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Greenwood Rocker — 4th Installment

Posted on January 2, 2013 by David Finck

Time to finish up this rocker! I locate the mortices in the back posts with the aid of a dummy armrest to indicate where the armrest should be joined.

Dummy Armrest

The template for the arm rest gives me locations for mortices and tenons as well as the general outline.

Armrest Template

Shaping Armrest

Attaching Armrest

I shaped the back splats and rockers and applied finish to everything prior to seat weaving. I toned the oak with a couple coats of very dark garnet shellac and followed with two coats of an oil/varnish mixture I made up from Sutherland and Welles tung oil, uralkyd varnish, and their citrus based solvent. In this instance the mix was 1 part oil : 2 parts varnish : 3 parts solvent — very nice and very low toxicity!

Finishing

With the finish completed I went around and pinned the joints. The front and back assembly rungs are pinned by virtue of the side rungs slightly overlapping them. I pinned the side rungs on the inside with 5/32″ D. bamboo skewer. More visible joints are pinned with walnut pegs.

Rung Pinned with Bamboo Skewer

Armrest Pinned with Walnut Peg

Crest Rail Pinned with Walnut Peg

I wove the seat from cotton Shaker seat tape in a simple over-under pattern, both top and bottom surfaces. A cushion of dense batting covered with muslin lies between the two woven layers.

Beginning Warp with Cushion in Place

Starting Woof

Completed Seat

The next step is to locate the post holes in the rocker, drill them and pound the rockers home.

Attaching Rockers

The splats are inserted into the crest rail, which has extra clearance in the holes, so the bottom of the splat can clear the lower rail for insertion of the lower tenon.

And then the rocker is complete.

Completed Rocker

Posted in Greenwood Rocker | 2 Comments

Greenwood Rocker — 3rd Installment

Posted on December 29, 2012 by David Finck

I’m working on the back assembly now. Here’s the the two back posts and crest rail.

Back Posts and Crest Rail

The crest rail has been tenoned and the mating mortices of the back posts formed as well. The crest rail curvature and length determines the spacing and splay of the back posts making it a pivotal component to the overall success of the chair.

Crest Rail Dry-Fit to Posts

With the crest rail dry-fit to the posts the spacing between the posts is set so the back splat rail is cut to length and tenoned.

Back Splat Rail

Since the crest rail will be glued and pinned and the two rungs of the back assembly will be as well, I’ll leave the back splat rail unglued. This simplifies the glueup of the back assembly and lets me fine tune the rotational position of the back splat rail without struggling against seizing glue. Now I’ve tapered the back posts at both ends and got the tenons that will insert into the rockers roughed on the band saw.

Back Posts Tenoned

And now it’s on to shaping the back posts. They are tapered cylinders at the bottom and transition to parabolic in cross-section at the height of the back splat rail.

Back Post Outside View

Back Post Inside View

Contouring the crest rail.

Contouring Crest Rail

This is the setup I used to drill the angled mortices in the front assembly. The simple holding jig is copied from the method described in Drew Langsner’s “Chairmaker’s Workshop” book.

Holding Jig

With the plywood template held against the front seat-rung and the torpedo level resting on the template the front assembly is angled until leveled and then clamped in place. The drilling is done with the aid of a level as well and since the side-rungs are not perpendicular to the front assembly, that tilt angle is also incorporated in the drilling.

I dry-fit the back panel with the crest and back splat rail, then drilled for the seat- and lower-rung of the back assembly, and finally glued up the back assembly. Drilling the side-rung mortices into the back posts is probably the trickiest step of the entire chair, and unfortunately, the one step I did not document as I was so focused on getting it done right! If words will suffice, I first used my back panel mockup to determine the side seat-rung angle in relation to a flat surface when the back assembly was resting on that surface. I recorded that with a simple bevel gauge — a foot-long 2 x 4 with the end of a batten attached to one side in the middle with a single screw that is tightened enough to hold the batten in position as needed. A second similar bevel gauge gives the splay and the drill is aligned to the two bevel gauges for drilling.

With the side-rung mortices drilled in the front and back assemblies I fit a dummy side seat-rung of correct length to each side so I could get a length measurement for the lower side-rungs.

Test-Fit Front and Back Assemblies with Dummy Side Seat-Rung

After shaping, drying, and tenoning the side-rungs the chair is really taking shape!

Glued up Chair

Until next time!
df

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Greenwood Rocker – 2nd Installment

Posted on December 25, 2012 by David Finck

I’m getting started on the front posts now. Since the rungs joining the posts are at right angles I went ahead and drilled the mortices and roughed in the tenons at the post ends on the bandsaw while the stock was still square. Then I bandsawed the initial curves before switching to drawknife and spokeshave to complete the shaping.

