Custom Round-to-Rectangular Tube Adapter STL 3D file ⌀79 mm to 121×56 mm, thickness 4 mm + offset 📦#7535

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File in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀79 mm and a rectangular section with internal dimensions 121×56 mm. The shell thickness is 4 mm and the overall length is 150 mm. The adapter has an offset of 17.5 mm along the Z axis. Chamfers are applied on the outside of the cylindrical end and on the inside of the rectangular end.
Generation date: 2026-02-28
3D Model Round-to-Rectangular Tube Adapter STL 3D file ⌀79 mm to 121×56 mm, thickness 4 mm + offset

3D model download

Free
  • round-to-rectangular-adapter-d_model7535-nb0_dd{id}.stl : 1.4 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 79 mm (≃3 1/8 in)
#2 cylinder inlet length 35 mm (≃1 3/8 in)
#3 rectangle internal length 121 mm (≃4 3/4 in)
#4 rectangle internal height 56 mm (≃2.20 in)
#5 rectangle inlet length 35 mm (≃1 3/8 in)
#6 offset Z 17.5 mm (≃11/16 in)
#7 offset Y 0 mm (0 in)
#8 total length 150 mm (≃5.91 in)
#9 thickness 4 mm (≃0.16 in)
#10 chamfer chamfers on the outside
of the cylindrical tube
and on the inside of
the rectangular tube
Metadata Value
Cylinder internal diameter 71 mm (≃2.80 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
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cylinder inlet length 35 mm
rectangle internal length 215 mm
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Parameter Value Unit
cylinder outer diameter 68 mm
cylinder inlet length 50 mm
rectangle internal length 140 mm
rectangle internal height 20 mm
rectangle inlet length 40 mm
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Round-to-Rectangular Tube Adapter STL file ⌀99 mm to 120.5×60.5 mm, thickness 3 mm + offset (📦 #4350)

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Round-to-Rectangular Tube Adapter STL file ⌀99 mm to 120.5×60.5 mm, thickness 3 mm + offset
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Parameter Value Unit
cylinder outer diameter 99 mm
cylinder inlet length 30 mm
rectangle internal length 120.5 mm
rectangle internal height 60.5 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀78 mm to 100×55 mm, thickness 4 mm + offset (📦 #6894)

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Round-to-Rectangular Tube Adapter STL 3D file ⌀78 mm to 100×55 mm, thickness 4 mm + offset
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Parameter Value Unit
cylinder outer diameter 78 mm
cylinder inlet length 15 mm
rectangle internal length 100 mm
rectangle internal height 55 mm
rectangle inlet length 64 mm
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offset Y 0 mm
total length 120 mm
thickness 4 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀78 mm to 100×55 mm, thickness 4 mm + offset (📦 #6893)

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Parameter Value Unit
cylinder outer diameter 78 mm
cylinder inlet length 15 mm
rectangle internal length 100 mm
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Round-to-Rectangular Tube Adapter STL file ⌀78 mm to 100×51 mm, thickness 4 mm + offset (📦 #6892)

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Round-to-Rectangular Tube Adapter STL file ⌀78 mm to 100×51 mm, thickness 4 mm + offset
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Parameter Value Unit
cylinder outer diameter 78 mm
cylinder inlet length 15 mm
rectangle internal length 100 mm
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Round-to-Rectangular Tube Adapter STL file ⌀78 mm to 100×55 mm, thickness 4 mm + offset (📦 #6895)

