ABRASIVE MEDIA

Sodium Bicarbonate, Walnut Shell, Glass Bead, Crushed Glass, Walnut Shell, Silicon Carbide, & Plastic Abrasive Media from Comco

ABRASIVE MEDIA AND APPLICATIONS LIST

A wide variety of materials can be used for abrasive blasting. Listed are products that Comco Inc. offer as a standard item. Specially graded materials can be ordered for fine tuning of processes. Call for further details !!

Abrasive Selection Guide

Aluminum Oxide is the most commonly used cutting abrasive. The shape and hardness of the particle make it an excellent choice when working with metals or hard, brittle parts. Common uses for aluminum oxide include cutting, deburring and the preparation of surfaces.

Aluminum Oxide is recommended for the following applications:

Cleaning ceramic substrates, Removal of inked markings, Component failure analysis, Removing bridging between traces, Cleaning magnesium oxide from thermocouples, Etching of heat-sensitive materials, Clean up of laser drilled holes, Texturing graphite surfaces, Silicon wafer beveling.

Particle Size Range 10 Micron, 17.5 Micron, 25 Micron, 50 Micron and 150 Microns
Particle Shape : Blocky & Sharp
Hardness (Mohs’) : 9

Crushed Glass is manufactured by crushing glass beads. The result is a mild abrasive media that’s used where only a light degree of abrading is desired.

Particle Size Range 50 Microns
Particle Shape : Blocky & Sharp
Hardness (Mohs’) : Between 5 and 6

Glass Bead is commonly used where the preservation of tight tolerances is critical combined with the need to relieve stresses. It is also used to perform light deburring or to apply a satin-like finish on the part. The spherical shape of the glass bead keep it from cutting into the surface of the part so it’s commonly used t relieve stresses by “pounding” the part’s surface.

Recommended for the following applications: For cosmetic use on component metal surfaces or board edges, Demarking plated components without damaging component finish

Available in "D" 50 micron (white)

Particle Size Range 35 micron and 50 Microns
Particle Shape : Spherical
Hardness (Mohs’) : 6

Plastic Media is obtained by grinding and carefully sizing recycled plastic. It has assize similar to that of walnut shell. Its size makes it an effective tool to deburr machined parts without causing dimensional changes. Plastic can also be used to remove conformal coatings

Recommended for the following applications: Deburring Delrin ® / Teflon® / nylon devices, Deflashing plastic connectors, Stripping wire insulation & Removing conformal coating

Particle Size Range 50 micron and 200 Microns
Particle Shape : Blocky
Hardness (Mohs’) : Between 2 and 4

Silicon Carbide is one of the most aggressive media used for micro-abrasive blasting. Its hardness is nearly that of diamond. This media is typically used only where very fast material removal is a requirement. Silicon carbide is an excellent abrasive for deburring stainless steel and titanium parts.

Recommended for the following applications: Cutting silicon wafers, Drilling holes in ceramic substrates, Deburring stainless steel parts & other hard material

Particle Size Range 20 and 50 Microns
Particle Shape : Blocky & Sharp
Hardness (Mohs’) : 9+

Sodium Bicarbonate is one of the softest abrasives available, but the particles’ needle-like or “monoclinic” shape makes it an excellent choice for abrading more pliable materials. The particles cut through soft surfaces where a blockier particle would tend to bounce off. It is commonly used to selectively remove coatings on circuit boards without damaging components.

Recommended for the following applications: Removing solder mask, Removal of inked markings on plastic materials, Removing conformal coating, Removal of epoxy on electronic test probe ID's, Deburring Delrin ® / Teflon® / nylon devices, Cleaning ceramic surfaces, Stripping wire insulation

Particle Size Range 50 Microns
Particle Shape : Monoclinic
Hardness (Mohs’) : Between 3 and 4

Walnut Shell is manufactured by grinding nut shells. It has a much larger size than sodium bicarbonate, but is also used to remove (polymer) coatings from circuit boards. It’s also used to deflash plastic parts.

