Custom Round-to-Rectangular Tube Adapter STL file ⌀20 mm to 97.5×22 mm, thickness 3 mm 📦#6982

STL Download STL 1
Create a new model expert
from scratch search for a model
Download this file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀20 mm and a rectangular section with inner dimensions 97.5×22 mm. The shell thickness is 3 mm and the total length is 136 mm.
Generation date: 2026-01-31
3D Model Round-to-Rectangular Tube Adapter STL file ⌀20 mm to 97.5×22 mm, thickness 3 mm

3D model download

Free
  • round-to-rectangular-adapter-d_model6982-nb0_dd{id}.stl : 1.1 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)
Safe download
Instant .zip download — no email, no account

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 20 mm (≃0.79 in)
#2 cylinder inlet length 5 mm (≃3/16 in)
#3 rectangle internal length 97.5 mm (≃3.84 in)
#4 rectangle internal height 22 mm (≃7/8 in)
#5 rectangle inlet length 7 mm (≃0.28 in)
#6 offset Z 0 mm (0 in)
#7 offset Y 0 mm (0 in)
#8 total length 136 mm (≃5.35 in)
#9 thickness 3 mm (≃1/8 in)
#10 chamfer no chamfer
Metadata Value
Cylinder internal diameter 14 mm (≃9/16 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

