Inline tube adapter
Number of 3D models generated: 55
Category: technical parts
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(model #1166)
Photos of some models once 3D printed
This template generates tube adapters, with one inlet and one outlet (each of which can be considered either male or female).
Both tube ends are customizable. It is possible to offset the two connectors. Likewise, each end can feature a thread on the outside, inside, both, or none.
Internal fillets are always integrated into the adapter to optimize the flow through the transition zone.
Note that a clearance is always required: a tube with an outer diameter of 50 mm will not fit into a tube with an inner diameter of 50 mm (even more so with 3D printing).
Find more information about this template in the article A new template for inline tube adapters!.
Keywords: tube adapter, fitting, reducer, connector, coupling, sleeve, straight adapter, diameter adapter, pipe adapter, tube junction, inline fitting
Parameters and Search
Additional information
The transition refers to the connection interface between the two tubes. It defines the total length of the adapter, which is equal to the sum of the tube lengths plus the length of the transition.
Details for parameter #9 ends fillet:
- 0: no fillet
- 1: fillet on the outside
- 2: fillet on the inside
- 3: fillet on both inside and outside
-
2025-07-19 (last model before revision: #1215) :
#1 side A length : decimal places has been updated to integer
#2 side A diameter : decimal places has been updated to integer
#4 side B length : decimal places has been updated to integer
#5 side B diameter : decimal places has been updated to integer
#7 transition length : decimal places has been updated to integer
Illustration of the parameters
Latest models generated using this template
Tube reducer ⌀51 mm to ⌀35 mm in STL format. Final length of this adapter is 80 mm. The thickness of the tubes is identical: 3 mm. The ends have a fillet to ease the connection.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 30 | mm |
| side A outer diameter | 51 | mm |
| side A thickness | 3 | mm |
| side B length | 30 | mm |
| side B outer diameter | 35 | mm |
| side B thickness | 3 | mm |
| transition length | 20 | mm |
| axis offset | 0 | mm |
| ends fillet | 3 | 0,1,2,3 |
Diameter adapter ⌀51 mm to ⌀35 mm in STL format. Length of this coupler is 75 mm. The thickness of the larger diameter tube is 6 mm, and the smaller one is 3 mm. The ends are rounded to make tube connection easier.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 30 | mm |
| side A outer diameter | 51 | mm |
| side A thickness | 6 | mm |
| side B length | 30 | mm |
| side B outer diameter | 35 | mm |
| side B thickness | 3 | mm |
| transition length | 15 | mm |
| axis offset | 0 | mm |
| ends fillet | 3 | 0,1,2,3 |
📦 3D model #1288
1 object(s) - format STL (5.0/5) 2 vote(s)
Straight tube adapter ⌀149 mm to ⌀100 mm in STL format. Final length of this junction is 200 mm. The thickness of the tubes is identical: 2 mm. The ends have a fillet on the outside to facilitate the connection of the two tubes.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 50 | mm |
| side A outer diameter | 149 | mm |
| side A thickness | 2 | mm |
| side B length | 100 | mm |
| side B outer diameter | 100 | mm |
| side B thickness | 2 | mm |
| transition length | 50 | mm |
| axis offset | 0 | mm |
| ends fillet | 1 | 0,1,2,3 |
Inline sleeve ⌀45 mm to ⌀15 mm in STL format. Length of this junction is 90 mm. The thickness of the larger diameter tube is 2.5 mm, and the smaller one is 2 mm. 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 | 0 | 0,1,2,3 |
Tube reducer ⌀45 mm to ⌀9 mm in STL format. Final length of this coupler is 90 mm. The thickness of the larger diameter tube is 2.5 mm, and the smaller one is 2 mm. 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 | 9 | mm |
| side B thickness | 2 | mm |
| transition length | 30 | mm |
| axis offset | 0 | mm |
| ends fillet | 0 | 0,1,2,3 |
Tube connector ⌀44 mm to ⌀16 mm in STL format. Length of this connector is 90 mm. The thickness of the larger diameter tube is 2.5 mm, and the smaller one is 2 mm. The ends have no fillet.