Front Posts

Shaped Front Posts

The high-angle spoke shave I made to help smooth the difficult grain on the recently made birdseye maple and red oak end table also came to the rescue for this rocker (it’s there in the foreground).

With the front post shaped I finished roughing in the tenons by chiseling to the drafted tenon diameter (5/8″) at the ends.

Chiseling Tenon

Trimming Tenon Shoulder

I then rough shaped and tenoned the two front rungs.

Upper and Lower Front Rungs

To dry out those tenons before gluing up the front assembly I wrapped the rungs and posts in aluminum foil while exposing the tenons and baked them in my cook stove at 140 degrees (with the door propped open slightly) for about 3 hours. After the baking I finalized the tenon size with a tenon/plug cutter driven with a hand drill and cleaned up the shoulders with a chisel. This is the still over-sized tenon.

Shouldered Tenon

I used hot hide glue for the glue-up. I like the fact that if the joints ever loosen in the future that they can be reglued without having to clean off the old glue. Hide glue sticks to itself quite well.

Front Assembly Glueup

Until next time!
df

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Greenwood Rocker in Red Oak — Installment 1

Posted on December 25, 2012 by David Finck

I’m taking a detour from violin building for a bit as I shift over to fulfill a commission to build a rocking chair. It has been quite a few years since I built my last one, but it has always been quite a pleasure and challenge to do this sort of work — lots of curves and compound angles, steambending and shaping with drawknife and spokeshave. Time to dive in!

Red Oak Billet

I have squirreled away a nice stack of billets of red oak, such as this one, split out of a gorgeous windfall from several years back. Rather than continue to split and rive the wood to working dimensions, I prefer to resaw the stock at this point to obtain the best yield and to also make it easier to rough in tenons from the squared stock as needed.

Here’s the oak sawn into front and back posts, rockers, splats, rungs, back rails, and armrests.

Resawn Stock

Before going any further I put together a mockup that allows me to adjust the back angle and test the splats and back rails for comfort. I keep tweaking angles and curves and heights trying to hone in on a really comfortable chair!

Back and Seat Mockup

Once settled on what I’m going to do I get the steam-box fired up and get to bending. The bent parts need days, preferably a week or more after steaming, to dry out and set the curves.

Crest Rail

My small steam-box is in the background. Once this bend has cooled and set for a few hours I’ll let it dry on the form inserting narrow spacers between the form and the piece for increased air flow. My friend Link, man of many ideas, suggested using slightly thicker spacers for the middle to maintain the curvature since the radius of the bend would increase if all the spacers were the same thickness.

Rocker

Since the stock has very little runout and the curves are relatively mild the bends go well with very little or no fracturing. Any more bend than this , or a less “bendy” wood requires the use of tension straps to assure success. It’s nice to keep it simple.

Back Post

With only a couple of forms made to bend the six back splats I built a drying rack to hold all the bent splats and free up clamps and the forms for bending.

Back Splats on Drying Rack

Until next time!
df

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A First Violin — 2nd Installment

Posted on December 25, 2012 by David Finck

With the side, or rib, assembly together, it’s time to mark the outline of the top and back and then carve them to shape and thickness.

Preliminary Carving Top

Marking Back Outline

The pins used to index the top to the rib assembly are seen here as well as the variety of tools I used to shape the top outline accurately. I scribed the exact outline of the ribs and also made use of a spacer to create an outline about 3 mm beyond the margin of the ribs to mark the saw cut.

After the initial carving was completed I formed a flat ledge prior to routing a channel to accept the purlfing inlay

Purfling Ledge

Purfling Channel

I should have mentioned at the outset that my primary resource for building guidance is the lovely book by Chris Johnson and Roy Courtnall, “The Art of Violin Making”. I do however have a library of reference materials about 2 feet long on my book shelf thanks to my dad’s collecting efforts. I managed to work my way through all of it prior to embarking on this endeavor!

With the channel completed, the purfling itself was bent, fitted, and glued into place.

Bent Purfling

Inlaid Purfling

Purfling Closeup

Next comes the final carving of the outside accomplished first with chisel, then small arched finger plane, and finally a thin, very flexible scraper. I prepared a template of the f-hole and located that on the top once the carving was finalized.

