Custom Tubing adapter STL file ⌀ 50–20 mm (Length: 80 mm) 📦#8580

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Inline tube coupler ⌀50 mm to ⌀20 mm in STL 3D format. Length of this junction is 80 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 50 mm, the smaller one of 20 mm. The ends are raw.
Generation date: 2026-04-23
3D Model Tubing adapter STL file ⌀ 50–20 mm (Length: 80 mm)

3D model download

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  • inline-tube-adapter-lenA50mm-d_model8580-nb0_dd{id}.stl : 5 Mo
STL Mesh quality : Linear deflection 0.05 Angular deflection 0.05
No compliance warranty No compliance warranty
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Values for this model

This model was generated by the Inline tube adapter template, with the following values:
Parameter Value
#1 side A length 50 mm (≃1.97 in)
#2 side A outer diameter 50 mm (≃1.97 in)
#3 side A thickness 3 mm (≃1/8 in)
#4 side B length 20 mm (≃0.79 in)
#5 side B outer diameter 20 mm (≃0.79 in)
#6 side B thickness 3 mm (≃1/8 in)
#7 transition length 10 mm (≃0.39 in)
#8 axis offset 0 mm (0 in)
#9 ends fillet no fillet
Metadata Value
inner diameter (side A) 44 mm (≃1.73 in)
inner diameter (side B) 14 mm (≃9/16 in)
total length 80 mm (≃3.15 in)
illustration of the parameters
Parameter overview

Labels are used in the naming of the downloaded 3D files.

Parameter Label
#1 side A length lenA
#2 side A outer diameter diA
#3 side A thickness thA
#4 side B length lenB
#5 side B outer diameter diB
#6 side B thickness thB
#7 transition length tra
#8 axis offset ofs
#9 ends fillet fil

Related 3D models

To search for a model based on your own parameters, go to the template page Inline tube adapter 

Tube adapter STL file ⌀ 36–31 mm (Length: 75 mm) (📦 #7133)

1 object(s) - format STL
Tube adapter STL file ⌀ 36–31 mm (Length: 75 mm)
Straight tubing adapter ⌀36 mm to ⌀31 mm in STL format. Length of this adapter is 75 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 40 mm, the smaller one of 30 mm. The ends are raw.
Parameter Value Unit
side A length 40 mm
side A outer diameter 36 mm
side A thickness 3 mm
side B length 30 mm
side B outer diameter 31 mm
side B thickness 3 mm
transition length 5 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL 3D file ⌀ 32–30 mm (Length: 75 mm) (📦 #7132)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 32–30 mm (Length: 75 mm)
Straight sleeve ⌀32 mm to ⌀30 mm in STL format. Total length of this sleeve is 75 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 40 mm, the smaller one of 30 mm. The ends have no fillet.
Parameter Value Unit
side A length 40 mm
side A outer diameter 32 mm
side A thickness 3 mm
side B length 30 mm
side B outer diameter 30 mm
side B thickness 3 mm
transition length 5 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 60–23 mm (Length: 74 mm) (📦 #3340)

1 object(s) - format STL
Tube adapter STL file ⌀ 60–23 mm (Length: 74 mm)
Straight sleeve ⌀60 mm to ⌀23 mm in STL 3D format. Final length of this coupler is 74 mm. The larger-diameter tube has a thickness of 2.2 mm and a sleeve length of 50 mm. The smaller-diameter tube has a thickness of 2 mm and a length of 18 mm. The ends are raw.
Parameter Value Unit
side A length 50 mm
side A outer diameter 60 mm
side A thickness 2.2 mm
side B length 18 mm
side B outer diameter 23 mm
side B thickness 2 mm
transition length 6 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 70–32 mm (Length: 62 mm) (📦 #6762)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 70–32 mm (Length: 62 mm)
Inline tube reducer ⌀70 mm to ⌀32 mm in STL format. Length of this sleeve is 62 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 32 mm, the smaller one of 20 mm. The ends are raw.
Parameter Value Unit
side A length 32 mm
side A outer diameter 70 mm
side A thickness 3 mm
side B length 20 mm
side B outer diameter 32 mm
side B thickness 3 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL file ⌀ 50–32 mm (Length: 90 mm) (📦 #4381)

