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The Woodworking Blogs Aggregator

This "aggregator" collects all of the woodworking blogs I read every day - or try to anyway!  Enjoy!

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Luthiery

Bending Beautiful Bubinga Binding

Doug Berch - Thu, 04/16/2015 - 9:47pm

Though I have done it countless times I am always amazed when a straight. flat, piece of wood turns into the curved shape of a dulcimer. Heat and moisture make wood pliable. It’s that simple. Today I bent bubinga binding for two dulcimers in the works. After sawing bubinga into appropriately dimensioned strips I clean […]

The post "Bending Beautiful Bubinga Binding" appeared first on "Doug Berch."

Categories: Luthiery

Music I’d Like To Hear #90

Doug Berch - Fri, 04/10/2015 - 8:49pm

The post "Music I’d Like To Hear #90" appeared first on "Doug Berch."

Categories: Luthiery

What’s On The Bench – 4/3/2015

Doug Berch - Fri, 04/03/2015 - 5:25pm

My first “shop” was my parent’s kitchen table in our apartment in Brooklyn, NY, probably around 1973 or 1974. I grew up with very little knowledge of tools and woodworking.  I bought tools as needed and learned to accomplish the most work with the fewest tools. I also learned to improvise around anything I needed […]

The post "What’s On The Bench – 4/3/2015" appeared first on "Doug Berch."

Categories: Luthiery

Making a Three Piece Guitar Back, or, When You Choose the Wrong Wood

Brokeoff Mountain Luthierie - Sun, 03/29/2015 - 3:37pm
It is important to make a nicely fitted joint.

Dean Kimball, Construction the Mountain Dulcimer, 1975


I picked up a back and side set of "wild grown" east Indian rosewood from the Woodcraft Store in Loveland, Colorado a little over a year ago. I remember that Woodcraft had advertised this wood on their website then and by the time I got around to ordering it they had sold out. I think it sold for $49.99 a set and I bought this set for $70.




Originally, I had planned to make with this rosewood was going to be simply fitted with bubinga bindings, nothing fancy, but after glueing in a bit of bubinga between the two back halves I realized my mistake. The reddish bubinga disappeared in the field of browns and olive greens.




What to do!

First thing I did was to cut the back apart with knife and straight edge, then I spent some time going through my wood cache.

Curly maple was too showy and I had already fitted out the last two guitars in maple; California laurel didn't look right; walnut, nope; another piece of rosewood?




Then I found some sapele. It fits well with the rosewood and compliments the western red cedar top that will go on this guitar.

The no.7 Stanley plane in this photo is now one of my favorite planes, it is remarkable how easily you can adjust the blade depth on these vintage planes when you use the original blade and there is very little backlash.




This jointing operation was a little tricky, I didn't have much excess wood in which to place indexing pins. I used an original hole for one pin and then I had to use a brass brad for the lower bout. Sorry about the fuzzy photo!




Ah, the glue up! White/black purflings border the sapele insert and I used Lee Valley High Tack Fish glue to glue the whole thing together.




The back after clean up.

It's always nice when you can fix a mistake and make everything look better!



Here's a YouTube of the wonderful guitarist, David Russell!


Categories: Luthiery

Junk Sitka Spruce

Brokeoff Mountain Luthierie - Tue, 03/24/2015 - 2:40pm
It seems but natural and reasonable that the woodworker should have at least an elementary knowledge and understanding of "wood", the principal material with which he works.

Herman Hjorth, Principles of Woodworking, 1930



I purchased several sticks of Sitka spruce bracing material six months ago from a well known lutherie supply (which will remain nameless, I still need to buy tonewood from them), I used one blank to make braces for one guitar and I had no problems working it.



Prep work started on the "conservatory model" - a high quality, lower cost guitar aimed at students who can't afford a $3,500 guitar - with jointing, assembling the cedar top and installing a rosette, making the neck, etc., and splitting out the Sitka spruce braces.

In the above photo you can see what happened to a brace when I gently (yes, I said gently) flexed it, it broke!

