Custom Tube adapter STL 3D file ⌀ 71–38 mm (Length: 50 mm) 📦#12067

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Inline tubing adapter ⌀71 mm to ⌀38 mm in STL 3D format. Final length of this junction is 50 mm. The thickness of the tubes is identical: 3.5 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.
Generation date: 2026-09-26
3D Model Tube adapter STL 3D file ⌀ 71–38 mm (Length: 50 mm)

3D model download

Free
  • inline-tube-adapter-lenA20mm-d_model12067-nb0_dd{id}.stl : 8.6 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 (≃0.79 in)
#2 side A outer diameter 71 mm (≃2.80 in)
#3 side A thickness 3.5 mm (≃1/8 in)
#4 side B length 20 mm (≃0.79 in)
#5 side B outer diameter 38 mm (≃1 1/2 in)
#6 side B thickness 3.5 mm (≃1/8 in)
#7 transition length 10 mm (≃0.39 in)
#8 axis offset 0 mm (0 in)
#9 ends fillet fillet on the inside
Metadata Value
inner diameter (side A) 64 mm (≃2.52 in)
inner diameter (side B) 31 mm (≃1.22 in)
total length 50 mm (≃1.97 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

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

Tube adapter STL 3D file ⌀ 52–45 mm (Length: 38 mm) (📦 #12024)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 52–45 mm (Length: 38 mm)
Inline tubing adapter ⌀52 mm to ⌀45 mm in STL 3D format. Total length of this sleeve is 38 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 20 mm, the smaller one of 13 mm. The ends have a fillet on the inside.
Parameter Value Unit
side A length 20 mm
side A outer diameter 52 mm
side A thickness 3 mm
side B length 13 mm
side B outer diameter 45 mm
side B thickness 3 mm
transition length 5 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL 3D file ⌀ 63–46 mm (Length: 68 mm) (📦 #4957)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 63–46 mm (Length: 68 mm)
Inline tube reducer ⌀63 mm to ⌀46 mm in STL format. Final length of this fitting is 68 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 30 mm, the smaller one of 18 mm. The ends have a fillet on the inside to facilitate the connection of the two tubes.
Parameter Value Unit
side A length 30 mm
side A outer diameter 63 mm
side A thickness 3 mm
side B length 18 mm
side B outer diameter 46 mm
side B thickness 3 mm
transition length 20 mm
axis offset 0 mm
ends fillet fillet on th...

Tubing adapter STL file ⌀ 52–24 mm (Length: 40 mm) (📦 #7384)

1 object(s) - format STL
Tubing adapter STL file ⌀ 52–24 mm (Length: 40 mm)
Straight tubing adapter ⌀52 mm to ⌀24 mm in STL 3D format. Total length of this fitting is 40 mm. The thickness of the tubes is identical: 4 mm. The larger-diameter tube has a sleeve length of 20 mm, the smaller one of 10 mm. 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 52 mm
side A thickness 4 mm
side B length 10 mm
side B outer diameter 24 mm
side B thickness 4 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on th...

Tubing adapter STL 3D file ⌀ 64–32 mm (Length: 80 mm) (📦 #2791)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 64–32 mm (Length: 80 mm)
Inline tubing adapter ⌀64 mm to ⌀32 mm in STL 3D format. Total length of this reducer 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 have a fillet on the inside to ease the connection.
Parameter Value Unit
side A length 30 mm
side A outer diameter 64 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 fillet on th...

Tubing adapter STL file ⌀ 57–51 mm (Length: 30 mm) (📦 #3335)

1 object(s) - format STL
Tubing adapter STL file ⌀ 57–51 mm (Length: 30 mm)
Inline tube adapter ⌀57 mm to ⌀51 mm in STL 3D format. Final length of this reducer is 30 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 10 mm, the smaller one of 10 mm as well. The ends have a fillet on the inside to facilitate the connection of the two tubes.
Parameter Value Unit
side A length 10 mm
side A outer diameter 57 mm
side A thickness 3 mm
side B length 10 mm
side B outer diameter 51 mm
side B thickness 3 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 98–50 mm (Length: 72 mm) (📦 #7245)

