Custom 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)
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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 81 mm (≃3 3/16 in)
#2 cylinder inlet length 10 mm (≃0.39 in)
#3 rectangle internal length 120 mm (≃4.72 in)
#4 rectangle internal height 70 mm (≃2 3/4 in)
#5 rectangle inlet length 5 mm (≃3/16 in)
#6 offset Z 0 mm (0 in)
#7 offset Y 0 mm (0 in)
#8 total length 110 mm (≃4.33 in)
#9 thickness 2 mm (≃0.08 in)
#10 chamfer no chamfer
Metadata Value
Cylinder internal diameter 77 mm (≃3.03 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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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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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 119×68 mm, thickness 2 mm (📦 #2603)

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Parameter Value Unit
cylinder outer diameter 100 mm
cylinder inlet length 20 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀80 mm to 110×80 mm, thickness 2 mm (📦 #3892)

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Round-to-Rectangular Tube Adapter STL 3D file ⌀80 mm to 110×80 mm, thickness 2 mm
Download this 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 110×80 mm. The shell thickness is 2 mm and the overall length is 60 mm.
Parameter Value Unit
cylinder outer diameter 80 mm
cylinder inlet length 20 mm
rectangle internal length 110 mm
rectangle internal height 80 mm
rectangle inlet length 20 mm
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Round-to-Rectangular Tube Adapter STL file ⌀103 mm to 110×50 mm, thickness 2 mm (📦 #3480)

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Round-to-Rectangular Tube Adapter STL file ⌀103 mm to 110×50 mm, thickness 2 mm
Download this 3D model in STL format of a round-to-rectangular adapter with an external diameter of ⌀103 mm and a rectangular section with internal dimensions 110×50 mm. The shell thickness is 2 mm and the overall length is 50 mm.
Parameter Value Unit
cylinder outer diameter 103 mm
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Round-to-Rectangular Tube Adapter STL file ⌀80 mm to 80×80 mm, thickness 2 mm (📦 #6349)

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Download this 3D model 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 shell thickness is 2 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
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offset Y 0 mm
total length 50 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀78 mm to 100×100 mm, thickness 2 mm (📦 #7936)

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Download this model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀78 mm and a rectangular section with inner dimensions 100×100 mm. The wall thickness is 2 mm and the total length is 50 mm.
Parameter Value Unit
cylinder outer diameter 78 mm
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Round-to-Rectangular Tube Adapter STL file ⌀50 mm to 90×45 mm, thickness 2 mm (📦 #4485)

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Download this model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀50 mm and a rectangular section with inner dimensions 90×45 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 20 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀104 mm to 104×104 mm, thickness 2 mm (📦 #4157)

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Parameter Value Unit
cylinder outer diameter 104 mm
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Parameter Value Unit
cylinder outer diameter 78 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀75 mm to 84×80 mm, thickness 2 mm (📦 #7610)

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Round-to-Rectangular Tube Adapter STL 3D file ⌀75 mm to 84×80 mm, thickness 2 mm
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Parameter Value Unit
cylinder outer diameter 75 mm
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Parameter Value Unit
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Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 90×50 mm, thickness 2 mm (📦 #4487)

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Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 90×50 mm, thickness 2 mm
3D model in STL format of a round-to-rectangular adapter with an external diameter of ⌀50 mm and a rectangular section with inner dimensions 90×50 mm. The shell thickness is 2 mm and the total length is 50 mm.
Parameter Value Unit
cylinder outer diameter 50 mm
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Round-to-Rectangular Tube Adapter STL file ⌀127 mm to 123×72 mm, thickness 2 mm (📦 #2593)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀127 mm to 123×72 mm, thickness 2 mm
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Parameter Value Unit
cylinder outer diameter 127 mm
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Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 50×50 mm, thickness 2 mm (📦 #1497)

1 object(s) - format STL (5.0/5) 4 vote(s)
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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Round-to-Rectangular Tube Adapter STL 3D file ⌀124 mm to 145×69.5 mm, thickness 2 mm + offset (📦 #1967)

