Custom Oval hose adapter STL file 26.1x26 mm to 70x35 mm – transition: 100 mm 📦#12519

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Oval hose fitting in STL 3D file format. Side A offers an internal cross-section of 26.1x26 mm (nearly circular) and side B 70x35 mm (oval). The useful lengths are 50 mm (A) and 20 mm (B), respectively. Between the two sleeves, the transition runs over 100 mm, resulting in an overall length of 170 mm. The ends are straight, with no chamfer at all. Compared to side A, side B is shifted by 30 mm along the Y axis and 30 mm along the Z axis.
Generation date: 2026-10-12
3D Model Oval hose adapter STL file 26.1x26 mm to 70x35 mm – transition: 100 mm

3D model download

Free
  • oval-duct-transition-fitting-w_model12519-nb0_dd{id}.stl : 2.6 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)
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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 26.1 mm (≃1.03 in)
#2 side A internal height 26 mm (≃1.02 in)
#3 sleeve length on side A 50 mm (≃1.97 in)
#4 side B internal width 70 mm (≃2 3/4 in)
#5 side B internal height 35 mm (≃1 3/8 in)
#6 sleeve length on side B 20 mm (≃0.79 in)
#7 thickness 3 mm (≃1/8 in)
#8 transition length 100 mm (≃3 15/16 in)
#9 Y offset 30 mm (≃1 3/16 in)
#10 Z offset 30 mm (≃1 3/16 in)
#11 end chamfers none
Metadata Value
external width on side A 32.1 mm (≃1 1/4 in)
external height on side A 32 mm (≃1 1/4 in)
external width on side B 76 mm (≃3 in)
external height on side B 41 mm (≃1 5/8 in)
total length 170 mm (≃6 11/16 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 pipe adapter provided as a STL 3D file. Side A offers an internal cross-section of 38.7x38.6 mm (nearly circular) and side B 50x14 mm (oval). On side A, the sleeve is 50 mm long, and on side B 20 mm. The transition section between the two ends is 120 mm long, for an overall length of 190 mm (sleeve A, transition and sleeve B). The ends are left without chamfers, with raw inner and outer edges. Compared to side A, side B is shifted by 30 mm along the Y axis and 30 mm along the Z axis.
Parameter Value Unit
side A internal width 38.7 mm
side A internal height 38.6 mm
sleeve length on side A 50 mm
side B internal width 50 mm
side B internal height 14 mm
sleeve length on side B 20 mm
thickness 2 mm
transition length 120 mm
Y offset 30 mm
Z offset 30 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
Oval duct coupling provided as a STL 3D file. Side A offers an internal cross-section of 26.1x26 mm (nearly circular) and side B 75x28 mm (oval). The useful lengths are 40 mm (A) and 30 mm (B), respectively. The transition links the two ends over 55 mm, with a total overall length of 125 mm. The ends are straight, with no chamfer at all. Compared to side A, side B is shifted by 22 mm along the Y axis.
Parameter Value Unit
side A internal width 26.1 mm
side A internal height 26 mm
sleeve length on side A 40 mm
side B internal width 75 mm
side B internal height 28 mm
sleeve length on side B 30 mm
thickness 2 mm
transition length 55 mm
Y offset 22 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
STL 3D file for an oval adapter. Side A offers an internal cross-section of 110.1x110 mm (nearly circular) and side B 180x40 mm (oval). Both sleeves share an identical useful length of 40 mm. The transition links the two ends over 70 mm, with a total overall length of 150 mm. Internal chamfers are added at the ends to make assembly and duct insertion easier. An offset of 35 mm along the Y axis and 35 mm along the Z axis is applied to side B relative to side A.
