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Tube adapter STL file ⌀ 39–31 mm (Length: 80 mm) 📦#2553

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Tube connector ⌀39 mm to ⌀31 mm in STL format. Length of this adapter is 80 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 20 mm, the smaller one of 40 mm. The ends feature an external fillet.
Generation date: 2025-10-18
3D Model Tube adapter STL file ⌀ 39–31 mm (Length: 80 mm)

3D model download

Free
  • inline-tube-adapter-lenA20mm-d_model2553-nb0_dd{id}.stl : 3.8 Mo
STL Mesh quality : Linear deflection 0.05 Angular deflection 0.05
No compliance warranty No compliance warranty
(attribution - commercial use allowed)
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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 20 mm
#2 side A outer diameter 39 mm
#3 side A thickness 2 mm
#4 side B length 40 mm
#5 side B outer diameter 31 mm
#6 side B thickness 2 mm
#7 transition length 20 mm
#8 axis offset 0 mm
#9 ends fillet fillet on the outside
illustration of the parameters
Representation of the parameters

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 3D file ⌀ 38–10 mm (Length: 90 mm) (📦 #1269)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 38–10 mm (Length: 90 mm)
Straight tube reducer ⌀38 mm to ⌀10 mm in STL 3D format. Total length of this coupler is 90 mm. The larger-diameter tube has a thickness of 2.5 mm and a length of 30 mm. The smaller-diameter tube has a thickness of 2 mm and a length of 30 mm as well. The ends are rounded on the outside to make tube connection easier.
Parameter Value Unit
side A length 30 mm
side A outer diameter 38 mm
side A thickness 2.5 mm
side B length 30 mm
side B outer diameter 10 mm
side B thickness 2 mm
transition length 30 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 39–29 mm (Length: 90 mm) (📦 #2319)

1 object(s) - format STL
Tube adapter STL file ⌀ 39–29 mm (Length: 90 mm)
Tube coupler ⌀39 mm to ⌀29 mm in STL format. Final length of this coupler is 90 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 30 mm, the smaller one of 40 mm. The ends are raw.
Parameter Value Unit
side A length 30 mm
side A outer diameter 39 mm
side A thickness 2 mm
side B length 40 mm
side B outer diameter 29 mm
side B thickness 2 mm
transition length 20 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 40–29 mm (Length: 90 mm) (📦 #2321)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 40–29 mm (Length: 90 mm)
Inline tube coupler ⌀40 mm to ⌀29 mm in STL 3D format. Total length of this connector is 90 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 30 mm, the smaller one of 40 mm. The ends have no fillet.
Parameter Value Unit
side A length 30 mm
side A outer diameter 40 mm
side A thickness 2 mm
side B length 40 mm
side B outer diameter 29 mm
side B thickness 2 mm
transition length 20 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 44–24 mm (Length: 90 mm) (📦 #2322)

1 object(s) - format STL
Tube adapter STL file ⌀ 44–24 mm (Length: 90 mm)
Straight tube adapter ⌀44 mm to ⌀24 mm in STL format. Length of this junction is 90 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 30 mm, the smaller one of 40 mm. The ends have no fillet.
Parameter Value Unit
side A length 30 mm
side A outer diameter 44 mm
side A thickness 2 mm
side B length 40 mm
side B outer diameter 24 mm
side B thickness 2 mm
transition length 20 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 20–5 mm (Length: 65 mm) (📦 #1261)

1 object(s) - format STL (5.0/5) 1 vote(s)
Tube adapter STL file ⌀ 20–5 mm (Length: 65 mm)
Tube fitting ⌀20 mm to ⌀5 mm in STL 3D format. Length of this reducer is 65 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 30 mm, the smaller one of 30 mm as well. The ends are rounded on the outside to facilitate the connection of the two tubes.
Parameter Value Unit
side A length 30 mm
side A outer diameter 20 mm
side A thickness 2 mm
side B length 30 mm
side B outer diameter 5 mm
side B thickness 2 mm
transition length 5 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 66–41 mm (Length: 90 mm) (📦 #1793)

1 object(s) - format STL
Tube adapter STL file ⌀ 66–41 mm (Length: 90 mm)
Straight tube adapter ⌀66 mm to ⌀41 mm in STL format. Length of this reducer is 90 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 40 mm, the smaller one of 45 mm. The ends have a fillet on the outside to facilitate the connection of the two tubes.
Parameter Value Unit
side A length 40 mm
side A outer diameter 66 mm
side A thickness 2 mm
side B length 45 mm
side B outer diameter 41 mm
side B thickness 2 mm
transition length 5 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL 3D file ⌀ 30–26 mm (Length: 50 mm) (📦 #1109)

