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I recently bought a Dewalt Model #DWE7491RS table saw and it has a 2-1/2" dust port (2-1/4" inner diameter). I also have a small size Shop Vac that has a hose with a plastic nozzle at the end that has a 1-1/4" diameter (1" inner diameter).

For the life of me I cannot figure out how to connect the table saw dust port to my shop vac. I have looked and looked and looked online and I can't find any adapters that will fit. I have found some 2-1/2" hard plastic adapters, but they are exactly the same size as the table saw dust port so they don't work. I either need something a little larger to fit over the table saw dust port or a little smaller to fit inside it. This is driving me crazy. I feel like with a popular table saw like the Dewalt this shouldn't be that difficult. Anyone have any ideas for how I can accomplish this?

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    I don't want to be a buzzkill, but you run the risk of clogging your little hose pretty quickly. Look into the cyclone bucket idea: it still won't be great, but will improve your life a little... Aug 26 at 0:41
  • Yeah I was wondering if I need to buy a larger shop vac. Aug 26 at 0:50
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    You (probably) don't need to buy anything new. Always repurpose what you have first. The recommendation is to make a nearly free cyclone bucket and put that in the line before the vacuum. Instructions for DIY cyclone buckets are ubiquitous on the internet, and there may even be one here. In fact, that would make an excellent Question if you have a particular free bucket and want to see how others might put it to use as a separator (and one does not already exist).
    – jdv
    Aug 26 at 15:25
  • Also, you might want to check out woodworking.stackexchange.com/q/10582/5572 My guess is that DeWalt is in the process of not-quite-voluntarily replacing these models because they might pose a risk of flinging blades off the arbor.
    – jdv
    Aug 26 at 15:28
  • @jdv is DeWalt actually recalling them? If you've got a link, it would improve that otherwise already excellent answer.
    – FreeMan
    Aug 26 at 17:07
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You would use this type of adapter which you can obtain from any of the big box stores in the shop vac department. This adapter kit handles 2 1/2, 1 7/8, and 1/1/4 hoses.

This link for adapter

Pictures from Home Depot:

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If you don't want to use the 2 1/2" hose first, you can attach the adapter with this rubber coupling. If it is a tight fit, just heat the rubber first with a hot air gun. Do one end at a time, wear gloves

Picture from Rockler website:

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    That one won’t work. The problem is that the 2-1/2” adapter is EXACTLY the same size as the dust port. It’s not big enough to fit over the dust port and it’s too big to slide in to the dust port Aug 26 at 0:49
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    You use the 2 1/2 Hose to connect first to the DeWalt, then use the adapter to reduce down to the size you want. Aug 26 at 1:50
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    @CoreyBurnett Starting at the saw, connect part #3, then #1, then #2, then the shop vac hose.
    – FreeMan
    Aug 26 at 11:11
  • In short, all of these fittings are somewhat standard, and all you need is the right male-female fittings.
    – jdv
    Aug 26 at 15:22
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Thanks to some of the comments I figured out the solution. I was thinking about this wrong! I was looking for a hard plastic adapter that would go right on the dust port of the table saw. After reading the comments I realized what I needed to do was attach a hose to the dust port FIRST, then attach adapters to the hose. Today I bought a universal kit that included 2-1/2" hose and some adapters and it worked perfectly! Thanks so much. I knew I was just not thinking about this the right way.

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  • This is what I stated in my comment to use the hose first. Aug 27 at 6:47
  • @Programmer66: "Thanks to some of the comments I figured out the solution." so I'd guess he read your comment, too. ;) Also, I'm not sure this would have worked had he not picked up a 2nd section of hose, he'd have just translated the problem to the shop vac end of the setup.
    – FreeMan
    Aug 27 at 11:49

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