Related 3D models

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 file ⌀29 mm to 100×50 mm, thickness 2 mm (📦 #4305)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀29 mm to 100×50 mm, thickness 2 mm
Model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀29 mm and a rectangular section with internal dimensions 100×50 mm. The wall thickness is 2 mm and the overall length is 100 mm.
Parameter Value Unit
cylinder outer diameter 29 mm
cylinder inlet length 7 mm
rectangle internal length 100 mm
rectangle internal height 50 mm
rectangle inlet length 10 mm
offset Z 0 mm
offset Y 0 mm
total length 100 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀40 mm to 100×100 mm, thickness 3 mm + offset (📦 #2016)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀40 mm to 100×100 mm, thickness 3 mm + offset
Model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀40 mm and a rectangular section with inner dimensions 100×100 mm. The shell thickness is 3 mm and the total length is 100 mm. The adapter has an offset of 1 mm along the Y axis.
Parameter Value Unit
cylinder outer diameter 40 mm
cylinder inlet length 10 mm
rectangle internal length 100 mm
rectangle internal height 100 mm
rectangle inlet length 9 mm
offset Z 0 mm
offset Y 1 mm
total length 100 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀32 mm to 35×20 mm, thickness 3 mm + offset (📦 #1618)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀32 mm to 35×20 mm, thickness 3 mm + offset
Model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀32 mm and a rectangular section with inner dimensions 35×20 mm. The shell thickness is 3 mm and the overall length is 60 mm. The adapter has an offset of 2 mm along the Z axis.
Parameter Value Unit
cylinder outer diameter 32 mm
cylinder inlet length 15 mm
rectangle internal length 35 mm
rectangle internal height 20 mm
rectangle inlet length 20 mm
offset Z 2 mm
offset Y 0 mm
total length 60 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀32 mm to 120×5 mm, thickness 2 mm (📦 #4521)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀32 mm to 120×5 mm, thickness 2 mm
Download this model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀32 mm and a rectangular section with inner dimensions 120×5 mm. The wall thickness is 2 mm and the total length is 120 mm.
Parameter Value Unit
cylinder outer diameter 32 mm
cylinder inlet length 20 mm
rectangle internal length 120 mm
rectangle internal height 5 mm
rectangle inlet length 20 mm
offset Z 0 mm
offset Y 0 mm
total length 120 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀36 mm to 50×5 mm, thickness 2 mm (📦 #4355)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀36 mm to 50×5 mm, thickness 2 mm
3D file in STL format of a round-to-rectangular adapter with an external diameter of ⌀36 mm and a rectangular section with internal dimensions 50×5 mm. The shell thickness is 2 mm and the overall length is 100 mm.
Parameter Value Unit
cylinder outer diameter 36 mm
cylinder inlet length 5 mm
rectangle internal length 50 mm
rectangle internal height 5 mm
rectangle inlet length 20 mm
offset Z 0 mm
offset Y 0 mm
total length 100 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀32 mm to 35×20 mm, thickness 3 mm + offset (📦 #1619)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀32 mm to 35×20 mm, thickness 3 mm + offset
Download this model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀32 mm and a rectangular section with inner dimensions 35×20 mm. The wall thickness is 3 mm and the total length is 60 mm. The adapter has an offset of 5 mm along the Z axis.
Parameter Value Unit
cylinder outer diameter 32 mm
cylinder inlet length 15 mm
rectangle internal length 35 mm
rectangle internal height 20 mm
rectangle inlet length 20 mm
offset Z 5 mm
offset Y 0 mm
total length 60 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀22 mm to 30×40 mm, thickness 3 mm (📦 #2914)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀22 mm to 30×40 mm, thickness 3 mm
Model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀22 mm and a rectangular section with inner dimensions 30×40 mm. The shell thickness is 3 mm and the total length is 60 mm.
Parameter Value Unit
cylinder outer diameter 22 mm
cylinder inlet length 20 mm
rectangle internal length 30 mm
rectangle internal height 40 mm
rectangle inlet length 10 mm
offset Z 0 mm
offset Y 0 mm
total length 60 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 35×25 mm, thickness 3 mm (📦 #2245)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 35×25 mm, thickness 3 mm
Download this 3D file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀50 mm and a rectangular section with inner dimensions 35×25 mm. The wall thickness is 3 mm and the total length is 100 mm.
Parameter Value Unit
cylinder outer diameter 50 mm
cylinder inlet length 25 mm
rectangle internal length 35 mm
rectangle internal height 25 mm
rectangle inlet length 25 mm
