Lockbar Inserts, Why Are They Important?
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- Опубликовано: 30 мар 2021
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Our Products: www.grimsmoknives.com/
John Grimsmo Knives Instagram: / johngrimsmoknives
Erik Grimsmo Instagram: / erik_grimsmoknives
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This would be an awesome application for an optical CMM. You could measure what the actual rake angle is on a fully assembled knife and adjust from there. You could also find out what kind of profile is created from breaking in a titanium lock face and duplicate that into the hard insert.
He could use aluminum maybe with insert? I like aluminum handles
Am I the only one who sporadically gets artefacts in the video?
thought it was my pc
Nope. Got them here too
Same
I'd give the window fixture another try with thicker walls so it gains stiffness against vibrations.
It seems like a crazy idea but what about brazing and grinding a carbide insert into the lock bar insert? You could grind them on the kern with a diamond wheel and it would probably be the smoothest lock action EVER.
I wonder how you would break the edges on the carbide.
A wheel could do the flats but you would need a really small diameter diamond grinder to break the edges on the inside edge.
@@kkknotcool pcd tooling can cut carbide and can be ground to very small sizes. It would be expensive though.
@@kkknotcool Kern did a demopart out of a cabid endmill, so I see no problem...
the harder one part, the more stress for the other part (blade).
also: the harder the insert, the higher the risk of accidental slipping, especially when the angle is too steep.
nero knives made a good video about this topic, basically all his zt's had a lock fail just from lightly tapping the spine of the blade, meanwhile his spyderco southard without an inlay didn't fail.
Dude, it is beautiful and the 2 lock bar insert screws on my late 2023 Norseman match the ice blue on the exterior screws. Total overkill but I’m glad your happy with the finished version, that most folks will never appreciate. Love these videos..
Hi John. Good to hear your philosophy of "we can do a little better" That is Japanese "Kaizen" Continuous improvement. Cheers, Cliff
Me with my kid: no you can’t play with my phone, it’s to expensive.
John with his kid: here play with my million $ kern 5 axis.
the machine is made against failiure by 8 year old kids
Great videos John. The videos and Instagram posts are directly driving sales.
There are a lot of great real life engineering lessons in this video, very informative, great stuff
John, I’m loving these longer videos! The only problem is they keep giving me an excuse to watch videos instead of starting my own shop. 💪
Loved the deep dive in to you process!
Super video. Really interesting. Details the intricacies of knife designing very well.
Your a pretty cool guy! Not because of your knives and how you make them. It's all about you teach and allow a child in your shop! That alone tells me all about you! BRAVO!
The detent nub is perfect and love that I don't feel the catch of the detent ball. Great engineering!
So, if you grind the detent ball almost to flat, and then add a ramp to help it out... Do you even really need the ball? Sure it's "traditional", but could it just be a feature machined into the lock insert?
Great advertisement. I had never considered one of these knives and now I need one. Very cool.
Plain Jane titanium, blue hardware, acid wash blade, lefty Norseman with lockbar insert would be my holly grail!!! I’m so proud Grimsmo is made in Canada 🇨🇦
Love the learning. Thank you.
Very impressed. Possible because you are your own boss. Don‘t get told what to do. I work like this foe over 30 years and it is very rewarding and lots of fun. My clients get the best possible products.
Great video 👍 john The time is getting closer to apply robotic load and unload in the production.
why do you still need the ceramic detent ball.. why not just go all the way like holts and BN and make the nub the detent.. now you have basically two detents.. also.. you can stabilize the insert without needing two screws if the bar is wedged like on a shiro 95
Really Enjoyed the tech/design dive in this video.
Leif's face when you mentioned tolerances :D:D:D
maybe it's a ptsd kinda thing, because jhon talked about tight tolerances when Leif was coming into the bedroom of his parent's 😅😬
Love it, very similar to Holt's design, except their nub is adjustable to change the detent strength.
Watched it all, GREAT video!
When the lockbar insert on your knife is better steel that what most knives are made of.
Question on clearances John... Do you prefer to design them into the part, or into the CAM cycle as negative stock to leave, or perhaps use the "Create Manufacturing Model" feature in CAM? Perhaps all? I am trying to decide which way to go on it and could use a little direction. Might also make a good video topic for you. Ciao, Marco.
very good video..thanks for your time
Imagine if John Grimsmo had a John Grimsmo to watch 10 years ago.
Hey! That's my idea!
Just wondering...if you put a very small cut behind the locking point, to give it a small amount of compliance under high shock loads, preventing the lock from distorting the actual frame lock, while not reducing the 'feel' that it's locked under something like normal, manually-applied loads. ??
Love the video! Like the Willemin Macodel shirt!👍
I know you guys use ceramic bearing balls in your products but I’m curious, could the Swiss lathe be used to make bearing ball slugs which could then go on to the lapping machine to be finished?
First! Did I win a Norseman?
Seriously though John, your processing and innovation are truly amazing. I really enjoyed this video.