1 object(s) - format STL
Tube adapter STL file ⌀ 98–50 mm (Length: 72 mm)
Straight sleeve ⌀98 mm to ⌀50 mm in STL format. Final length of this adapter is 72 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 30 mm. The ends are rounded on the inside.
Parameter Value Unit
side A length 32 mm
side A outer diameter 98 mm
side A thickness 3 mm
side B length 30 mm
side B outer diameter 50 mm
side B thickness 3 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 40–35 mm (Length: 79 mm) (📦 #5081)

1 object(s) - format STL
Tube adapter STL file ⌀ 40–35 mm (Length: 79 mm)
Inline tubing adapter ⌀40 mm to ⌀35 mm in STL 3D format. Final length of this junction is 79 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 29 mm. The ends are rounded on the inside to make tube connection easier.
Parameter Value Unit
side A length 30 mm
side A outer diameter 40 mm
side A thickness 3 mm
side B length 29 mm
side B outer diameter 35 mm
side B thickness 3 mm
transition length 20 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL 3D file ⌀ 63–43 mm (Length: 78 mm) (📦 #4948)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 63–43 mm (Length: 78 mm)
Tube adapter ⌀63 mm to ⌀43 mm in STL 3D format. Final length of this fitting is 78 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 40 mm, the smaller one of 18 mm. The ends have a fillet on the inside to make tube connection easier.
Parameter Value Unit
side A length 40 mm
side A outer diameter 63 mm
side A thickness 3 mm
side B length 18 mm
side B outer diameter 43 mm
side B thickness 3 mm
transition length 20 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 32–15 mm (Length: 50 mm) (📦 #2441)

1 object(s) - format STL
Tube adapter STL file ⌀ 32–15 mm (Length: 50 mm)
Inline tube reducer ⌀32 mm to ⌀15 mm in STL format. Length of this adapter is 50 mm. The thickness of the tubes is identical: 3.5 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 3.5 mm
side B length 20 mm
side B outer diameter 15 mm
side B thickness 3.5 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on th...

Tubing adapter STL file ⌀ 50–20 mm (Length: 80 mm) (📦 #8575)

1 object(s) - format STL
Tubing adapter STL file ⌀ 50–20 mm (Length: 80 mm)
Tube reducer ⌀50 mm to ⌀20 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 feature an internal fillet.
Parameter Value Unit
side A length 30 mm
side A outer diameter 50 mm
side A thickness 3 mm
side B length 30 mm
side B outer diameter 20 mm
side B thickness 3 mm
transition length 20 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL 3D file ⌀ 102–50 mm (Length: 72 mm) (📦 #7247)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 102–50 mm (Length: 72 mm)
Inline tube adapter ⌀102 mm to ⌀50 mm in STL format. Length of this fitting is 72 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 32 mm, the smaller one of 30 mm. The ends feature an internal fillet to ease the connection.
Parameter Value Unit
side A length 32 mm
side A outer diameter 102 mm
side A thickness 3 mm
side B length 30 mm
side B outer diameter 50 mm
side B thickness 3 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL 3D file ⌀ 67–43 mm (Length: 89 mm) (📦 #5241)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 67–43 mm (Length: 89 mm)
Tube adapter ⌀67 mm to ⌀43 mm in STL 3D format. Length of this junction is 89 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 rounded on the inside to facilitate the connection of the two tubes.
Parameter Value Unit
side A length 30 mm
side A outer diameter 67 mm
side A thickness 3 mm
side B length 30 mm
side B outer diameter 43 mm
side B thickness 3 mm
transition length 29 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 67–33 mm (Length: 89 mm) (📦 #5243)

1 object(s) - format STL
Tube adapter STL file ⌀ 67–33 mm (Length: 89 mm)
Straight tube adapter ⌀67 mm to ⌀33 mm in STL 3D format. Final length of this sleeve is 89 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 have a fillet on the inside to make tube connection easier.
Parameter Value Unit
side A length 30 mm
side A outer diameter 67 mm
side A thickness 3 mm
side B length 30 mm
side B outer diameter 33 mm
side B thickness 3 mm
transition length 29 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 82–63 mm (Length: 75 mm) (📦 #2117)

1 object(s) - format STL
Tube adapter STL file ⌀ 82–63 mm (Length: 75 mm)
Straight sleeve ⌀82 mm to ⌀63 mm in STL format. Length of this junction is 75 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 25 mm, the smaller one of 25 mm as well. The ends have a fillet on the inside.
Parameter Value Unit
side A length 25 mm
side A outer diameter 82 mm
side A thickness 3 mm
side B length 25 mm
side B outer diameter 63 mm
side B thickness 3 mm
transition length 25 mm
axis offset 0 mm
ends fillet fillet on th...

