dust port sizes - Woodworking Talk

Dvoigt · 11-01-2009, 08:19 PM

What is typical size dust port on a hand held tool like a biscuit joiner or a orbital sander? I was thinking they are 1" but I don't see an easy way to step down from 4" to 1", not in one step or with out a large adapter.

How do you do it?

Michael H. · 11-01-2009, 08:46 PM

Depends on the tool brand. Some are 1", others are 1-1/4" or even metric. My PC biscuit joiner is 1" and my Bosch RAS is 19 mm.
Most brands will sell hoses and adapters for their tools. From the end of these hoses, you can step up to your 4" hose with adapters.
It is a little frustrating that there is no uniformity for hose sizes and adapters. So double check your diameters at the hose ends and get the right adapters from the get go.
I can't tell you how many various adapters I've collected for all my portable tools.

woodnthings · 11-01-2009, 08:50 PM

Not the dust collector. Shop Vac typical 2 1/2" then reduce to a house hold flex hose to 1 1/4" or there's a drywall dust collector with a 1 1/4" flex hose, then reduce to the port on the tool. Requires some ingenuity. Sometimes the ports are rectuangular, odd ball sizes etc. The flex hoses are lightweight and best for following the tool as you move it around.

bill

gregL · 11-02-2009, 01:28 AM

I have seen plastic reducers for dust hoses at the big box stores and at numerous woodworking web stores that can be cut at various step down sizes to get the required sizes.
If you are trying to step down from a 4 inch hose to a 1 inch port you probably will have way too much cfm from your 4 inch dust collector to go through a 1 inch port. I think it would be a big mismatch and too much backpressure could possibly harm your motor. You would need to open another port or blast gate to equalize the the pressure input/output.