Tag Archives: Field equipment

New Spirit Blind By Ameristep


The engineers at Ameristep have a habit of not leaving well enough alone. Their design for the most recent entry into the ground blind product line reflects some of the best ideas of the old with new technologies and materials to create a whole new product. Continue reading New Spirit Blind By Ameristep

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Hard As A Rockwell


The Rockwell hardness of any knife blade is the best indication of edge retention and sharpening ease.

The hardness of a knife blade is tested on a Rockwell Machine. The hardness read-out is indicated on the dial face at the top of the machine. Image: Durwood Hollis
The hardness of a knife blade is tested on a Rockwell Machine. The hardness read-out is indicated on the dial face at the top of the machine. Image: Durwood Hollis

In many of these columns you will see the phrase “Rockwell Hardness” when commenting on actual blade hardness. Invented by metallurgist Stanley P. Rockwell in 1919, the Rockwell Testing Instrument is able to determine the hardness of a wide range of materials, as well as many non-metallic materials. The instrument typically uses a cone-shaped diamond applied under pressure to penetrate the object tested. When a knife blade is tested, it is secured in a fixture and the diamond impressed into the blade under pressure. Initially, the first application of the diamond is used to establish a zero-reference point. Then, the diamond is applied Continue reading Hard As A Rockwell