
1 1/4 to 1/2 Adapter STL Models for 3D Printing
This collection gathers STL models for 1 1/4 to 1/2 reducing adapters, hose barbs, threaded fittings, bit holders and bottle-cap adapters. It is useful when you need to connect mismatched parts or replace a broken fitting with a 3D printed piece. The models vary from simple one-piece adapters to multi-part assemblies. Polyzon does not confirm whether models are free, their price, license, official status, affiliation, safety or fitness. Check the current terms at the source.
Le texte de cette collection est rédigé en anglais ; la recherche, elle, fonctionne dans toutes les langues.
Comment cette collection est composée
Polyzon compose cette collection à partir des résultats de recherche des plateformes connectées. Les doublons et les modèles sans aperçu sont retirés, les correspondances faibles sont placées à la fin, et le reste suit l’ordre de la recherche. Les modèles appartiennent à leurs auteurs : consultez les conditions sur la page de chaque modèle.
Règles de sélection : la rédaction de Polyzon · Texte mis à jour le 15/10/2026
Par où commencer
Tous les modèles de cette collection
![[1/4] Skeleton Bros Collection](https://cache.polyzon.org/api/img?url=https%3A%2F%2Fpic2-cdn.creality.com%2Fcomp%2Fmodel%2F268eb7eb16590c83f1837fb99359b261.webp&w=300)
[1/4] Skeleton Bros Collection

Adapter 1/2 square to 1/4 hex bit

14 to 12

Bottle Can Holder Sets of 1/2/3/4

cool design watchholder / watch stand organizer for 1 to 4

High Torque 160:1 Compound Planetary Gearbox

1 1/4" to 1/2" Reducing Barb for Shop Vac powered Air Conditioner Drainage

Raccordi Idraulici 1/2'' M →Tubi Ø interno 4–24 mm

Corner Radius Router 1/4 to 6

RMS TITANIC - scale 1/1000

2-Liter / Soda Bottle Cap to 1/4" Drip Irrigation Adapter

Barb Union Tube / Hose Splice joint fitting

Carrera 1/32-1/24 Track Supports

Keychain camera tripod (1/4 screw)

1/2" to 3/4" threaded adapter

Dog food scoop (1/4, 1/3, 1/2, 2/3, 3/4,1cup)

15PC Pilot Point Drill Bit Set Case 1/16° - 1/2

Miniature Queen Anne Sofa

Adapter 1/2'' to 3/4''

Schlauch Schnellkupplung 1/2" und 3/4"

metric bolt knob set m2 m3 m4 m5 m6 1/4"

Miniature Mantel

Electric duct junction reducer ICTA (3/4" to 1/2") 20mm to 16mm

Halterung New 4-in-1 PTFE Adapter II H2C H2D H2S

Universal Air Tool Holder for EURO 1/4″ Quick-Coupler
Camera screw 1/4"

Gardenhose 3/4" to 1/2" adapter

Gartenschlauch Wandklammer 1/2" und 3/4"

1/2'' Garden Hose Connector – Easy Lock System

Planetary Gearbox 4:1 Stackable

Gardenhose 1/2" to 3/4" adapter

10 in 1 Ultimate Multi Fidget

Faucet Female Thread M22x1 and M25x1.5 Adaptor

Ipad Mini Stand

1 1/4 pipe to 1 1/2 pipe adapter gasket

D30 Water barrel connection 3/4" D19 1" D25 Regen

Oil Barrel - 1:32 to 1:10 scale & free scalable

Woodworking machine 4" to 2 1/2" vacuum adapter

PS5 Keychain

INPRIME R/C 1/18-1/24 CRAWLING ROCKS

1/4'' BSP male thread to 8mm hose fitting

G 1 1/2" to G 1 1/4" reduction for drain

3/4 Pipe Thread to 1/2 3/4 1" Hose Barb Adapters

2.5" Dust Collection Head -Router/Tabletop/Floor/Drill Press

Streetlamp
«1 1/4 to 1/2 Adapter STL Models for 3D Printing»
The main groups differ by interface. Hose barb reducers and splices use ribbed ends for flexible tubing, while threaded pipe adapters rely on matching thread profiles. Bit and tool adapters convert one drive shape to another, and bottle-cap adapters join containers to tubing or drip lines. Some designs are single pieces; others include nuts, unions or separate caps.
When choosing a model, check the author's page for the stated size and scale, the number of parts and assembly steps, and whether supports are needed. Look at the material and settings the author lists, plus photos of real prints. Threaded and barbed parts are sensitive to orientation and wall thickness, so a small change in scale can affect how they fit.
To refine the search, try synonyms such as reducer, reducing barb, pipe thread adapter, hose splice, square-to-hex adapter, or bottle cap adapter. Related topics include irrigation fittings, pneumatic connectors, tool bit holders, and replacement caps. Adding the interface type and the dimensions you need usually narrows the results faster than a single broad phrase.
Questions fréquentes
What does a 1 1/4 to 1/2 adapter do?
How do I choose between a hose barb and a threaded adapter?
What should I check before printing an adapter?
Can I scale an adapter model to fit another size?
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