Making Roubo's shoulder knife

[@BlackSwan912]

Your shop is quite cool… I saw your breath! Great excellent video!

[@KrisHarbour]

That is a loverly knife, well done mate.

[@GillisBjork]

Thank you very much!

[@trueleyes]

Very, Very, interesting Gillis, especially getting into the physics of the tool. Thanks again for a very well spent time with you on KZbin.

[@GillisBjork]

Thanks for the kind words!

[@professor62]

Hi Gillis! Very interesting video. After you’ve had time to become more proficient with the tool, I’d like for you to do a follow-up video discussing your thoughts on the tool’s usefulness, practicality, etc. That way you can make a more knowledgeable recommendation about whether the rest of us should make the tool. Thanks for the mind-bending content!

[@GillisBjork]

Thank you! Yep, sounds like a good call!

[@mikewood6076]

I am a gamer and a wood worker. Thanks for the recommendation!

[@GillisBjork]

Awesome! Thanks for watching!

[@thomashverring9484]

Ooooh, I have to make one! I have seen the type before, but seeing you build it just made it so much more accessible. And, yes, I have to watch the Fallout video too :^)

[@BlackRaven-w4e]

VERY interesting tool. I think maybe using a branch or a wood rod curved with heat would be easier to make. Maybe be a curved blade as in the original would be easier to control. Congratulations!. 😊

[@chuckpremer3111]

Liked the video, enjoyed the physics class. Have a Merry Christmas, see you in video next year.

[@GillisBjork]

Thanks, happy to hear that! Merry Christmas to you too!

[@strazzafurniture]

Having made a couple of these knives. I’ve found that if you copy the curve of the blade as Roubo has pictured in his book it will enable you to cut curves much easier.

[@GillisBjork]

Thank you so much for the expertise! I’m a huge fan of your work!

[@strazzafurniture]

@@GillisBjork Oh Thank you! Thats a surprise that you know my work. I hope to learn how to use the shoulder knife better.

[@GillisBjork]

@@strazzafurniture I follow you on instagram, you're honestly always one of the first names I mention if someone asks me which woodworkers I admire/get inspired by. Your marquetry work is so stunning. I'll work on the shoulder knife technique as well!

[@PeriodWoodworker]

I am happy to have found your channel. You do very nice hand work. I subscribed. Thank you for sharing with us, Steve

[@GillisBjork]

Thank you very much!

[@rclamond]

Video games and woodworking sounds like my demographic. Throw in a craft beer review and the trifecta will be complete.

[@GillisBjork]

Haha! Not qualified for craft beer reviews I'm afraid!

[@msampson1949]

hi Gillis grind that curve on the blade and you will be amazed how it flows we used a similar knife in my great uncles workshop when he inlayed around chess boards. he hated noise. had to consentrate when fine work was needed near the end of a 100 hour job so the knife was total control never saw him take a second pass one cut with the curved blade thanks for the vid took me right back to 1970 had forgotten how mesmerizing watching was stay safe

[@giuseppedeepakbentihandtoo3809]

Great work Gillis!!!! 🙂Thanks for the video!!

[@GillisBjork]

Thanks mate! My pleasure!

[@TheRaven0811]

Gamer here too! I also love woodworking. But maybe not ancient French tools so much, although a very interesting video.

[@hassanal-mosawi4235]

Thanks for sharing those tips and the make!

[@GillisBjork]

Thanks for watching!

[@josephpotterf9459]

Thanks Gillis really nice work

[@GillisBjork]

Thank you!

[@ollejonsson7175]

Inspiring!

[@GillisBjork]

Thank you very much!

[@luvdub1]

Hey Gillis, thanks again for your videos. I mostly appreciate the physics explanation because I think I can use that concept in my projects or maybe approaches to other endeavors. The knife seems a bit unwieldy, so I doubt I would ever make myself one. But as a mostly hand tool guy, I appreciate you introducing me to the tool.

[@GillisBjork]

Thank you! Glad the concept has applications for you!