The reason it broke under light pressure is because the early growth rings are much wider than the late growth rings. I noticed this when I received the wood, but figured, hey, it's Sitka spruce it should be tough.


I was wrong. Here you can see how wide the growth rings are, this wood isn't even suitable for the beefier transverse braces that go above and below the sound hole, it flexes too much.




Here is a piece of old growth Douglas fir that I've been hoarding for fifteen years, you can see how tight the growth rings are.

The piece split well and is very light. I used Douglas fir for guitar bracing when I first started on this adventure that is lutherie, it's terribly strong, though can be a little heavy. Several guitar makers told me I was crazy to use it because it is too heavy.

Not all Douglass fir is "too heavy", the braces that I split out were as light as the Sitka spruce. Yes, I weighed them!






So once again I am back using Douglas fir, this time for braces on a Miguel Rodriguez style guitar.

I grew up with Douglas fir because it was a tree that lived in my backyard which was the million acre wood known as Lassen National Forest. I know how Douglas fir responds to an axe, a plane and a nail. Sitka spruce doesn't grow where the Cascade Mountains buried the Sierra Nevada, I didn't get a chance to work with until I was an adult.

Sometimes it isn't a bad thing to stick with something familiar.
Categories: Luthiery

More Wooden Straightedges

Brokeoff Mountain Luthierie - Mon, 03/23/2015 - 8:10pm
A straightedge of convenient size should be made for ordinary use, and almost any kind of well-seasoned wood is suitable, mahogany and walnut being usually favored...

Bernard E. Jones, The Complete Woodworker, 190?




I posted else where on this blog about making straight edges from one of my favorite woods, California laurel.

My mistake was making only one straight edge from the laurel, I should have made two.

Why?

Two straight edges the same length are easier to check for straightness, you just put the edges together and look for a gap, then you can plane the edge straight again.

I realized I need an 18 inch straight edge, instead of a 17 inch straight edge, to check the flatness of the fret board that I recently put on a copy of a 1930 Santos Hernandez guitar.


My stock of California Laurel is getting low, what I have is reserved for another blanca guitar, I have some nice eastern black walnut on hand so it was off to the table saw.

I ripped out two slats, clamped them together and jointed the edges. I didn't taper the pieces as per instructions given by Jones in the aforementioned book (or what some former editor[s] of a woodworking magazine says you are supposed to do), I left them chunky so when I go to re-shoot the edges all I have to do is butt the ends up against the bench stop. I don't have to chuck them into Shop Fox vise, just fix them and go back to work.

I do plan on beveling the edges as Jones suggests doing, those edges give a better reading when placed on the surface that is being observed.




Ah, just what I needed!

The guitar is now fretted and after I run some errands tomorrow morning, I get down to the business of carving the neck.

Once that task is completed I will then have three guitars - a Torres FE19 guitar, a 1961 Hernandez y Aguado guitar and this Santos - to French polish!

Stay tuned, I will be posting photos of the latest 1930 Santos Hernandez style guitar!
Categories: Luthiery

Music I’d Like To Hear #89

Doug Berch - Sat, 03/14/2015 - 12:46pm

The post "Music I’d Like To Hear #89" appeared first on "Doug Berch."

Categories: Luthiery

Proper Attire When Planing Wood

Doug Berch - Thu, 03/12/2015 - 12:11pm

As a dulcimer builder I use traditional techniques and tools that have been around for a very long time. I also learn many things about lutherie and woodworking by reading books as old or older than some of the tools I use. This morning I learned that I have been missing an important skill and my work […]

The post "Proper Attire When Planing Wood" appeared first on "Doug Berch."

Categories: Luthiery

Stanley No.101 "Toy" Block Plane

Brokeoff Mountain Luthierie - Sat, 03/07/2015 - 9:35am
Fine guitars can be made without any power equipment.

Irving Sloane, Classic Guitar Construction, 1966



The other day I needed to finish shaping the braces on the back of the latest guitar, a copy of a 1930 Santos Hernandez guitar. I didn't want to fuss with my No.60 1/2 block plane...



so I pulled out this little number. I bought it about two years ago at a meeting of the Rocky Mountain Tool Collectors for $5 and it's been sitting on the shelf until this week.