offset Z 0 mm
offset Y 0 mm
total length 100 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀32 mm to 50×5 mm, thickness 2 mm (📦 #4520)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀32 mm to 50×5 mm, thickness 2 mm
Download this 3D model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀32 mm and a rectangular section with inner dimensions 50×5 mm. The shell thickness is 2 mm and the overall length is 120 mm.
Parameter Value Unit
cylinder outer diameter 32 mm
cylinder inlet length 20 mm
rectangle internal length 50 mm
rectangle internal height 5 mm
rectangle inlet length 20 mm
offset Z 0 mm
offset Y 0 mm
total length 120 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀36 mm to 50×5 mm, thickness 2 mm (📦 #4358)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀36 mm to 50×5 mm, thickness 2 mm
File in STL format of a round-to-rectangular adapter with an outer diameter of ⌀36 mm and a rectangular section with internal dimensions 50×5 mm. The wall thickness is 2 mm and the overall length is 120 mm.
Parameter Value Unit
cylinder outer diameter 36 mm
cylinder inlet length 20 mm
rectangle internal length 50 mm
rectangle internal height 5 mm
rectangle inlet length 20 mm
offset Z 0 mm
offset Y 0 mm
total length 120 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀20 mm to 21×16 mm, thickness 3 mm (📦 #3337)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀20 mm to 21×16 mm, thickness 3 mm
Model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀20 mm and a rectangular section with inner dimensions 21×16 mm. The wall thickness is 3 mm and the total length is 50 mm.
Parameter Value Unit
cylinder outer diameter 20 mm
cylinder inlet length 15 mm
rectangle internal length 21 mm
rectangle internal height 16 mm
rectangle inlet length 10 mm
offset Z 0 mm
offset Y 0 mm
total length 50 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀26 mm to 35×20 mm, thickness 3 mm + offset (📦 #1617)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀26 mm to 35×20 mm, thickness 3 mm + offset
Model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀26 mm and a rectangular section with internal dimensions 35×20 mm. The wall thickness is 3 mm and the overall length is 60 mm. The adapter has an offset of 12.5 mm along the Z axis.
Parameter Value Unit
cylinder outer diameter 26 mm
cylinder inlet length 15 mm
rectangle internal length 35 mm
rectangle internal height 20 mm
rectangle inlet length 20 mm
offset Z 12.5 mm
offset Y 0 mm
total length 60 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀34 mm to 39.7×29.2 mm, thickness 3 mm (📦 #10226)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀34 mm to 39.7×29.2 mm, thickness 3 mm
File in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀34 mm and a rectangular section with inner dimensions 39.7×29.2 mm. The wall thickness is 3 mm and the overall length is 60 mm.
Parameter Value Unit
cylinder outer diameter 34 mm
cylinder inlet length 25 mm
rectangle internal length 39.7 mm
rectangle internal height 29.2 mm
rectangle inlet length 15 mm
offset Z 0 mm
offset Y 0 mm
total length 60 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀50 mm to 90×45 mm, thickness 2 mm (📦 #4485)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀50 mm to 90×45 mm, thickness 2 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 90×45 mm. The wall thickness is 2 mm and the overall length is 100 mm.
Parameter Value Unit
cylinder outer diameter 50 mm
cylinder inlet length 20 mm
rectangle internal length 90 mm
rectangle internal height 45 mm
rectangle inlet length 20 mm
offset Z 0 mm
offset Y 0 mm
total length 100 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀68 mm to 122×72 mm, thickness 3 mm (📦 #9883)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀68 mm to 122×72 mm, thickness 3 mm
3D model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀68 mm and a rectangular section with internal dimensions 122×72 mm. The wall thickness is 3 mm and the total length is 150 mm.
Parameter Value Unit
cylinder outer diameter 68 mm
cylinder inlet length 20 mm
rectangle internal length 122 mm
rectangle internal height 72 mm
rectangle inlet length 30 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 ⌀50 mm to 152×45 mm, thickness 3 mm (📦 #3349)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 152×45 mm, thickness 3 mm
Download this 3D file in STL format of a round-to-rectangular adapter with an external diameter of ⌀50 mm and a rectangular section with internal dimensions 152×45 mm. The wall thickness is 3 mm and the overall length is 110.3 mm. A chamfer is present on the outside of the cylindrical end.
Parameter Value Unit
cylinder outer diameter 50 mm
cylinder inlet length 25 mm
rectangle internal length 152 mm
rectangle internal height 45 mm
rectangle inlet length 25 mm
offset Z 0 mm
offset Y 0 mm
total length 110.3 mm
thickness 3 mm
chamfer chamfer on t...

