When developing a roll cage for your race car or offroad 4x4, you are required to join round tubes. When a tube is properly notched it will fit against the adjoining tube with the maximum amount of surface area. This spreads the load and allows the weld joint to be as strong as possible.
The process of preparing the tubes for welding, cutting of the fitment
is referred to as notching or fishmouthing.
Notching can be done in a number of different ways, and some methods are easier than others. The amount of time spent and the quality yielded,
is greatly affected by the tooling used to make the notch.
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