4 in. (101.6mm) Dust Port Adapter: Measure Yours, Build to Your Number
GulpDust prints dust collection adapters in PETG to the numbers you give us. This page is for one case: you put calipers on a dust port or a hose end, and the number was close to 4 in. (101.6mm).
Your reading may be a little over or a little under 4 in. (101.6mm). That is normal. Enter what you measured and we build to that number. Made in the USA.
Build an adapter to the number you measured
Measure both ends, enter your two numbers, and we print the part between them in PETG. Made in the USA.
How to measure your port
Use calipers. If the port sticks out, measure across the outside. If the port is an opening, measure across the inside. If it is a hose cuff, measure the cuff where the adapter will sit.
Write down the number your calipers show, not the number printed on the tool or the box. The size guide shows where to put the jaws.
What you can order at 4 in.
If your calipers read about 4 in., the builder prints that end of the adapter to the number you enter. We do not guess a size from a tool name, and we do not round your number to a standard size. Fit depends on your measurement, so measure twice.
Parts we sell with this size in the name.
Fittings 15
- 4 inch Cross Fitting - 3D Printed Dust Collection Fitting
- 4 inch Tee Fitting - 3D Printed Dust Collection Fitting
- 4 inch to 2-1/2 inch Tee Fitting - 3D Printed Dust Collection Fitting
- 4 inch to 2-1/4 inch Tapered Transition - 3D Printed Dust Collection
- 4 inch to 2-1/4 inch Tee Fitting - 3D Printed Dust Collection Fitting
- 4 inch to 2-1/4 inch Wye Splitter - 3D Printed Dust Collection Fitting
Reducers 5
Hose adapters 10
- 4 inch Corrugated Hose to 3 inch Smooth Duct Adapter
- 4 inch Corrugated Hose to 4 inch Smooth Duct Adapter
- 4 inch Corrugated Hose to 5 inch Smooth Duct Adapter
- 5 inch Corrugated Hose to 4 inch Smooth Duct Adapter
- 6 inch Corrugated Hose to 4 inch Smooth Duct Adapter
- 4 inch Wire Reinforced Hose to 3 inch Smooth Duct Adapter
Know your hose end better than your port? See what we build from the hose end.
What does 4 in. mean in dust collection?
4 inches is 101.6mm. Many shop dust collection systems use 4 in. main duct, the pipe that runs along a wall to the collector.
Branches step down from there to smaller hoses and machine ports. Pipe, hose and machine ports can all read differently from their names, so measure the part you will connect to.
Parts we print at 4 in.
We print 4 in. fittings, reducers and floor sweeps in PETG. The parts list on this page shows what is for sale at this size right now.
A reducer steps your 4 in. duct down to a smaller hose. Measure the smaller end too, and enter both numbers.
Questions about a 4 in. reading
What size adapter do I need for a 4 in. (101.6mm) port?
One built to your own reading. If your calipers show about 4 in. (101.6mm) across the part you connect to, enter that number in the builder and we print that end to it. Measure the other end too, so both ends are right.
Is 4 in. (101.6mm) the inside or the outside?
It depends on what you measured. If you measured across an opening, 4 in. (101.6mm) is the inside. If you measured across a stub that sticks out, it is the outside. Tell the builder which one you measured, and do not guess from a name on a listing.
How do I connect 4 in. duct to a smaller hose?
Use a reducer. A reducer steps 4 in. duct down to a smaller hose. Measure the smaller end with calipers too, since hose sizes vary by maker, and enter both numbers in the builder.
Can I find my tool on this page?
No. This page does not list tools. Port sizes change between makers and between models, and a tool name does not tell us what your port measures. Put calipers on your own port and enter that number.
Do I need clamps or tape?
Sometimes. We print each end to the number you enter, so a joint can push on snug. A joint that sees heavy use may still want a wrap of tape. Check the joint after your first few minutes of use.
Do you sell the design file?
No. We sell the finished part. Each adapter is printed to order in PETG and ships from the US.
