Thread: How stable are burls?
29th Nov 2005, 04:46 PM #1
How stable are burls?
We all need to be careful, and consider seasonal movement with timber. Some speciers are worse than others, grain direction etc., but are burls better or worser than normal type timber for a given species?Boring signature time again!
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29th Nov 2005, 06:50 PM #2
Yes & No.
The grain is confused so the shrinkage is unpredictable.
Some of them will crack while others don't.
Often the cracks are only short & not straight so it is possible to make a feature out of them by filling them with something that will polish up & take the same finish as applied to the rest of the piece. Something dark is best.
You can also get stuck into it with a carving tool, sander, wirewheel, or pyrography (sp?) tool & burn the crack to make it more rustic looking.Cliff.
If you find a post of mine that is missing a pic that you'd like to see, let me know & I'll see if I can find a copy.
29th Nov 2005, 07:07 PM #3
So you are saying they are predictably unpredictable?Stupidity kills. Absolute stupidity kills absolutely.
29th Nov 2005, 07:25 PM #4
Sometimes they are but somtimes they aren"tRegards, Bob Thomas
29th Nov 2005, 07:44 PM #5Registered
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If the base of the burl is flat, they are stable.
If the base is rounded the buggers are very UNstable. :eek:
29th Nov 2005, 07:48 PM #6
In my experience Coolibah is very stable,Red Gum unstable, Mallee so so, Myrtle unstable, Tassie Eucalyptus bloody unstable, Yellow Box, White Box, Grey Box OK, Red Box tends to split. This is from rough turning bowl blanks.
BarryIf it walks like a duck, talks like a duck and looks like a duck then it's a friggin duck.
30th Nov 2005, 07:37 PM #7
Thanks peoples. I cut a dead burl from a yellow box ages ago, cut it into about 18mm slices straight away, they bowed and twisted a bit straight off. I put this down to internal stresses and all. After a few months nothing untoward had happened so I hooked in and used it all.
I have a few ideas to use more, but am concerned about mitres opening etc. Sounds like it might be suck it and see a bit.
Yellow box can split a bit. I might try some Red Gum, if I can find any on a dead tree. I can get Blakely's red gum, not Camaldulensis, but it'sd all worth a try.Boring signature time again!