I just finished installing a basic dust collection system inside my mobile workbench, so in this video, I’ll demonstrate how I added a built-in downdraft sanding station that can easily be capped for more workspace when not in use. To create it, I’m installing a box with a pegboard on top to allow sawdust to filter down and an opening below to attach a hose to my shop vac.
For the cut list, tools, and materials needed for this project, scroll down to the bottom of this page.
Steps for Adding a Downdraft Sanding Table to a Workbench
- To get started, I first marked the cutout on my work surface. Next, I set the depth of my circular saw blade and used a straightedge to guide my saw along the lines. I used a plunge cut to cut the back line and a handsaw to finish at the corners.
- With my opening sized, I cut the sides of the box, so that edges will run half under the edges of the work surface to create a lip for the cutout to rest back in place as a cap.
- Using glue and screws, I assembled the box frame.
- Next, I marked the perimeter of the box on a scrap piece of ¼-inch plywood. I size the base and then installed it with glue and nails.
- Then, I used my vacuum attachment to size an opening on the underside of the box. I used my drill to cut the ends of the opening and a jigsaw to remove the rest.
- I drilled holes through the corners of the attachment and the box and dry-fit the installation with bolts and nuts.
- Though it wasn’t necessary, I decided to attach some scrap ¼-inch plywood strips and angled wings inside the box to divert the sawdust to the port and lessen the open area inside the box to create more suction.
- I then added the support strips around the top to hold the pegboard. As an optional step, I sealed all my joints with caulk including around the hole on the underside of the box before permanently securing the vac port. Note: When sizing the pegboard, you want a tight fit so that air doesn’t leak out around the edges, but removable in case you lose suction and need to clean out the box. I made a few trims with my table saw and then dry-fit the pegboard in place.
- Now it was time to install the box in my mobile workbench. To do this, I added some 2×4 supports along the side and back of the opening using pocket holes. I prepped the inside edge of the box with pilot holes and screws and then positioned the box and sunk the screws into the supports and sidewall.
- While the doors were off, I attached the fittings to accept my vac hose and tested out the suction.
- With the doors back on, I can put the cap in place and conceal my new downdraft sanding table.
To see the other customizations I made to this bench, click the links below this video:
- ¾” Plywood sides – 2 @ 15 ½ inches
- ¾” Plywood front and back – 2 @ 25 ½ inches
- ¼” Plywood base – 1 @ 25 ½” W x 17” D
- ¼” Plywood wings – 2 @ 15 ½” W x 11” D
- ¼” Pegboard – 1 @ 15 ½” D x 24” W
- ¼ x ¾” Lattice – 4 @ 15 ½ inches
- ¼ x ¾” Lattice – 2 @ 23 ½ inches
- 2×4 Support – 1 @ 17 inches
- 2×4 Support – 1 @ 25 ½ inches