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Doweled Chair Repair #2: First Steps of Regluing

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Blog entry by DrDirt posted 03-31-2014 01:10 AM 863 reads 0 times favorited 7 comments Add to Favorites Watch
« Part 1: Pair of Antique Doweled Chairs Part 2 of Doweled Chair Repair series Part 3: Well it is together »

Well – as one can expect, there are always some unanticipated setbacks.

Started off this morning, to glue the back together. First I carved grooves in the dowels, so that there would not be a problem with the dowel holes filling with glue and the back not coming together.

I double checked the depths, and felt the 2 inch dowels I had cut might be long, so I trimmed them down by 1/8th inch. What I found… is I didn’t go far enough!!, so with hot glue spread, and the assembly coming together in the clamps, the crest rail to leg joint, wouldn’t close up.

So after a long session of streaming profanity – out came the steam wand again and spreader clamps again. Apparently the measure twice isn’t good enough if you don’t consider that the dowel holes are deeper in the center than at the edge of the holes:

So after getting the joints reopened – and scrubbing the glue away with a piece of abralon pad in hot water, then cutting the dowels with a dozuki.

I got the glue reheated to 140-150 F.


I brushed the glue on and got it all together, before the glue set up.

I also took a couple of scrap blocks and glued them with this glue, to be sure that the glue is holding well.

Since there was plenty of time and 10 joints, for the next batch of glue, I will cut the Urea content down to 7.5% from current 15%.

So I have to say I am liking the reversibility of the hide glue… that it glues to itself well, especially in all those dowel holes that were brushed with glue this morning.

-- "If we did all the things we are capable of doing, we would literally astonish ourselves." Edison



7 comments so far

View johnhutchinson's profile

johnhutchinson

739 posts in 354 days


#1 posted 03-31-2014 01:35 AM

A neat trick that I use with homemade dowels is to crimp them along the length with pliers. It not only reduces the diameter of the dowel (by a smidge) but it also provides grooves for the glue. I’ve also found that I want to put glue in the hole and not on the dowel. If I put it on the dowel first, it expands the dowel and defeats the effect of crimping.

And then I never make a mistake with the length. :)

-- John - Central Ohio - "too much is never enough"

View DrDirt's profile

DrDirt

2542 posts in 2467 days


#2 posted 03-31-2014 02:36 AM

Agree on the length John…. it just killed me, that I had all the dowels cut.

Then I felt nervous, and trimmed them down, to put my mind at ease… and they were too long anyway.

There was much cursing! :-)

-- "If we did all the things we are capable of doing, we would literally astonish ourselves." Edison

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johnhutchinson

739 posts in 354 days


#3 posted 03-31-2014 03:02 AM

With me it’s always, “I cut it three times and it’s still too short”. :)

-- John - Central Ohio - "too much is never enough"

View Rick's profile

Rick

7028 posts in 1757 days


#4 posted 03-31-2014 03:52 AM

Just for my Knowledge. Is there any particular reason you wouldn’t buy Pre-Grooved Dowels?

They’re all I ever use and I don’t have any problems with them. The ones I buy are from Lee Valley.

I have them in a number of sizes. These just happen to be the last ones I bought. To Expensive?

Thanks.

-- LJ's "Be Nice" Policy. "Reach out and touch someone." NO! Not There!! ... ;-}

View shipwright's profile (online now)

shipwright

5232 posts in 1522 days


#5 posted 03-31-2014 04:06 AM

My guess is that it won’t be long before you toss the urea all together. As you become comfortable with the straight HHG your planning and execution get much better and you can accomplish quite large glue ups very quickly. I use Old Brown Glue when I need lots of time but 90% of the time I just work quickly and use plain old HHG.

For clean up a Scotchbrite type scouring pad and water works really well. Just keep checking until you can’t see any shiny spots.

The dowels thing is a small glitch. The glue up looks great.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fiberglass trees. http://prmdesigns.com/

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DrDirt

2542 posts in 2467 days


#6 posted 03-31-2014 01:42 PM

Hi Rick I used a standard dowel because of sizing.

The chair used 7/16 dowels – - which are available out there, but had to be ordered, so I purchased a 4 foot dowel instead.

Also, with the leg stretchers, and back, I needed 4 different lengths (started thinking 3 lengths, but that was wrong) So instead of getting a number of packages, I just made what I needed.

-- "If we did all the things we are capable of doing, we would literally astonish ourselves." Edison

View Rick's profile

Rick

7028 posts in 1757 days


#7 posted 04-01-2014 05:06 AM

Thanks for the explanation Edison. Appreciated!

Rick

-- LJ's "Be Nice" Policy. "Reach out and touch someone." NO! Not There!! ... ;-}

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