1 object(s) - format STL
Tubing adapter STL file ⌀ 50–32 mm (Length: 90 mm)
Tubing adapter ⌀50 mm to ⌀32 mm in STL 3D format. Length of this reducer is 90 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 40 mm, the smaller one of 40 mm as well. The ends are not rounded.
Parameter Value Unit
side A length 40 mm
side A outer diameter 50 mm
side A thickness 3 mm
side B length 40 mm
side B outer diameter 32 mm
side B thickness 3 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL file ⌀ 49–32 mm (Length: 90 mm) (📦 #4378)

1 object(s) - format STL
Tubing adapter STL file ⌀ 49–32 mm (Length: 90 mm)
Straight tube fitting ⌀49 mm to ⌀32 mm in STL 3D format. Length of this reducer is 90 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 40 mm, the smaller one of 40 mm as well. The ends are not rounded.
Parameter Value Unit
side A length 40 mm
side A outer diameter 49 mm
side A thickness 3 mm
side B length 40 mm
side B outer diameter 32 mm
side B thickness 3 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 51–32 mm (Length: 90 mm) (📦 #4605)

1 object(s) - format STL
Tube adapter STL file ⌀ 51–32 mm (Length: 90 mm)
Inline tubing adapter ⌀51 mm to ⌀32 mm in STL 3D format. Length of this junction is 90 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 40 mm, the smaller one of 40 mm as well. The ends are not rounded.
Parameter Value Unit
side A length 40 mm
side A outer diameter 51 mm
side A thickness 3 mm
side B length 40 mm
side B outer diameter 32 mm
side B thickness 3 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL 3D file ⌀ 47–32 mm (Length: 90 mm) (📦 #4377)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 47–32 mm (Length: 90 mm)
Inline tube junction ⌀47 mm to ⌀32 mm in STL format. Final length of this sleeve is 90 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 40 mm, the smaller one of 40 mm as well. The ends are raw.
Parameter Value Unit
side A length 40 mm
side A outer diameter 47 mm
side A thickness 3 mm
side B length 40 mm
side B outer diameter 32 mm
side B thickness 3 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL 3D file ⌀ 35–34 mm (Length: 55 mm) (📦 #8183)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 35–34 mm (Length: 55 mm)
Straight tube reducer ⌀35 mm to ⌀34 mm in STL 3D format. Total length of this fitting is 55 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 30 mm, the smaller one of 20 mm. The ends are not rounded.
Parameter Value Unit
side A length 30 mm
side A outer diameter 35 mm
side A thickness 3 mm
side B length 20 mm
side B outer diameter 34 mm
side B thickness 3 mm
transition length 5 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL 3D file ⌀ 70–32 mm (Length: 52 mm) (📦 #6763)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 70–32 mm (Length: 52 mm)
Inline tube coupler ⌀70 mm to ⌀32 mm in STL 3D format. Total length of this adapter is 52 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 32 mm, the smaller one of 10 mm. The ends have no fillet.
Parameter Value Unit
side A length 32 mm
side A outer diameter 70 mm
side A thickness 3 mm
side B length 10 mm
side B outer diameter 32 mm
side B thickness 3 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 39–32 mm (Length: 90 mm) (📦 #4181)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 39–32 mm (Length: 90 mm)
Inline tubing adapter ⌀39 mm to ⌀32 mm in STL 3D format. Final length of this reducer is 90 mm. The thickness of the tubes is identical: 2.3 mm. The larger-diameter tube has a length of 40 mm, the smaller one of 30 mm. The ends are not rounded.
Parameter Value Unit
side A length 40 mm
side A outer diameter 39 mm
side A thickness 2.3 mm
side B length 30 mm
side B outer diameter 32 mm
side B thickness 2.3 mm
transition length 20 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 38–32 mm (Length: 90 mm) (📦 #4840)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 38–32 mm (Length: 90 mm)
Straight tube coupler ⌀38 mm to ⌀32 mm in STL format. Final length of this junction is 90 mm. The thickness of the tubes is identical: 2.3 mm. The larger-diameter tube has a length of 40 mm, the smaller one of 30 mm. The ends are raw.
Parameter Value Unit
side A length 40 mm
side A outer diameter 38 mm
side A thickness 2.3 mm
side B length 30 mm
side B outer diameter 32 mm
side B thickness 2.3 mm
transition length 20 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 42–37 mm (Length: 70 mm) (📦 #8212)

