- Joined
- Apr 3, 2011
- Messages
- 5,792
Hey guys. This will be a long OP so bear with me!
I am so grateful to many of you here for supporting me through the years in knife mods. Some of you may know that I am currently moving towards making a run of folders (liner locks) in the near future. I still have final CAD revisions to make and wanted input and thoughts. Please realize that I cannot please everyone but your input is most welcome.
What I'm looking for is general trends and schools of thought to make sure that I am not making any grave errors in the design before they are actually made. Below I've put my thoughts in the design and some questions. I've already made a prototype so this has allowed me to figure out what I like and don't like in this design to some extent. As with most everything I make and mod this knife must be both highly functional and look really good at the same time.
I'm getting my ducks in a row right now, including from the legal side of things. So it will probably be Feb-March 2019 before I start putting some of these out - so I have some time to get it dialed in =) But I will post updates on Instagram @ razoredgeknives so stay tuned there as well! Thanks guys!
Here's the rough draft CAD render, after several revisions (more to come)
General info:
The goal is to make 15 mid techs (in the $500-ish range) and 5 customs ($1k-1200 depending on options). The mid-techs will be a single piece scale (not sure on material yet) w/ pivot collars. The customs will have slanted bolsters and more intricate grinds/finishes.
Scale/frame design:
The handle dimensions are going to be (initially at least), about 5" long and around .600" thick (not quite 5/8ths thick).
As stated this will be a liner lock so it will have Ti liners. I was originally going to just use the Ti at around .070" thick, but I think I will be making the liners a little thicker at about .090" thick and doing a hardened steel lockbar insert. Why? Because all folders wear and all locks wear. Because I've been in the repair/mod/refinishing business for a while now I am very conscientious of this and want to set this up from the beginning in a way that makes repair easy. Should there ever be a need to re-set the lock up early again, or fix lock slip the lockbar insert will make things sooo much easier. And lock slippage is a non issue if the geometry is right so I will get these dialed in perfect.
On the mid techs I am going w/ a single piece scale. Thoughts on material? I am highly considering going with a diamond pattern texture across the surface for some extra grip and to make it stand out a bit from others =) For the customs I was planning on going w/ ti bolsters (or maybe timascus and obviously making everything match), but thoughts on this and what I should use for the lower half?
For the backspacer I was thinking a backspacer for both a more rigid design and because it allows more customizing options. What do you guys think about he jimping there?
Regarding the liners, I have tested shiros (some of the smoothest folders I have owned/felt) and figured out the lock-bar force which I will be attempting to replicate in my own folders. I also want to use washers instead of bearings - specifically teflon as they have one of the lowest coefficient of friction that we know of and they hold up extremely well. If a folder is built right it can feel like it's on bearings but actually be on washers - and be extremely smooth w/ out the issues that bearings bring to the table.
Here's a few renders w/ out the texture I will put on top... In the render I didn't add the counterbore for the pivot collar but it will be there
Blade design:
So the blade will be 5/32" (.156") thick with the option to make it a little thicker at .166" if I would like, and it will be around 4" in length. I added a fuller for both blade weight reduction and additional grip when opening or holding the blade for whatever reason. On the customs I may do some w/ and some without the fuller to change it up.
Ignore the flat grind in the render above - I will be getting these at full thickness and be doing the grind by hand.
You will notice I left a flat portion at the tip and made it as long as possible - this is because I'm grinding all these by hand so this will allow me to shift the tip of the blade where I want it to get different blade shapes and fit as much blade in the frame as possible. I also may add more material to the spine to allow me to grind it to shape there as well - haven't decided yet.
Steel - I am considering Cruwear or M390 heat treated by Peter's and pushing the heardness. My cruwear blade is at 64rc w/ zero issues w/ chipping at 15 dps geometry and it's fantastic. For M390 I would likely go w/ 62rc. Any thoughts on steel/hardness?
As you can see below, there are going to be a ton on blade shape options I can work with, not to mention grinds.
Clip design:
I've posted these renders elsewhere, but it is certainly appropriate here. The clip is something that can easily be overlooked by mfg companies, but I am thinking out everything to the smallest detail.
I designed this clip to be both highly functional and ergonomic w/ no hot spots. I have a 3D printed version out of grade 5 Ti enroute but I will not get it before the beginning of December. This will allow me to test functionality and make any revisions. The goal is to make one w/ enough spring so it's easy to go in and out of the pocket, yet retains enough strength to not deform if it gets caught on something. I also want it to flow w/ the overall "working knife" design w/ no hot spots.
I have had this entire proto both 3D printed and made a working model (w/ a different grind). Here's a few pics... (the printed one is w/ loose tolerances obiously, and it is w/ the slightly thinner liners).
So that's it, looking for thoughts, ideas, comments, and constructive criticism!
I am so grateful to many of you here for supporting me through the years in knife mods. Some of you may know that I am currently moving towards making a run of folders (liner locks) in the near future. I still have final CAD revisions to make and wanted input and thoughts. Please realize that I cannot please everyone but your input is most welcome.
What I'm looking for is general trends and schools of thought to make sure that I am not making any grave errors in the design before they are actually made. Below I've put my thoughts in the design and some questions. I've already made a prototype so this has allowed me to figure out what I like and don't like in this design to some extent. As with most everything I make and mod this knife must be both highly functional and look really good at the same time.
I'm getting my ducks in a row right now, including from the legal side of things. So it will probably be Feb-March 2019 before I start putting some of these out - so I have some time to get it dialed in =) But I will post updates on Instagram @ razoredgeknives so stay tuned there as well! Thanks guys!
Here's the rough draft CAD render, after several revisions (more to come)