1 object(s) - format STL (3.5/5) 2 vote(s)
Tube adapter STL 3D file ⌀ 30–26 mm (Length: 50 mm)
Inline tube coupler ⌀30 mm to ⌀26 mm in STL format. Total length of this connector is 50 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 15 mm, the smaller one of 30 mm. The ends have no fillet.
Parameter Value Unit
side A length 15 mm
side A outer diameter 30 mm
side A thickness 2 mm
side B length 30 mm
side B outer diameter 26 mm
side B thickness 2 mm
transition length 5 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 32–15 mm (Length: 60 mm) (📦 #2442)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 32–15 mm (Length: 60 mm)
Tube coupler ⌀32 mm to ⌀15 mm in STL format. Length of this junction is 60 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 20 mm, the smaller one of 20 mm as well. The ends feature an internal fillet to facilitate the connection of the two tubes.
Parameter Value Unit
side A length 20 mm
side A outer diameter 32 mm
side A thickness 2 mm
side B length 20 mm
side B outer diameter 15 mm
side B thickness 2 mm
transition length 20 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL 3D file ⌀ 44–16 mm (Length: 90 mm) (📦 #1270)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 44–16 mm (Length: 90 mm)
Inline fitting ⌀44 mm to ⌀16 mm in STL format. Final length of this sleeve is 90 mm. The larger-diameter tube has a thickness of 2.5 mm and a sleeve length of 30 mm. The smaller-diameter tube has a thickness of 2 mm and a length of 30 mm as well. The ends are raw.
Parameter Value Unit
side A length 30 mm
side A outer diameter 44 mm
side A thickness 2.5 mm
side B length 30 mm
side B outer diameter 16 mm
side B thickness 2 mm
transition length 30 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL file ⌀ 69–46 mm (Length: 85 mm) (📦 #2626)

1 object(s) - format STL
Tubing adapter STL file ⌀ 69–46 mm (Length: 85 mm)
Inline tube coupler ⌀69 mm to ⌀46 mm in STL format. Total length of this adapter is 85 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 30 mm, the smaller one of 30 mm as well. The ends are not rounded.
Parameter Value Unit
side A length 30 mm
side A outer diameter 69 mm
side A thickness 2 mm
side B length 30 mm
side B outer diameter 46 mm
side B thickness 2 mm
transition length 25 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 32–15 mm (Length: 50 mm) (📦 #2443)

1 object(s) - format STL
Tube adapter STL file ⌀ 32–15 mm (Length: 50 mm)
Tube fitting ⌀32 mm to ⌀15 mm in STL format. Length of this junction is 50 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 20 mm, the smaller one of 20 mm as well. The ends feature an internal fillet.
Parameter Value Unit
side A length 20 mm
side A outer diameter 32 mm
side A thickness 2 mm
side B length 20 mm
side B outer diameter 15 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 45–15 mm (Length: 90 mm) (📦 #1272)

1 object(s) - format STL
Tube adapter STL file ⌀ 45–15 mm (Length: 90 mm)
Tube coupler ⌀45 mm to ⌀15 mm in STL format. Total length of this sleeve is 90 mm. The larger-diameter tube has a thickness of 2.5 mm and a sleeve length of 30 mm. The smaller-diameter tube has a thickness of 2 mm and a length of 30 mm as well. The ends are raw.
Parameter Value Unit
side A length 30 mm
side A outer diameter 45 mm
side A thickness 2.5 mm
side B length 30 mm
side B outer diameter 15 mm
side B thickness 2 mm
transition length 30 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 45–10 mm (Length: 97 mm) (📦 #1443)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 45–10 mm (Length: 97 mm)
Inline tube junction ⌀45 mm to ⌀10 mm in STL 3D format. Total length of this fitting is 97 mm. The larger-diameter tube has a thickness of 2.5 mm and a sleeve length of 30 mm. The smaller-diameter tube has a thickness of 2 mm and a length of 37 mm. The ends are not rounded.
Parameter Value Unit
side A length 30 mm
side A outer diameter 45 mm
side A thickness 2.5 mm
side B length 37 mm
side B outer diameter 10 mm
side B thickness 2 mm
transition length 30 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 52–45 mm (Length: 75 mm) (📦 #2154)