I locked the blade in the sharpening jig and took it to a diamond stone, didn't take long to get a good edge on it.





I flattened the back using "the ruler method", the blade took on a nice polish...





and I swiped the sole across the stone a few times. Still needs a bit of work, but really, I'm using this plane to shape braces not a table top.

If it only had an adjustable mouth...


I know you can find these planes used for around $25 on the Internet, pick one up and give it a try, it's a fun little plane!
Categories: Luthiery

Ebony chopping board: cutting the groove

Guitar Building By Hand - Sun, 03/01/2015 - 11:42am

Before starting the groove I used a marking gauge to traced out the edge of the channel and marked the outside corners by tracing around a coin:

Marking out the channel on the board

The marked out the channel on the board

I used a carving gouge to cut out most of the channel:

Carving the channel

Carving the channel

Carving a long groove consistently along the grain is difficult. To solve this I made a scraper and attached it to a wooden block. By running the block against the edge of the board I was able to get a smooth consistent channel:

 

Using the scraper to smooth out the channel

Using the scraper to smooth out the channel

Next I rounded off the edges of the board slightly it was done!

 

The completed chopping board

The completed chopping board


Categories: Hand Tools, Luthiery

Assembling the ebony chopping board

Guitar Building By Hand - Thu, 02/26/2015 - 5:59am

I learned a lesson when I unpacked the ebony for the chopping board. It was rough sawn, straight off the bandsaw and dusty. Somehow I had imagined the ebony would be planed square and pretty much ready for glueing up. Since blanks for guitar fretboards are usually planed when you get them, I assumed this would be the case with these blanks as well. How wrong was I?

This meant I was in for a lot of work. I tried planing the wood with my hand plane. I managed to flatten the face of one of the pieces and was about to start on the second face when I noticed my plane was dull. Very dull. I sharpened up and planed the second side. Then, my plane was dull again, and I was way out of square. I tried a few more pieces but decided this was not going to work: I had to plane four sides of 28 pieces of ebony. At this rate I would have to sharpen my plane 112 times over weeks of planing.

I changed tactics and decided to use the machines in our shared workshop. I used a planer (on a very fine setting) and thicknesser to get the blanks flat and square. This went a lot quicker with better results. Since I hadn’t used the machines much until now, I also got to understand them a lot better.

Once all the pieces were planed I did a trial run and glued up the the board:

Test run before glue up

Test run before glue up

Glueing up the ebony

Glueing up the board

I did the final levelling and cleaning with my hand plane and cabinet scraper:

The glued up chopping board, cleaned up with a plane and cabinet scraper

The glued up chopping board, cleaned up with a plane and cabinet scraper

 

Up next, cutting the grooves…


Categories: Hand Tools, Luthiery

Santos Hernandez Style Classic Guitar - Late Night Work

Brokeoff Mountain Luthierie - Tue, 02/24/2015 - 7:53pm
The classic guitar is a difficult and demanding instrument. There are no short cuts.


Vladimir Bobri, The Segovia Technique, 1972



I got back to work on a close copy of a 1930 Santos Hernandez guitar yesterday by glueing on the so called "fan bracing", as you will notice, these braces are nearly parallel to each other, and the transverse braces to the top.

When I got up this morning I un-cinched the clamps and discovered that the top had a definite twist to it.

Hmm. Bad glue up technique on my part and the humidity had dropped from 39% to 29% overnight, not good for a guitar top or my nerves. That is the problem with working at lutherie this time of the year, especially during and right after a big snow storm, the relative humidity can really drop. The humidifier can't keep up.



I needed to run errands this morning, when I got back I split the transverse braces off the top and shaved the remnants down to the glue.

Then I made new braces.

I clamped the top down to the work board and glued on transverse brace number one, once the glue was set then I glued on the wide flat brace closest to the neck.

After that, time to walk the dogs and make dinner.