Parameter Value Unit
side A internal width 110.1 mm
side A internal height 110 mm
sleeve length on side A 40 mm
side B internal width 180 mm
side B internal height 40 mm
sleeve length on side B 40 mm
thickness 2 mm
transition length 70 mm
Y offset 35 mm
Z offset 35 mm
end chamfers inside
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
Oval hose adapter in STL 3D file format. On side A, the internal cross-section is 55x25 mm (oval), whereas on side B it is 43x42 mm (nearly circular). The sleeve on side A provides a useful length of 50 mm, and on side B 30 mm. The central transition occupies 20 mm, bringing the overall length to 100 mm. The ends are left without chamfers, with raw inner and outer edges.
Parameter Value Unit
side A internal width 55 mm
side A internal height 25 mm
sleeve length on side A 50 mm
side B internal width 43 mm
side B internal height 42 mm
sleeve length on side B 30 mm
thickness 3 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers none
Oval coupling provided as a STL 3D file. The internal cross-section on side A is 54x38 mm (oval), while on side B it is 43x42 mm (nearly circular). Both sleeves share an identical useful length of 30 mm. The transition section between the two ends is 20 mm long, for an overall length of 80 mm (sleeve A, transition and sleeve B). The ends are straight, with no chamfer at all.
Parameter Value Unit
side A internal width 54 mm
side A internal height 38 mm
sleeve length on side A 30 mm
side B internal width 43 mm
side B internal height 42 mm
sleeve length on side B 30 mm
thickness 3 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers none
STL 3D file for an oval adapter. The internal cross-section on side A is 130x90 mm, while on side B it is 100x40 mm. The useful sleeve length on side A is 50 mm, while on side B it reaches 20 mm. The transition section between the two ends is 100 mm long, for an overall length of 170 mm (sleeve A, transition and sleeve B). No chamfer is applied at the ends, so both the inner and outer edges remain sharp.
Parameter Value Unit
side A internal width 130 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 0 mm
Z offset 0 mm
end chamfers none
Oval coupling in STL 3D file format. The internal cross-section on side A is 30.7x30.6 mm (nearly circular), while on side B it is 30.7x12 mm (oval). The useful length is consistent on both ends: 20 mm. The central transition occupies 20 mm, bringing the overall length to 60 mm. The ends are straight, with no chamfer at all. Compared to side A, side B is shifted by 10 mm along the Z axis.
Parameter Value Unit
side A internal width 30.7 mm
side A internal height 30.6 mm
sleeve length on side A 20 mm
side B internal width 30.7 mm
side B internal height 12 mm
sleeve length on side B 20 mm
thickness 2 mm
transition length 20 mm
Y offset 0 mm
Z offset 10 mm
end chamfers none
Oval coupling available as a STL 3D file. On side A, the internal cross-section is 160x50 mm (oval), whereas on side B it is 45.1x45 mm (nearly circular). Both sleeves share an identical useful length of 20 mm. The transition section between the two ends is 20 mm long, for an overall length of 60 mm (sleeve A, transition and sleeve B). Both the inner and outer edges at the ends remain unchamfered. Side B is offset by 10 mm along the Y axis relative to side A.
Parameter Value Unit
side A internal width 160 mm
side A internal height 50 mm
sleeve length on side A 20 mm
side B internal width 45.1 mm
side B internal height 45 mm
sleeve length on side B 20 mm
thickness 3 mm
transition length 20 mm
Y offset 10 mm
Z offset 0 mm
end chamfers none
Oval adapter in STL 3D file format. Side A offers an internal cross-section of 20x19.9 mm and side B 12x11.9 mm, both close to circular. On side A, the sleeve is 35 mm long, and on side B 14 mm. The transition section between the two ends is 30 mm long, for an overall length of 79 mm (sleeve A, transition and sleeve B). The ends are left without chamfers, with raw inner and outer edges.