Tubing adapter STL 3D file ⌀ 74–50 mm (Length: 50 mm) (📦 #5401)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 74–50 mm (Length: 50 mm)
Tubing adapter ⌀74 mm to ⌀50 mm in STL 3D format. Final length of this junction is 50 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 20 mm, the smaller one of 20 mm as well. The ends are rounded to ease the connection.
Parameter Value Unit
side A length 20 mm
side A outer diameter 74 mm
side A thickness 3 mm
side B length 20 mm
side B outer diameter 50 mm
side B thickness 3 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on bo...

Tube adapter STL 3D file ⌀ 55–34 mm (Length: 55 mm) (📦 #11985)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 55–34 mm (Length: 55 mm)
Tube adapter ⌀55 mm to ⌀34 mm in STL format. Final length of this junction is 55 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 20 mm, the smaller one of 20 mm as well. The ends are rounded to facilitate the connection of the two tubes.
Parameter Value Unit
side A length 20 mm
side A outer diameter 55 mm
side A thickness 3 mm
side B length 20 mm
side B outer diameter 34 mm
side B thickness 3 mm
transition length 15 mm
axis offset 0 mm
ends fillet fillet on bo...

Tube adapter STL file ⌀ 44–35 mm (Length: 88 mm) (📦 #5253)

1 object(s) - format STL
Tube adapter STL file ⌀ 44–35 mm (Length: 88 mm)
Inline sleeve ⌀44 mm to ⌀35 mm in STL 3D format. Length of this sleeve is 88 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 29 mm. The ends have a fillet on the inside.
Parameter Value Unit
side A length 30 mm
side A outer diameter 44 mm
side A thickness 3 mm
side B length 29 mm
side B outer diameter 35 mm
side B thickness 3 mm
transition length 29 mm
axis offset 0 mm
ends fillet fillet on th...

Tubing adapter STL file ⌀ 81–51 mm (Length: 50 mm) (📦 #5408)

1 object(s) - format STL
Tubing adapter STL file ⌀ 81–51 mm (Length: 50 mm)
Tubing adapter ⌀81 mm to ⌀51 mm in STL format. Length of this reducer is 50 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 20 mm, the smaller one of 20 mm as well. The ends have a fillet.
Parameter Value Unit
side A length 20 mm
side A outer diameter 81 mm
side A thickness 3 mm
side B length 20 mm
side B outer diameter 51 mm
side B thickness 3 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on bo...

Tube adapter STL file ⌀ 36–19 mm (Length: 26 mm) (📦 #2451)

1 object(s) - format STL (5.0/5) 1 vote(s)
Tube adapter STL file ⌀ 36–19 mm (Length: 26 mm)
Tube connector ⌀36 mm to ⌀19 mm in STL 3D format. Length of this adapter is 26 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 10 mm, the smaller one of 8 mm. The ends are rounded on the inside to facilitate the connection of the two tubes.
Parameter Value Unit
side A length 10 mm
side A outer diameter 36 mm
side A thickness 3 mm
side B length 8 mm
side B outer diameter 19 mm
side B thickness 3 mm
transition length 8 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 77–53 mm (Length: 50 mm) (📦 #5407)

1 object(s) - format STL
Tube adapter STL file ⌀ 77–53 mm (Length: 50 mm)
Inline tube adapter ⌀77 mm to ⌀53 mm in STL 3D format. Final length of this adapter is 50 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 20 mm, the smaller one of 20 mm as well. The ends are rounded to facilitate the connection of the two tubes.
Parameter Value Unit
side A length 20 mm
side A outer diameter 77 mm
side A thickness 3 mm
side B length 20 mm
side B outer diameter 53 mm
side B thickness 3 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on bo...