Finger Plane

Scraper and F-hole Template

Now for carving the inside. The thickness of the top is not uniform and is described by something like a topographic map into zones of various thickness. Once these areas are outlined I used a drilling method with the drill press to indicate proper depth. A wedge is graduated with appropriate thicknesses marked on it; the board with the vertical peg is mounted on the drill press and then the depth stop is set using the wedge as required. The top rests on the peg and is drilled as needed to mark the thicknesses. After the top is drilled hand carving begins

Drilling Fixture

Drilled Top

Carving Top Inside

Carving Inside Top Complete

Here’s the f-holes in progress

Bass F-hole

F-holes Completed

The bass-bar is now fitted, glued, and carved. I took a novel approach to locating it that some builders may find useful. The notched walnut blocks are temporarily attached with double-stick tape. The notches in the blocks are a slip-fit for the width of the bass-bar and allow a small amount of movement forward and back for accurate rub-fitting of the bass-bar to the top. After gluing, the blocks were released by placing a few drops of acetone at their edges.

Bass-bar

The procedures for the back are nearly identical. It’s getting close to time to glue up the body!

Finished Back

Until next time!
df

Posted in First Violin | 7 Comments

A First Violin – 1st Installment

Posted on December 24, 2012 by David Finck

Though I have yet to chronicle my progress, I have been at work from time to time on my first violin. As mentioned before, my dad dreamed of building a violin, but never quite got around to it. When he passed away the notion got hold of me to pick up on that dream. With two violin playing daughters it was even harder to ignore the call and so with some trepidation and more than a little excitement I picked up spruce and curly maple and dove in. Realizing there are many fine books on the subject and many others with much more expertise than I who have filled pages on the internet, my aim here is just to give a quick overview on my progress as the project takes shape. Perhaps you’ll be inspired to give it a go yourself…

Planing Curly Maple

The maple for the back planed beautifully, as you can see. This comes from a store of lovely maple that I been seasoning for well over twenty years. It’s hard maple rather than the traditional soft, so I’ll have to dimension the back thinner than is usual. I’m removing milling marks prior to glue-up.

I have little experience with traditional hot hide-glue so it’s been a lot of fun learning to use it. Here’s my first attempt at a “rubbed joint”. Hide glue shrinks in on itself as it dries, drawing a closely fitted joint even tighter together — clamps are not needed.

Rubbed Joint

This is the Englemann spruce top being joined.

Next I built a half-template and mold based on a drawing of a Joseph Guarneri violin provided with an old how-to booklet on violin making.

Half Template and Mold

The mold serves to hold the corner blocks in place as the sides are glued. Here’s the mold with the recesses for the corner blocks positioned and cut.

Corner Block Recesses Cut Into Mold

Now the corner blocks are spot glued in place

Mold with Corner Blocks

The half template is indexed to the form using the nails pictured above and is used to trace the curves of the sides onto the corner blocks, which are then carved to shape.

Carving Corner Blocks

The sides (or “ribs”) are all bent on an electric bending iron. This is a setup for gluing the “C-bout” to the corner blocks.

Gluing a C-bout

Here’s how the rest of the side pieces were glued on.

Sides – Final Glue-up

Until next time!
df

Posted in First Violin | 7 Comments

A Steep-Angle Wooden Spokeshave

Posted on December 20, 2012 by David Finck

One of the most empowering things I learned as a student at the College of the Redwoods Fine Woodworking Program many moons ago was the idea that first you think of where you want to go and then you figure out how to get there. As woodworkers we are often limited by our tools, whether it’s tuning them up to work properly or not having the correct tool for the job at hand. Perhaps it’s a specially shaped knife or chisel or hand plane that’s needed to do something well. In my case, as I mentioned in the last post, the red oak I was shaping into table legs was giving me fits. It had a stringiness that resulted in tear-out no matter the lightness of the cut or the sharpness of the blade when I attacked it with my spokeshave. I had one of these little cheap-o Indonesian hand planes laying around and gave it a try on the red oak. The 65 degree bed angle did the trick beautifully allowing for nice shavings without a trace of tear-out.

I decided to attempt a spokeshave using the same general layout. This was venturing into territory I had not previously explored. First I had to wrap my mind around the layout so I drew it out on a scrap of maple. I lined up a side view and top view so I would know were to place my cuts.

I reproduced this same layout on my blank and chopped the openings. There is a brass wear strip inlayed into the front of the throat opening (it is indicated in the sketch above as a cross-hatched area at the tip of the blade). The ends of a strip of 1/8″ brass were beveled to 45 deg. on a disc sander. I knifed the outline into the sole, chopped out the waste, and press-fit the strip into place. Then I shaped up the handles:

Here’s the finished tool along with the templates used to layout the handle shapes. This tool was made from persimmon:

Here’s the brass wear strip inlayed in the bottom:

The finished spokeshave worked like a charm!