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Round-to-Rectangular Tube Adapter STL 3D file ⌀124 mm to 145×69.5 mm, thickness 2 mm + offset
Download this 3D model in STL format of a round-to-rectangular adapter with an external diameter of ⌀124 mm and a rectangular section with internal dimensions 145×69.5 mm. The shell 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.
Parameter Value Unit
cylinder outer diameter 124 mm
cylinder inlet length 10 mm
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offset Y 2 mm
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Round-to-Rectangular Tube Adapter STL file ⌀75 mm to 80×60 mm, thickness 2 mm (📦 #7607)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀75 mm to 80×60 mm, thickness 2 mm
Download this file in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀75 mm and a rectangular section with inner dimensions 80×60 mm. The wall thickness is 2 mm and the overall length is 150 mm. A chamfer is present on the outside of the cylindrical end to ease insertion.
Parameter Value Unit
cylinder outer diameter 75 mm
cylinder inlet length 25 mm
rectangle internal length 80 mm
rectangle internal height 60 mm
rectangle inlet length 9 mm
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total length 150 mm
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Round-to-Rectangular Tube Adapter STL file ⌀38 mm to 100×50 mm, thickness 2 mm (📦 #4359)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀38 mm to 100×50 mm, thickness 2 mm
Download this model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀38 mm and a rectangular section with inner dimensions 100×50 mm. The wall thickness is 2 mm and the overall length is 50 mm.
Parameter Value Unit
cylinder outer diameter 38 mm
cylinder inlet length 5 mm
rectangle internal length 100 mm
rectangle internal height 50 mm
rectangle inlet length 5 mm
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offset Y 0 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 100×45 mm, thickness 2 mm (📦 #3430)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 100×45 mm, thickness 2 mm
Model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀50 mm and a rectangular section with internal dimensions 100×45 mm. The shell thickness is 2 mm and the total length is 80 mm. A chamfer is applied on the outside of the cylindrical end to ease insertion.
Parameter Value Unit
cylinder outer diameter 50 mm
cylinder inlet length 20 mm
rectangle internal length 100 mm
rectangle internal height 45 mm
rectangle inlet length 20 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 ⌀95 mm to 126×121 mm, thickness 2 mm (📦 #9175)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀95 mm to 126×121 mm, thickness 2 mm
Model in STL format of a round-to-rectangular adapter with an external diameter of ⌀95 mm and a rectangular section with inner dimensions 126×121 mm. The wall thickness is 2 mm and the total length is 95 mm. A chamfer is present on the outside of the cylindrical end to ease insertion.
Parameter Value Unit
cylinder outer diameter 95 mm
cylinder inlet length 20 mm
rectangle internal length 126 mm
rectangle internal height 121 mm
rectangle inlet length 20 mm
offset Z 0 mm
offset Y 0 mm
total length 95 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL file ⌀75 mm to 50×84 mm, thickness 2 mm (📦 #7644)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀75 mm to 50×84 mm, thickness 2 mm
Download this 3D model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀75 mm and a rectangular section with inner dimensions 50×84 mm. The wall thickness is 2 mm and the overall length is 60 mm.
Parameter Value Unit
cylinder outer diameter 75 mm
cylinder inlet length 25 mm
rectangle internal length 50 mm
rectangle internal height 84 mm
rectangle inlet length 10 mm
offset Z 0 mm
offset Y 0 mm
total length 60 mm
thickness 2 mm
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Parameter Value Unit
cylinder outer diameter 50 mm
cylinder inlet length 10 mm
rectangle internal length 72 mm
rectangle internal height 32 mm
rectangle inlet length 10 mm
offset Z 0 mm
offset Y 0 mm
total length 50 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 50×50 mm, thickness 2 mm (📦 #1891)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 50×50 mm, thickness 2 mm
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
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 100 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 95×45 mm, thickness 2 mm (📦 #4488)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 95×45 mm, thickness 2 mm
Download this model in STL format of a round-to-rectangular adapter with an external diameter of ⌀50 mm and a rectangular section with inner dimensions 95×45 mm. The shell thickness is 2 mm and the overall length is 50 mm. A chamfer is present on the outside of the cylindrical end to ease insertion.
Parameter Value Unit
cylinder outer diameter 50 mm
cylinder inlet length 7 mm
rectangle internal length 95 mm
rectangle internal height 45 mm
rectangle inlet length 7 mm
offset Z 0 mm
offset Y 0 mm
total length 50 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀100 mm to 135×100 mm, thickness 2 mm (📦 #3917)

1 object(s) - format STL
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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 135×100 mm. The shell thickness is 2 mm and the overall length is 60 mm. A chamfer is applied on the outside of the cylindrical end to ease insertion.
Parameter Value Unit
cylinder outer diameter 100 mm
cylinder inlet length 20 mm
rectangle internal length 135 mm
rectangle internal height 100 mm
rectangle inlet length 20 mm
offset Z 0 mm
offset Y 0 mm
total length 60 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL file ⌀92 mm to 200×100 mm, thickness 2 mm (📦 #8714)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀92 mm to 200×100 mm, thickness 2 mm
3D model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀92 mm and a rectangular section with internal dimensions 200×100 mm. The wall thickness is 2 mm and the overall length is 76.7 mm.
Parameter Value Unit
cylinder outer diameter 92 mm
cylinder inlet length 25 mm
rectangle internal length 200 mm
rectangle internal height 100 mm
rectangle inlet length 5 mm
offset Z 0 mm
offset Y 0 mm
total length 76.7 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL file ⌀95 mm to 126×121 mm, thickness 2 mm (📦 #9174)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀95 mm to 126×121 mm, thickness 2 mm
Download this model in STL format of a round-to-rectangular adapter with an external diameter of ⌀95 mm and a rectangular section with internal dimensions 126×121 mm. The wall thickness is 2 mm and the total length is 80 mm. A chamfer is applied on the outside of the cylindrical end to ease insertion.
Parameter Value Unit
cylinder outer diameter 95 mm
cylinder inlet length 20 mm
rectangle internal length 126 mm
rectangle internal height 121 mm
rectangle inlet length 20 mm
offset Z 0 mm
offset Y 0 mm
total length 80 mm
thickness 2 mm
chamfer chamfer on t...