Custom Round-to-Rectangular Tube Adapter STL file ⌀21 mm to 23×23 mm, thickness 3 mm 📦#6983

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Download this model in STL format of a round-to-rectangular adapter with an external diameter of ⌀21 mm and a rectangular section with internal dimensions 23×23 mm. The wall thickness is 3 mm and the total length is 136 mm.
Generation date: 2026-01-31
3D Model Round-to-Rectangular Tube Adapter STL file ⌀21 mm to 23×23 mm, thickness 3 mm

3D model download

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  • round-to-rectangular-adapter-d_model6983-nb0_dd{id}.stl : 702.7 Ko
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 21 mm (≃13/16 in)
#2 cylinder inlet length 5 mm (≃3/16 in)
#3 rectangle internal length 23 mm (≃0.91 in)
#4 rectangle internal height 23 mm (≃0.91 in)
#5 rectangle inlet length 98 mm (≃3.86 in)
#6 offset Z 0 mm (0 in)
#7 offset Y 0 mm (0 in)
#8 total length 136 mm (≃5.35 in)
#9 thickness 3 mm (≃1/8 in)
#10 chamfer no chamfer
Metadata Value
Cylinder internal diameter 15 mm (≃0.59 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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Parameter Value Unit
cylinder outer diameter 22 mm
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rectangle internal length 24 mm
rectangle internal height 22 mm
rectangle inlet length 98 mm
offset Z 0 mm
offset Y 0 mm
total length 136 mm
thickness 4 mm
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Parameter Value Unit
cylinder outer diameter 20 mm
cylinder inlet length 5 mm
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Round-to-Rectangular Tube Adapter STL file ⌀26 mm to 24×23 mm, thickness 4 mm (📦 #7001)

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Parameter Value Unit
cylinder outer diameter 26 mm
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Parameter Value Unit
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Parameter Value Unit
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Parameter Value Unit
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Parameter Value Unit
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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 ⌀20 mm to 50×30 mm, thickness 3 mm (📦 #1717)