1 object(s) - format STL
Tube adapter STL file ⌀ 52–45 mm (Length: 75 mm)
Inline fitting ⌀52 mm to ⌀45 mm in STL 3D format. Length of this connector is 75 mm. The thickness of the tubes is identical: 2.5 mm. The larger-diameter tube has a length of 20 mm, the smaller one of 50 mm. The ends have no fillet.
Parameter Value Unit
side A length 20 mm
side A outer diameter 52 mm
side A thickness 2.5 mm
side B length 50 mm
side B outer diameter 45 mm
side B thickness 2.5 mm
transition length 5 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 81–55 mm (Length: 80 mm) (📦 #1440)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 81–55 mm (Length: 80 mm)
Inline sleeve ⌀81 mm to ⌀55 mm in STL 3D format. Final length of this connector is 80 mm. The thickness of the tubes is identical: 2.5 mm. The larger-diameter tube has a sleeve length of 25 mm, the smaller one of 25 mm as well. The ends are rounded on the outside.
Parameter Value Unit
side A length 25 mm
side A outer diameter 81 mm
side A thickness 2.5 mm
side B length 25 mm
side B outer diameter 55 mm
side B thickness 2.5 mm
transition length 30 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL 3D file ⌀ 70–49 mm (Length: 85 mm) (📦 #2632)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 70–49 mm (Length: 85 mm)
Inline tubing adapter ⌀70 mm to ⌀49 mm in STL 3D format. Length of this connector is 85 mm. The thickness of the tubes is identical: 2 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 70 mm
side A thickness 2 mm
side B length 30 mm
side B outer diameter 49 mm
side B thickness 2 mm
transition length 25 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 54–45 mm (Length: 75 mm) (📦 #2338)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 54–45 mm (Length: 75 mm)
Tube fitting ⌀54 mm to ⌀45 mm in STL format. Total length of this reducer is 75 mm. The thickness of the tubes is identical: 2.5 mm. The larger-diameter tube has a length of 20 mm, the smaller one of 50 mm. The ends are raw.
Parameter Value Unit
side A length 20 mm
side A outer diameter 54 mm
side A thickness 2.5 mm
side B length 50 mm
side B outer diameter 45 mm
side B thickness 2.5 mm
transition length 5 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 45–40 mm (Length: 65 mm) (📦 #1942)

1 object(s) - format STL
Tube adapter STL file ⌀ 45–40 mm (Length: 65 mm)
Tube adapter ⌀45 mm to ⌀40 mm in STL format. Total length of this coupler is 65 mm. The thickness of the tubes is identical: 2.5 mm. The larger-diameter tube has a sleeve length of 30 mm, the smaller one of 30 mm as well. The ends have no fillet.
Parameter Value Unit
side A length 30 mm
side A outer diameter 45 mm
side A thickness 2.5 mm
side B length 30 mm
side B outer diameter 40 mm
side B thickness 2.5 mm
transition length 5 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 23–16 mm (Length: 45 mm) (📦 #1835)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 23–16 mm (Length: 45 mm)
Inline tube junction ⌀23 mm to ⌀16 mm in STL format. Final length of this sleeve is 45 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 5 mm, the smaller one of 30 mm. The axes of the tubes are off-center by 2.5 mm. The ends are raw.
Parameter Value Unit
side A length 5 mm
side A outer diameter 23 mm
side A thickness 2 mm
side B length 30 mm
side B outer diameter 16 mm
side B thickness 2 mm
transition length 10 mm
axis offset 2.5 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 45–10 mm (Length: 90 mm) (📦 #1260)

1 object(s) - format STL (4.0/5) 1 vote(s)
Tube adapter STL 3D file ⌀ 45–10 mm (Length: 90 mm)
Inline sleeve ⌀45 mm to ⌀10 mm in STL format. Total length of this connector is 90 mm. The larger-diameter tube has a thickness of 2.5 mm and a length of 30 mm. The smaller-diameter tube has a thickness of 2 mm and a length of 30 mm as well. The ends have no fillet.
Parameter Value Unit
side A length 30 mm
side A outer diameter 45 mm
side A thickness 2.5 mm
side B length 30 mm
side B outer diameter 10 mm
side B thickness 2 mm
transition length 30 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 45–9 mm (Length: 90 mm) (📦 #1271)

1 object(s) - format STL
Tube adapter STL file ⌀ 45–9 mm (Length: 90 mm)
Straight tube connector ⌀45 mm to ⌀9 mm in STL 3D format. Total length of this fitting is 90 mm. The larger-diameter tube has a thickness of 2.5 mm and a length of 30 mm. The smaller-diameter tube has a thickness of 2 mm and a length of 30 mm as well. The ends are not rounded.
Parameter Value Unit
side A length 30 mm
side A outer diameter 45 mm
side A thickness 2.5 mm
side B length 30 mm
side B outer diameter 9 mm
side B thickness 2 mm
transition length 30 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 20–12 mm (Length: 50 mm) (📦 #2410)

