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New Tote/Knobs and NEW Cracks

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Forum topic by HorizontalMike posted 03-27-2013 11:16 PM 679 views 0 times favorited 11 replies Add to Favorites Watch
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HorizontalMike

6948 posts in 1602 days


03-27-2013 11:16 PM

Topic tags/keywords: cracks totes knobs finishing

To say WTF is a minimum, however one of my new Rosewood Totes developed a slight crack AFTER being shaped and treated with BLO.

QUESTION: Is there any way to tell, or otherwise determine what totes/knobs will crack after shaping? I hate to throw away $$$ after spending so much time shaping and finishing… Surely there is/are methods to prevent this, right?

-- HorizontalMike -- "Woodpeckers understand..."


11 replies so far

View shampeon's profile

shampeon

1378 posts in 872 days


#1 posted 03-27-2013 11:21 PM

First things first. Was the wood dry and acclimated to your shop? Rosewood is pretty stable, but it’ll still crack if there are big moisture changes.

Were there any knots? Turning the blank will relieve some of the stresses in the wood, and knots are good bets for having stress fractures.

If it’s just a small crack, you can fill it up with thin CA glue and rosewood dust, and it’ll probably be almost invisible.

-- ian | "You can't stop what's coming. It ain't all waiting on you. That's vanity."

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HorizontalMike

6948 posts in 1602 days


#2 posted 03-27-2013 11:33 PM

The Rosewood came encased in wax 2×2x8 and was sawn and cut within one week of first cut. Two or four totes show cracks (NOT stress cracks) after being sized and finished with BLO.

-- HorizontalMike -- "Woodpeckers understand..."

View Don W's profile

Don W

15236 posts in 1256 days


#3 posted 03-27-2013 11:33 PM

I had one break right in half while finish sanding. Annoying, but its wood.

-- Master hand plane hoarder. - http://timetestedtools.com

View Kreegan's profile

Kreegan

1452 posts in 835 days


#4 posted 03-27-2013 11:39 PM

If it was in wax, then it almost certainly was not dry. Usually wood is encased in wax or anchorseal while still wet. If just the ends are waxed, then there’s a better chance it’s dry, or at least drier, but you still need to let it acclimate to your shop for a few weeks to a month.

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HorizontalMike

6948 posts in 1602 days


#5 posted 03-27-2013 11:41 PM

OK Don, I hate to admit or even think about it, BUT you are probably correct. It sure pisses me off though, with such a nice tote cracking (even though it is tight and minor) after all the work that went into it. GRrr…

-- HorizontalMike -- "Woodpeckers understand..."

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HorizontalMike

6948 posts in 1602 days


#6 posted 03-27-2013 11:44 PM

Wax on all sides Rich… BLO immediately after turning and cutting totes/knobs… Totes in question are still solid and strong, though not what we all strive for for sure…

-- HorizontalMike -- "Woodpeckers understand..."

View shampeon's profile

shampeon

1378 posts in 872 days


#7 posted 03-28-2013 12:03 AM

Yeah, that sucks and those totes are super nice. Try the CA/sawdust trick. You’ll probably be pleasantly surprised.

-- ian | "You can't stop what's coming. It ain't all waiting on you. That's vanity."

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HorizontalMike

6948 posts in 1602 days


#8 posted 03-28-2013 12:07 AM

@shampiom,
Yeah I might try that. I did save some Rosewood sawdust, and besides, I picked up a couple more pieces of Rosewood from WC this weekend. I actually did one fill with TightBond III and the RW sawdust already. Sure makes you knee-jerk after all the labor of love you have put into it. Just saying…

-- HorizontalMike -- "Woodpeckers understand..."

View George Coles's profile

George Coles

98 posts in 1133 days


#9 posted 03-28-2013 12:53 AM

May be off track but I seem to remember someone freezing the timber first, then thawing at workshop temp for a week, then turning it. Dont know if this helps or not but it would keep moisture content equal.

-- George Coles, Antipolo, Philippines

View Kreegan's profile

Kreegan

1452 posts in 835 days


#10 posted 03-28-2013 02:03 PM

http://en.wikipedia.org/wiki/Linseed_oil#Wood_finish

BLO provides pretty much no barrier to moisture, either coming in or going out.

View HorizontalMike's profile

HorizontalMike

6948 posts in 1602 days


#11 posted 03-28-2013 04:04 PM

Rich,
Isn’t that true of nearly all finishes as well? They just “slow up” the rate of change of the moisture in the wood.

-- HorizontalMike -- "Woodpeckers understand..."

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