Buckthorn (Rhamnus L.)


Bombarde16

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Those of you not familiar, it's a miserable invasive tree here in the midwest.  Ugly, gnarled beasts that drop an annual mess of squishy, purple berries all over the place.  We just had one taken down on our property.  The folks who did the deed merely chopped things into 4'-6' lengths and left them near the back fence.  I took those down to fireplace length and stacked them but, just out of sheer curiosity, decided to split one of the widest (ca 8") pieces to see if I could make a few boards.

 

With the help of a sled, I got some straight cuts and have a promising harvest of what look to be tool handles in the making.  The heartwood has a mild, pinkish straw color with very tight, hard grain.  Currently green, it cuts nicely with a sharp blade and we'll see how it behaves as it dries.

 

 

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Common Name(s): Buckthorn

Scientific Name: Rhamnus spp. (Rhamnus cathartica, R.purshiana, etc.)

Distribution: Widespread throughout Europe, North America, Asia, and northern Africa

Tree Size: 15-30 ft (5-10 m) tall, 6-8 in (15-20 cm) trunk diameter

Average Dried Weight: 38 lbs/ft3 (605 kg/m3)

Specific Gravity (Basic, 12% MC): .50, .61

Janka Hardness: 1,040 lbf (4,630 N)

Modulus of Rupture: 8,700 lbf/in2 (60.0 MPa)

Elastic Modulus: 960,000 lbf/in2 (6.62 GPa)

Crushing Strength: 6,080 lbf/in2 (41.9 MPa)

Shrinkage: Radial: 3.2%, Tangential: 4.6%, Volumetric: 7.6%, T/R Ratio: 1.4

I was going to ask some questions about the hardness of Buck Horn, just looked it up instead.

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  • 4 weeks later...

My experience with it around the mill is that if you don't remove the pith the pieces will split pretty badly. I have a bunch of it cut into small pieces for turning, knife handles, pen blanks etc... I also covered every piece with AS2 to help prevent checking. So far my methods have worked well in keeping the stuff whole. How is yours doing at this point?

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Makes sense that Hobbit House would have the skinny on it.  I gather that's a big turners' site and the trees are such wretched little punks as to attract little more than turners' interest.

 

So far, so good.  a.) It's only been a month, b.) northern Illinois is a swamp during the summer and c.) the pieces are stickered in my basement.  So there's nothing rushing the drying process right now.  Heck, they may well be gaining MC right now...

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  • 4 weeks later...

Makes sense that Hobbit House would have the skinny on it.  I gather that's a big turners' site

 

Hm ... that's interesting. I've never heard my site referred to specifically as a "turner's site" before. I think it appeals to all wood craftspeople.

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