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Picture of Thien Baffle Dust Extractor With Quick Change Bucket

This project is inspired by Hector Acevedo's tiltable shopvac dust collector.

https://woodgears.ca/reader/hector/shopvac.html

Instead of tilting the top section, my design incorporates Matthias Wandel's foot lever idea for a quick and easy bucket release:

https://woodgears.ca/dust_collector/separator.html

The Thien Baffle was invented and patented by J. P. Thien: http://www.jpthien.com/cy.htm and it works amazingly well. It's big advantage is that it occupies a fraction of the space needed for a large dust collector or a conical cyclone.

Why Build it?

If you have ever tried collecting dust and shavings from woodworking equipment with a traditional vacuum cleaner or a shop vac, you know it is a losing battle because the filters block up too quickly.
This dust collector was made to collect the dust from a small band saw and a bobbin sander at my local men's shed. Both these machines have 40mm dust outlets on them, which should be within the capability of this dust collector.

It is obvious that a small – bore extractor like this can't handle machines with 100mm output pipes, eg. A Planer thicknesser or a big table saw, which need purpose built dust extractors.

The quick and easy removal and installation of the waste bucket is a huge bonus.

Step 1: Parts List:

1 round vacuum cleaner. If it is bagless like a shopvac, so much the better. (Mine wasn't)

1 plastic bucket for the Thien Baffle diameter 300mm, height 300mm (eg. a paint or tile glue bucket )

1 Strong plastic bucket 300mm dia x 400mm high to catch the dust

chipboard 20mm thick x 390 x 390 to create a surround for the dust receiver bucket

chipboard 16mm thick x 390 x 390 mm OR scraps of wood 210mm long x 16mm thick x 70mm wide to make a surround for the bucket
15mm plywood 390 x 390 for the baffle. (6mm thick would be fine)

300 mm dia circle of 10mm mdf with a 50mm hole in the centre (goes under the vacuum cleaner)

300mm dia circle of 16mm chipboard with a 50mm hole in the centre for the top of the Thien Baffle.

1 x 150mm pvc pipe 45mm OD (internal tube)

1 x 150 mm pvc pipe 60mm OD. (Inlet tube)

Wood to make the support for the inlet to the Thien Baffle

1 x radiata pine 100 x 200 x 20 (this is the block for the internal bag holder)

sheet metal 0.4mm x 120 x 170 bent to fit the vacuum cleaner bag

3.4 metres (11 feet) radiata pine, 70mm x 20mm

1 metre (39”) radiata pine 40mm x 20mm

2 x 70 x 50 x 38mm blocks for the front legs.

2 x 180 mm diameter wheels with through bolts (salvaged off an old barbecue)

6 x 10mm ID washers & 2 x 5mm spacers for the wheels

1 x 70 mm hinge.

1 metre of adhesive foam draft excluder 12mm wide.

Wood screws

PVA glue

Silicon sealant.

1 x Spring 220mm long x 20mm dia, 10g wire thickness

2 x 6mm eyebolts 60mm long with nuts and washers.

2 x 6mm x 40mm bolts with wingnuts, & washers