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Parameter Value Unit
cylinder outer diameter 20 mm
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Parameter Value Unit
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Round-to-Rectangular Tube Adapter STL 3D file ⌀84 mm to 85×85 mm, thickness 2 mm (📦 #3219)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀84 mm to 85×85 mm, thickness 2 mm
Model in STL format of a round-to-rectangular adapter with an external diameter of ⌀84 mm and a rectangular section with internal dimensions 85×85 mm. The shell thickness is 2 mm and the overall length is 150 mm.
Parameter Value Unit
cylinder outer diameter 84 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀20 mm to 25×5 mm, thickness 3 mm (📦 #9026)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀20 mm to 25×5 mm, thickness 3 mm
Download this 3D file in STL format of a round-to-rectangular adapter with an external diameter of ⌀20 mm and a rectangular section with inner dimensions 25×5 mm. The wall thickness is 3 mm and the overall length is 85 mm. A chamfer is present on the outside of the cylindrical end to ease insertion.
Parameter Value Unit
cylinder outer diameter 20 mm
cylinder inlet length 25 mm
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rectangle internal height 5 mm
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total length 85 mm
thickness 3 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀20 mm to 24×16.4 mm, thickness 2 mm (📦 #3003)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀20 mm to 24×16.4 mm, thickness 2 mm
Download this model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀20 mm and a rectangular section with internal dimensions 24×16.4 mm. The shell thickness is 2 mm and the total length is 70 mm.
Parameter Value Unit
cylinder outer diameter 20 mm
cylinder inlet length 10 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 3D file ⌀88 mm to 80×60 mm, thickness 4 mm + offset (📦 #8561)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀88 mm to 80×60 mm, thickness 4 mm + offset
Download this 3D file in STL format of a round-to-rectangular adapter with an external diameter of ⌀88 mm and a rectangular section with internal dimensions 80×60 mm. The wall thickness is 4 mm and the total length is 130 mm. The adapter has an offset of 10 mm along the Z axis. A chamfer is present on the outside of the cylindrical end to ease insertion.
Parameter Value Unit
cylinder outer diameter 88 mm
cylinder inlet length 30 mm
rectangle internal length 80 mm
rectangle internal height 60 mm
rectangle inlet length 80 mm
offset Z 10 mm
offset Y 0 mm
total length 130 mm
thickness 4 mm
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Round-to-Rectangular Tube Adapter STL file ⌀126 mm to 30×63.5 mm, thickness 3 mm (📦 #5405)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀126 mm to 30×63.5 mm, thickness 3 mm
3D file in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀126 mm and a rectangular section with inner dimensions 30×63.5 mm. The wall thickness is 3 mm and the total length is 150 mm.
Parameter Value Unit
cylinder outer diameter 126 mm
cylinder inlet length 30 mm
rectangle internal length 30 mm
rectangle internal height 63.5 mm
rectangle inlet length 80 mm
offset Z 0 mm
offset Y 0 mm
total length 150 mm
thickness 3 mm
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Round-to-Rectangular Tube Adapter STL file ⌀48 mm to 54×25 mm, thickness 2 mm + offset (📦 #8073)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀48 mm to 54×25 mm, thickness 2 mm + offset
Download this 3D model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀48 mm and a rectangular section with internal dimensions 54×25 mm. The wall thickness is 2 mm and the overall length is 100 mm. The adapter has an offset of 10 mm along the Z axis. A chamfer is applied on the outside of the cylindrical end.
Parameter Value Unit
cylinder outer diameter 48 mm
cylinder inlet length 30 mm
rectangle internal length 54 mm
rectangle internal height 25 mm
rectangle inlet length 50 mm
offset Z 10 mm
offset Y 0 mm
total length 100 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL file ⌀49.5 mm to 54×25 mm, thickness 2 mm + offset (📦 #8076)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀49.5 mm to 54×25 mm, thickness 2 mm + offset
3D file in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀49.5 mm and a rectangular section with internal dimensions 54×25 mm. The wall thickness is 2 mm and the total length is 100 mm. The adapter has an offset of 10 mm along the Z axis. A chamfer is applied on the outside of the cylindrical end to ease insertion.
Parameter Value Unit
cylinder outer diameter 49.5 mm
cylinder inlet length 30 mm
rectangle internal length 54 mm
rectangle internal height 25 mm
rectangle inlet length 50 mm
offset Z 10 mm
offset Y 0 mm
total length 100 mm
thickness 2 mm
chamfer chamfer on t...

Round-to-Rectangular Tube Adapter STL file ⌀48.5 mm to 80×80 mm, thickness 3 mm (📦 #6761)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀48.5 mm to 80×80 mm, thickness 3 mm
Download this 3D model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀48.5 mm and a rectangular section with inner dimensions 80×80 mm. The wall thickness is 3 mm and the overall length is 90 mm.
Parameter Value Unit
cylinder outer diameter 48.5 mm
cylinder inlet length 25 mm
rectangle internal length 80 mm
rectangle internal height 80 mm
rectangle inlet length 40 mm
offset Z 0 mm
offset Y 0 mm
total length 90 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀49.1 mm to 53×43 mm, thickness 2 mm + offset (📦 #8078)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀49.1 mm to 53×43 mm, thickness 2 mm + offset
3D file in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀49.1 mm and a rectangular section with internal dimensions 53×43 mm. The shell thickness is 2 mm and the total length is 100 mm. The adapter has an offset of 10 mm along the Z axis. A chamfer is applied on the outside of the cylindrical end to ease insertion.
Parameter Value Unit
cylinder outer diameter 49.1 mm
cylinder inlet length 30 mm
rectangle internal length 53 mm
rectangle internal height 43 mm
rectangle inlet length 50 mm
offset Z 10 mm
offset Y 0 mm
total length 100 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL file ⌀20 mm to 26×26 mm, thickness 2 mm (📦 #3004)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀20 mm to 26×26 mm, thickness 2 mm
Model in STL format of a round-to-rectangular adapter with an external diameter of ⌀20 mm and a rectangular section with inner dimensions 26×26 mm. The shell thickness is 2 mm and the total length is 90 mm.
Parameter Value Unit
cylinder outer diameter 20 mm
cylinder inlet length 30 mm
rectangle internal length 26 mm
rectangle internal height 26 mm
rectangle inlet length 40 mm
offset Z 0 mm
offset Y 0 mm
total length 90 mm
thickness 2 mm
chamfer no chamfer