George Vondriska

Repair a Cracked Bowl Blank

George Vondriska
Duration:   4  mins

Description

If you’re a woodturner, CA glue is one of your best friends. It’s perfect for doing spot repairs on your bowls and spindles. There are a variety of viscosities of cyanoacrylate glue available. I typically use medium or thick for these repairs. Accelerator for the glue isn’t a must, but it’s handy to have.

In this case I was turning a three-cornered bowl and was pretty far along in the process when a weak spot in the bowl blank showed up; a split right along the grain. Instead of discarding the bowl, I grabbed CA glue, accelerator and some masking tape and started the repair.

Sequence of Events

If you’re using an accelerator, that should get applied before the glue. Accelerator has a long open time, CA glue has a short open time. So it makes sense to apply the accelerator first. You should also be careful about how much accelerator you use. If you’ve used it before and seen your CA glue crystalize, that means you used too much accelerator. This weakens the joint.

Spritz a little accelerator into the bad spot in your bowl blank, followed by applying your CA glue. Have masking tape (this is your clamp) nearby so you can move quickly once the glue is in place. Use the tape to “clamp” your repair, and in a few minutes you’ll be back to working your wood bowl blank.

Bowl turning? We’ve got you covered.

We’ve got a lot of information on the site about wood turning bowl blanks. Whether you’re a complete beginner, or have a few bowls already done, there will be content in our bowl turning section that helps you out.

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2 Responses to “Repair a Cracked Bowl Blank”

  1. Daria Konovkina

    Do you know if the glue goes chemically in contact with food? Is it safe to use such glued bowls for liquids and food in the future?

  2. Dennis Satrum

    I have also used my shop vac to pull the glue through the project. On one particular bowl I was refinishing i could tell by the sound there was a hair line Crack, with the shop vac I was able to draw the glue threw the Crack.

I am nearly done with this three point bowl and much to my chagrin, look at this. Little bit of a crack there. There were some cracks in the blank when I started. There's one right there, and I filled it before I started turning. This one developed after. Not really much of an issue because CA glue, cyanoacrylate, is gonna fix this. If you're gonna turn bowls, you gotta have this stuff on hand all the time. So, here's the magic. What I'm gonna do is I'm just kind of testing how far I can pull that open without being destructive. I'm gonna do a little shot of accelerator in here. If you're doing accelerator along with CA glue, do the accelerator first, 'cause this doesn't really have an open time. You can spray this minutes before you need it and it'll still be viable. Where the CA glue does have a very short open time. So, I'm using accelerator, not because you necessarily have to, but because it's gonna move the process along a little bit for us. And you wanna be careful with how much accelerator you use. If you use too much, it'll actually crystallize the glue, and it'll adversely affect the bond strength. So, now, this is where, as I pull this open, we'll get some CA to go in there. And what I find often, this is thick. And the reason I went with a thicker one, so thick or medium would have been okay, is I don't wanna use a thin one. It's just gonna run through and be dripping all over everything. So, now that it's kind of laying on there, I find if I do this, that seems to kind of pump the glue down into the crack, and then I'm gonna hold that closed, and use this fancy clamp. I should have torn a piece off before I started. And the CA glue bonds really quickly. But, the last thing I wanna do is take a chance that I'm coming after this bowl again before the glue grabs. So, I'd rather throw some tape on here so I don't have to stand here and hold this. Give it a couple of minutes, and then we'll come back and see if I am or am not successful with my repair. Usually it works great. See what we got. All right, well, that looks good. But, here will be the real test. Let's do a little sanding on this thing. Gotta get a little more glue residue off, but the repair is holding. And I think what I'll do, it's just a little, a little gappy right there. So, for this one, what I'm gonna do is come back. I'm gonna fill those gaps with a little more glue. But, I'm happy with the way it could withstand the pressure of my sanding operation. So, the bottom line here is I have brought many bowls back to life. Worst case scenario, I had an edge catch on a big southern yellow pine bowl I was doing, and it actually shattered the bowl. Parts blew off like shrapnel. But, I found all the parts, used CA glue to put them all back on, and the bowl itself is fine. So, good thing to have in your arsenal, CA glue. And if you need it, it's a way that you can get your bowls knitted back together so that you can wrap them up successfully. Gonna get a little bit more glue on this one. It's gonna be just fine.
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