Round-to-Rectangular Tube Adapter STL file ⌀71 mm to 122×72 mm, thickness 3 mm (📦 #9884)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀71 mm to 122×72 mm, thickness 3 mm
File in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀71 mm and a rectangular section with inner dimensions 122×72 mm. The wall thickness is 3 mm and the total length is 150 mm.
Parameter Value Unit
cylinder outer diameter 71 mm
cylinder inlet length 20 mm
rectangle internal length 122 mm
rectangle internal height 72 mm
rectangle inlet length 30 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 file ⌀73 mm to 122×72 mm, thickness 3 mm (📦 #9882)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀73 mm to 122×72 mm, thickness 3 mm
Download this 3D file in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀73 mm and a rectangular section with inner dimensions 122×72 mm. The shell thickness is 3 mm and the total length is 150 mm.
Parameter Value Unit
cylinder outer diameter 73 mm
cylinder inlet length 20 mm
rectangle internal length 122 mm
rectangle internal height 72 mm
rectangle inlet length 30 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 file ⌀76 mm to 90×40 mm, thickness 3 mm + offset (📦 #7198)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀76 mm to 90×40 mm, thickness 3 mm + offset
File in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀76 mm and a rectangular section with internal dimensions 90×40 mm. The wall thickness is 3 mm and the overall length is 150 mm. The adapter has an offset of 10 mm along the Y axis.
Parameter Value Unit
cylinder outer diameter 76 mm
cylinder inlet length 20 mm
rectangle internal length 90 mm
rectangle internal height 40 mm
rectangle inlet length 15 mm
offset Z 0 mm
offset Y 10 mm
total length 150 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀32 mm to 90×5 mm, thickness 2 mm (📦 #8449)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀32 mm to 90×5 mm, thickness 2 mm
Download this file in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀32 mm and a rectangular section with inner dimensions 90×5 mm. The wall thickness is 2 mm and the overall length is 120 mm.
Parameter Value Unit
cylinder outer diameter 32 mm
cylinder inlet length 30 mm
rectangle internal length 90 mm
rectangle internal height 5 mm
rectangle inlet length 20 mm
offset Z 0 mm
offset Y 0 mm
total length 120 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀75 mm to 122×72 mm, thickness 3 mm (📦 #9880)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀75 mm to 122×72 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 122×72 mm. The wall thickness is 3 mm and the total length is 150 mm.
Parameter Value Unit
cylinder outer diameter 75 mm
cylinder inlet length 19 mm
rectangle internal length 122 mm
rectangle internal height 72 mm
rectangle inlet length 30 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 file ⌀75 mm to 121×70 mm, thickness 3 mm (📦 #9904)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀75 mm to 121×70 mm, thickness 3 mm
Download this 3D file in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀75 mm and a rectangular section with inner dimensions 121×70 mm. The wall thickness is 3 mm and the total length is 150 mm.
Parameter Value Unit
cylinder outer diameter 75 mm
cylinder inlet length 20 mm
rectangle internal length 121 mm
rectangle internal height 70 mm
rectangle inlet length 30 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 file ⌀32 mm to 80×5 mm, thickness 2 mm (📦 #8448)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀32 mm to 80×5 mm, thickness 2 mm
Download this file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀32 mm and a rectangular section with inner dimensions 80×5 mm. The wall thickness is 2 mm and the overall length is 120 mm.
Parameter Value Unit
cylinder outer diameter 32 mm
cylinder inlet length 30 mm
rectangle internal length 80 mm
rectangle internal height 5 mm
rectangle inlet length 20 mm
offset Z 0 mm
offset Y 0 mm
total length 120 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀38 mm to 100×50 mm, thickness 2 mm (📦 #4359)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀38 mm to 100×50 mm, thickness 2 mm
Download this model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀38 mm and a rectangular section with inner dimensions 100×50 mm. The wall thickness is 2 mm and the overall length is 50 mm.
Parameter Value Unit
cylinder outer diameter 38 mm
cylinder inlet length 5 mm
rectangle internal length 100 mm
rectangle internal height 50 mm
rectangle inlet length 5 mm
offset Z 0 mm
offset Y 0 mm
total length 50 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀60 mm to 150×20 mm, thickness 3 mm + offset (📦 #3682)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀60 mm to 150×20 mm, thickness 3 mm + offset
Model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀60 mm and a rectangular section with internal dimensions 150×20 mm. The shell thickness is 3 mm and the total length is 60 mm. The adapter has an offset of 15 mm along the Z axis.
Parameter Value Unit
cylinder outer diameter 60 mm
cylinder inlet length 15 mm
rectangle internal length 150 mm
rectangle internal height 20 mm
rectangle inlet length 15 mm
offset Z 15 mm
offset Y 0 mm
total length 60 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀81 mm to 108×52 mm, thickness 3 mm + offset (📦 #4011)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀81 mm to 108×52 mm, thickness 3 mm + offset
File in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀81 mm and a rectangular section with internal dimensions 108×52 mm. The wall thickness is 3 mm and the total length is 120 mm. The adapter has an offset of 10 mm along the Y axis.
Parameter Value Unit
cylinder outer diameter 81 mm
cylinder inlet length 15 mm
rectangle internal length 108 mm
rectangle internal height 52 mm
rectangle inlet length 15 mm
offset Z 0 mm
offset Y 10 mm
total length 120 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀32 mm to 60×5 mm, thickness 2 mm (📦 #8447)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀32 mm to 60×5 mm, thickness 2 mm
3D model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀32 mm and a rectangular section with internal dimensions 60×5 mm. The shell thickness is 2 mm and the total length is 120 mm.
Parameter Value Unit
cylinder outer diameter 32 mm
cylinder inlet length 30 mm
rectangle internal length 60 mm
rectangle internal height 5 mm
rectangle inlet length 20 mm
offset Z 0 mm
offset Y 0 mm
total length 120 mm
thickness 2 mm
chamfer no chamfer