Can I get 1-micron filtration for my dust collector?

Yes, you can achieve filtration down to 1 micron. To do this effectively, you need the correct fabric, surface treatment, and the proper Air-to-Cloth Ratio for your application.

  • The Recommended Material: For wood dust, we generally recommend Polyester Felt with a Singed Finish.
  • The “Dust Cake” Principle: Filtration efficiency actually improves over time. Initially, the felt filters the dust, building up a layer known as a “dust cake” on the singed surface. This cake then performs the actual filtration of subsequent fine dust.
  • Self-Cleaning: When the cake becomes too thick, the material naturally wants to clog (blind). However, the singed surface prevents the dust from adhering permanently, allowing the heavy cake to break away and fall into the collection bag, leaving a thin, effective layer behind to continue the process.

Why does my replacement filter bag need to be oversized?

The purpose of an oversized bag is to maintain the proper Air-to-Cloth Ratio (the amount of air passing through every square foot of filter media).

  • The OEM Flaw: Most manufacturers of single-stage units include the surface area of the bottom bag in their efficiency calculations.

  • The Reality: Once the bottom bag fills with sawdust, that surface area is blocked and can no longer filter air. This drastically reduces your ratio, causing backpressure and suction loss.

  • The Solution: An oversized top bag provides enough extra surface area to compensate for the loss of the bottom bag, ensuring consistent suction even as the collector fills up.

What is the difference between OEM standard bags and Polyester Felt?

There is a significant difference in filtration efficiency and airflow between standard factory bags and high-quality aftermarket felt.

  • OEM Standard (Polyester Sateen): Most factory-supplied bags are made of woven lightweight polyester sateen. These typically have a poor filtration rating of around 30 microns and offer lower airflow.

  • Standard Felt: While better than sateen, standard felt lacks surface treatment, causing dust and woodchips to stick to the fibers.

  • Singed Polyester Felt (Recommended): Our recommended bags use a singed surface treatment. This critical step burns off loose fibers, creating a smooth surface that promotes the “dust cake” buildup and release cycle. This allows the bag to essentially “clean itself,” preventing the permanent clogging common with standard OEM bags.