[@RichardMerrill3Hawk]

Thank you, Gillis. I have recently started watching your channel. This looks like such a classic tool. I wonder if it would be easier for long straight inlays or longer curves as the 18th century cabinetmakers would have done in decorating furniture. Taking a stance alongside a board and shifting your weight from your front foot to the back could give you a nice long sweep or a long straight line with good control. I loved your physics lesson -- very informative. I wonder how many woodworkers think about force in newtons? I for one would love to see Christmas gift videos.

[@GillisBjork]

Thanks! Yes, long straight or slight curves is probably a good place to start learning this tool I think. Glad you liked the lesson!

[@darkosimic86]

Very nice tool I really like it and also see quite few uses for it in my shop! And also; you are definitly not alone on that slim overlapping line between gaming and woodworking!

[@GillisBjork]

Thanks!

[@robjohnston5292]

Great video, I like your presentation style. I'm share this with my daughter who's into working with hand tools. I'm sure she'll enjoy it.

[@GillisBjork]

Thank you very much!

[@jeghedderhenrik]

i have never heard about this one.. det er da utroligt smart fundet på

[@RobertBrazile]

I wonder if the piece you cut off from the Hock knife would be enough to make a curved blade to try out...

[@schm4704]

Well done! 21:25 I'd use something countersunk like a DIN 91 screw with a corresponding nut. I use those for handsaws, and they are readily available around here in big box stores, sometimes even nice brass ones. Since the screw and the nut have the same head, they will look nice and symmetric.

[@GillisBjork]

Thanks! Sure, something like that would work!

[@EHill-bt1rp]

Great video. Instant subscribe for me. Seems to me that a curved blade would allow you to slightly rotate the blade by the curve of the handle for a curve like leatherworkers.

[@GillisBjork]

Thank you very much! Interesting, didn't know that was a thing in leatherwork!

[@th34lch3m1st]

I think the original curved shape of the blade could give you more precision and maneuverability (just a thought 🙂 ). Thanks for sharing.

[@GillisBjork]

Yep, I think so too! A curved blade should require less force to pull through the wood, making it easier to control.

[@robjohnston5292]

I agree 👍

[@docrumpel1260]

Well, I am also a gamer and a woodworker 😉 Both hobbies are great and I don't want to miss one of them. Your knife is great and I can imagine that it gives more power. But it is same as it is with cars - more power needs more control, more Knowhow, more experience. I'm curious how you'll manage with the knife in the long run. But no matter what, this tool is a real eye-catcher. I love it 👍🤘

[@GillisBjork]

Cool cool! Fully agree, wouldn't loose either one. Yep, absolutely right, it'll take a bunch of experience getting used to it. Many thanks!

[@oih1969]

Thanks for another interesting video. I like the organic look of the tool, and I suspect it'll become more and more useful as you grow accustomed to it. I hope you sign or mark these tools and the furniture you create. At some point some relative or enthusiast is going to enjoy exploring the origin of these items. My grandfather made me a mallet once and bought a chisel for me. I broke the mallet, but I still have the chisel. Whish I had the mallet though, since it wassomething he made. There is a knife somewhere on the farm where he lived, roughly made from a file ( still jagged on the sides), simple birch handle. l want to find that knife. It was his butcher tool, insanely sharp.

[@GillisBjork]

Many thanks! I try to remember signing the furniture, but forget more often than not haha. Never thought of putting some sort of mark on the tools I make, but it sounds like a good idea. At the same time, I kinda like the anonymity of finding an antique, handmade tool that bears no marking other than the signs of decades of use. Creates a mystery :)

[@oih1969]

@@GillisBjork I appreciate the humble mindset.

[@MCsCreations]

Pretty interesting project, dude! Fantastic work! 😃 It should be called a snake knife! 😬 Anyway, happy holidays! And stay safe there with your family! 🖖😊

[@GillisBjork]

Thank you! Yep, sure looks like a snake haha. Happy holidays to you as well!

[@alangknowles]

I suspect steering the curved blade of Roubo would be easier than the straight one you managed to source.

[@marks5603]

The majority of force imparted to the knife edge is supplied by the fingers 2-3 cm sbove the blade. So I doubt having a long handle offers much additional force. I guess you could grip it as you did. Id opt for a few more controlled strokes when greater depth is needed. Good info.