Tube adapter STL 3D file ⌀ 55–35 mm (Length: 50 mm) (📦 #3882)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 55–35 mm (Length: 50 mm)
Straight sleeve ⌀55 mm to ⌀35 mm in STL format. Final length of this sleeve is 50 mm. The larger-diameter tube has a thickness of 4 mm and a sleeve length of 25 mm. The smaller-diameter tube has a thickness of 3 mm and a length of 20 mm. The ends are rounded on the outside to make tube connection easier.
Parameter Value Unit
side A length 25 mm
side A outer diameter 55 mm
side A thickness 4 mm
side B length 20 mm
side B outer diameter 35 mm
side B thickness 3 mm
transition length 5 mm
axis offset 0 mm
ends fillet fillet on th...

Tubing adapter STL file ⌀ 55–46 mm (Length: 55 mm) (📦 #11989)

1 object(s) - format STL
Tubing adapter STL file ⌀ 55–46 mm (Length: 55 mm)
Straight tube fitting ⌀55 mm to ⌀46 mm in STL 3D format. Length of this adapter is 55 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 20 mm, the smaller one of 20 mm as well. The ends are rounded to facilitate the connection of the two tubes.
Parameter Value Unit
side A length 20 mm
side A outer diameter 55 mm
side A thickness 3 mm
side B length 20 mm
side B outer diameter 46 mm
side B thickness 3 mm
transition length 15 mm
axis offset 0 mm
ends fillet fillet on bo...

Tubing adapter STL 3D file ⌀ 62–51 mm (Length: 45 mm) (📦 #7928)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 62–51 mm (Length: 45 mm)
Inline tube adapter ⌀62 mm to ⌀51 mm in STL format. Total length of this sleeve is 45 mm. The larger-diameter tube has a thickness of 4 mm and a sleeve length of 20 mm. The smaller-diameter tube has a thickness of 3 mm and a length of 20 mm as well. The axes of the tubes are off-center by 0.1 mm. The ends are rounded on the outside.
Parameter Value Unit
side A length 20 mm
side A outer diameter 62 mm
side A thickness 4 mm
side B length 20 mm
side B outer diameter 51 mm
side B thickness 3 mm
transition length 5 mm
axis offset 0.1 mm
ends fillet fillet on th...

Tubing adapter STL 3D file ⌀ 43–33 mm (Length: 88 mm) (📦 #5244)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 43–33 mm (Length: 88 mm)
Straight tube coupler ⌀43 mm to ⌀33 mm in STL format. Total length of this reducer is 88 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 30 mm, the smaller one of 29 mm. The ends feature an internal fillet to facilitate the connection of the two tubes.
Parameter Value Unit
side A length 30 mm
side A outer diameter 43 mm
side A thickness 3 mm
side B length 29 mm
side B outer diameter 33 mm
side B thickness 3 mm
transition length 29 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 50–40 mm (Length: 45 mm) (📦 #1094)

1 object(s) - format STL (5.0/5) 4 vote(s)
Tube adapter STL file ⌀ 50–40 mm (Length: 45 mm)
Straight tube reducer ⌀50 mm to ⌀40 mm in STL 3D format. Total length of this reducer is 45 mm. The larger-diameter tube has a thickness of 4 mm and a sleeve length of 20 mm. The smaller-diameter tube has a thickness of 3 mm and a length of 20 mm as well. The ends are rounded on the outside to ease the connection.
Parameter Value Unit
side A length 20 mm
side A outer diameter 50 mm
side A thickness 4 mm
side B length 20 mm
side B outer diameter 40 mm
side B thickness 3 mm
transition length 5 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL 3D file ⌀ 35–18 mm (Length: 26 mm) (📦 #2450)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 35–18 mm (Length: 26 mm)
Inline tube reducer ⌀35 mm to ⌀18 mm in STL 3D format. Final length of this fitting is 26 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 10 mm, the smaller one of 8 mm. The ends are rounded on the inside to ease the connection.
Parameter Value Unit
side A length 10 mm
side A outer diameter 35 mm
side A thickness 3 mm
side B length 8 mm
side B outer diameter 18 mm
side B thickness 3 mm
transition length 8 mm
axis offset 0 mm
ends fillet fillet on th...