1 object(s) - format STL
Tube adapter STL file ⌀ 20–12 mm (Length: 50 mm)
Inline tube coupler ⌀20 mm to ⌀12 mm in STL format. Total length of this coupler is 50 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 20 mm, the smaller one of 20 mm as well. The ends have no fillet.
Parameter Value Unit
side A length 20 mm
side A outer diameter 20 mm
side A thickness 2 mm
side B length 20 mm
side B outer diameter 12 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 55–50 mm (Length: 75 mm) (📦 #2339)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 55–50 mm (Length: 75 mm)
Straight tube coupler ⌀55 mm to ⌀50 mm in STL 3D format. Final length of this sleeve is 75 mm. The thickness of the tubes is identical: 2.5 mm. The larger-diameter tube has a length of 20 mm, the smaller one of 50 mm. The ends are raw.
Parameter Value Unit
side A length 20 mm
side A outer diameter 55 mm
side A thickness 2.5 mm
side B length 50 mm
side B outer diameter 50 mm
side B thickness 2.5 mm
transition length 5 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 14–13 mm (Length: 70 mm) (📦 #2052)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 14–13 mm (Length: 70 mm)
Inline tube adapter ⌀14 mm to ⌀13 mm in STL 3D format. Length of this coupler is 70 mm. The larger-diameter tube has a thickness of 2.1 mm and a sleeve length of 30 mm. The smaller-diameter tube has a thickness of 2 mm and a length of 20 mm. The ends are not rounded.
Parameter Value Unit
side A length 30 mm
side A outer diameter 14 mm
side A thickness 2.1 mm
side B length 20 mm
side B outer diameter 13 mm
side B thickness 2 mm
transition length 20 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 70–69 mm (Length: 50 mm) (📦 #1394)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 70–69 mm (Length: 50 mm)
Diameter adapter ⌀70 mm to ⌀69 mm in STL 3D format. Length of this sleeve is 50 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 20 mm, the smaller one of 20 mm as well. The ends have a fillet on the outside to facilitate the connection of the two tubes.
Parameter Value Unit
side A length 20 mm
side A outer diameter 70 mm
side A thickness 2 mm
side B length 20 mm
side B outer diameter 69 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL 3D file ⌀ 33–26 mm (Length: 50 mm) (📦 #1526)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 33–26 mm (Length: 50 mm)
Straight tube adapter ⌀33 mm to ⌀26 mm in STL 3D format. Final length of this fitting is 50 mm. The larger-diameter tube has a thickness of 2.8 mm and a sleeve length of 15 mm. The smaller-diameter tube has a thickness of 2 mm and a length of 20 mm. The ends are not rounded.
Parameter Value Unit
side A length 15 mm
side A outer diameter 33 mm
side A thickness 2.8 mm
side B length 20 mm
side B outer diameter 26 mm
side B thickness 2 mm
transition length 15 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 69–65 mm (Length: 100 mm) (📦 #1393)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 69–65 mm (Length: 100 mm)
Inline tube coupler ⌀69 mm to ⌀65 mm in STL format. Final length of this fitting is 100 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 40 mm, the smaller one of 50 mm. The ends feature an external fillet to make tube connection easier.
Parameter Value Unit
side A length 40 mm
side A outer diameter 69 mm
side A thickness 2 mm
side B length 50 mm
side B outer diameter 65 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 76–50 mm (Length: 60 mm) (📦 #1358)

1 object(s) - format STL (5.0/5) 1 vote(s)
Tube adapter STL file ⌀ 76–50 mm (Length: 60 mm)
Straight tube fitting ⌀76 mm to ⌀50 mm in STL 3D format. Length of this fitting is 60 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 20 mm, the smaller one of 20 mm as well. The ends feature an internal fillet.
Parameter Value Unit
side A length 20 mm
side A outer diameter 76 mm
side A thickness 2 mm
side B length 20 mm
side B outer diameter 50 mm
side B thickness 2 mm
transition length 20 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 40–16 mm (Length: 85 mm) (📦 #2463)

1 object(s) - format STL
Tube adapter STL file ⌀ 40–16 mm (Length: 85 mm)
Tube adapter ⌀40 mm to ⌀16 mm in STL format. Final length of this adapter is 85 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 40 mm, the smaller one of 20 mm. The ends are raw.
Parameter Value Unit
side A length 40 mm
side A outer diameter 40 mm
side A thickness 2 mm
side B length 20 mm
side B outer diameter 16 mm
side B thickness 2 mm
transition length 25 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 70–62 mm (Length: 100 mm) (📦 #2254)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 70–62 mm (Length: 100 mm)
Straight tube adapter ⌀70 mm to ⌀62 mm in STL format. Length of this adapter is 100 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 30 mm, the smaller one of 50 mm. The ends are raw.
Parameter Value Unit
side A length 30 mm
side A outer diameter 70 mm
side A thickness 2 mm
side B length 50 mm
side B outer diameter 62 mm
side B thickness 2 mm
transition length 20 mm
axis offset 0 mm
ends fillet no fillet