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Parameter Value Unit
cylinder outer diameter 78 mm
cylinder inlet length 15 mm
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Parameter Value Unit
cylinder outer diameter 75 mm
cylinder inlet length 25 mm
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rectangle inlet length 30 mm
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offset Y 3 mm
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thickness 3 mm
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Parameter Value Unit
cylinder outer diameter 75 mm
cylinder inlet length 50 mm
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Parameter Value Unit
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Parameter Value Unit
cylinder outer diameter 78 mm
cylinder inlet length 15 mm
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Round-to-Rectangular Tube Adapter STL file ⌀78 mm to 100×47 mm, thickness 4 mm + offset (📦 #6873)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀78 mm to 100×47 mm, thickness 4 mm + offset
3D model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀78 mm and a rectangular section with inner dimensions 100×47 mm. The shell thickness is 4 mm and the total length is 99 mm. The adapter has an offset of 10 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 78 mm
cylinder inlet length 15 mm
rectangle internal length 100 mm
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rectangle inlet length 64 mm
offset Z 10 mm
offset Y 0 mm
total length 99 mm
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Round-to-Rectangular Tube Adapter STL file ⌀75 mm to 150×30 mm, thickness 3 mm (📦 #9839)

1 object(s) - format STL
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Parameter Value Unit
cylinder outer diameter 75 mm
cylinder inlet length 25 mm
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rectangle internal height 30 mm
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Round-to-Rectangular Tube Adapter STL file ⌀78 mm to 104.5×50.8 mm, thickness 4 mm + offset (📦 #6897)

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Download this file in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀78 mm and a rectangular section with internal dimensions 104.5×50.8 mm. The wall thickness is 4 mm and the total length is 120 mm. The adapter has an offset of 13 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 78 mm
cylinder inlet length 15 mm
rectangle internal length 104.5 mm
rectangle internal height 50.8 mm
rectangle inlet length 71 mm
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total length 120 mm
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chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL file ⌀78 mm to 100×51 mm, thickness 4 mm + offset (📦 #6896)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀78 mm to 100×51 mm, thickness 4 mm + offset
Download this 3D model in STL format of a round-to-rectangular adapter with an external diameter of ⌀78 mm and a rectangular section with inner dimensions 100×51 mm. The shell thickness is 4 mm and the total length is 120 mm. The adapter has an offset of 13 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 78 mm
cylinder inlet length 15 mm
rectangle internal length 100 mm
rectangle internal height 51 mm
rectangle inlet length 71 mm
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thickness 4 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 112.5×50.8 mm, thickness 3 mm (📦 #2073)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 112.5×50.8 mm, thickness 3 mm
Download this 3D model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀100 mm and a rectangular section with inner dimensions 112.5×50.8 mm. The wall thickness is 3 mm and the overall length is 88 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 100 mm
cylinder inlet length 38 mm
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Round-to-Rectangular Tube Adapter STL file ⌀101 mm to 120×60 mm, thickness 3 mm + offset (📦 #4329)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀101 mm to 120×60 mm, thickness 3 mm + offset
Model in STL format of a round-to-rectangular adapter with an external diameter of ⌀101 mm and a rectangular section with inner dimensions 120×60 mm. The wall thickness is 3 mm and the total length is 100 mm. The adapter has an offset of 30 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 101 mm
cylinder inlet length 20 mm
rectangle internal length 120 mm
rectangle internal height 60 mm
rectangle inlet length 20 mm
offset Z 30 mm
offset Y 0 mm
total length 100 mm
thickness 3 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL file ⌀80 mm to 60×60 mm, thickness 3 mm (📦 #1485)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀80 mm to 60×60 mm, thickness 3 mm
Download this 3D file in STL format of a round-to-rectangular adapter with an external diameter of ⌀80 mm and a rectangular section with inner dimensions 60×60 mm. The shell thickness is 3 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 3 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL 3D file ⌀108 mm to 152×82 mm, thickness 3 mm (📦 #4106)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀108 mm to 152×82 mm, thickness 3 mm
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Parameter Value Unit
cylinder outer diameter 108 mm
cylinder inlet length 40 mm
rectangle internal length 152 mm
rectangle internal height 82 mm
rectangle inlet length 50 mm
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Parameter Value Unit
cylinder outer diameter 62 mm
cylinder inlet length 30 mm
rectangle internal length 110 mm
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offset Y 0 mm
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thickness 3 mm
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Round-to-Rectangular Tube Adapter STL file ⌀108 mm to 154×84 mm, thickness 3 mm (📦 #4105)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀108 mm to 154×84 mm, thickness 3 mm
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Parameter Value Unit
cylinder outer diameter 108 mm
cylinder inlet length 40 mm
rectangle internal length 154 mm
rectangle internal height 84 mm
rectangle inlet length 50 mm
offset Z 0 mm
offset Y 0 mm
total length 120 mm
thickness 3 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL file ⌀20 mm to 120.5×60.5 mm, thickness 3 mm + offset (📦 #4365)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀20 mm to 120.5×60.5 mm, thickness 3 mm + offset
Download this 3D file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀20 mm and a rectangular section with inner dimensions 120.5×60.5 mm. The wall thickness is 3 mm and the total length is 120 mm. The adapter has an offset of 30 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 20 mm
cylinder inlet length 30 mm
rectangle internal length 120.5 mm
rectangle internal height 60.5 mm
rectangle inlet length 30 mm
offset Z 30 mm
offset Y 0 mm
total length 120 mm
thickness 3 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 80×80 mm, thickness 3 mm (📦 #4604)

