How to Heat Treat a Knife (Grimsmo Style)

[@phillip5179]

Holy smokes Barry is terrific in front of the camera!

[@Alta9610]

John, You need to get Barry in front of the camera more often.He does a terrific job!

[@JakeTheSnake509]

he was fired

[@Flux9901]

Jake Sheehan how do you know?

[@JakeTheSnake509]

@@Flux9901 john talked about it in a later vid. Barry kept bringing his pet cat to work.

[@Flux9901]

Jake Sheehan ah which one?

[@JakeTheSnake509]

@@Flux9901 marshmallow

[@GeofDumas]

Has Barry worked in PR before because he did an excellent presentation here.

[@mrdnice425]

John, Be a pal and put the lever to the press on the left side for Berry.

[@imajeenyus42]

Unfortunately, the pinion gear/shaft thing on these little arbor presses has a reduced end, so it can only go in from the right-hand side! You'd need to make a keyed extension or something for the left side.

[@ThomasWren]

Wow. What an untapped talent. Barry is fantastic in front of the camera. Great presentation, clear and concise. Did a fantastic job of explaining his process. I did think to myself during the intro that the swapping of hands looked awkward. surely something can be done to make that easier? Even if it is just buy another press with the handle on the left. Would be worth it for how much smoother it would be.

[@davidmurray700]

John, Next step is to add a air cylinder to the press. We have a couple of them doing hot press work and they are just great. Would free up a person standing there holding pressure on the press arm... Just a thought. Great video! Dave Murray

I thougt of something similar. Like a automated press doing all the steps in a exact cycle. Probably its possible to measure the surface-temp of the plates and make it adjust itself. Then add a more sofisticated coolingsystem to it (as in: not a aquarium-pump in a bucket ;) )

[@CurtVanFilipowski]

Great work Barry! Concise and professional, really cool seeing videos from other members of your team!

[@artmckay6704]

Have y'all ever tried deep freeze treating the blades as a final treatment? Thanks! :)

[@joshuawentworth7426]

Im pretty sure that you can disassemble that arbor press and make it left handed

[@fabianthe_lazy_couch_potat7657]

Thank you very much for another great opportunity to see how you work. I really appreciate it. They healthy. Peace

[@manofallmasterofnone1020]

I like that you made a video of your heart treat process.

[@valuehorse7584]

You guys should pick up a recirculating chiller for those plates, that's a really cool design.

[@r.j.sworkshop7883]

Nice to see the system improvements all together as a whole. And excellent to see Barry in the leading role! Keep up the good work.

[@Justthemow]

This guy rite here is a true Canadian he's so obnoxiously polite.

[@anchorbait6662]

Thanks Barry! Well done Sir

[@halfdippedcom]

Thank you Barry Great work

[@jimsvideos7201]

Have you - Erin I presume - changed your camera arrangement? New lens? It looks like you have a lot more light getting into the camera now.

[@Adam-pq2sp]

Nice job Barry! Thank you.

[@gandolflitke]

The norsman is an amazing knife! But I would like to see the jimping near the handle brought up just a bit. You loose a lot of useful jimping when the knife is open because it sinks down into the frame.

[@Batti2323]

Fabulous explanation, Barry! I learned a ton from this. Great job!

[@tacitus101010]

Barry is a great presenter! Hope to see him on camera more.

[@HardcityRaindrops]

When is the rask available again?

[@shanedavidson2971]

I watch them use torches and such. why is the tang never heat treated. does it harden when tempering in the oven.

[@Proud2bmodest]

Put some limit switches on the press connected to a timer and beeper to control the timing. Or get even fancier and use a small PLC or Arduino to activate locking pneumatic cylinders to maintain pressure when the press is closed as well as handle timing and operating a beeper. This frees up the operator so he can start unwrapping the previous knife while current one is being tempered. For safety, the locking cylinder should only be able to activate when the press is almost completely closed to prevent any possibility of pinching a finger. Keep any potential pinch points less than 3/16" to avoid safety issues. One way to do this is to have pins going through the bottom plate and have the cylinders lock on these pins below the plate. The pins and cylinders can be completely enclosed eliminating any safety issues. The press would still be manually operated, just the increased pressure and hold time would be automated. A limit switch would sense when the press is almost completely closed which then activates two timers. The first timer activates the cylinders for the required hold time and the second timer activates the beeper at the end of the quench cycle. Alternatively, a PLC can monitor the switch and also add cylinder position switches on the locking cylinders to monitor their operation.

[@imfbrad]

John our brilliant engineering boss! lol....John did you write his script?

[@thepredatoers]

hey John have you thought about cooling the blades with liquid nitrogen in oder to get a more martensite structure before tempering? if that is beneficial for your steel joice... greetings from Germany ans thank you for your insight and delight for machining

[@marianoaldogaston]

I saw in some videos that it did not cool so fast, because nitrogen make a gas layer in contact with blade and do not cool as fast as water or oil

[@pmunson7063]

Great job Barry. Let's see you on video more often.

[@erinboatguy]

Careful.....don't breath the super hot air from the kiln......I did once and burned my throat and vocal cords. Felt terrable​ for a week.

[@anchorbait6662]

Ouch

[@skfab]

Great job Barry

[@automan1223]

I am a little confused. I thought heating the metal to a critical temperature (high) anneals it and makes it SOFT unless you pack it with a hardening material. Wrapping a baggie around it does not count. ???