General info:
The goal is to make 15 mid techs (in the $500-ish range) and 5 customs ($1k-1200 depending on options). The mid-techs will be a single piece scale (not sure on material yet) w/ pivot collars. The customs will have slanted bolsters and more intricate grinds/finishes.
Scale/frame design:
The handle dimensions are going to be (initially at least), about 5" long and around .600" thick (not quite 5/8ths thick).
As stated this will be a liner lock so it will have Ti liners. I was originally going to just use the Ti at around .070" thick, but I think I will be making the liners a little thicker at about .090" thick and doing a hardened steel lockbar insert. Why? Because all folders wear and all locks wear. Because I've been in the repair/mod/refinishing business for a while now I am very conscientious of this and want to set this up from the beginning in a way that makes repair easy. Should there ever be a need to re-set the lock up early again, or fix lock slip the lockbar insert will make things sooo much easier. And lock slippage is a non issue if the geometry is right so I will get these dialed in perfect.
On the mid techs I am going w/ a single piece scale. Thoughts on material? I am highly considering going with a diamond pattern texture across the surface for some extra grip and to make it stand out a bit from others =) For the customs I was planning on going w/ ti bolsters (or maybe timascus and obviously making everything match), but thoughts on this and what I should use for the lower half?
For the backspacer I was thinking a backspacer for both a more rigid design and because it allows more customizing options. What do you guys think about he jimping there?
Regarding the liners, I have tested shiros (some of the smoothest folders I have owned/felt) and figured out the lock-bar force which I will be attempting to replicate in my own folders. I also want to use washers instead of bearings - specifically teflon as they have one of the lowest coefficient of friction that we know of and they hold up extremely well. If a folder is built right it can feel like it's on bearings but actually be on washers - and be extremely smooth w/ out the issues that bearings bring to the table.
Here's a few renders w/ out the texture I will put on top... In the render I didn't add the counterbore for the pivot collar but it will be there



Blade design:
So the blade will be 5/32" (.156") thick with the option to make it a little thicker at .166" if I would like, and it will be around 4" in length. I added a fuller for both blade weight reduction and additional grip when opening or holding the blade for whatever reason. On the customs I may do some w/ and some without the fuller to change it up.
Ignore the flat grind in the render above - I will be getting these at full thickness and be doing the grind by hand.
You will notice I left a flat portion at the tip and made it as long as possible - this is because I'm grinding all these by hand so this will allow me to shift the tip of the blade where I want it to get different blade shapes and fit as much blade in the frame as possible. I also may add more material to the spine to allow me to grind it to shape there as well - haven't decided yet.
Steel - I am considering Cruwear or M390 heat treated by Peter's and pushing the heardness. My cruwear blade is at 64rc w/ zero issues w/ chipping at 15 dps geometry and it's fantastic. For M390 I would likely go w/ 62rc. Any thoughts on steel/hardness?
As you can see below, there are going to be a ton on blade shape options I can work with, not to mention grinds.






Clip design:
I've posted these renders elsewhere, but it is certainly appropriate here. The clip is something that can easily be overlooked by mfg companies, but I am thinking out everything to the smallest detail.
I designed this clip to be both highly functional and ergonomic w/ no hot spots. I have a 3D printed version out of grade 5 Ti enroute but I will not get it before the beginning of December. This will allow me to test functionality and make any revisions. The goal is to make one w/ enough spring so it's easy to go in and out of the pocket, yet retains enough strength to not deform if it gets caught on something. I also want it to flow w/ the overall "working knife" design w/ no hot spots.


I have had this entire proto both 3D printed and made a working model (w/ a different grind). Here's a few pics... (the printed one is w/ loose tolerances obiously, and it is w/ the slightly thinner liners).





So that's it, looking for thoughts, ideas, comments, and constructive criticism!
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