The Machine That Started It All

The “MicroBlaster” has come a long way from its debut in 1968, but it’s still the reliable blaster our customers can expect to keep running year after year. It’s tough enough to perform in high-volume production environments, but versatile and affordable enough for shops or hobbyists just blasting a few days a week.

Our latest “MicroBlaster”, the AccuFlo®, is the result of over 50 years of blasting design evolution.

Simple but Effective

The “MicroBlasting” was designed around a novel mechanism for mixing air and abrasive. Rather than using an inaccurate venturi or trying to shake a whole tank of abrasive, our engineers created a system that pulses the air inside the tank. The modulator is a precision electro-mechanical valve that opens and closes 60 times per second.


When the modulator opens, pressure builds in the mixing chamber. This high pressure forces air through the orifice and into the tank, fluidizing a small amount of abrasive.


When the modulator closes, pressure drops in the mixing chamber. High air pressure at the top of the tank pushes the fluidized abrasive into the mixing chamber and out toward the nozzle. Each pulse carries a small, but accurately metered amount of abrasive. The distance between the mixing chamber and the nozzle allows time and space for the abrasive and air to mix uniformly.

Don’t Wash a Teacup with a Fire Hose

Working with small, delicate parts requires smaller tools and greater control. Unlike large cabinet blasters, Comco’s micro-abrasive blasters are designed for precision work.

  • Our modulator feed creates a uniform abrasive stream.
  • Our pinch-valve provides crisp on/off control.
  • Our lightweight handpiece improves operator dexterity.
  • Our Hi/Performance nozzles focus the abrasive stream for pinpoint accuracy.

Combined, these features enable the “MicroBlaster” to target specific areas, improve yield and reduce time-consuming masking.

Nozzle size comparison: MicroBlaster nozzle (L) vs. sandblasting nozzle
The pinpoint focused abrasive stream from a “MicroBlaster” can cut detailed patterns into delicate objects.

Ideal for Multi-Tasking

Comco introduced the Dual Tank MicroBlaster® Model MB1002 for applications that require a two-step process. An operator can alternate between two different abrasives with the quick flip of a switch. The system runs on a common air supply, but each isolated tank has its own modulator and handpiece to prevent potential cross-contamination.

Selectively cleaning dental crowns and bridges

  • Aluminum Oxide quickly removes bulk casting materials, but switch to Glass Bead abrasive at the end of the process to avoid damage to the crown.
  • Glass Bead is slower at removing the investment casting, but soft enough to prevent damage to the surface of the crown.

Precision deburring of aerospace components

  • Aluminum Oxide quickly strips fine burrs that form on the machined surface of a manifold and leaves a matte finish.
  • Switch to Glass Bead abrasive to restore a satin finish on the surface.

Conformal coating removal on circuit boards

  • Walnut Shell removes acrylic coatings.
  • Switch to Plastic Media to remove epoxy, silicone or parylene coatings.

50 Years of Comco Engineering Innovation

From the time that we first released the MicroBlaster, Comco has delivered unequaled performance, reliability and precision.  Our commitment to design excellence and customer satisfaction are evident in the advancements made to our MicroBlaster over the years.

  • The MicroBlaster now comes standard with a flow path that is lined with stainless steel and carbide to reduce wear.
  • Our tank plumbing improvements ensure a more consistent abrasive stream at blast activation.


Each MicroBlaster comes equipped with the following design features:

  • Quick Fill design to add abrasive in a matter of seconds.
  • Quicknuts and hardened fittings for easy maintenance and longer life.
  • Autovent allows the unit to depressurize automatically when it is turned off.  This keeps abrasive from migrating back through the system preventing wear.





It Just Works

When Tom Deméré Ph.D., first arrived at the San Diego Natural History Museum in the fall of 1978, the Department of Paleontology had in use this Comco MB100 MicroBlaster.  That blaster, originally built in 1970 continues to serve them.  Tom remarked:

“At the San Diego Natural History Museum, old Comco MicroBlasters don’t die. They just go into semi-retirement for occasional use when the current Comco workhorse is tied up and our fossil preparation laboratory is so full of workers that another MicroBlaster work station is needed. 


At forty-two years and counting, the MB100 MicroBlaster is a testament to Comco’s product longevity. During that time Comco’s engineers have been continuously improving upon the original MicroBlaster. The AccuFlo is a machine they’ll be counting on for the next forty, and then some.

San Diego Natural History Museum
1978, MB-100 MicroBlaster

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