That looks good, Breck, but if you're going to keep up with the Hawaiians, you'll need to at least double the number of inserts. 
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Using the butterfly spines for a bowl crack
- Thread starter Breck Whitworth
- Start date
Having done template routing and having templates damaged I use a foot pedal to turn the router on. That way both hands are firmly on the router to help prevent it jumping as the bit hits the work piece. The foot pedal has uses on other tools too where you don't have a spare hand to turn on power.
Haven't done any butterfly type crack repairs and surprised to read they usually don't extend all the way through the wall of the bowl as I had assumed. With a single 3/16" thick Stebbins insert sanded down to match the bowl radius it seems like not much crack holding. Anybody have a butterfly fail due to the force of the wood movement?
Haven't done any butterfly type crack repairs and surprised to read they usually don't extend all the way through the wall of the bowl as I had assumed. With a single 3/16" thick Stebbins insert sanded down to match the bowl radius it seems like not much crack holding. Anybody have a butterfly fail due to the force of the wood movement?
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Once wood has split due to internal stresses means that the stresses have been relieved so unless you tried to pull the crack closed and then hold it closed by installing patches the patches don't have any appreciable forces acting on them. Another way to look at your question would be to observe if the crack is essentially stable without a patch ... If so, the forces acting on the patch would be the minimal.
Concerning the pewa patch not going all the way through, assuming that the patch is glued in place, a lap joint is stronger than a mitered joint.
I am assuming that our normal use of a patch is an embellishment and not something that is intended to make the vessel watertight.
Google Stebbins Studios. He’s got all the stuff you need.
What are we looking at here Peter? Done with a Biscuit Jointer?
Just a simple back saw to make cuts across the split (CA the splits first). Sand down a small piece of contrasting wood to fit the kerf and split out pieces for each. Glue in and true up outside of bowl, then turn the inside. Not elegant, but worked.
We had a demo yesterday
the guy used blur tape like that and then used hot melt glue to set the template to the bowl! he explained that you can add more hot glue as needed and the blue tape makes easy to lift off the bowl when done!
the guy used blur tape like that and then used hot melt glue to set the template to the bowl! he explained that you can add more hot glue as needed and the blue tape makes easy to lift off the bowl when done!
Yes, blue tape makes clean up Much easier, both on bowl, wedges, and bottom of plastic template. Hot glue is Great stuff!! Emiliano's advise is spot on...but if you don't like to hand cut the corners of the hourglass opening, use other shapes, like an "infinity"...https://bigislandengraving.com/butterfly-inlay-repair-system/#iLightbox[gallery_image_3]/0.
Bill who?