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How do I save this bowl?

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Forum topic by Rick M. posted 09-16-2013 04:04 PM 1303 views 0 times favorited 23 replies Add to Favorites Watch
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Rick M.

4509 posts in 1134 days


09-16-2013 04:04 PM

Topic tags/keywords: bowl repair

If you look toward the back, about the one o’clock position, you can see a missing chunk. The bowl broke off my Nova chuck and when remounted, doesn’t want to stay. I don’t think I have enough bottom left to use a screw chuck. I thought of using a glue block but not sure how I would get it back out. Also I have no Longsworth or Cole jaws so I can fix the bottom. Ideas?

-- http://thewoodknack.blogspot.com/


23 replies so far

View TheDane's profile

TheDane

3997 posts in 2417 days


#1 posted 09-16-2013 04:14 PM

That’s a bummer, Rick. That is a gorgeous piece of wood.

How much work do you have left to do? Is the inside hollowed or do you still need to take out more material?

You could use a face plate with a plywood disk along with your live center on the tailstock to work on the bottom … I would suggest making a ‘soft touch’ for your live center.

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

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Rick M.

4509 posts in 1134 days


#2 posted 09-16-2013 06:31 PM

The inside is about 1/2 done.

-- http://thewoodknack.blogspot.com/

View JoeinGa's profile

JoeinGa

3703 posts in 760 days


#3 posted 09-16-2013 07:20 PM

Do you have any more of that wood? If yes, it appears you have a “hollow” on the bottom and maybe you could cut a “plug” to fill that hollow. Glue it in and have a flat-bottomed bowl, instead of one with the hollow

I’m not a turner, just trying to brainstorm an idea here for ya.

-- Perform A Random Act Of Kindness Today ... Pay It Forward

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Rick M.

4509 posts in 1134 days


#4 posted 09-16-2013 07:56 PM

Joe, sometimes the best ideas come from the outside looking in. Unfortunately I don’t have more and even more unfortunate is the piece that broke off disintegrated so I can’t glue it back on. This is/was a spalted silver maple burl.

Edit: Since I’m in no hurry, I’ll build a set of cole jaws for my Nova, fix the bottom then glue in a block of padauk and just leave it. It’ll make a nice contrast.

-- http://thewoodknack.blogspot.com/

View Wildwood's profile

Wildwood

1246 posts in 888 days


#5 posted 09-16-2013 08:06 PM

Can a waste block sit flat and centered in recess?

Would turn a waste block smaller diameter than recess so chuck can grip and hold once waste block glued in. Have to insure glue block almost perfectly centered before gluing. I would use carpenter glue and wait a day to turn. Had bad luck using CA glue.

I would use my center finder to find and mark center on bottom of the bowls recess. Talking about using an awl to make small indent (hole) center of the recess. Same thing with waste block, only would drill hole in center of waste block so could use a nail or screw to find indent made in recess.

Have mounted waste block in chuck with nail sticking out 1/8” or 3/16”, applied glue, married up nail with indent (hole) in base of bowl brought up the tailstock to clamp in place for glue to dry.

I used a homemade donut chuck for revere turning where completely turn away waste block.

-- Bill

View TheDane's profile

TheDane

3997 posts in 2417 days


#6 posted 09-16-2013 09:14 PM

Rick … When you solve the problem and finish the bowl, post a followup. I’d like to know how you fixed it and see the end result!

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

View lew's profile

lew

10166 posts in 2509 days


#7 posted 09-16-2013 09:25 PM

How about building a doughnut chuck-

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

View Jimbo4's profile

Jimbo4

1183 posts in 1516 days


#8 posted 09-16-2013 09:41 PM

Rick – I believe Lew has the best idea. I made one and have used it several times to finish irregular turnings.

-- *Arachnoleptic Fit*: The frantic dance performed just after you've accidently walked through a spider web.

View Rick M.'s profile

Rick M.

4509 posts in 1134 days


#9 posted 09-16-2013 10:42 PM

Wow Lew, that’s some contraption. I’ll have to think about that.