| 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 | 0 | 0,1,2,3 |
Tube connector ⌀38 mm to ⌀10 mm in STL format. Final length of this fitting is 90 mm. The thickness of the larger diameter tube is 2.5 mm, and the smaller one is 2 mm. The ends are rounded on the outside.
| 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 | 1 | 0,1,2,3 |
Inline tube adapter ⌀80 mm to ⌀70 mm in STL format. Final length of this reducer is 65 mm. The thickness of the tubes is identical: 4 mm. The ends are not rounded.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 30 | mm |
| side A outer diameter | 80 | mm |
| side A thickness | 4 | mm |
| side B length | 25 | mm |
| side B outer diameter | 70 | mm |
| side B thickness | 4 | mm |
| transition length | 10 | mm |
| axis offset | 0 | mm |
| ends fillet | 0 | 0,1,2,3 |
Inline tube junction ⌀20 mm to ⌀5 mm in STL format. Total length of this coupler is 65 mm. The thickness of the tubes is identical: 2 mm. The ends feature an external fillet to ease the connection.
| 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 | 1 | 0,1,2,3 |
Inline sleeve ⌀45 mm to ⌀10 mm in STL format. Final length of this junction is 90 mm. The thickness of the larger diameter tube is 2.5 mm, and the smaller one is 2 mm. 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 | 0 | 0,1,2,3 |
Straight tube reducer ⌀110 mm to ⌀106 mm in STL format. Total length of this sleeve is 35 mm. The thickness of the tubes is identical: 3 mm. The ends are raw.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 20 | mm |
| side A outer diameter | 110 | mm |
| side A thickness | 3 | mm |
| side B length | 10 | mm |
| side B outer diameter | 106 | mm |
| side B thickness | 3 | mm |
| transition length | 5 | mm |
| axis offset | 0 | mm |
| ends fillet | 0 | 0,1,2,3 |
Tube adapter ⌀75 mm to ⌀50 mm in STL format. Length of this sleeve is 100 mm. The thickness of the tubes is identical: 2 mm. The axes of the tubes are off-center. The ends are not rounded.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 20 | mm |
| side A outer diameter | 75 | mm |
| side A thickness | 2 | mm |
| side B length | 20 | mm |
| side B outer diameter | 50 | mm |
| side B thickness | 2 | mm |
| transition length | 60 | mm |
| axis offset | 12.4 | mm |
| ends fillet | 0 | 0,1,2,3 |
Straight tube connector ⌀147 mm to ⌀75 mm in STL format. Length of this reducer is 180 mm. The thickness of the tubes is identical: 2 mm. The two axes of the tubes are offset. The ends are not rounded.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 20 | mm |
| side A outer diameter | 147 | mm |
| side A thickness | 2 | mm |
| side B length | 40 | mm |
| side B outer diameter | 75 | mm |
| side B thickness | 2 | mm |
| transition length | 120 | mm |
| axis offset | 35.9 | mm |
| ends fillet | 0 | 0,1,2,3 |
Tube coupler ⌀60 mm to ⌀45 mm in STL format. Final length of this adapter is 75 mm. The thickness of the tubes is identical: 3 mm. The ends are not rounded.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 30 | mm |
| side A outer diameter | 60 | mm |
| side A thickness | 3 | mm |
| side B length | 30 | mm |
| side B outer diameter | 45 | mm |
| side B thickness | 3 | mm |
| transition length | 15 | mm |
| axis offset | 0 | mm |
| ends fillet | 0 | 0,1,2,3 |
Inline tube adapter ⌀68 mm to ⌀53 mm in STL format. Final length of this reducer is 65 mm. The thickness of the tubes is identical: 4 mm. The ends have no fillet.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 25 | mm |
| side A outer diameter | 68 | mm |
| side A thickness | 4 | mm |
| side B length | 25 | mm |
| side B outer diameter | 53 | mm |
| side B thickness | 4 | mm |
| transition length | 15 | mm |
| axis offset | 0 | mm |
| ends fillet | 0 | 0,1,2,3 |
