Custom Round-to-Rectangular Tube Adapter STL file ⌀81 mm to 102×46 mm, thickness 3 mm + offset 📦#3573

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3D model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀81 mm and a rectangular section with internal dimensions 102×46 mm. The shell thickness is 3 mm and the total length is 100 mm. The adapter has an offset of 25 mm along the Y axis and 25 mm along the Z axis.
Generation date: 2025-11-23
3D Model Round-to-Rectangular Tube Adapter STL file ⌀81 mm to 102×46 mm, thickness 3 mm + offset

3D model download

Free
  • round-to-rectangular-adapter-d_model3573-nb0_dd{id}.stl : 2.1 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 20 mm (≃0.79 in)
#3 rectangle internal length 102 mm (≃4.02 in)
#4 rectangle internal height 46 mm (≃1 13/16 in)
#5 rectangle inlet length 30 mm (≃1 3/16 in)
#6 offset Z 25 mm (≃0.98 in)
#7 offset Y 25 mm (≃0.98 in)
#8 total length 100 mm (≃3 15/16 in)
#9 thickness 3 mm (≃1/8 in)
#10 chamfer no chamfer
Metadata Value
Cylinder internal diameter 75 mm (≃2 15/16 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 file ⌀81 mm to 108×52 mm, thickness 3 mm + offset (📦 #3572)

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Round-to-Rectangular Tube Adapter STL file ⌀81 mm to 108×52 mm, thickness 3 mm + offset
Download this 3D model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀81 mm and a rectangular section with internal dimensions 108×52 mm. The wall thickness is 3 mm and the overall length is 100 mm. The adapter has an offset of 25 mm along the Y axis and 25 mm along the Z axis.
Parameter Value Unit
cylinder outer diameter 81 mm
cylinder inlet length 20 mm
rectangle internal length 108 mm
rectangle internal height 52 mm
rectangle inlet length 30 mm
offset Z 25 mm
offset Y 25 mm
total length 100 mm
thickness 3 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀120 mm to 45×45 mm, thickness 3 mm + offset (📦 #3894)

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Parameter Value Unit
cylinder outer diameter 120 mm
cylinder inlet length 25 mm
rectangle internal length 45 mm
rectangle internal height 45 mm
rectangle inlet length 25 mm
offset Z 15 mm
offset Y 15 mm
total length 80 mm
thickness 3 mm
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Round-to-Rectangular Tube Adapter STL file ⌀81 mm to 108×52 mm, thickness 3 mm + offset (📦 #4014)

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Round-to-Rectangular Tube Adapter STL file ⌀81 mm to 108×52 mm, thickness 3 mm + offset
Download this 3D file in STL format of a round-to-rectangular adapter with an external diameter of ⌀81 mm and a rectangular section with internal dimensions 108×52 mm. The shell thickness is 3 mm and the total length is 70 mm. The adapter has an offset of 10 mm along the Y axis and 20 mm along the Z axis.
Parameter Value Unit
cylinder outer diameter 81 mm
cylinder inlet length 15 mm
rectangle internal length 108 mm
rectangle internal height 52 mm
rectangle inlet length 15 mm
offset Z 20 mm
offset Y 10 mm
total length 70 mm
thickness 3 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀81 mm to 110×54 mm, thickness 3 mm + offset (📦 #4022)

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Round-to-Rectangular Tube Adapter STL 3D file ⌀81 mm to 110×54 mm, thickness 3 mm + offset
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Parameter Value Unit
cylinder outer diameter 81 mm
cylinder inlet length 15 mm
rectangle internal length 110 mm
rectangle internal height 54 mm
rectangle inlet length 15 mm
offset Z 20 mm
offset Y 10 mm
total length 70 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀81 mm to 106×50 mm, thickness 3 mm + offset (📦 #1885)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀81 mm to 106×50 mm, thickness 3 mm + offset
Download this model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀81 mm and a rectangular section with inner dimensions 106×50 mm. The shell thickness is 3 mm and the overall length is 100 mm. The adapter has an offset of 10 mm along the Y axis and 10 mm along the Z axis.
Parameter Value Unit
cylinder outer diameter 81 mm
cylinder inlet length 20 mm
rectangle internal length 106 mm
rectangle internal height 50 mm
rectangle inlet length 30 mm
offset Z 10 mm
offset Y 10 mm
total length 100 mm
thickness 3 mm
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Round-to-Rectangular Tube Adapter STL file ⌀60 mm to 150×30 mm, thickness 3 mm + offset (📦 #5944)