[@GillisBjork]

Hmm, I tried to explain what the handle does but perhaps I did not do it well enough. You could try searching for "third class lever" for more explanations.

[@matthew4878]

@@GillisBjork looks like it will have less of a disadvantage than the small knife, but the main difference is that you can really use the strength of your arms and the weight of you body instead of just the fingers.

[@GillisBjork]

@@matthew4878 yes, that obviously helps too.

[@marks5603]

@@GillisBjork You explained it fine. I'm not overly sure the two handed application of such force is prudent. I'm not sure I would have the dexterity to guide the knife accurately under those conditions. I wonder if an extension for a conventional marking knife would serve as well. Nice build and food for thought.

[@Kristoferskogsberg]

De är kanske lättare att följa kurvor med ett rundat blad? så som på bilden.

[@GillisBjork]

Mycket möjligt! Tror att det inte krävs lika mycket kraft med ett rundat blad, så lite lättare att kontrollera. Man kanske får bygga en till nån gång för att testa!

[@Kristoferskogsberg]

@@GillisBjork biten som blev över går nog o slipa till, smart med utbytbart blad😊 Eller om de bor nån smed i närheten, annars kan jag hjälpa dig att smida ett blad.

[@GillisBjork]

@@Kristoferskogsberg Bra idé, får prova att göra det!

[@bertRaven1]

this probably sounds really dumb, but would a sort of perpendicular handle give you more control, ie like a set of handlebars on a bicycle

[@GillisBjork]

Very interesting idea! You'd loose some of the leverage I think, by positioning your hands further from the cutting tip (the bars would have to curve upwards, right? To clear the work surface when tilting the tool) but it could probably give more accurate control

[@BobBlarneystone]

Hmm, a curved blade might make it easier to cut curves.

[@vladimirtsarkov8568]

цікавий різак, щоправда скоріш за все це вигадано в свій час для тих хто працює в цеху-по крупних діталях . Для тих хто працює щодня з ранку до ночі та щей не по самій м'якій деревині - бо так руками багато не наріжешь -рук не вистачить . і це таки для роботи сидячі . якщо сісти правильно то будете спиратися на спокійне плече і краще конт ролювати резак . такаж система існує у майстрів що займаються тисненням по тоненькій меді латуні чи лужоній бляшанці - це для прискорення процесу -за раз можна видавлювати пачку з 2-3 аркушів .

[@augusthermann5111]

Hej Gillis! Har du äntligen en värmare i din verkstad?

[@GillisBjork]

Yes, jag har skaffat en liten värmare!

[@charlotteenpapa5349]

I have an old painting which depicts a clog maker using this tool…

[@pettere8429]

Hade det inte varit enklare att gå ut i skogen och leta rätt på en pinne med ungefär rätt form?

[@GillisBjork]

Klart det hade varit enklare. Men tänk på hur lätt du knäcker en pinne i den tjockleken. En så ung kvist är bara märg och ytved; ett laminerat stycke av kärnved är mycket starkare.

[@kentostlund6311]

Hejsan prova att ritsa först med den lilla kniven först😁

[@GillisBjork]

Japp, det är så man använder den i praktiken, ritsar kring stycket som ska fällas in och sen följer linjerna med stora kniven!

[@JohnDoe-qg6hm]

I doubt they would have wasted a plank of wood on the should handle back in the day ! I like to think they would have just found a branch of the right proportions to fit them and used that. Seems like a lot of waste in this project.

[@GillisBjork]

You're the second person to suggest this, but the first was in Swedish, so I'll answer again in English. Consider how easily you snap a branch as thin as this handle. It'll be supple when green, but dried, it breaks very easily. That is because a such a young branch is only sapwood and pith. With the amount of leverage this handle needs to take, heartwood is necessary.

[@JohnDoe-qg6hm]

@@GillisBjork Ahh well ive learned something today ! :D Thanks for that clarification and important tip. Much appreciated and hope to see more videos soon. Im looking for ideas for a woodworking station i can build outside which will take rain and snow but will be durable and not become horrable to use.