1 object(s) - format STL
Tube adapter STL file ⌀ 42–37 mm (Length: 70 mm)
Tube junction ⌀42 mm to ⌀37 mm in STL 3D format. Total length of this connector is 70 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 30 mm, the smaller one of 30 mm as well. The ends are raw.
Parameter Value Unit
side A length 30 mm
side A outer diameter 42 mm
side A thickness 3 mm
side B length 30 mm
side B outer diameter 37 mm
side B thickness 3 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 45–41 mm (Length: 80 mm) (📦 #5480)

1 object(s) - format STL
Tube adapter STL file ⌀ 45–41 mm (Length: 80 mm)
Inline tube coupler ⌀45 mm to ⌀41 mm in STL format. Total length of this junction is 80 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 35 mm, the smaller one of 35 mm as well. The ends are not rounded.
Parameter Value Unit
side A length 35 mm
side A outer diameter 45 mm
side A thickness 3 mm
side B length 35 mm
side B outer diameter 41 mm
side B thickness 3 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 50–40 mm (Length: 90 mm) (📦 #3871)

1 object(s) - format STL
Tube adapter STL file ⌀ 50–40 mm (Length: 90 mm)
Tube junction ⌀50 mm to ⌀40 mm in STL format. Final length of this coupler is 90 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 40 mm, the smaller one of 40 mm as well. The ends have no fillet.
Parameter Value Unit
side A length 40 mm
side A outer diameter 50 mm
side A thickness 3 mm
side B length 40 mm
side B outer diameter 40 mm
side B thickness 3 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL 3D file ⌀ 40–32 mm (Length: 80 mm) (📦 #5043)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 40–32 mm (Length: 80 mm)
Inline tube junction ⌀40 mm to ⌀32 mm in STL format. Final length of this fitting is 80 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 30 mm, the smaller one of 30 mm as well. The ends are raw.
Parameter Value Unit
side A length 30 mm
side A outer diameter 40 mm
side A thickness 3 mm
side B length 30 mm
side B outer diameter 32 mm
side B thickness 3 mm
transition length 20 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 51–38 mm (Length: 100 mm) (📦 #10135)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 51–38 mm (Length: 100 mm)
Straight tubing adapter ⌀51 mm to ⌀38 mm in STL format. Total length of this adapter is 100 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 40 mm, the smaller one of 40 mm as well. The ends are raw.
Parameter Value Unit
side A length 40 mm
side A outer diameter 51 mm
side A thickness 3 mm
side B length 40 mm
side B outer diameter 38 mm
side B thickness 3 mm
transition length 20 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL file ⌀ 42–41 mm (Length: 65 mm) (📦 #7710)

1 object(s) - format STL
Tubing adapter STL file ⌀ 42–41 mm (Length: 65 mm)
Inline sleeve ⌀42 mm to ⌀41 mm in STL 3D format. Total length of this reducer is 65 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 30 mm, the smaller one of 30 mm as well. The ends are raw.
Parameter Value Unit
side A length 30 mm
side A outer diameter 42 mm
side A thickness 3 mm
side B length 30 mm
side B outer diameter 41 mm
side B thickness 3 mm
transition length 5 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 48–40 mm (Length: 90 mm) (📦 #8140)

1 object(s) - format STL
Tube adapter STL file ⌀ 48–40 mm (Length: 90 mm)
Tube coupler ⌀48 mm to ⌀40 mm in STL 3D format. Final length of this adapter is 90 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 50 mm, the smaller one of 30 mm. The ends are raw.
Parameter Value Unit
side A length 50 mm
side A outer diameter 48 mm
side A thickness 2 mm
side B length 30 mm
side B outer diameter 40 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL 3D file ⌀ 46–40 mm (Length: 91 mm) (📦 #8135)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 46–40 mm (Length: 91 mm)
Inline tube coupler ⌀46 mm to ⌀40 mm in STL 3D format. Total length of this coupler is 91 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 50 mm, the smaller one of 30 mm. The ends have no fillet.
Parameter Value Unit
side A length 50 mm
side A outer diameter 46 mm
side A thickness 2 mm
side B length 30 mm
side B outer diameter 40 mm
side B thickness 2 mm
transition length 11 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL file ⌀ 46–38 mm (Length: 80 mm) (📦 #5044)

1 object(s) - format STL
Tubing adapter STL file ⌀ 46–38 mm (Length: 80 mm)
Inline fitting ⌀46 mm to ⌀38 mm in STL 3D format. Final length of this coupler is 80 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 30 mm, the smaller one of 30 mm as well. The ends are raw.
Parameter Value Unit
side A length 30 mm
side A outer diameter 46 mm
side A thickness 3 mm
side B length 30 mm
side B outer diameter 38 mm
side B thickness 3 mm
transition length 20 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL file ⌀ 48–41 mm (Length: 90 mm) (📦 #8137)