Tube reducer ⌀68 mm to ⌀53 mm in STL format. Total length of this adapter is 65 mm. The thickness of the larger diameter tube is 2 mm, and the smaller one is 4 mm. The ends are not rounded.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 25 | mm |
| side A outer diameter | 68 | mm |
| side A thickness | 2 | mm |
| side B length | 25 | mm |
| side B outer diameter | 53 | mm |
| side B thickness | 4 | mm |
| transition length | 15 | mm |
| axis offset | 0 | mm |
| ends fillet | 0 | 0,1,2,3 |
Tube adapter ⌀68 mm to ⌀52 mm in STL format. Length of this coupler is 65 mm. The thickness of the tubes is identical: 4 mm. The ends are not rounded.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 25 | mm |
| side A outer diameter | 68 | mm |
| side A thickness | 4 | mm |
| side B length | 25 | mm |
| side B outer diameter | 52 | mm |
| side B thickness | 4 | mm |
| transition length | 15 | mm |
| axis offset | 0 | mm |
| ends fillet | 0 | 0,1,2,3 |
Inline tube adapter ⌀64 mm to ⌀49 mm in STL format. Final length of this coupler is 65 mm. The thickness of the larger diameter tube is 4 mm, and the smaller one is 3 mm. The ends are raw.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 25 | mm |
| side A outer diameter | 64 | mm |
| side A thickness | 4 | mm |
| side B length | 25 | mm |
| side B outer diameter | 49 | mm |
| side B thickness | 3 | mm |
| transition length | 15 | mm |
| axis offset | 0 | mm |
| ends fillet | 0 | 0,1,2,3 |
Tube reducer ⌀64 mm to ⌀49 mm in STL format. Final length of this fitting is 63 mm. The thickness of the tubes is identical: 4 mm. The ends are not rounded.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 25 | mm |
| side A outer diameter | 64 | mm |
| side A thickness | 4 | mm |
| side B length | 25 | mm |
| side B outer diameter | 49 | mm |
| side B thickness | 4 | mm |
| transition length | 13 | mm |
| axis offset | 0 | mm |
| ends fillet | 0 | 0,1,2,3 |
Straight tube coupler ⌀60 mm to ⌀45 mm in STL format. Total length of this connector is 100 mm. The thickness of the tubes is identical: 4 mm. The ends have no fillet.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 50 | mm |
| side A outer diameter | 60 | mm |
| side A thickness | 4 | mm |
| side B length | 30 | mm |
| side B outer diameter | 45 | mm |
| side B thickness | 4 | mm |
| transition length | 20 | mm |
| axis offset | 0 | mm |
| ends fillet | 0 | 0,1,2,3 |
Tube junction ⌀80 mm to ⌀75 mm in STL format. Final length of this adapter is 100 mm. The thickness of the tubes is identical: 2.5 mm. The axes of the tubes are offset. The ends are rounded on the outside to ease the connection.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 45 | mm |
| side A outer diameter | 80 | mm |
| side A thickness | 2.5 | mm |
| side B length | 45 | mm |
| side B outer diameter | 75 | mm |
| side B thickness | 2.5 | mm |
| transition length | 10 | mm |
| axis offset | 2.4 | mm |
| ends fillet | 1 | 0,1,2,3 |
Diameter adapter ⌀80 mm to ⌀75 mm in STL format. Final length of this adapter is 101 mm. The thickness of the tubes is identical: 2.5 mm. The axes of the tubes are offset. The ends are rounded on the outside to facilitate the connection of the two tubes.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 46 | mm |
| side A outer diameter | 80 | mm |
| side A thickness | 2.5 | mm |
| side B length | 45 | mm |
| side B outer diameter | 75 | mm |
| side B thickness | 2.5 | mm |
| transition length | 10 | mm |
| axis offset | 2.4 | mm |
| ends fillet | 1 | 0,1,2,3 |
Inline fitting ⌀80 mm to ⌀75 mm in STL format. Total length of this sleeve is 111 mm. The thickness of the tubes is identical: 2.5 mm. The axes of the tubes are offset. The ends have a fillet on the outside.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 46 | mm |