[@jimmygrey6848]

Annealing only happens if it cools too slowly from critical temp, that's why you need a quench. Never heard of "packing with hardening material"? maybe if you were trying to get some hardness into a non hardenable alloy but you don't need to do that at all with these kinds of knife/tool alloys. The stainless foil around the blade is to form a barrier from oxygen, certain alloys can decarburize and form scale when contacting oxygen at critical temp.

[@MoondyneJoe]

As a fellow Lefty Barry I take it John didn't consider going to Ned Flanders Leftorium to purchase the Arbor press. I would have thought as John is such a good boss, worker safety would play a big role in the workplace and having to cross yourself while handling hot items would have been an issue ! Good Job on the Presentation of the Video Barry well done mate Tony frm Western Australia

[@xenonram]

I love your videos John. I'm so confused at the deburring and pressing parts. You're lapping the blades. So why the effort to make sure they're flat? Also, all that work to deburr them. Those bags are super thick stainless steel. Do you think there would be a burr large enough to puncture the bag? If so, spend 4½ second and wipe the edges with a scotch brite pad. It seems like he's doing A LOT of deburring just to stop a puncture.

[@Dakakeisalie]

Lapping a warped blade flat takes forever

[@jeffl1356]

Seems like you could put them in the vibratory deburr unit and save the manual labor.

[@crazybrutus1234]

You need a better designed kiln. To load and unload to make it easier to get into and out but looking great nice pid on the press plate

[@andrewgiles6192]

great content Barry, loved it. 👍

[@glockmeister26]

Barry should be the new face of Grimsmo knives. The third Grimsmo bro.

[@miraclo3]

i am not convinced that the press quench is nearly as good at keeping an adequate amount of martensite as a standard quench because its too slow and not as rapid of a change. i feel like it would make the edge too soft. maybe i am wrong.

[@RobertJLessard]

I've wondered the same and I thibk it makes sense. Some makers I follow, heat treat the blank before grinding the bevels and I'm starting to see an advantage if that for end result. More belts/mill bits used then working in unhardened material though. I'm going that way for the small Blade's I make. Heat treat a rectangle if steel and then process it into the blades.

[@derekstang7045]

Any opinions on cryo treatment?

[@anchorbait6662]

I'm warming up to the process :p

[@marvinschneider2707]

An Idea would ne to use a big pneumatic zylinder with an arduino timer instead of the hand press.

[@mikemacwillie]

That press needs a pneumatic cylinder! :)

[@natehenneman6766]

Barry is the man!

[@ROBRENZ]

Nice Video! ATB, Robin

[@parentevan]

Nice wrap-up. Why not bend that arbor handle into a U or L shape and make it friendlier to your left-handed accountant?

[@markmessore5648]

My kingdom for a new overtravel disc!😁

[@molitovv]

Barry is a natural

[@robertfrank544]

Barry, for what it's worth, most arbor presses are made so the handle is reversible.

[@DarcnezLP]

Consider doing cryogenic heattreating as all of your blades are stainless

[@bcbloc02]

You should have degraded your old heat treat furnace to tempering and bought one with a sealed one you could run Nitrogen atmosphere in then you could have eliminated all the foil bags and the powder and bunches of time. I think the investment would offer substantial returns.

[@Daniel-vq9zb]

I'm surprised being a air quenched steel your not getting bad results by not opening the bag

[@jkanecutlery]

It needs to be completely oxygen-free to prevent decarb at the high temps and time required for stainless steel.

[@colbyweber650]

put a piece of paper in the bag for atmospheric hardening. It ignites and burns any remaining oxygen from the bag

[@InformatrIIcks]

Here's a simple project for you : add a DC motor and a footpedal to the press !

[@DDizzle666]

First!

[@theartofcraft4480]

Copy and replicate 😀

[@Dsky44]

John look super old in this video!

[@mMAmericanSpiritMm]

LoL, apparently these blades roll from hitting packaging staples. This video explains why.

[@PowerMountie]

I agree ,it seems like their cooling process is too slow to keep an adequate amount of martensite. also i'm kind of surprised by the steel choice for such an expensive knife.

[@Ughwhatevs]

Why the "LoL" though? If there is a suggestion you can offer that would improve the quality of their knives, why not just suggest it?

[@mMAmericanSpiritMm]

I've seen these knives for $750. These fellas portray themselves as engineering wizards, but don't bother learning pretty basic metallurgy. Not my prerogative to lay it all out for them.

[@stefanwossner2007]

That was something that made me wonder in the last video, too. Even my 12° slicer kitchen knife doesn’t bend, roll or chip when hitting a bone. But it’s a cryogenic treated steel and made in Germany by Zwilling... Don’t get me wrong, I’m in total admiration of where Grimsmo has got to and their dedication and everything, but I wouldn’t have expected that bad rolling from hitting the staples. John’s blade must have an extremely thin edge for a work knife...

[@Ughwhatevs]

@@John-ik2eg Absolutely. I've never gotten the sense that Grimsmo and company portray themselves as wizards of any kind but, rather, as perfectionists who are constantly learning and improving. The fact that they expose themselves to ridicule by showing their mistakes and then the subsequent improvements is evidence enough of that. On a personal note, I've never run over a staple but I have a Norseman and absolutely love it.

[@astrazenica7783]

Don't give away your secrets!

[@xenonram]

"Secrets"? Nothing shown here was out of the ordinary.

[@josuelservin2409]

They have been documenting all his process for years, that's for sure part of their success, because we can see how much they have improved and all the work and dedication they put into his products.