How to Build and Attach a Dust Bag for Your Miter Saw

What You'll Need
4 by 6 inch tight-knitted canvas or synthetic material bag
A needle and thread or a sewing machine
A flexible measuring tape
Industrial strength glue
2 inches of plastic cylinder tubing (fitting to miter attachment)
2 inches of plastic cylinder tubing (fitted to smaller tube)
Small clamp (optional)
O-ring (optional)

A miter saw is a big convenience in home improvement, but it can make a big mess. Many newer saws already come with dust bags, but if yours is not, here’s how to build one and fit it to your miter saw.

Step 1 - Measure Your Miter

On the back of the blade guard, your miter saw has a vent for the dust. Measure your first tube fitting to this vent. If it is inverted, make sure it fits snuggly inside. If it is protruded than fit it over it so that it stays in place. Make sure the fitting is not too tight. You will need to be able to remove the dust bag to empty it.

Once you have the size of the smaller 2 inch tube, use that measurement to determine the size of the larger one. It should fit the smaller one easily inside with very little gap.

Step 2 - In the Bag

Measure your bag down 2 inches from the opening and mark your measurements with chalk. If it has a hem at the top, tear it out. Lay it flat and measure the center of the open end to interior width of your larger tube. Extend this measurement down 1 inch and then taper it to the edges of the bag in the second inch. Your bag will resemble a bottle.

Sew along the chalk lines with tight stitches, whether you’re using a needle and thread or a sewing machine. Cut off excess material with scissors.

Step 3 - Fitting in

Assemble your pieces dry to ensure everything fits correctly. Slip the open part of your bag into the larger tube and then secure it in place by fitting the smaller tube in, holding the 1 inch end of your bag between the two. Check the assembled dust bag against the vent to make sure it all fits into place.

Step 4 - Secure Your Creation

Using the glue, carefully apply a line on the inside of the larger tube and the outside of the smaller. Once again, slide in the open part of the bag and secure it between the 2 tubes. If the fit is not as snug as you would like, use a clamp to hold the tubes together until everything is properly sealed. When it is all dry, go ahead and give it a test run. If you find the bag has a tendency to slide off the miter saw while you work, use an "O" ring to secure it into place.

With these 4 simple steps you can get back to work, and with your new dust bag in place, you can be confident that the miter saw work you do now, won’t make as much clean up work later.