 mm
rectangle inlet length 30 mm
offset Z 0 mm
offset Y 0 mm
total length 180 mm
thickness 3 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL 3D file ⌀21.9 mm to 80.2×80.2 mm, thickness 3 mm (📦 #2908)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀21.9 mm to 80.2×80.2 mm, thickness 3 mm
Download this model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀21.9 mm and a rectangular section with inner dimensions 80.2×80.2 mm. The shell thickness is 3 mm and the total length is 60 mm. Chamfers are present on the outside of the cylindrical end and on the inside of the rectangular end.
Parameter Value Unit
cylinder outer diameter 21.9 mm
cylinder inlet length 20 mm
rectangle internal length 80.2 mm
rectangle internal height 80.2 mm
rectangle inlet length 15 mm
offset Z 0 mm
offset Y 0 mm
total length 60 mm
thickness 3 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL file ⌀110 mm to 100×100 mm, thickness 3 mm (📦 #1756)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀110 mm to 100×100 mm, thickness 3 mm
Download this model in STL format of a round-to-rectangular adapter with an external diameter of ⌀110 mm and a rectangular section with internal dimensions 100×100 mm. The shell thickness is 3 mm and the total length is 80 mm. Chamfers are applied on the outside of the cylindrical end and on the inside of the rectangular end to ease insertion.
Parameter Value Unit
cylinder outer diameter 110 mm
cylinder inlet length 30 mm
rectangle internal length 100 mm
rectangle internal height 100 mm
rectangle inlet length 30 mm
offset Z 0 mm
offset Y 0 mm
total length 80 mm
thickness 3 mm
chamfer chamfers on ...