Routing is one of the messiest operations in woodworking. A router spinning at 20,000 RPM flings chips and fine dust in all directions. Most of the dust goes sideways or up, not down into a vacuum port. This makes routing harder to contain than sawing or sanding.
A good dust collection setup for a router table has three parts: an above-table fence port, a below-table bit guard with a port, and a dust shoe or bit guard for handheld routing. Get all three and you can capture most of the dust at the source.
Above-Table Dust Collection
Most router table fences have a built-in dust port on the back of the fence. This port connects to a shop vac or dust extractor via a short hose. The suction pulls chips and dust through the fence opening as you feed the workpiece.
Fence port sizes vary by maker. Incra, Jessem, Kreg and the generic bench-top fences do not all land on the same one. Every size we cover has a page on the port size hubs. The adapter connects your fence port to your vacuum hose.
Below-Table Dust Collection
The fence port does not capture dust thrown down into the router box. That dust settles into the table housing and comes out when you move things. A below-table port on the router housing or on the bit guard captures this second category.
Most router lifts (JessEM, Woodpeckers, Kreg) have a port on the housing below the insert plate, and it is usually the size on the 2-1/2 in. port hub. Connect a short flexible hose from that port to a Y-fitting, then run one line to your shop vac. The Y-fitting lets you run above and below at the same time.
Bit Guard with Dust Port
A bit guard is a clear plastic or polycarbonate shield that covers the bit area during routing. Several manufacturers make guards with a dust port built in. These sit directly over the bit and pull the chips and dust right off the cut.
Rockler and Jessem both make bit guards with integral dust ports. They are one of the most effective single upgrades you can make to a router table dust collection setup.
For Handheld Routing
Handheld routers use a dust shroud or base adapter. This is a ring that attaches around the router base and wraps around the bit opening. It includes a port for a hose.
Festool and Bosch both make routers with integrated dust extraction bases. Aftermarket shrouds are available for most router brands. Port sizes change with the brand. Festool, Bosch, DeWalt and Makita each land on a different one, and every size we cover has a page on the port size hubs.
Hose Management for Router Tables
Running two hoses off one shop vac requires a splitter or Y-fitting. The 2-1/2 inch Y-fitting is the most common. Use a blast gate on each leg so you can close off the below-table port when you open the above-table port and vice versa.
Blast gates are simple inline valves made of plastic or metal. A 2-1/2 inch blast gate costs about $8. They preserve suction by directing all vacuum flow to one port at a time instead of splitting it between two.
Expected Results
With fence port plus bit guard running simultaneously:
- Horizontal chips: caught well at the fence
- Fine dust thrown up: caught by the bit guard
- Below-table dust: caught by the housing port
You will still need to wipe down the table surface after routing. But the pile on the floor and the cloud in the air both drop dramatically with all three collection points running.
Adapter Summary
Most router table systems use 2-1/2 inch or 4 inch main duct. Shop vac hoses are 1-1/4 inch or 1-7/8 inch. You likely need:
- A reducer from your fence port size to your vac hose size
- A Y-fitting or blast gate assembly
- A shroud or base adapter for the router itself if doing handheld work
Use our configurator to find adapters for your specific router brand and your vacuum hose size.