1 object(s) - format STL
Tubing adapter STL file ⌀ 48–41 mm (Length: 90 mm)
Inline fitting ⌀48 mm to ⌀41 mm in STL format. Final length of this adapter is 90 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 50 mm, the smaller one of 30 mm. The ends are raw.
Parameter Value Unit
side A length 50 mm
side A outer diameter 48 mm
side A thickness 2 mm
side B length 30 mm
side B outer diameter 41 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 47–41 mm (Length: 90 mm) (📦 #8139)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 47–41 mm (Length: 90 mm)
Tubing reducer ⌀47 mm to ⌀41 mm in STL 3D format. Final length of this junction is 90 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 50 mm, the smaller one of 30 mm. The ends have no fillet.
Parameter Value Unit
side A length 50 mm
side A outer diameter 47 mm
side A thickness 2 mm
side B length 30 mm
side B outer diameter 41 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL file ⌀ 35–31 mm (Length: 80 mm) (📦 #8143)

1 object(s) - format STL
Tubing adapter STL file ⌀ 35–31 mm (Length: 80 mm)
Tube fitting ⌀35 mm to ⌀31 mm in STL 3D format. Total length of this sleeve is 80 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 40 mm, the smaller one of 30 mm. The ends are not rounded.
Parameter Value Unit
side A length 40 mm
side A outer diameter 35 mm
side A thickness 2 mm
side B length 30 mm
side B outer diameter 31 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL 3D file ⌀ 32–19 mm (Length: 65 mm) (📦 #4497)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 32–19 mm (Length: 65 mm)
Tube fitting ⌀32 mm to ⌀19 mm in STL 3D format. Length of this junction is 65 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 35 mm, the smaller one of 20 mm. The ends are not rounded.
Parameter Value Unit
side A length 35 mm
side A outer diameter 32 mm
side A thickness 2 mm
side B length 20 mm
side B outer diameter 19 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL file ⌀ 38–37 mm (Length: 80 mm) (📦 #7705)

1 object(s) - format STL
Tubing adapter STL file ⌀ 38–37 mm (Length: 80 mm)
Inline tube coupler ⌀38 mm to ⌀37 mm in STL 3D format. Final length of this coupler is 80 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 30 mm, the smaller one of 30 mm as well. The ends are raw.
Parameter Value Unit
side A length 30 mm
side A outer diameter 38 mm
side A thickness 3 mm
side B length 30 mm
side B outer diameter 37 mm
side B thickness 3 mm
transition length 20 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL 3D file ⌀ 62–32 mm (Length: 124 mm) (📦 #6512)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 62–32 mm (Length: 124 mm)
Straight tube adapter ⌀62 mm to ⌀32 mm in STL 3D format. Total length of this junction is 124 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 64 mm, the smaller one of 40 mm. The ends have no fillet.
Parameter Value Unit
side A length 64 mm
side A outer diameter 62 mm
side A thickness 3 mm
side B length 40 mm
side B outer diameter 32 mm
side B thickness 3 mm
transition length 20 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 53–35 mm (Length: 100 mm) (📦 #2985)

1 object(s) - format STL
Tube adapter STL file ⌀ 53–35 mm (Length: 100 mm)
Straight tube fitting ⌀53 mm to ⌀35 mm in STL 3D format. Length of this adapter is 100 mm. The larger-diameter tube has a thickness of 4 mm and a length of 45 mm. The smaller-diameter tube has a thickness of 3 mm and a length of 40 mm. The ends are not rounded.
Parameter Value Unit
side A length 45 mm
side A outer diameter 53 mm
side A thickness 4 mm
side B length 40 mm
side B outer diameter 35 mm
side B thickness 3 mm
transition length 15 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL 3D file ⌀ 38–20 mm (Length: 77 mm) (📦 #3809)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 38–20 mm (Length: 77 mm)
Inline tube junction ⌀38 mm to ⌀20 mm in STL format. Length of this junction is 77 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 40 mm, the smaller one of 15 mm. The ends have no fillet.
Parameter Value Unit
side A length 40 mm
side A outer diameter 38 mm
side A thickness 2 mm
side B length 15 mm
side B outer diameter 20 mm
side B thickness 2 mm
transition length 22 mm
axis offset 0 mm
ends fillet no fillet