New Kitchen Knife Design

A new forged 1075 kitchen knife still in polish stage and a quick W1 weeding knife. You can see the sugha hamon at 80 grit before tempering.  Weeding knife is done with wet Rutland 2700 degree furnace cement straight into the forge 10 min soak at temperature, interrupted quench 3 seconds in 3 seconds out then […]

Various Collins Machetes

See attached In order from bottom to top are: Collins 128 Guatemala Collins 128 USA circa 1940’s Collins 128 with concealed tang circa 1920-1930 Collins MKII lightweight guatemala circa 1965 one of the last originals Collins USN MKII 1945 stamp Collins MKII could be WWII but it is a Colombian blade, has period sheath. GTK […]

Collins 128 Guatemala compared to a similar sized Dha

The attached drawing shows a large Dha compared to a reshaped Collins 128 Guatemala circa 1960-1965. I decided to recut the collins spine and angle the blade into a more forward sweep. The machete is designed to cut and slice brush and saplings not as a weapon and is used mainly as an agricultural implement although […]

Tracing of a 20″ Dha

The attached photos and drawing is a tracing of a 20″ (19.75 actual) burmese dha. These are a similar type of general purpose implements to machetes but are usually much lighter in weight. I could go on at length about this subject because I was trying to figure out how to get the maximum rotational speed in […]

Impulse Momentum Transfer

I borrowed a equation to calculate how much impact a tool of any kind has to try and figure out how strong to make a blade to trim some really tall hedges, similar to a California Pepper Tree, but in a hedge form. The results were interesting from a strength of materials standpoint.  If the math […]

Notes about steel: Solingen Steel

A academic paper regarding solingen steel from: http://www.academia.edu/319632/A_contribution_to_the_understanding_of_Solingen_steel_in_the_19th.century originally published by http://www.hanser-elibrary.com/loi/pm 110093_Dietz If the copyright holder does not want this posted here please let the website admin know and it will be removed immediately.