Until next time…
df

Posted in Miscellany | 6 Comments

A Little End Table

Posted on November 1, 2012 by David Finck

I sometimes find that circumstances help to dictate my work and the circumstance that confronted me recently was too many short lengths of interesting wood. What to do? Well, there are many uses for such pieces, from cutting boards to box panels to fuel for the wood stove. After some pondering I decided on a little end table. This would only use up one chunk of short stuff, but it might lead to a run of little end tables too which would obviously use up more short stuff. Honestly, I was also intrigued with the possibilities that had arisen while building the sofa table I featured a few posts back. That piece had the legs dovetailed right into the thick top and I wanted to explore that theme a bit more.

I put together a mockup based on a quickie sketch using 2 x 4 glued up for the top and other bits and pieces. I liked the idea of including some simple steam bent legs in the design. I also penciled in the dovetails and a through-tenoned rail — I ultimately gave up that treatment for the rail as it struck me as too busy. The mockup gave me a lot of good information concerning proportions, splay of the curved legs and construction details. I took a trial run at the steam bending to check on spring back and to confirm that the bend was mild enough to omit a tension strap. It also provided me with a sample to try my hand at shaping a tapered parabola (in cross-section) into the leg. There was enough positive here to give me the confidence to dive right in.

I had some very lovely birdseye maple that I resawed into veneers and then glued onto a substrate of straight-grained hard maple. Then came the big dovetails. I used the same bandsaw jig described in the sofa table to cut these.

I took time to document only one other in-progress shot, but it’s an interesting take of the leg glue-up.

This shows the padded and shaped clamping cauls required to direct the pressure in the right direction while also providing protection to the finished parts.

Here’s a few looks at the finished piece:

This basic form opens up lots of other possibilities to explore. You will probably be seeing some variations of this in the future. While building this, the red oak used for the legs proved to be a bear to shape with a spokeshave. No matter how sharp or fine the cut it would tear out in strings. I decided to try making a high angle spokeshave to tackle this problem and it worked brilliantly! I’ll give a brief chronicle of that soon.

This one’s for sale: $650 (SOLD). dimensions: 21″ x 16″ x 12″

Until next time!
df

Posted in A Little End table | 4 Comments

Students from Afar

Posted on October 1, 2012 by David Finck

August and early September stayed very busy with teaching individual workshops. Jacob Koehler came down from NYC to dive into dovetailing.

He started off making a hand plane and put that to use while building a dovetailed box. Henessey, his pound pooch kept a close eye on him at work.

Harry Judge is another New Yorker, but from upstate. Harry brought along a wooden plane he made several decades ago in a workshop with one of Jim Krenov’s friends, Bob Sperber. He made a little adjusting hammer for that tool and spent the rest of the week working on a dovetailed box. We also covered a variety of topics with some Q & A.

Lastly came Alan Langhoff, traveling all the way from New Orleans, by way of Charlotte where his wife was attending the Democratic convention. Alan put together a persimmon plane, and I think this photo captures his pleasure with the project:

I am so appreciative, and even amazed, that people come from a distance to spend time together in my shop. It is truly enriching to get to know these folks and share some woodworking knowledge.

Until next time!
df

Posted in Private Instruction | Leave a comment

Guitar 26: 9th Installment — Completion

Posted on September 21, 2012 by David Finck

It’s been quite a while since I last posted about this guitar. Prepping the guitar body for finishing went smoothly:

Then a filler and few coats of water based lacquer.

I hit a hurdle though after polishing out the sprayed on water-based lacquer, which I have used successfully in the past. I discovered I really didn’t like the appearance of it on the Macassar ebony. Somehow the finish cheapened that gorgeous wood. So, off came the finish with a scaper.

I decided French polish was the way to go so this guitar ended up with a fully French polished body. It was a lot of extra effort, but very worthwhile. Here you can see my supplies: pounce bag with pumice, garnet shellac for a bit of toning, super blonde shellac, alcohol, mineral oil, and pad. The bridge is masked off and the fret-board area as well.

With the body finished, I completed the bridge and got that glued on. Here’s my template, layout, roughing, and the nearly finished bridge:

On goes the neck:

String it up and call it done!

I’ve played the guitar a bit and wow! This is the best finger-style guitar I have made to date: excellent neck feel, spot on intonation, sustain that seems to go on forever and punchy volume. It’s still a bit brassy, but I expect that to mellow out quickly with a bit more playing in.

Updated: this one sold to Michael Kline, friend and fine singer and picker.

Until next time
df

Posted in Guitars | 4 Comments

Greenwood Rocker — 4th Installment

Greenwood Rocker — 3rd Installment

Greenwood Rocker – 2nd Installment

Greenwood Rocker in Red Oak — Installment 1

A First Violin — 2nd Installment

A First Violin – 1st Installment

A Steep-Angle Wooden Spokeshave

A Little End Table

Students from Afar

Guitar 26: 9th Installment — Completion

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