| side A outer diameter | 80 | mm |
| side A thickness | 2.5 | mm |
| side B length | 45 | mm |
| side B outer diameter | 75 | mm |
| side B thickness | 2.5 | mm |
| transition length | 20 | mm |
| axis offset | 2.4 | mm |
| ends fillet | 1 | 0,1,2,3 |
Straight tube fitting ⌀140 mm to ⌀100 mm in STL format. Total length of this sleeve is 80 mm. The thickness of the tubes is identical: 3 mm. The two axes of the tubes are offset. The ends are raw.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 20 | mm |
| side A outer diameter | 140 | mm |
| side A thickness | 3 | mm |
| side B length | 30 | mm |
| side B outer diameter | 100 | mm |
| side B thickness | 3 | mm |
| transition length | 30 | mm |
| axis offset | 19.9 | mm |
| ends fillet | 0 | 0,1,2,3 |
Inline tube junction ⌀86 mm to ⌀81 mm in STL format. Final length of this adapter is 111 mm. The thickness of the tubes is identical: 3 mm. The ends are rounded on the outside to ease the connection.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 46 | mm |
| side A outer diameter | 86 | mm |
| side A thickness | 3 | mm |
| side B length | 45 | mm |
| side B outer diameter | 81 | mm |
| side B thickness | 3 | mm |
| transition length | 20 | mm |
| axis offset | 0 | mm |
| ends fillet | 1 | 0,1,2,3 |
Tube connector ⌀80 mm to ⌀75 mm in STL format. Final length of this adapter is 111 mm. The thickness of the tubes is identical: 3 mm. The ends are rounded on the outside to make tube connection easier.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 46 | mm |
| side A outer diameter | 80 | mm |
| side A thickness | 3 | mm |
| side B length | 45 | mm |
| side B outer diameter | 75 | mm |
| side B thickness | 3 | mm |
| transition length | 20 | mm |
| axis offset | 0 | mm |
| ends fillet | 1 | 0,1,2,3 |
Inline tube reducer ⌀80 mm to ⌀75 mm in STL format. Final length of this reducer is 115 mm. The thickness of the tubes is identical: 2 mm. The axes of the tubes are off-center. The ends are raw.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 50 | mm |
| side A outer diameter | 80 | mm |
| side A thickness | 2 | mm |
| side B length | 50 | mm |
| side B outer diameter | 75 | mm |
| side B thickness | 2 | mm |
| transition length | 15 | mm |
| axis offset | 2.4 | mm |
| ends fillet | 0 | 0,1,2,3 |
Tube reducer ⌀140 mm to ⌀120 mm in STL format. Final length of this coupler is 60 mm. The thickness of the tubes is identical: 4 mm. The ends have no fillet.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 20 | mm |
| side A outer diameter | 140 | mm |
| side A thickness | 4 | mm |
| side B length | 20 | mm |
| side B outer diameter | 120 | mm |
| side B thickness | 4 | mm |
| transition length | 20 | mm |
| axis offset | 0 | mm |
| ends fillet | 0 | 0,1,2,3 |
Inline tube coupler ⌀90 mm to ⌀68 mm in STL format. Length of this junction is 90 mm. The thickness of the tubes is identical: 2 mm. The axes of the tubes are offset. The ends are raw.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 15 | mm |
| side A outer diameter | 90 | mm |
| side A thickness | 2 | mm |
| side B length | 30 | mm |
| side B outer diameter | 68 | mm |
| side B thickness | 2 | mm |
| transition length | 45 | mm |
| axis offset | 10 | mm |
| ends fillet | 0 | 0,1,2,3 |
Diameter adapter ⌀80 mm to ⌀70 mm in STL format. Final length of this sleeve is 80 mm. The thickness of the tubes is identical: 3 mm. The axes of the tubes are offset. The ends are not rounded.
| Parameter | Value | Unit |
|---|---|---|
| side A length | 30 | mm |
| side A outer diameter | 80 | mm |
| side A thickness | 3 | mm |
| side B length | 30 | mm |
| side B outer diameter | 70 | mm |
| side B thickness | 3 | mm |
| transition length | 20 | mm |
| axis offset | 4.9 | mm |
| ends fillet | 0 | 0,1,2,3 |