How can a table saw cut a curved truss rod channel?
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- Опубліковано 22 лют 2018
- How can a table saw cut a curve? Dan Erlewine has a neat tip and a jig you can make in your shop. The result is a precisely curved truss rod channel just like the one in an original Gibson neck.
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For those asking best I can tell these are the measurements he listed:
Nut-3/8”
1st-13/32”
3rd-7/16”
5th-15/32”
7th-1/2”
9th-15/32”
12th-15/32”
15th-7/16”
but what are those in english? :D
How about for bass guitar??
My dad purchased that very model saw the year I was born, now it's mine and I use it often to this day! They don't make em like that anymore! ;)
Good Job Dan!
Love what your doing here. Using the concept of a boesens Compass to cut your arc. Actually cutting a template arc is superfluous. You could just make a triangle that fits in your arc to the same end, strait lines being easier and more accurate to cut. Thanks for all your great work as a luthier and educator.
Absolutely brilliant!
Very cool technique, thanks for sharing!
Dan, you are a true genius!
Great work, and many thanks for posting.
Very cool ! thanks for sharing your knowledge and techniques.
Dan, in 65 years I’ve met very very few people with your ingenuity, skill and genuine love for your craft. By the way, the Orpheum banjo guitar is flawless
Dan is Legend. .
Well taught. Thank you.
Nice jig Dan! It is helpful to mention that the deepest part of the curve needs to be as close as reasonably possible to the back of the neck in order for the rod to work best. So it is good to know how thick you plan to shape the neck before you determine how deep to cut the channel. 3/32" from the bottom of the channel to the outside of the neck would be my choice.
Fantastic new knowledge for me! Thank you Dan! You have helped me tackle a number of problems regardless of the fact I am not a luthier - though coincidentally I make control knobs for bass guitars for F Bass. Thanks again Dan!
Awesome! Serious skill and experience.
Extremely cool to watch! Just above my pay grade. Very fun to watch the videos and learn more.
Dan is THE MAN.
Great Dan, I was wondering how to use my single rod trusstods, because I think they make lighter necks, and this video just did it. Thanks!!
That was awesome Dan! *Mind blown... Thanks for sharing. I never even heard of such a thing, but it makes perfect sense.
Dan is brilliant
great how-to video instruction
Very nice. Thank you!
I've been trying to go to bed and keep seeing interesting titles for videos. An hour later and I'm still binging.
Great. Thank you.
Very slick
That is genius.
Good job. I subscribed the channel. Cheers.
Hey Dan the man, you can use a 3/16" chipper blade from a dado stack and do that channel in one pass. Yes I realize chipper blades aren't meant to be used by themselves but it's no big deal to do a couple of truss rod channels with it I do it all the time and it works great.
Pure genius
Genius!
Great video. I would love to see you build a guitar from start to finish. Thank you for sharing your video. I hope you have a blessed week.
Dan Erlewine is the god of guitar work.
I think you could have a very successful career in luthierie and not know even half of what this man could share with you in an afternoon over coffee. This video is brilliant
I squirmed a little when he put his fingers over the blade. YOU'RE SMARTER THAN THAT, STEWART!
Was starting to think I was the only one.
Hes not stewart though....
His name is Daniel Erlewine.
The long sleeves are not safe to wear too...
Cool idea. I'd probably still use a concave router sled.
DAN YOU ARE THE MAN, ONE OF MY FAVORITE PEOPLE BUT PLEASE USE PUSH BLOCKS OVER A TABLE SAW BLADE. WE NEED YOUR AWESOME HANDS FOR FUTURE VIDEOS. THANKS FOR THE AMAZING IDEA AND VIDEO.
Hey Dan! That intro music sounds great. Tell me what, where, and how...Please...?
👍 awesome.
Great idea! Would be great to do this with a traditional Fender style, but the skunk strip never goes all the way to the ends of the neck. Would love to see if Dan has a solution for this.
The same jig could be set up with a router, and put stops at each end to prevent cutting all the way through. You just need to drill a bit deeper before or after.
Would have been nice to see how he handles fabrication and installation of the curved filler strip that is inset in channel and sandwiches the truss rod.
Kyle Stevens
Yeah, that’s a key component.