1 object(s) - format STL
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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 80×80 mm. The shell thickness is 3 mm and the total length is 160 mm. 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 50 mm
cylinder inlet length 50 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 160 mm
thickness 3 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 ⌀150 mm to 150×50 mm, thickness 4 mm + offset (📦 #1926)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀150 mm to 150×50 mm, thickness 4 mm + offset
File in STL format of a round-to-rectangular adapter with an outer diameter of ⌀150 mm and a rectangular section with inner dimensions 150×50 mm. The wall thickness is 4 mm and the overall length is 100 mm. The adapter has an offset of 3 mm along the Y axis and 3 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 150 mm
cylinder inlet length 30 mm
rectangle internal length 150 mm
rectangle internal height 50 mm
rectangle inlet length 30 mm
offset Z 3 mm
offset Y 3 mm
total length 100 mm
thickness 4 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL 3D file ⌀107 mm to 110×54 mm, thickness 3 mm (📦 #2839)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀107 mm to 110×54 mm, thickness 3 mm
Download this model in STL format of a round-to-rectangular adapter with an external diameter of ⌀107 mm and a rectangular section with internal dimensions 110×54 mm. The wall thickness is 3 mm and the total length is 80 mm. 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 107 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
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 80×80 mm, thickness 3 mm (📦 #4602)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 80×80 mm, thickness 3 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 80×80 mm. The shell thickness is 3 mm and the total 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 50 mm
cylinder inlet length 50 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 120 mm
thickness 3 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL 3D file ⌀150 mm to 150×50 mm, thickness 4 mm (📦 #2515)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀150 mm to 150×50 mm, thickness 4 mm
Download this 3D model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀150 mm and a rectangular section with internal dimensions 150×50 mm. The shell thickness is 4 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 150 mm
cylinder inlet length 30 mm
rectangle internal length 150 mm
rectangle internal height 50 mm
rectangle inlet length 30 mm
offset Z 0 mm
offset Y 0 mm
total length 100 mm
thickness 4 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL 3D file ⌀100 mm to 107×52 mm, thickness 3 mm (📦 #5451)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀100 mm to 107×52 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 107×52 mm. The shell thickness is 3 mm and the total length is 100 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 100 mm
cylinder inlet length 20 mm
rectangle internal length 107 mm
rectangle internal height 52 mm
rectangle inlet length 20 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 file ⌀75 mm to 120×25 mm, thickness 3 mm (📦 #1984)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀75 mm to 120×25 mm, thickness 3 mm
3D file in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀75 mm and a rectangular section with internal dimensions 120×25 mm. The shell thickness is 3 mm and the total length is 150 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 75 mm
cylinder inlet length 50 mm
rectangle internal length 120 mm
rectangle internal height 25 mm
rectangle inlet length 60 mm
offset Z 0 mm
offset Y 0 mm
total length 150 mm
thickness 3 mm
chamfer chamfers on ...