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Round-to-Rectangular Tube Adapter STL file ⌀60 mm to 150×30 mm, thickness 3 mm + offset
3D file in STL format of a round-to-rectangular adapter with an external diameter of ⌀60 mm and a rectangular section with inner dimensions 150×30 mm. The shell thickness is 3 mm and the total length is 75 mm. The adapter has an offset of 15 mm along the Y axis and 15 mm along the Z axis. A chamfer is present on the outside of the cylindrical end.
Parameter Value Unit
cylinder outer diameter 60 mm
cylinder inlet length 20 mm
rectangle internal length 150 mm
rectangle internal height 30 mm
rectangle inlet length 10 mm
offset Z 15 mm
offset Y 15 mm
total length 75 mm
thickness 3 mm
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Round-to-Rectangular Tube Adapter STL file ⌀60 mm to 150×30 mm, thickness 2 mm + offset (📦 #5770)

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Round-to-Rectangular Tube Adapter STL file ⌀60 mm to 150×30 mm, thickness 2 mm + offset
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Parameter Value Unit
cylinder outer diameter 60 mm
cylinder inlet length 30 mm
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thickness 2 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀100 mm to 135×75 mm, thickness 2 mm + offset (📦 #1975)

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Parameter Value Unit
cylinder outer diameter 100 mm
cylinder inlet length 35 mm
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rectangle internal height 75 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀81 mm to 108×52 mm, thickness 3 mm + offset (📦 #4011)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀81 mm to 108×52 mm, thickness 3 mm + offset
File in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀81 mm and a rectangular section with internal dimensions 108×52 mm. The wall thickness is 3 mm and the total length is 120 mm. The adapter has an offset of 10 mm along the Y axis.
Parameter Value Unit
cylinder outer diameter 81 mm
cylinder inlet length 15 mm
rectangle internal length 108 mm
rectangle internal height 52 mm
rectangle inlet length 15 mm
offset Z 0 mm
offset Y 10 mm
total length 120 mm
thickness 3 mm
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Round-to-Rectangular Tube Adapter STL file ⌀81 mm to 106×50 mm, thickness 3 mm + offset (📦 #1886)

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Download this 3D model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀81 mm and a rectangular section with internal dimensions 106×50 mm. The shell thickness is 3 mm and the overall length is 100 mm. The adapter has an offset of 25 mm along the Y axis and 25 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 81 mm
cylinder inlet length 20 mm
rectangle internal length 106 mm
rectangle internal height 50 mm
rectangle inlet length 30 mm
offset Z 25 mm
offset Y 25 mm
total length 100 mm
thickness 3 mm
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Round-to-Rectangular Tube Adapter STL file ⌀81 mm to 108×52 mm, thickness 3 mm + offset (📦 #3598)

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Round-to-Rectangular Tube Adapter STL file ⌀81 mm to 108×52 mm, thickness 3 mm + offset
3D file in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀81 mm and a rectangular section with inner dimensions 108×52 mm. The shell thickness is 3 mm and the total length is 120 mm. The adapter has an offset of 45 mm along the Y axis and 25 mm along the Z axis.
Parameter Value Unit
cylinder outer diameter 81 mm
cylinder inlet length 15 mm
rectangle internal length 108 mm
rectangle internal height 52 mm
rectangle inlet length 15 mm
offset Z 25 mm
offset Y 45 mm
total length 120 mm
thickness 3 mm
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Round-to-Rectangular Tube Adapter STL file ⌀30 mm to 80×80 mm, thickness 2 mm + offset (📦 #4730)

