Optimal file cut for large blades

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Apr 14, 2012
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This is a luxurious problem. I have scored a 9 feet of hi-end 01 (uddeholm Arne) in an ideal dimension for big chopper knives. And I have weaseled my self into a well-stocked German tool import company in the next town over. So I can pretty much get any DIN file I want for retail price.

The files I'm thinking about are standard bastard files. They have 10, 12 and 14 inches. And 1 course to 3 fine in the flat bastard selection. They also have 12 inch extra course (0) and milled extra extra course but these cost six times as much.

I have been using their 12 inch course (1) as my stock remover on smaller knives. I've noticed that horse shoe files and rasps are to corse and tend to slide over the knife rather than digging in.

Now I want to step my file game up to match the task at hand. I'm thinking about buying six 14 inch course (1).

What are your thoughts on file choice for removing large quantities of tool steel.
 
A large ( 14") flat bastard is best used to draw file , and will do a lot of metal removal. A double cut fie will cut even faster and a bit smoother.
Follow that with a 12" "second" cut.
 
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