Putting a fingerboard over that curved slot would do nothing.
Kyle Stevens, You use the same curved template to draw the curve on a piece of 3/16th " thick maple. Cut it out and glue it into the TR slot. When the glue is dry you plane the filler strip flush with the fingerboard surface of the neck and the angle of the headstock.
Thats a chonky neck lol amazing what it looks like before till its finished great stuff
It would been nice to see how you cap the truss rod with the wood strip part II maybe?
Oh right...cause small thin pieces of wood have a long history of being dimensionaly stable...
Cool idea. Much quicker to build that jig than a router jig.
Now how do you set the rod already curved into de slot and hold it there till you glue de fretboard?
Hi folks. I pulled the measurements from this video to build my curve. It seems off. 1/2” at the seventh. Does that make sense?
Do you have to put a corresponding curved piece on top of the rod slot under the fret board to fill the extra gap?
sandman365TTi: You use the same curved template to draw the curve on a piece of 3/16th " thick maple. Cut it out and glue it into the TR slot. When the glue is dry you plane the filler strip flush with the fingerboard surface of the neck and the angle of the headstock.
What about the piece between the truss rod and the finger board that actually makes the the neck bend backwards. As shown on the old Gibson neck, it is a channel, not a ”valley”…
Is it really necessary? Won’t that truss rod only operate in one direction? What if you need some back bow?
Dan, I think you have forgotten more than most people will ever know about building and repairing guitars.
Can this method of curved truss rod slotting be used for any guitar/mandolin/ukulele, etc.? That is one trade secret not many people know about. Good job Dan! Thankz
I actually cut a curved shim and glue it in the back of Fender-style necks.
Is it possible to install a truss rod on an old guitar that doesn’t have one?
How did Gibson do this originally? Did they use a similar technique? Just curious.
Wow
Thank you Sir. :) Sincerly, r.l.g.iii.
From what I saw on every gtr manual book, the trussrod goes the opposite way which is shallow in the middle. This vid is confusing me.
This idea will work just as well on a router table but with more control, accuracy, and safety.
Although vintage Gibson truss rods were in a straight-tapered slot this is still a very cool technique
Post tension concrete....
Why things get so easy only for Dan?
Wow, I would not have my hands on the neck while cutting! Of course Dan is pro but for me, this would be too risky.
Well, it would only be risky if you have the blade so high it will cut the neck in two!
How in the world did you come up with that?
alex tworkowski ; he's like a Guitar Wizard
He must stay up at night thinking all this stuff up.
alex tworkowski Dan is no different from me or you except he has years of self inflicted knowledge and geekesm of all things guitar that put him in a class all his own! All of these tips are so valuable. I have learned so much! We are lucky that this knowledge is available to us! Thankz
Not just guitars, woodworking in general.
Atakdragonfly I'm going with my first theory. That he's either haunted or a spaceman. I saw him splice the ass end of a tele that was remarkable.
Do this method would apply to the 2-Way Truss Rod (www.stewmac.com/Materials_and_Supplies/Truss_Rods/Adjustable_Truss_Rods/4mm_Allen_Nut_Hot_Rod_Truss_Rod.html)??.... Or Do this need a straight channel instance?
Great video, how can anyone give this the thumbs down????
It's really quite simple...all you have to do is click on the "thumbs down" icon....
Dan is the master. But I watched this 3 times and didn't see what the Height/Dist. measurements were for that Gibson neck. Did I miss something?
It varies from neck to neck. He showed you that he sawed the old neck in two and got all of his measurements. It could also be done with a caliper on the old neck. He wasn't trying to limit you to say a "1954 gibson, whatever.
So the plan is to find a classic neck and cut it in 1/2? If you took the measurements for a #### why not share the numbers. I'd like to calculate the radius from those numbers. How about it Dan. Give me the numbers and I'll tell you what radius it is.
Buy a depth gauge
A bit? Is that like a "pinch" or a "dab"? Dan didn't guess. He measured it and created an extremely close comparison of the original. What's the point of copying Gibson, if he could have just "guessed" anyway. My point is, he measured it and didn't tell us what the values were.
And measure what? BTW: I have depth gauges and a granite block to measure it on. I dont have a cut away neck.