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File in STL format of a round-to-rectangular adapter with an outer diameter of ⌀30 mm and a rectangular section with internal dimensions 80×80 mm. The shell thickness is 2 mm and the total length is 100 mm. The adapter has an offset of 22.5 mm along the Y axis.
Parameter Value Unit
cylinder outer diameter 30 mm
cylinder inlet length 30 mm
rectangle internal length 80 mm
rectangle internal height 80 mm
rectangle inlet length 25 mm
offset Z 0 mm
offset Y 22.5 mm
total length 100 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀81 mm to 108×52 mm, thickness 3 mm + offset (📦 #4012)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀81 mm to 108×52 mm, thickness 3 mm + offset
Download this 3D file in STL format of a round-to-rectangular adapter with an external diameter of ⌀81 mm and a rectangular section with inner dimensions 108×52 mm. The wall thickness is 3 mm and the total length is 60 mm. The adapter has an offset of 10 mm along the Y axis.
Parameter Value Unit
cylinder outer diameter 81 mm
cylinder inlet length 15 mm
rectangle internal length 108 mm
rectangle internal height 52 mm
rectangle inlet length 15 mm
offset Z 0 mm
offset Y 10 mm
total length 60 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀150 mm to 80×50 mm, thickness 3 mm + offset (📦 #1571)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀150 mm to 80×50 mm, thickness 3 mm + offset
3D model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀150 mm and a rectangular section with internal dimensions 80×50 mm. The wall thickness is 3 mm and the overall length is 150 mm. The adapter has an offset of 25 mm along the Y axis and 25 mm along the Z axis.
Parameter Value Unit
cylinder outer diameter 150 mm
cylinder inlet length 50 mm
rectangle internal length 80 mm
rectangle internal height 50 mm
rectangle inlet length 50 mm
offset Z 25 mm
offset Y 25 mm
total length 150 mm
thickness 3 mm
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Round-to-Rectangular Tube Adapter STL file ⌀76 mm to 90×40 mm, thickness 3 mm + offset (📦 #7198)

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File in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀76 mm and a rectangular section with internal dimensions 90×40 mm. The wall thickness is 3 mm and the overall length is 150 mm. The adapter has an offset of 10 mm along the Y axis.
Parameter Value Unit
cylinder outer diameter 76 mm
cylinder inlet length 20 mm
rectangle internal length 90 mm
rectangle internal height 40 mm
rectangle inlet length 15 mm
offset Z 0 mm
offset Y 10 mm
total length 150 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀30 mm to 80×80 mm, thickness 2 mm + offset (📦 #4731)

1 object(s) - format STL
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Download this model in STL format of a round-to-rectangular adapter with an external diameter of ⌀30 mm and a rectangular section with inner dimensions 80×80 mm. The shell thickness is 2 mm and the overall length is 150 mm. The adapter has an offset of 25 mm along the Y axis.
Parameter Value Unit
cylinder outer diameter 30 mm
cylinder inlet length 30 mm
rectangle internal length 80 mm
rectangle internal height 80 mm
rectangle inlet length 25 mm
offset Z 0 mm
offset Y 25 mm
total length 150 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀60 mm to 60×30 mm, thickness 2 mm + offset (📦 #1501)

1 object(s) - format STL (4.3/5) 3 vote(s)
Round-to-Rectangular Tube Adapter STL 3D file ⌀60 mm to 60×30 mm, thickness 2 mm + offset
Download this model in STL format of a round-to-rectangular adapter with an external diameter of ⌀60 mm and a rectangular section with internal dimensions 60×30 mm. The shell thickness is 2 mm and the total length is 80 mm. The adapter has an offset of 30 mm along the Y axis and 30 mm along the Z axis. A chamfer is present on the inside of the rectangular end to ease insertion.
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 30 mm
offset Y 30 mm
total length 80 mm
thickness 2 mm
chamfer chamfer on t...

Round-to-Rectangular Tube Adapter STL 3D file ⌀130 mm to 120×60 mm, thickness 3 mm + offset (📦 #7217)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀130 mm to 120×60 mm, thickness 3 mm + offset
Download this file in STL format of a round-to-rectangular adapter with an external diameter of ⌀130 mm and a rectangular section with inner dimensions 120×60 mm. The shell thickness is 3 mm and the total length is 200 mm. The adapter has an offset of 30 mm along the Y axis.
Parameter Value Unit
cylinder outer diameter 130 mm
cylinder inlet length 30 mm
rectangle internal length 120 mm
rectangle internal height 60 mm
rectangle inlet length 30 mm
offset Z 0 mm
offset Y 30 mm
total length 200 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 120×40 mm, thickness 2 mm + offset (📦 #1938)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 120×40 mm, thickness 2 mm + offset
3D file in STL format of a round-to-rectangular adapter with an external diameter of ⌀100 mm and a rectangular section with inner dimensions 120×40 mm. The shell thickness is 2 mm and the total length is 175 mm. The adapter has an offset of 25 mm along the Y axis and 25 mm along the Z axis.
Parameter Value Unit
cylinder outer diameter 100 mm
cylinder inlet length 35 mm
rectangle internal length 120 mm
rectangle internal height 40 mm
rectangle inlet length 75 mm
offset Z 25 mm
offset Y 25 mm
total length 175 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀80 mm to 105×50 mm, thickness 2 mm + offset (📦 #1653)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀80 mm to 105×50 mm, thickness 2 mm + offset
3D file in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀80 mm and a rectangular section with internal dimensions 105×50 mm. The wall thickness is 2 mm and the total length is 150 mm. The adapter has an offset of 25 mm along the Y axis.
Parameter Value Unit
cylinder outer diameter 80 mm
cylinder inlet length 50 mm
rectangle internal length 105 mm
rectangle internal height 50 mm
rectangle inlet length 50 mm
offset Z 0 mm
offset Y 25 mm
total length 150 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀85 mm to 215×25 mm, thickness 4 mm + offset (📦 #7564)

1 object(s) - format STL
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Parameter Value Unit
cylinder outer diameter 85 mm
cylinder inlet length 35 mm
rectangle internal length 215 mm
rectangle internal height 25 mm
rectangle inlet length 35 mm
offset Z 0 mm
offset Y 20 mm
total length 140 mm
thickness 4 mm
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Round-to-Rectangular Tube Adapter STL file ⌀86 mm to 30×100 mm, thickness 3 mm + offset (📦 #7272)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀86 mm to 30×100 mm, thickness 3 mm + offset
File in STL format of a round-to-rectangular adapter with an external diameter of ⌀86 mm and a rectangular section with inner dimensions 30×100 mm. The wall thickness is 3 mm and the overall length is 160 mm. The adapter has an offset of 30 mm along the Y axis.
Parameter Value Unit
cylinder outer diameter 86 mm
cylinder inlet length 20 mm
rectangle internal length 30 mm
rectangle internal height 100 mm
rectangle inlet length 70 mm
offset Z 0 mm
offset Y 30 mm
total length 160 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀90 mm to 80×80 mm, thickness 2 mm + offset (📦 #2048)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀90 mm to 80×80 mm, thickness 2 mm + offset
Model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀90 mm and a rectangular section with inner dimensions 80×80 mm. The shell thickness is 2 mm and the overall length is 150 mm. The adapter has an offset of 25 mm along the Y axis.
Parameter Value Unit
cylinder outer diameter 90 mm
cylinder inlet length 50 mm
rectangle internal length 80 mm
rectangle internal height 80 mm
rectangle inlet length 50 mm
offset Z 0 mm
offset Y 25 mm
total length 150 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀110 mm to 127×127 mm, thickness 2 mm + offset (📦 #8803)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀110 mm to 127×127 mm, thickness 2 mm + offset
3D file in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀110 mm and a rectangular section with internal dimensions 127×127 mm. The shell thickness is 2 mm and the total length is 100 mm. The adapter has an offset of 10 mm along the Y axis and 10 mm along the Z axis.
Parameter Value Unit
cylinder outer diameter 110 mm
cylinder inlet length 20 mm
rectangle internal length 127 mm
rectangle internal height 127 mm
rectangle inlet length 20 mm
offset Z 10 mm
offset Y 10 mm
total length 100 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀100 mm to 106×50 mm, thickness 3 mm + offset (📦 #4609)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀100 mm to 106×50 mm, thickness 3 mm + offset
File in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀100 mm and a rectangular section with internal dimensions 106×50 mm. The shell thickness is 3 mm and the total length is 100 mm. The adapter has an offset of 25 mm along the Y 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 100 mm
cylinder inlet length 20 mm
rectangle internal length 106 mm
rectangle internal height 50 mm
rectangle inlet length 30 mm
offset Z 0 mm
offset Y 25 mm
total length 100 mm
thickness 3 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL 3D file ⌀109 mm to 110×55 mm, thickness 2 mm + offset (📦 #2332)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀109 mm to 110×55 mm, thickness 2 mm + offset
Download this 3D file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀109 mm and a rectangular section with internal dimensions 110×55 mm. The shell thickness is 2 mm and the overall length is 107 mm. The adapter has an offset of 20 mm along the Y axis and 30 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 109 mm
cylinder inlet length 20 mm
rectangle internal length 110 mm
rectangle internal height 55 mm
rectangle inlet length 20 mm
offset Z 30 mm
offset Y 20 mm
total length 107 mm
thickness 2 mm
chamfer chamfers on ...

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
chamfer no chamfer