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I Forge Iron

Guillotine Butcher Tool Angle

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Depends on what you are cutting into, how wide your tools are, and how big the starting stock is.  I have a range of them, from around a 60* "cutting" angle to 30 to 40 deg. for my commonly worked stock sizes, and some in the 20* range for helping out deep impressions in larger stock (second operation) to prevent cold shuts. 

For example small stuff at the end of a bar can be made with steeper angles as the lack of resistance will allow the metal to squish out further in subsequent operations rather than flow back towards the shoulder with the possible result of cold shuts.  

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