Festool RO 90 DX FEQ Delta Sander Dust Port Size and Vacuum Adapter Guide (571830)
Festool RO 90 DX FEQ 3-1/2 in. Delta Sander
Specifications
Festool RO 90 DX FEQ Delta Sander Dust Port Size and Vacuum Adapter Guide (571830)
The Festool RO 90 DX FEQ is a small delta sander. The model number is 571830. It gets into corners and tight spots that a round sander cannot reach. Like all sanders, it makes very fine dust that hangs in the air.
The sander has a round dust port on the side. The inside is about 27 mm, the Festool 27 mm standard. Measure your own port to confirm before you buy. Festool tools use a 27 mm hose, but most shop vacs do not. A GulpDust PETG adapter fits the port and steps it to the shop vac hose you already own.
Festool 571830 Dust Port and Specs
Port size: please measure to confirm
Source verified, but only one side of the port was confirmed. Measure your port before you buy.
Source we cite: www.festoolusa.com
| Dust port inner diameter | 27.0mm (measure to confirm) |
| Port shape | Round |
| Port location | Side |
| Connection type | Plug-it |
| Max speed | 15,000 RPM |
| Weight | 2.4 lbs |
Festool RO 90 DX Dust Port Size: About 27 mm Inside, Round
The dust port on the RO 90 DX is round. The inside is about 27 mm, the Festool 27 mm standard. Treat that as a close guide, not a hard spec, and measure your own port to confirm before you buy.
Festool builds its tools and hoses around the 27 mm size. Normal shop vacs do not. If you own a Festool extractor with a 27 mm hose, it plugs right in. The trouble starts when you want to use a normal shop vac.
Most shop vac hoses are 1-7/8 inch or 2-1/2 inch. They are way too big for a 27 mm port. A GulpDust adapter matches the sander port on one end and your bigger vac hose on the other end, so you get a clean seal.
How to Measure Your Festool RO 90 DX Dust Port
Slide the inside jaws of a caliper into the port and open them out until they touch the inner wall. That gives you the inner diameter. The inner is what the adapter slides into.
Festool tools are built around 27 mm, so your reading should land near 27 mm. Write down what you measure and order the adapter to match.
How to Connect a Shop Vac to the Festool RO 90 DX Delta Sander
Clear any dust out of the side port first. A clean port gives the best seal.
Press the small end of the PETG adapter into the port. It is a friction fit, so it holds with a firm push. Then press your shop vac hose onto the wide end of the adapter.
Turn the vac on before you start sanding. Dust collection on a sander is not just about a clean bench. Fine sanding dust is the kind that hangs in the air and gets into your lungs.
Why Dust Collection Matters on a Delta Sander
A delta sander makes very fine dust. That dust floats. It does not fall to the floor like saw chips do.
Pulling that dust at the port keeps it out of the air. It also keeps the pad clean, which helps your sandpaper last longer and cut better.
For the smoothest finish, run a steady vac while you sand. A variable speed extractor is nice, but any shop vac with the right adapter does the main job.
Festool 571830 Dust Collection FAQ
What size is the dust port on the Festool RO 90 DX?+
The port is round and about 27 mm on the inside, the Festool 27 mm standard. The outer size is not confirmed for this exact model, so measure your own port with calipers before you buy.
Can I use a non-Festool shop vac with the RO 90 DX?+
Yes, with an adapter. Festool hoses are about 27 mm, but most shop vac hoses are much larger. The GulpDust PETG adapter fits the sander port on one end and your vac hose on the other.
Do I need clamps to attach the adapter?+
No. The adapter is a friction fit. You push it into the port and it holds. The vac hose end works the same way.
Why does the RO 90 DX need dust collection so much?+
Sanders make very fine dust that floats in the air. That dust is the kind that is bad to breathe. Pulling it at the port keeps the air clean and helps the sandpaper last longer.
Can I print this adapter myself?+
Yes. You can buy the printed PETG part shipped from the US, or download the STL file and print it at home. We suggest PETG with 3 walls and 25 percent infill.
Does the same adapter fit other Festool tools?+
Often yes. Festool builds around the 27 mm port across the line, like the ETS 125 EQ sander and the TS 55 track saw. The OF 1010 router uses an oval port, so it is different. Check each tool page and measure before you buy.
Related Guides
Drywall Sander With Vacuum Setup: Pole Sander Dust Collection Adapters for Festool, DeWalt, and Milwaukee
Drywall dust is fine, fast, and bad for your lungs. The right sander plus the right shop vac plus the adapter that connects them keeps it out of the air. This guide covers the Festool Planex, DeWalt DCE800, Milwaukee 2830, and the PETG adapter that fits the hose to your vac.
9 min read
Festool CT 26 vs CT 36: Which Extractor Is Right for Your Shop?
The CT 26 and CT 36 are Festool's mid-range and large extractors. Here is how they compare and which size is worth the upgrade.
4 min read
Festool CT Mini vs CT Midi: Which Dust Extractor Should You Buy?
The CT Mini and CT Midi are Festool's most popular dust extractors. Here is exactly how they compare and which one fits your shop.
5 min read
Track Saw Dust Collection: DeWalt, Makita, and Festool Guide
Track saws collect dust better than any other circular saw. But the port size and adapter you need depends on the brand. Here is the complete guide.
5 min read