Parameter Value Unit
side A internal width 20 mm
side A internal height 19.9 mm
sleeve length on side A 35 mm
side B internal width 12 mm
side B internal height 11.9 mm
sleeve length on side B 14 mm
thickness 2 mm
transition length 30 mm
Y offset 0 mm
Z offset 0 mm
end chamfers none
Oval duct transition adapter provided as a STL 3D file. Side A offers an internal cross-section of 53x38 mm (oval) and side B 51x50 mm (nearly circular). Both sleeves share an identical useful length of 25 mm. The transition section is 20 mm long, for a final overall length of 70 mm. No chamfer is applied at the ends, so both the inner and outer edges remain sharp.
Parameter Value Unit
side A internal width 53 mm
side A internal height 38 mm
sleeve length on side A 25 mm
side B internal width 51 mm
side B internal height 50 mm
sleeve length on side B 25 mm
thickness 3 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers none
Oval hose adapter provided as a STL 3D file. The internal cross-sections on sides A and B are identical, 26x17 mm. The useful sleeve length is the same on both sides, 20 mm. The transition section is 20 mm long, for a final overall length of 60 mm. The internal edges at the ends are chamfered to help guide the duct during insertion. Compared to side A, side B is shifted by 1.3 mm along the Y axis and 8.5 mm along the Z axis.
Parameter Value Unit
side A internal width 26 mm
side A internal height 17 mm
sleeve length on side A 20 mm
side B internal width 26 mm
side B internal height 17 mm
sleeve length on side B 20 mm
thickness 3 mm
transition length 20 mm
Y offset 1.3 mm
Z offset 8.5 mm
end chamfers inside
STL 3D file for an oval hose fitting. On side A, the internal cross-section is 170x75 mm (oval), whereas on side B it is 96.1x96 mm (nearly circular). The sleeves also differ in useful length: 100 mm on side A and 20 mm on side B. The transition portion extends over 60 mm and the overall length, sleeves included, is 180 mm. Internal chamfers are added at the ends to make assembly and duct insertion easier. An offset of 30 mm along the Y axis and 30 mm along the Z axis is applied to side B relative to side A.
Parameter Value Unit
side A internal width 170 mm
side A internal height 75 mm
sleeve length on side A 100 mm
side B internal width 96.1 mm
side B internal height 96 mm
sleeve length on side B 20 mm
thickness 3 mm
transition length 60 mm
Y offset 30 mm
Z offset 30 mm
end chamfers inside
STL 3D file for an oval pipe adapter. Side A offers an internal cross-section of 67x47 mm and side B 55x35 mm. A uniform useful length of 10 mm is available on both sleeves. The central transition occupies 90 mm, bringing the overall length to 110 mm. The ends are left without chamfers, with raw inner and outer edges.
Parameter Value Unit
side A internal width 67 mm
side A internal height 47 mm
sleeve length on side A 10 mm
side B internal width 55 mm
side B internal height 35 mm
sleeve length on side B 10 mm
thickness 2 mm
transition length 90 mm
Y offset 0 mm
Z offset 0 mm
end chamfers none
STL 3D file for an oval adapter. Side A offers an internal cross-section of 90x10 mm (oval) and side B 37.5x37.4 mm (nearly circular). Each sleeve provides a useful length of 40 mm. The transition section is 50 mm long, for a final overall length of 130 mm. The internal chamfers help start the duct insertion more easily.
Parameter Value Unit
side A internal width 90 mm
side A internal height 10 mm
sleeve length on side A 40 mm
side B internal width 37.5 mm
side B internal height 37.4 mm
sleeve length on side B 40 mm
thickness 2 mm
transition length 50 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside
Oval hose adapter available as a STL 3D file. The internal cross-section on side A is 36.1x32.9 mm (oval), while on side B it is 31.6x31.5 mm (nearly circular). Both sleeves share an identical useful length of 42 mm. The transition section is 20 mm long, for a final overall length of 104 mm. The internal edges at the ends are chamfered to help guide the duct during insertion.
Parameter Value Unit
side A internal width 36.1 mm
side A internal height 32.9 mm
sleeve length on side A 42 mm
side B internal width 31.6 mm
side B internal height 31.5 mm
sleeve length on side B 42 mm
thickness 3 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside
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.
