Custom Oval duct transition fitting STL 3D file 80x30 mm to 50x15 mm – transition: 40 mm 📦#4239

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Oval adapter available as a STL 3D file. The internal cross-section on side A is 80x30 mm, while on side B it is 50x15 mm. The useful lengths are 20 mm (A) and 100 mm (B), respectively. The transition section between the two ends is 40 mm long, for an overall length of 160 mm (sleeve A, transition and sleeve B). A thickness of 4 mm provides good stiffness. Both the inner and outer edges at the ends remain unchamfered. Compared to side A, side B is shifted by 20 mm along the Y axis.
Generation date: 2025-12-03
3D Model Oval duct transition fitting STL 3D file 80x30 mm to 50x15 mm – transition: 40 mm

3D model download

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  • oval-duct-transition-fitting-w_model4239-nb0_dd{id}.stl : 1.8 Mo
STL Mesh quality : Linear deflection 0.0005 Angular deflection 0.05
No compliance warranty No compliance warranty
(attribution - non commercial use - no derivatives)
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Values for this model

This model was generated by the Oval duct transition fitting / hose-shaped reducer template, with the following values:
Parameter Value
#1 side A internal width 80 mm (≃3.15 in)
#2 side A internal height 30 mm (≃1 3/16 in)
#3 sleeve length on side A 20 mm (≃0.79 in)
#4 side B internal width 50 mm (≃1.97 in)
#5 side B internal height 15 mm (≃0.59 in)
#6 sleeve length on side B 100 mm (≃3 15/16 in)
#7 thickness 4 mm (≃0.16 in)
#8 transition length 40 mm (≃1 9/16 in)
#9 Y offset 20 mm (≃0.79 in)
#10 Z offset 0 mm (0 in)
#11 end chamfers none
Metadata Value
external width on side A 88 mm (≃3.46 in)
external height on side A 38 mm (≃1 1/2 in)
external width on side B 58 mm (≃2.28 in)
external height on side B 23 mm (≃0.91 in)
total length 160 mm (≃6 5/16 in)
illustration of the parameters
Parameter overview

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

Parameter Label
#1 side A internal width widOA
#2 side A internal height heiOA
#3 sleeve length on side A lenSA
#4 side B internal width widOB
#5 side B internal height heiOB
#6 sleeve length on side B lenSB
#7 thickness thi
#8 transition length tra
#9 Y offset ofsY
#10 Z offset ofsZ
#11 end chamfers cha

Related 3D models

To search for a model based on your own parameters, go to the template page Oval duct transition fitting / hose-shaped reducer 