-- http://thewoodknack.blogspot.com/

View Randy_ATX's profile

Randy_ATX

695 posts in 1195 days


#10 posted 09-16-2013 11:02 PM

Rick are you certain of the species? I would have bet money that was a piece of live oak. I’ve got a lot of it that looks just like yours. Best of luck fixing it.

-- Randy -- Austin, TX by way of Northwest (Woodville), OH

View alexdom_89's profile

alexdom_89

98 posts in 1050 days


#11 posted 09-16-2013 11:08 PM

What about jam chucking it and support it with the tail stock to recut a tennon I’ve done this with burly mesquite

View Nubsnstubs's profile

Nubsnstubs

258 posts in 484 days


#12 posted 09-17-2013 01:22 AM

Rick, how big is the recess, and how deep is it? If possible, glue in a waste block, turn a tenon on it, correct the break at the recess or eliminate the recess completely. Put the tenon in the chuck and turn the bowl to completion.
If I can post a picture, I’ll show you what to use to finish the bottoms of all my forms. I’ve been using it for almost a year now without issues. Donut chucks are dangerous, a Longworth might hold it if you turn slowly and take micro cuts. A vacumm chuck might do it, but has limitations also…
I think I successfully uploaded a picture. If you have any questions, I have other tools that work together with this live center. Ask, and I’ll show what have.
The picture shows a threaded live center with struts and wheels. The struts have 1” adjustment combining with the live center body allowing up to 3 1/4” total distance from nose to end of wheels. Pedastal bases up to that distance are easy, as long as it’s only 2 3/4” wide.
BTW, that’s a nice looking piece of oak. it needs to be saved.. ..... ...... .....Jerry (in Tucson)

-- Jerry (in Tucson)

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Rick M.

4509 posts in 1134 days


#13 posted 09-17-2013 03:58 AM

Jerry that’s an interesting gizmo.

A lot of people recommended a jam chuck so I thought I’d give that a try since it only takes a minute to make one. And although my lathe is very cramped, it was working… BUT, the wood down there is too far gone, too spalted, which is why it came off the chuck in the first place. I’ll pick up some wood hardener and soak it down, try again.

Oh, and I don’t know where silver maple burl came from, lol, it’s none of those things; it’s crotch oak. Must be the Mad Cow setting in.

You can see how cramped I am for space.

-- http://thewoodknack.blogspot.com/

View Nubsnstubs's profile

Nubsnstubs

258 posts in 484 days


#14 posted 09-17-2013 05:18 AM

Gizmo????? That’s a serious tool. I invented it. Made the live center from 1 3/4” bar stock, turned the MT2 taper, threaded the body, and strut ring on a lathe. The only things I bought was the bar stock, bearings, bolts and wheels. The rest came from my mind, plus a friends generosity letting me use his mill and lathe. And to top it off, I’m a cabinet maker, not a machinist.
I use this tool , Live Center Steady with my Chuck Plate I also invented. I use it for forming tenons and the general outside shape of my forms, then again at the tenon removing stage. It’s used with a large plate or plug as a jam chuck. The Live Center Steady is used to apply pressure to keep the form between centers to remove the tenon and sand the bottom while still between centers. I’ve done at least 50 forms, and only lost 2, and that was when it was first designed with no experience with it. I almost gave up, but kept on trying until I can’t turn without it now.
Boy, you are crowded. What lathe do you have and what is your taper in the quill? If your bottom is flat, you’re still good to go for a waste block and turn a tenon on it. That would disperse the pressures better than that tailstock support you’re showing …............. Jerry (in Tucson)

-- Jerry (in Tucson)

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Rick M.

4509 posts in 1134 days


#15 posted 09-17-2013 06:17 AM

Sorry Jerry, didn’t mean anything negative; it’s impressive, I just didn’t know what to call it. I’d love to see a video of it in action.

Lathe is a 50’s era Craftsman/King Seeley 9×30; 1MT head & tail. It’s actually a decent lathe for spindles.

The bottom of the bowl is not quite flat. I originally turned this some months back and it’s moved a little out of shape since then. The jam chuck worked well enough but the base is just so punky.

-- http://thewoodknack.blogspot.com/

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