Now, I thought that the part of the virtues of a frame lock was when you were really bearing down on the knife there was no way to have a close I didn't see Eric's hand really gripping it hard maybe if he was really gripping it hard it would NOT fail. Maybe needs to get a padded Kevlar glove and then whack it.
I would trust it, but then I don't spine whack my knives, but I appreciate the fact that you do..
What kind of lubricity on the mating surfaces?
When are the lock bars going to be available on the Norseman?
The lock bars are on every Norseman now! We update our inventory frequently on our website.
What's all the bubbling at the bottom of the pallet during the threadmilling after you turned off the coolant?
air purge, to ensure no small chips or grinding dust get in to the seals of the Table
does it prevent you from paying a licence for the over travel disc ? Is that licence still a thing ?
Paid to who ?
Damn I could have helped you save alot of time on R and D on that. I lucked out on my first try with an insert. Its not %100 perfect but its pretty good. Lookin good 👍
Has jorge sprave done a extreme stress test on their knifes?
Get a slowmotion camera with macro, for testing stuff like lockbars
wow 8 years old now. thanks @johngrimsmo you now how to make a guy feel old now
All of this could be avoided with different lock. Axis lock style or superlock from Snecx. ;)
This goes to show what it takes to build/design a quality product. The R&D is greatly appreciated, by me at least. I don't own a Grimsmo but someday I hope to change that.
Why do so many custom makers go with the frame lock when it seems so finicky?
Do you ever forget you're carrying one of those when you head through airport security?
Lafe's a lucky kid.
Kids who grow up in shops graduate HS with a more valuable education then most college graduates.
That's very true! Thanks for what you stated.
There is a number of reasons why I have had lock bar inserts in my knife designs from the beginning. I incorporate the detent ball and overtravel stop into the insert for two reasons, it saves making a separate stop and if for some reason the ball depth or fit is wrong you just make another insert and not throw away a handle. Also the lock can be individually fitted to the blade to tune lockup, again with no insert if the lock up is wrong it means a new handle or blade or both. 👍
Kids in the Hall!
Since you are machining to such high tolerances do you have your machines certified ? Just wondering how you inspect your parts . Great vids . Nice to put quality into the design over cost to manufacture . Your a rare find young man .
Why do you have to move your thumb across the path of the blade to release/close the blade?
That’s how framelocks work. Even if you engineered a framelock so that the lock bar was on the show side of the knife your thumb would briefly be in the blade’s path as it closes.
Sounds like you want an axis lock or a shark lock or something. I prefer frame locks by a mile.
kids are fun
As a Canadian, you guys are my favorite Canadian company and I wish to be able to afford one of your knives someday. After student loan is paid off possibly.
HaHa- brilliant life choices
1. Take out student loan
2. Spend 1000.00 for a knife.
@@oldschool19931. Go to university to get a good career.
2. Buy a 1000$ knife with ease.
Anyone who thinks getting a degree followed by a career is bad life choice , hasn't a damn clue. Lol.
@@Bear-nu8xm Sorry, I just had this hilarious vision of you rushing home excitedly to your wife saying -
"Hooray, we just made that last payment on my student loan, now we won't have to eat ramen every night and send the kids to school in used clothes. I'm going right down to the sporting goods store and buy that 1000.00 knife"
@@oldschool1993 Nah, my better half makes enough for steak dinners. After my engineering degree is complete, I'll do alright salary wise ,surely.
@@oldschool1993 Self fulfilling prophecy?
I like the fact ur showing ur failed test.. that’s what’s up
Leif er 8.
Gammel nok til å håndtere en kniv.
Not old enough to carry it. 😊
Hello OCD brother:)
Consider getting a universal robot to do that lock bar test. Robo has no finger or metal fingers hurt less 😉
video has a bunch of artifacts intermittently
Your daughter just made this video,Bear
You looks tired Mate... Nice stuff anyway
I could sit on John’s lap all day and listen to him talking nerdy. 😆
Hey John I really love your videos I juste order a knife from you but man the focus on your videos is really slow when you’re showing parts close up and sometimes the focus doesn’t even have time to be completely clear and you take the part out of the screen and it’s becoming really annoying to watch. Like your last few videos all have that problem and it would be nice if you work on that when you film your next videos. Other than that great videos showing problem solving keep up with the good work 👍🏻
Yes, at least half the videos are out of focus.
Overpriced knife!
If it fails in spine whacks, no thanks. Brings the value way down.
These are all prototype knives. He would never sell a knife that failed a spine whack.
@@Pleasestopthat I never said that. I was just making a statement on the subject.
of course for 500 bucks and more it must be mint , considering what it is (just a knife) . The amount of detail this guy puts in the product is very very impressive tough
@@kisspeteristvan I mean they did sell these for over 700 and only used cpm154 with a trash heat treatment for about 9 years, improved last year by a professional heat treater. So yea.
@@Brad-vs1lk well , i see no point in such expensive stuff , i'm also not a Rothschild
Ditch the metric threads and you won't have to explain.
Metric is the metric
Why not different variations of di... umm BLADE shape?