Parameter Value Unit
side A internal width 80 mm
side A internal height 30 mm
sleeve length on side A 20 mm
side B internal width 50 mm
side B internal height 15 mm
sleeve length on side B 100 mm
thickness 4 mm
transition length 40 mm
Y offset 20 mm
Z offset 0 mm
end chamfers none
Oval duct fitting in STL 3D file format. The internal cross-section on side A is 69x39 mm (oval), while on side B it is 70x69 mm (nearly circular). The useful sleeve length on side A is 20 mm, while on side B it reaches 10 mm. The transition section is 30 mm long, for a final overall length of 60 mm. The ends are straight, with no chamfer at all.
Parameter Value Unit
side A internal width 69 mm
side A internal height 39 mm
sleeve length on side A 20 mm
side B internal width 70 mm
side B internal height 69 mm
sleeve length on side B 10 mm
thickness 3 mm
transition length 30 mm
Y offset 0 mm
Z offset 0 mm
end chamfers none
Oval hose adapter in STL 3D file format. On side A, the internal cross-section is 52x40 mm (oval), whereas on side B it is 44x43 mm (nearly circular). Each sleeve provides a useful length of 30 mm. Between the two sleeves, the transition runs over 20 mm, resulting in an overall length of 80 mm. Internal chamfers are added at the ends to make assembly and duct insertion easier.
Parameter Value Unit
side A internal width 52 mm
side A internal height 40 mm
sleeve length on side A 30 mm
side B internal width 44 mm
side B internal height 43 mm
sleeve length on side B 30 mm
thickness 3 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside
Oval pipe adapter in STL 3D file format. The internal cross-section on side A is 52x39 mm (oval), while on side B it is 47x46 mm (nearly circular). The useful sleeve length is the same on both sides, 30 mm. The transition section is 20 mm long, for a final overall length of 80 mm. The internal edges at the ends are chamfered to help guide the duct during insertion.
Parameter Value Unit
side A internal width 52 mm
side A internal height 39 mm
sleeve length on side A 30 mm
side B internal width 47 mm
side B internal height 46 mm
sleeve length on side B 30 mm
thickness 3 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside
Oval pipe adapter in STL 3D file format. Side A offers an internal cross-section of 106x52 mm (oval) and side B 72x71 mm (nearly circular). The sleeve on side A provides a useful length of 35 mm, and on side B 25 mm. The central transition occupies 32 mm, bringing the overall length to 92 mm. Both the inner and outer edges at the ends remain unchamfered.
Parameter Value Unit
side A internal width 106 mm
side A internal height 52 mm
sleeve length on side A 35 mm
side B internal width 72 mm
side B internal height 71 mm
sleeve length on side B 25 mm
thickness 2 mm
transition length 32 mm
Y offset 0 mm
Z offset 0 mm
end chamfers none
Oval hose adapter provided as a STL 3D file. On side A, the internal cross-section is 105x35 mm, whereas on side B it is 105x34 mm. The useful sleeve length is the same on both sides, 40 mm. The transition links the two ends over 20 mm, with a total overall length of 100 mm. Internal chamfers are added at the ends to make assembly and duct insertion easier.
Parameter Value Unit
side A internal width 105 mm
side A internal height 35 mm
sleeve length on side A 40 mm
side B internal width 105 mm
side B internal height 34 mm
sleeve length on side B 40 mm
thickness 3 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside
Oval duct coupling available as a STL 3D file. On side A, the internal cross-section is 20.1x20 mm (nearly circular), whereas on side B it is 35x15 mm (oval). A uniform useful length of 25 mm is available on both sleeves. The transition section between the two ends is 20 mm long, for an overall length of 70 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 20.1 mm
side A internal height 20 mm
sleeve length on side A 25 mm
side B internal width 35 mm
side B internal height 15 mm
sleeve length on side B 25 mm
thickness 2 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside