Custom Round-to-Rectangular Tube Adapter STL file ⌀70 mm to 100×30 mm, thickness 3 mm 📦#4773

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Download this model in STL format of a round-to-rectangular adapter with an external diameter of ⌀70 mm and a rectangular section with inner dimensions 100×30 mm. The shell thickness is 3 mm and the total length is 150 mm. A chamfer is applied on the inside of the rectangular end.
Generation date: 2025-12-14
3D Model Round-to-Rectangular Tube Adapter STL file ⌀70 mm to 100×30 mm, thickness 3 mm

3D model download

Free
  • round-to-rectangular-adapter-d_model4773-nb0_dd{id}.stl : 1.7 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 70 mm (≃2 3/4 in)
#2 cylinder inlet length 15 mm (≃0.59 in)
#3 rectangle internal length 100 mm (≃3 15/16 in)
#4 rectangle internal height 30 mm (≃1 3/16 in)
#5 rectangle inlet length 100 mm (≃3 15/16 in)
#6 offset Z 0 mm (0 in)
#7 offset Y 0 mm (0 in)
#8 total length 150 mm (≃5.91 in)
#9 thickness 3 mm (≃1/8 in)
#10 chamfer chamfer on the inside
of the rectangular tube
Metadata Value
Cylinder internal diameter 64 mm (≃2.52 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 ⌀70 mm to 100×30 mm, thickness 3 mm (📦 #4774)

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Round-to-Rectangular Tube Adapter STL 3D file ⌀70 mm to 100×30 mm, thickness 3 mm
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Parameter Value Unit
cylinder outer diameter 70 mm
cylinder inlet length 25 mm
rectangle internal length 100 mm
rectangle internal height 30 mm
rectangle inlet length 100 mm
offset Z 0 mm
offset Y 0 mm
total length 155 mm
thickness 3 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀100 mm to 200×40 mm, thickness 3 mm + offset (📦 #7431)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀100 mm to 200×40 mm, thickness 3 mm + offset
Model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀100 mm and a rectangular section with internal dimensions 200×40 mm. The shell thickness is 3 mm and the overall length is 150 mm. The adapter has an offset of 3 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 100 mm
cylinder inlet length 25 mm
rectangle internal length 200 mm
rectangle internal height 40 mm
rectangle inlet length 80 mm
offset Z 3 mm
offset Y 0 mm
total length 150 mm
thickness 3 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 ⌀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
offset Z 13 mm
offset Y 0 mm
total length 120 mm
thickness 4 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)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀78 mm to 104.5×50.8 mm, thickness 4 mm + offset
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
offset Z 13 mm
offset Y 0 mm
total length 120 mm
thickness 4 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀100 mm to 200×25 mm, thickness 2 mm (📦 #2093)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀100 mm to 200×25 mm, thickness 2 mm
3D file in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀100 mm and a rectangular section with inner dimensions 200×25 mm. The wall thickness is 2 mm and the total length is 147 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 100 mm
cylinder inlet length 20 mm
rectangle internal length 200 mm
rectangle internal height 25 mm
rectangle inlet length 100 mm
offset Z 0 mm
offset Y 0 mm
total length 147 mm
thickness 2 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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Round-to-Rectangular Tube Adapter STL file ⌀78 mm to 100×55 mm, thickness 4 mm + offset
File in STL format of a round-to-rectangular adapter with an external diameter of ⌀78 mm and a rectangular section with inner dimensions 100×55 mm. The wall thickness is 4 mm and the total length is 120 mm. The adapter has an offset of 8 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
rectangle internal height 55 mm
rectangle inlet length 64 mm
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offset Y 0 mm
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thickness 4 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀106 mm to 50×50 mm, thickness 3 mm (📦 #2954)

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Round-to-Rectangular Tube Adapter STL 3D file ⌀106 mm to 50×50 mm, thickness 3 mm
Download this file in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀106 mm and a rectangular section with internal dimensions 50×50 mm. The wall thickness is 3 mm and the overall length is 100 mm. A chamfer is present on the outside of the cylindrical end to ease insertion.
Parameter Value Unit
cylinder outer diameter 106 mm
cylinder inlet length 15 mm
rectangle internal length 50 mm
rectangle internal height 50 mm
rectangle inlet length 60 mm
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offset Y 0 mm
total length 100 mm
thickness 3 mm
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Round-to-Rectangular Tube Adapter STL file ⌀21 mm to 23×23 mm, thickness 3 mm (📦 #6983)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀21 mm to 23×23 mm, thickness 3 mm
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.
Parameter Value Unit
cylinder outer diameter 21 mm
cylinder inlet length 5 mm
rectangle internal length 23 mm
rectangle internal height 23 mm
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offset Y 0 mm
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Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 200×25 mm, thickness 2 mm + offset (📦 #2094)

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Parameter Value Unit
cylinder outer diameter 100 mm
cylinder inlet length 20 mm
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Parameter Value Unit
cylinder outer diameter 75 mm
cylinder inlet length 25 mm
rectangle internal length 84 mm
rectangle internal height 80 mm
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Round-to-Rectangular Tube Adapter STL file ⌀78 mm to 100×47 mm, thickness 4 mm + offset (📦 #6873)

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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
rectangle internal height 47 mm
rectangle inlet length 64 mm
offset Z 10 mm
offset Y 0 mm
total length 99 mm
thickness 4 mm
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Round-to-Rectangular Tube Adapter STL file ⌀90 mm to 100×50 mm, thickness 2 mm (📦 #3061)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀90 mm to 100×50 mm, thickness 2 mm
Download this 3D model in STL format of a round-to-rectangular adapter with an external diameter of ⌀90 mm and a rectangular section with internal dimensions 100×50 mm. The shell thickness is 2 mm and the overall length is 120 mm.
Parameter Value Unit
cylinder outer diameter 90 mm
cylinder inlet length 20 mm
rectangle internal length 100 mm
rectangle internal height 50 mm
rectangle inlet length 80 mm
offset Z 0 mm
offset Y 0 mm
total length 120 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL file ⌀78 mm to 100×51 mm, thickness 4 mm + offset (📦 #6874)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀78 mm to 100×51 mm, thickness 4 mm + offset
Download this file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀78 mm and a rectangular section with internal dimensions 100×51 mm. The shell thickness is 4 mm and the overall length is 99 mm. The adapter has an offset of 10 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 78 mm
cylinder inlet length 15 mm
rectangle internal length 100 mm
rectangle internal height 51 mm
rectangle inlet length 64 mm
offset Z 10 mm
offset Y 0 mm
total length 99 mm
thickness 4 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL 3D file ⌀148 mm to 145.0×70 mm, thickness 3 mm (📦 #2308)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀148 mm to 145.0×70 mm, thickness 3 mm
File in STL format of a round-to-rectangular adapter with an outer diameter of ⌀148 mm and a rectangular section with internal dimensions 145.0×70 mm. The wall thickness is 3 mm and the overall length is 150 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 148 mm
cylinder inlet length 25 mm
rectangle internal length 145.0 mm
rectangle internal height 70 mm
rectangle inlet length 80 mm
offset Z 0 mm
offset Y 0 mm
total length 150 mm
thickness 3 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL 3D file ⌀78 mm to 100×55 mm, thickness 4 mm + offset (📦 #6894)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀78 mm to 100×55 mm, thickness 4 mm + offset
Model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀78 mm and a rectangular section with internal dimensions 100×55 mm. The wall thickness is 4 mm and the overall length is 120 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 to ease insertion.
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
offset Z 15 mm
offset Y 0 mm
total length 120 mm
thickness 4 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL file ⌀78 mm to 100×51 mm, thickness 4 mm + offset (📦 #6892)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀78 mm to 100×51 mm, thickness 4 mm + offset
3D model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀78 mm and a rectangular section with internal dimensions 100×51 mm. The shell thickness is 4 mm and the overall length is 120 mm. The adapter has an offset of 20.5 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 64 mm
offset Z 20.5 mm
offset Y 0 mm
total length 120 mm
thickness 4 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL file ⌀126 mm to 139×63.5 mm, thickness 3 mm + offset (📦 #2121)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀126 mm to 139×63.5 mm, thickness 3 mm + offset
Download this 3D model in STL format of a round-to-rectangular adapter with an external diameter of ⌀126 mm and a rectangular section with internal dimensions 139×63.5 mm. The wall thickness is 3 mm and the total length is 150 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 126 mm
cylinder inlet length 30 mm
rectangle internal length 139 mm
rectangle internal height 63.5 mm
rectangle inlet length 80 mm
offset Z 3 mm
offset Y 3 mm
total length 150 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀78 mm to 100×55 mm, thickness 4 mm + offset (📦 #6893)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀78 mm to 100×55 mm, thickness 4 mm + offset
Download this 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 100×55 mm. The shell thickness is 4 mm and the overall length is 120 mm. The adapter has an offset of 20.5 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 78 mm
cylinder inlet length 15 mm
rectangle internal length 100 mm
rectangle internal height 55 mm
rectangle inlet length 64 mm
offset Z 20.5 mm
offset Y 0 mm
total length 120 mm
thickness 4 mm
chamfer chamfers on ...

Round-to-Rectangular Tube Adapter STL file ⌀84 mm to 31×100 mm, thickness 2 mm + offset (📦 #6823)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀84 mm to 31×100 mm, thickness 2 mm + offset
Download this file in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀84 mm and a rectangular section with inner dimensions 31×100 mm. The shell thickness is 2 mm and the overall length is 140 mm. The adapter has an offset of 10 mm along the Y 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 84 mm
cylinder inlet length 20 mm
rectangle internal length 31 mm
rectangle internal height 100 mm
rectangle inlet length 100 mm
offset Z 0 mm
offset Y 10 mm
total length 140 mm
thickness 2 mm
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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
cylinder inlet length 30 mm
rectangle internal length 85 mm
rectangle internal height 85 mm
rectangle inlet length 85 mm
offset Z 0 mm
offset Y 0 mm
total length 150 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀26 mm to 24×23 mm, thickness 4 mm (📦 #7001)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀26 mm to 24×23 mm, thickness 4 mm
Download this 3D file in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀26 mm and a rectangular section with inner dimensions 24×23 mm. The wall thickness is 4 mm and the total length is 136 mm.
Parameter Value Unit
cylinder outer diameter 26 mm
cylinder inlet length 7 mm
rectangle internal length 24 mm
rectangle internal height 23 mm
rectangle inlet length 98 mm
offset Z 0 mm
offset Y 0 mm
total length 136 mm
thickness 4 mm
chamfer no chamfer

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 ...

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
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀22 mm to 24×22 mm, thickness 4 mm (📦 #6993)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀22 mm to 24×22 mm, thickness 4 mm
Download this 3D model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀22 mm and a rectangular section with internal dimensions 24×22 mm. The shell thickness is 4 mm and the overall length is 136 mm.
Parameter Value Unit
cylinder outer diameter 22 mm
cylinder inlet length 7 mm
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
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀20 mm to 23.5×15.5 mm, thickness 4 mm (📦 #6980)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀20 mm to 23.5×15.5 mm, thickness 4 mm
Model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀20 mm and a rectangular section with internal dimensions 23.5×15.5 mm. The shell thickness is 4 mm and the overall length is 135 mm.
Parameter Value Unit
cylinder outer diameter 20 mm
cylinder inlet length 5 mm
rectangle internal length 23.5 mm
rectangle internal height 15.5 mm
rectangle inlet length 97 mm
offset Z 00 mm
offset Y 00 mm
total length 135 mm
thickness 4 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 60×5 mm, thickness 3 mm (📦 #9116)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 60×5 mm, thickness 3 mm
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 60×5 mm. The shell thickness is 3 mm and the overall length is 180 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 60 mm
rectangle internal length 60 mm
rectangle internal height 5 mm
rectangle inlet length 100 mm
offset Z 0 mm
offset Y 0 mm
total length 180 mm
thickness 3 mm
chamfer chamfer on t...

Round-to-Rectangular Tube Adapter STL 3D file ⌀128 mm to 114×58 mm, thickness 3 mm (📦 #2416)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀128 mm to 114×58 mm, thickness 3 mm
3D model in STL format of a round-to-rectangular adapter with an external diameter of ⌀128 mm and a rectangular section with internal dimensions 114×58 mm. The shell thickness is 3 mm and the total length is 220 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 128 mm
cylinder inlet length 50 mm
rectangle internal length 114 mm
rectangle internal height 58 mm
rectangle inlet length 99 mm
offset Z 0 mm
offset Y 0 mm
total length 220 mm
thickness 3 mm
chamfer chamfers on ...