Oval duct coupling provided as a STL 3D file. The internal cross-section on side A is 79x33 mm (oval), while on side B it is 46x45 mm (nearly circular). The useful sleeve length is the same on both sides, 10 mm. Between the two sleeves, the transition runs over 20 mm, resulting in an overall length of 40 mm. Both the inner and outer edges at the ends remain unchamfered.
Parameter Value Unit
side A internal width 79 mm
side A internal height 33 mm
sleeve length on side A 10 mm
side B internal width 46 mm
side B internal height 45 mm
sleeve length on side B 10 mm
thickness 2 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers none
STL 3D file for an oval duct transition adapter. The internal cross-sections on sides A and B are identical, 60x20 mm. The useful length is consistent on both ends: 15 mm. Between the two sleeves, the transition runs over 140 mm, resulting in an overall length of 170 mm. Both the inner and outer edges at the ends remain unchamfered. An offset of 40 mm along the Y axis and 70 mm along the Z axis is applied to side B relative to side A.
Parameter Value Unit
side A internal width 60 mm
side A internal height 20 mm
sleeve length on side A 15 mm
side B internal width 60 mm
side B internal height 20 mm
sleeve length on side B 15 mm
thickness 3 mm
transition length 140 mm
Y offset 40 mm
Z offset 70 mm
end chamfers none
Oval duct coupling provided as a STL 3D file. The internal cross-sections on sides A and B are identical, 60x20 mm. The useful length is consistent on both ends: 15 mm. The central transition occupies 140 mm, bringing the overall length to 170 mm. The ends are left without chamfers, with raw inner and outer edges. Side B is offset by 40 mm along the Y axis and 70 mm along the Z axis relative to side A.
Parameter Value Unit
side A internal width 60 mm
side A internal height 20 mm
sleeve length on side A 15 mm
side B internal width 60 mm
side B internal height 20 mm
sleeve length on side B 15 mm
thickness 2 mm
transition length 140 mm
Y offset 40 mm
Z offset 70 mm
end chamfers none
STL 3D file for an oval coupling. The internal cross-section on side A is 90.1x90 mm (nearly circular), while on side B it is 100x40 mm (oval). On side A, the sleeve is 50 mm long, and on side B 20 mm. The transition section is 100 mm long, for a final overall length of 170 mm. The ends are straight, with no chamfer at all. Side B is offset by 30 mm along the Y axis and 30 mm along the Z axis relative to side A.
Parameter Value Unit
side A internal width 90.1 mm
side A internal height 90 mm
sleeve length on side A 50 mm
side B internal width 100 mm
side B internal height 40 mm
sleeve length on side B 20 mm
thickness 3 mm
transition length 100 mm
Y offset 30 mm
Z offset 30 mm
end chamfers none
STL 3D file for an oval hose fitting. On side A, the internal cross-section is 80.1x80 mm (nearly circular), whereas on side B it is 80x40 mm (oval). The sleeve on side A provides a useful length of 5 mm, and on side B 10 mm. The transition section is 20 mm long, for a final overall length of 35 mm. The wall is on the thicker side at 4 mm. External chamfers at the ends help with engagement and assembly within the duct system.
Parameter Value Unit
side A internal width 80.1 mm
side A internal height 80 mm
sleeve length on side A 5 mm
side B internal width 80 mm
side B internal height 40 mm
sleeve length on side B 10 mm
thickness 4 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers outside
Oval duct fitting in STL 3D file format. Side A offers an internal cross-section of 120x80 mm and side B 90x70 mm. The useful sleeve length is the same on both sides, 20 mm. The transition portion extends over 30 mm and the overall length, sleeves included, is 70 mm. The ends are left without chamfers, with raw inner and outer edges.
Parameter Value Unit
side A internal width 120 mm
side A internal height 80 mm
sleeve length on side A 20 mm
side B internal width 90 mm
side B internal height 70 mm
sleeve length on side B 20 mm
thickness 3 mm
transition length 30 mm
Y offset 0 mm
Z offset 0 mm
end chamfers none
Oval connector available as a STL 3D file. On side A, the internal cross-section is 140x40 mm, whereas on side B it is 130x35 mm. The useful sleeve length on side A is 8 mm, while on side B it reaches 6 mm. The transition section between the two ends is 40 mm long, for an overall length of 54 mm (sleeve A, transition and sleeve B). The internal edges at the ends are chamfered to help guide the duct during insertion.
Parameter Value Unit
side A internal width 140 mm
side A internal height 40 mm
sleeve length on side A 8 mm
side B internal width 130 mm
side B internal height 35 mm
sleeve length on side B 6 mm
thickness 2 mm
transition length 40 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside
Oval hose fitting available as a STL 3D file. On side A, the internal cross-section is 140x40 mm, whereas on side B it is 130x35 mm. On side A, the sleeve is 8 mm long, and on side B 6 mm. The transition portion extends over 20 mm and the overall length, sleeves included, is 34 mm. Internal chamfers at the ends improve assembly and make insertion smoother.
Parameter Value Unit
side A internal width 140 mm
side A internal height 40 mm
sleeve length on side A 8 mm
side B internal width 130 mm
side B internal height 35 mm
sleeve length on side B 6 mm
thickness 2 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside