Popular fittings › Reducing magnetic pair
Reducing magnetic pair
A machine-mounted magnetic interface with a smaller linked hose half. Free 3D printable.
Open in the designer →
Opens with the sizes below. Change anything, then export 3MF, STL or STEP. Free, no account, runs in your browser.
Starting sizes
| End | Inner size | Connection |
|---|---|---|
| Inlet | 100 mm (3.94 in) | Mounting flange |
| Outlet | 100 mm (3.94 in) | Axial magnet coupling |
Need another size? Every dimension is editable in the designer, in millimetres or inches.
What it is
A magnetic quick disconnect whose hose half is smaller than the machine half, so it also acts as a reducer.
How to measure
Measure the magnets you bought (diameter and thickness, or ring size) before exporting: the pockets are cut to those numbers plus the clearance you set. For each end, measure the hose, pipe or port it joins with calipers. If that part slides into the fitting, measure its outside diameter and keep “Measure by: Inner diameter”. If the fitting slides into a hose, measure the hose’s inside diameter and switch to “Outer diameter”. Measure twice across the circle; flexible hose is rarely perfectly round.
Print tips
- The export already places every component in its recommended print orientation. Keep supports off sleeves, sockets and any sliding or tight-fit surface so they stay smooth; if your slicer asks for supports, paint them only where an outside overhang needs them.
- Glue magnets with every pocket on one half facing the same way and the opposite way on the other half; test polarity before the glue sets.
- The “To buy” list shows the purchased hardware it needs.
Frequently asked questions
- What size should I measure?
- Measure the magnets you bought (diameter and thickness, or ring size) before exporting: the pockets are cut to those numbers plus the clearance you set. For each end, measure the hose, pipe or port it joins with calipers. If that part slides into the fitting, measure its outside diameter and keep “Measure by: Inner diameter”. If the fitting slides into a hose, measure the hose’s inside diameter and switch to “Outer diameter”. Measure twice across the circle; flexible hose is rarely perfectly round.
- What should I print it in?
- PLA or PETG both work for dust collection at room temperature. Print in PETG or ASA if the air is warm or the part sits in the sun. Use 3–4 perimeters for an airtight wall; infill matters much less than wall count for ducts.
- What hardware do I need to buy?
- At these starting sizes it needs: bolts or screws, washers, magnets. The “To buy” list in the designer gives the exact sizes, lengths and quantities for your dimensions.
- Does it need supports?
- The export already places every component in its recommended print orientation. Keep supports off sleeves, sockets and any sliding or tight-fit surface so they stay smooth; if your slicer asks for supports, paint them only where an outside overhang needs them.
More popular fittings
100 mm magnetic hose couplingA 3D printable 100 mm magnetic quick disconnect: two matching halves with recessed pockets for disc magnets. Free and adjustable.
2.5 inch magnetic shop vac couplingQuick-disconnect a 2.5 inch shop vac hose with magnets. Two printable halves with real magnet pockets; resize to any hose.
Magnetic hose couplingA magnetic quick disconnect with recessed magnet pockets and a matching hose half. Free 3D printable, any hose size.
Radial magnet cuffMagnet pockets cut radially into a circular collar. A free 3D printable magnetic hose cuff, any size.
Ring magnet couplingA continuous annular recess for a ring magnet, with configurable width and depth. Free 3D printable coupling.
Magnetic Y splitterTool-free branch swaps with independently configured magnetic flanges. Free 3D printable Y, any hose size.