Thread: Adaptor for 100mm dust outlet

Method 1. Using a WW lathe
Glue up a 50+ mm thick sandwich out of 3+ layers of18 mm thick layers of MDF and turn up an adapter that is 100 mm ID on one side and 103.5 on the other.

Method 2.
Cut a 300 mm length of 100 mm PVC ducting.
The difference in the circumference between the 100 and 103.5 mm diameter ducting is ~11mm
Cut 50 mm long slots into one end of the 300 mm length of ducting using a band saw so as to symmetrically remove 11 mm of circumference.
clamp down over the 100 mm duct and glue hoop of 103.5 PVC around reduced size duct.

Method 3
Turn up a 100 mm long by 200 mm OD timber blank
Take a 500 mm length of 103.5 PVC duct.
Drill two holes across the pipe about 25 mm from each end.
Firmly suspend PVC vertically via 2 holes at one end so that the PVC can be easily spun around
Suspend weights to the bottom via the two holes at the other
Suspend 200 mm blank half way inside the PVC tube,
Spin PVC tube while applying air gun to the middle of the tube
Add extra weight to stretch the tube till it fits neatly over the blank.
Cut in half and knock out blank and you should get two adapters in one go.

Many thanks for this very comprehensive reply, BobL.

A variation of your Number 2 is my method of choice, cutting off a 40 mm length of 100mm PVC tube, then cutting it longitudinally in two places to take 11mm out of the circumference, then regluing it with blue PVC cement, after filing both sides so the join is a true butt joint. Except that 100 mm PVC is 4mm thick, so the minimum you will get when wrapped around the 100 mm outlet is 108mm, but that can be turned down on a lathe if I make the join strong enough and clamp it to a 100mm internal liner, if I can find something suitable with a 100 mm OD

Thanks again for these great ideas

Well, I tried turning down a piece of PVC on a metalworking lathe, but it was not successful. The three teeth on the jaws distorts the PVC tubing into a triangular shape.

But the answer was staring me in the face all the time.

My standard dust collection arrangement is for my 4" hoses to be permanently connected to a clay pipe adapter fitting from Tradelink, the hose clamped over one end, the other end has a 110 mm OD which will fit into the standard 110mm ID flared end of a 4" PVC pipe or inline joint, or bend fitting. You can see from the pic below how my cyclone is made with standard PVC bends, and the Tradelink fitting with 110mm OD slip neatly into these.

For the 100mm dust outlet on my new Jet 10/20 drum sander, it was a simple matter of fitting a 4" flange over this and screwing it to the cover plate of the drum, and then filling the space between the outlet and the flange with silastic, and then immediately press fitting in this flange a standard 100mm 45 degree bend fitting from Bunnings ( part # 46150) . I then fixed this in position with a couple of screws so the fitting would not pull it out.

QED ( quod erat demonstrandum , or Quite Easily Done)

An interesting thing is that this Jet drum sander, supposedly known for its high quality products, actually has a very flimsy plastic injection moulded cover over the rear of the revolving sanding drum, with the dust outlet part of the moulding. The cover is meant to hold the weight of the hose pulling down on it. This cover is only fixed to the steel frame in three places, hence the temporary clamp in the photo below where I added some silastic to give a better support . Pretty poor design. Also, the dust outlet is straight above the outlet table, and therefore so is the hose, resting on the outfeed table if you don't suspend the hose from the roof

cyclone_09.jpgto
My standard female fittings for my standard hose attachment

P1150382 (Large).jpg P1150378 (Large).jpg
Female fitting attached to rear plastic cover plate via flange screwed to cover plate.
Injection moulded dust outlet can be seen inside



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