The brace below the sound hole has a 1/16th of an inch arch to it to help dome the top.

Doming the top gives the guitar a real voice, one that has volume and character. It's like a drum head, you want it tensioned to be loud.

When I glue this brace on I usually use two slats as backing cauls and a C clamp at each end. Then I push two shims in between the slats to force the top to the brace and the glue.

This action is what can cause twisting.

Tonight, I used the slats, but I started by clamping in the middle, the a C clamp on each side of the Quik Grip, and continued on down to the ends of the brace.

I couldn't see any twisting or winding to the top.




Then it was a little trim work on some laminated all walnut cam clamps, which I should work on tomorrow..




and then double check the neck. If all goes well I can bend the sides tomorrow and attach the top to the neck.




Now it's bed time.

It's not that late, maybe nine o'clock, but I never could work late into the night, even in college I couldn't work on term papers past 11pm. Back then I had an electric typewriter that could erase the last ten words that you typed, I thought I was lucky to have such a beast.

Still, I have a jar full of incense cedar bodied pencils that are more fun to use than any computer.

Categories: Luthiery

Ebony chopping board: cutting the groove

Guitar Building By Hand - Mon, 02/23/2015 - 6:37am

Before starting the groove I used a marking gauge to traced out the edge of the channel and marked the outside corners by tracing around a coin:

Marking out the channel on the board

The marked out the channel on the board

I used a carving gouge to cut out most of the channel:

Carving the channel

Carving the channel

Carving a long groove consistently along the grain is difficult. To solve this I made a scraper and attached it to a wooden block. By running the block against the edge of the board I was able to get a smooth consistent channel:

 

Using the scraper to smooth out the channel

Using the scraper to smooth out the channel

Next I rounded off the edges of the board slightly it was done!

 

The completed chopping board

The completed chopping board


Categories: Hand Tools, Luthiery

A solid ebony chopping board?

Guitar Building By Hand - Mon, 02/23/2015 - 3:46am

I know someone who loves the colour black. His kitchen has a black granite work surface and black floor tiles. To finish it off he really wanted a black chopping board but was having no luck finding one. It had to be jet black with no frills except for a groove to catch juices and crumbs. In terms of colour, I suggested Ebony would be a good choice but a very expensive one. Rightfully so, as it is becoming increasingly rare. Ebony is also very hard but brittle. It is also heavy, so perhaps not that practical for a chopping board.

I tried to find alternatives to ebony. I found out that a solution of steel wool soaked in vinegar was excellent at blackening oak (do a search on ‘ebonising wood’ and you’ll find all kinds of information). This created a deep black colour, but it didn’t penetrate deep enough for a chopping board. Even after soaking for a few days, the black only went down half a millimetre at most. A few chopped tomatoes and the unblackened oak would be exposed.

So I decided to take the plunge and go for ebony, but only if I could get it ethically. The most ethical source of ebony I found was a shop in Spain that is involved in a partnership with Taylor Guitars. Together, they’ve purchased a saw mill in Cameroon, through which they are promoting the ethical sourcing and use of ebony. Apparently most ebony isn’t black. Only after chopping down a tree does it become visible how much black wood there is. Since the non-black ebony had little value, only the black ebony logs were taken to the mill. The rest was left to rot. One benefit of this project is that they promise a good price for the non-black ebony and Taylor uses this in their guitars, thus reducing waste. As Taylor says “We need to use the ebony that the forest gives us”.

I agreed on using ebony on two conditions: the first was that I get the wood from the Cameroon project and the second was that I would make something else from the wood if the board was to fail for some reason.

The project got a “go” and I bought the ebony. The most suitably sized blanks were 30mm x 15mm. My plan was to glue these together to create a 30 mm thick board, about 500mm long and 300mm wide. I ordered the ebony and it arrived a week or so later:

The ebony has arrived

The ebony has arrived

The ebony blanks

The ebony blanks

 

It was a heavy pile of wood! Next: how I created the board.

 


Categories: Hand Tools, Luthiery
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by Dr. Radut