"And remember this - there is no more important safety rule than to wear these safety glasses!" - seeing power tools used in this episode (and Dan's shirt) I was hoping he would say that ;)
Surprised me to see an old cheapo Craftsman tablesaw in your shop. I would have expected to see a Unisaw or Powermatic.
Rod Dahl, that old Craftsman is from a time when Craftsman saws were professional tools, built to be used hard, daily, for years. My grandfather was a carpenter. He bought one very early in his career and was still using it long after he retired.
Carl Johnson I’m just going by personal experience with my nearly 50 year old Craftsman t/s. It could hardly be called a saw for professional use. I only meant that, in one of the most famous guitar workshops, they would use a more precision tool.
@@rodeo11 I have 5 of these old Craftsman table saws & have used them since 1984 & have made countless guitars with them- they work fine !:)
galactic brain level
Wow! Not only a good idea, but the first one I've seen in ages from Stew-Mac that wasn't just an ad for some gadget they're marketing that you can buy for 70% less at Harbor Freight. It might be the apocalyse...
failuremagnet Just wait until they start selling a StewMac™ Truss Rod Band Saw Template
They subtlety pimp the $105 truss rod access tool.....
Wait, so you mean to tell me this channel showcases the tools and materials that the webstore of the same name sells?! Well, I for one am shocked... Plenty of other channels out there if you're feel like they are using their dirty advertising voodoo to separate you from your precious money.
Cabby Cabby - So I can't watch their channel's videos because I disagree with your slavish devotion to paying too much for needless tools? Oh dear me, whatever shall I do? Oh yeah - I know - I'll remember that luthiers have been building guitars for hundreds of years without a single Stew-Mac tool. They're not separating me from any $ btw. Almost everything they sell can be bought elsewhere a lot cheaper, which is what I do.
Don Vanco - Oh, yeah - the drill bit with a stop collar? Yep, you're right, they did.
Just think how awesome this would be if they actually shared all the required dimensions so that everyone doesn't have to saw a neck in half to acquire.
Coming next week from SM - Required Dimensions App - only $169.95.
That was for demonstration and concept. Use a depth gauge or caliper and measure the slot. EVERY NECK IS DIFFERENT. YOU CANNOT SKIP THIS STEP. Really? dimensions for all known guitars including all imports? You want someone to spend 8-10 hours a day for about 10 years to come up with that information. How do you then repair a handmade custom guitar. It must really push you to "use your brain". Did you even think about this video, or just start typing?
I just started typing, of course. You must be new to UA-cam comments.
Im not a fan of this technique. I like using a skill saw
Does it actually matter if there is a curve? I've been thinking about it and I'm not sure if the curve would impart a significant load. The knee jerk reaction is to think "yes, that would work". But I then thought, what is the load, how is it applied, what is causing bending in the neck and how will the shape and tension on the rod generate load.
Applying tension to the rod will cause it to want to straighten or reduce the deflection. That, in theory is the advantage to using a curved rod. Because the rod is curved, the mid point would generate the greatest side load, a bit like a wire in tension. But how much load?
My gut tells me this is going to be a very small value as the load applied on the rod is not great and the deflection small.
www.calqlata.com/productpages/00040-help.html
If there is evidence that this makes a significant difference, I'd love to hear about it. Unsurprisingly, I am an engineer and this sort of thing will likely rattle about in my head for a while before I am compelled to do the math and resolve it.
Eccenticly loaded column with a side load imparted by a catinary that is also imparting an eccentric load on the same column simultaneously about the neutral axis of the neck... I suppose.
Look what you've done 🙄 I just can't help myself...
I think it will work fine with a straight slot
Hi there. I worked at Gibson Custom Shop and although I didn't perform the operation, I remember that the filler strip was glued in place, then a load is applied to the rod. The neck is then sanded flat before the fretboard is glued on. When the nut is loosened, it allows relief into the neck. So actually what is happening is the opposite of what Dan is describing. It is an illusion that tightening the nut is straightening the neck. I wish I could remember more of the specifics, but I've always used the double action rod. A quarter inch by three eights slot...done.
AAA
Dan showed but didn't. Because it did not clearly inform the measures. This video was of little use. Unfortunate.