Recommended for the following applications: Removing solder mask, Stripping wire insulation, Removing conformal coating, Removal of inked markings on plastic materials, Deburring Delrin ® / Teflon® / nylon devices

Particle Size Range 250 Microns
Particle Shape : Blocky
Hardness (Mohs’) : Between 3 and 4

Type	Size	Part Number	Quantity
Aluminum Oxide	10 Micron	PD1001-3	1.4 Kg / 3 lb Bottle
Aluminum Oxide	10 Micron	PD1001-25	11.3 Kg / 25 lb Box (5 bags)
Aluminum Oxide	17.5 Micron	PD1009-3	1.4 Kg / 3 lb Bottle
Aluminum Oxide	17.5 Micron	PD1009-25	11.3 Kg / 25 lb Box (5 bags)
Aluminum Oxide	25 Micron	PD1012-4	1.8 Kg / 4 lb Bottle
Aluminum Oxide	25 Micron	PD1012-25	11.3 Kg / 25 lb Box (5 bags)
Aluminum Oxide	25 Micron	PD1012-50	22.7 Kg / 50 lb Box (bulk carton)
Aluminum Oxide	50 Micron	PD1003-4	1.8 Kg / 4 lb Bottle
Aluminum Oxide	50 Micron	PD1003-25	11.3 Kg / 25 lb Box (5 bags)
Aluminum Oxide	50 Micron	PD1003-50	22.7 Kg / 50 lb Box (bulk carton)
Aluminum Oxide	100 Micron	PD1029-4	1.8 Kg / 4 lb Bottle
Aluminum Oxide	100 Micron	PD1029-25	11.3 Kg / 25 lb Box (5 bags)
Aluminum Oxide	100 Micron	PD1029-50	22.7 Kg / 50 lb Box (bulk carton)
Aluminum Oxide	150 Micron	PD1014-4	1.8 Kg / 4 lb Bottle
Aluminum Oxide	150 Micron	PD1014-25	11.3 Kg / 25 lb Box (5 bags)
Aluminum Oxide	150 Micron	PD1014-50	22.7 Kg / 50 lb Box (bulk carton)

Crushed Glass	50 Micron	PD1027-2	0.9 Kg / 2 lb Bottle
Crushed Glass	50 Micron	PD1027-25	11.3 Kg / 25 lb Box (5 bags)

Silicon Carbide	20 Micron	PD1005-3	1.4 Kg / 3 lb Bottle
Silicon Carbide	20 Micron	PD1005-25	11.3 Kg / 25 lb Box (5 bags)
Silicon Carbide	50 Micron	PD1006-4	1.6 Kg / 3.5 lb Bottle
Silicon Carbide	50 Micron	PD1006-25	11.3 Kg / 25 lb Box (5 bags)
Silicon Carbide	50 Micron	PD1006-50	22.7 Kg / 50 lb Box (bulk carton)

Glass Beads	35 Micron	PD1030-3	1.4 Kg / 3 lb Bottle
Glass Beads	35 Micron	PD1030-25	11.3 Kg / 25 lb Box (5 bags)
Glass Beads	50 Micron	PD1004-3	1.4 Kg / 3.5 lb Bottle
Glass Beads	50 Micron	PD1004-25	11.3 Kg / 25 lb Box (5 bags)
Glass Beads	50 Micron	PD1004-50	22.7 Kg / 50 lb Box (bulk carton)
Glass Beads	100 Micron	PD1033-3	1.4 Kg / 3 lb Bottle
Glass Beads	100 Micron	PD1033-25	11.3 Kg / 25 lb Box (5 bags)
Glass Beads	100 Micron	PD1033-50	22.7 Kg / 50 lb Box (bulk carton)

Plastic	50 Micron	PD1035-2	0.9 Kg / 2 lb Bottle
Plastic	200 Micron	PD1013-2	0.7 Kg / 1.5 lb Bottle
Plastic	200 Micron	PD1013-30	13.6 Kg / 30 lb Box (5 bags)

Pumice	50 Micron	PD1015-2	0.9 Kg / 2 lb Bottle

Sodium Bicarbonate	50 Micron	PD1007-3	1.1 Kg / 2.5 lb Bottle
Sodium Bicarbonate	50 Micron	PD1007-25	11.3 Kg / 25 lb Box (5 bags)
Sodium Bicarbonate	100 Micron	PD1031-3	1.1 Kg / 2.5 lb Bottle
Sodium Bicarbonate	100 Micron	PD1031-25	11.3 Kg / 25 lb Box (5 bags)

Walnut Shell	250 Micron	PD1008-2	0.7 Kg / 1.5 lb Bottle
Walnut Shell	250 Micron	PD1008-25	11.3 Kg / 25 lb Box (5 bags)

Different media types, sizes and quantities are available, the above list represents the most commonly used and ordered types and sizes.

Data Sheet on Media

Media Conversion Chart

18/01/2012 03:50