Lock bar geometry -- thoughts?

[roblockwood]

I hope this doesn't come off as me TELLING anyone how to do lock bar geometry. I've read some guides, but have plainly never made a functional lock bar, so bear that in mind if you choose to watch.

I am looking for opinions- Am I on the right track?

As stated in the description, I've since scoured the web and found a variety of recommendations, mostly pointing to the 7-9* range. My guess is, the angle isn't super critical, but rather the point of interference is. The angle the arc creates in the video is largely exaggerated, somewhere around 14*.


[video=youtube;jJb_SEBNP6I]http://www.youtube.com/watch?v=jJb_SEBNP6I[/video]

Also, apologies for the poor video camera action. I dont regularly do youtube videos, and am entirely foreign to operating a computer while simultaneously pointing a camera at it.

Any how, any thoughts or opinions are welcome.

 

[raylaconico]

Lockbar geometry and how to do it is really very simple. Terzula's book pretty much explains it all. What you're doing with CAD is really cool and much more complicated than actually cutting a lockbar. I'm taking a CAD class this next semester to help in the designing of knives. The lockbar is much more simple than that.

 

[Stacy E. Apelt - Bladesmith]

Nice video, but sort of re-inventing the wheel and coming up with round as the new shape

Post some photos when the actual knife is made and finished. We would like to see how it comes out.

 

[roblockwood]

Lockbar geometry and how to do it is really very simple. Terzula's book pretty much explains it all. What you're doing with CAD is really cool and much more complicated than actually cutting a lockbar. I'm taking a CAD class this next semester to help in the designing of knives. The lockbar is much more simple than that.

What i'm after is predictable lock bar geometry and (equally important) how to define it as such. I've cut a few by hand (file) with no troubles, but its much easier to do something like this incrementally by "feel", rather than by defined geometry.

Nice video, but sort of re-inventing the wheel and coming up with round as the new shape

Post some photos when the actual knife is made and finished. We would like to see how it comes out.

Will I have any issues with an arc? The actual material difference between an arc and a flat, in this case, is nearly microns-- but alas, I search for answers

I'll be sure to post pictures of an actual knife, some day.

 

[raylaconico]

Incrementally is the only way to do it, in my opinion. Grinding is easier and more predictable than filing.

Good luck. I look forward to seeing the finished knife.