Technical Specifications & SDS

Grit-O'Cobs Bags

Produced from a renewable resource and grown by American farmers in the heartland of America, Andersons Cob Products have been the professional user’s preferred choice since 1957.

For an introduction to corncob, including information on the drying, milling and packaging process flow, download the PDF.



Breakdown Rates
The percent breakdown of media to a -30 mesh size after blasting at 90 psi against a steel plate six inches from a 3/16″ blasting orifice.

Media Breakdown
#4 Steel Grit 0%
Grit-O’Cobs 1014 Grade 12%
Walnut Shells 14%
Aluminum Oxide 24%
#4 Glass Beads 35%
#7 Dry Steel Sand 79%



Mohs Hardness
The relative hardness of selected materials can be seen in the following table.

Material Mohs Hardness
Aluminum 2.0 – 2.9
Copper 2.5 – 3.0
Walnut Shells 3.0 – 4.0
Brass 3.0 – 4.0
Grit-O’Cobs 4.5
Iron 4.0 – 5.0
Glass 4.5 – 6.5
Glass Beads 4.5 – 6.5
Silica Sand 7.0
Aluminum Oxide 9.2
Diamond 10.0