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A Frustrating Little Project

Discussion in 'Fixed Blades' started by Ryan Ladurantaye, Jun 9, 2016.

  1. Ryan Ladurantaye

    Ryan Ladurantaye Active Member

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    So this little knife has taken much longer than anticipated. Stated out moving along nice and quick. Until I got to the saw blade design the customer wanted cut into the spine....... Not going to be doing this again for quite some time. Round one..... I filed the teeth in by hand. Didn't turn out too bad. The knife is made from O1 and the heat treat went well aside from a little warp. Nothing major.
    [​IMG]
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    But then I found a weak spot

    [​IMG]

    So.... Then it was time to start over.
    This time, grinding the teeth in after heat treat.
    [​IMG]
    [​IMG]

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    Initially I thought I could file them in but the O1 seemed to have some hard spots mixed in the files wouldn't keep biting.

    So I made a little jig. I'll let you know how it turns out.
    [​IMG]
     
  2. John Noon

    John Noon Well-Known Member

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    I used a chainsaw file to put a choil in a knife made with 01 after tempering, very challenging and actually thought it wouldn't work with the fight the blade put up.
     
  3. dancom

    dancom Dust Maker Best Shop Tool

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    Love the shape! Did you etch before grinding or is that black from heat treat?

    Dan
     
  4. Ryan Ladurantaye

    Ryan Ladurantaye Active Member

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    That's black from the heat treat. I'm going to give it an etch before it goes though. I really like the shape too, it was inspired by some of Murray Carter's knives.
     
  5. Jim T

    Jim T Active Member

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    Really nice looking grind on the blade. I'm eager to see if your jig does the job you want on the saw teeth.
     
  6. Ryan Ladurantaye

    Ryan Ladurantaye Active Member

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    The little jig is working. Not as much accuracy as I wanted but that is due to a little bit of play. This will definately work well if I built a unit that's more solid.
     
    dancom likes this.
  7. Big Bear

    Big Bear New Member

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    That's looking great. As a total beginner I find myself constantly questioning whether a certain operation would be best done before or after heat treating. On my first knife I realized that there was no way I would be able to finish the bevels with a file after heat treat. Seems like if you want to shape it after, you need a grinder to do it.
    Anyway, looking forward to seeing the finished product.
     
  8. Ryan Ladurantaye

    Ryan Ladurantaye Active Member

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    When I first did it I filed them in by hand. But I think the sharp corners created stress lines during heat treat. So all it took was some pressure in the right spot then snap. So round two was grind after heat treat. Just have to go slow because I don't want to ruin the HT and temper.
     
  9. Foster J

    Foster J Active Member

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    I like the way this blade looks without the teeth. Nice design.
     
  10. Icho-

    Icho- Staff Member

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    I totally agree.
     
  11. Ryan Ladurantaye

    Ryan Ladurantaye Active Member

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    Well here's some progress. Teeth ground in. Now it's time for clean up. And I agree with everyone. I like this profile without the teeth. But I do like how they challenged me to think of new ways to do things.

    [​IMG]
     
  12. dancom

    dancom Dust Maker Best Shop Tool

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    Looks like the Dremel jig worked good! I like it with the teeth. Not sure if they add any functionality, but they score coolness points for sure. :beer:
     
  13. Ryan Ladurantaye

    Ryan Ladurantaye Active Member

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    Nothing functional about those. If you want a saw.....get a saw! They'd make one hell of a wound Chanel on exit if used on something though.
     
  14. Ryan Ladurantaye

    Ryan Ladurantaye Active Member

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    Here are a couple shots of this little thing out if the etch. I'll post the final pics later once the sheath is done.
    [​IMG]

    [​IMG]
     
    Last edited: Jun 21, 2016
    SoberEdge and dancom like this.
  15. John Noon

    John Noon Well-Known Member

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    Some time back in the seventies I believe it was a search and rescue tech watched a family perish in an aircraft while he tried cutting his way into the fuselage. After that he had a knife maker make him a knife with a saw back as above for cutting aluminum sheet, no offset of the teeth required for that job.
    Now not practical for cutting wood but works well for its original purpose unfortunately original purpose seems to have been lost in time and everyone thinks the saw back is for wood.
     
  16. Rick Runciman

    Rick Runciman New Member

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    Nice work. The sawback required some ingenuity. Live and learn I guess. Radius everything off, engineers consider sharp inside corners to be fracture points.
     

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