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Kentucky coffeetreeKentucky coffeetree
Kentucky coffeetree (Gymno cladus dioicus)

Family:

Common names: Chicot, Coffe nut, Coffetree, Dead tree, Kentucky coffeetree, Kentucky mahogany, Knicker tree, Mahogany bean, Stump tree

Distributed in: Canada, United States (North America)

Distribution overview: The Kentucky coffee tree grows in moist woods, creek banks, and flood plains. It is mainly found in the Midwest from western Ohio to eastern Kansas and Oklahoma, southern Michigan to northern Alabama and Tennessee. The tree was much planted around farm houses and may now be maintained as ornamentals around newer buildings. Often found in floodplain forests, but may appear in other habitats.

Common uses: Bedroom suites, Building construction, Cabinetmaking, Chairs, Chests, Concealed parts (Furniture), Construction, Crossties, Desks, Dining-room furniture, Dowell pins, Dowells, Drawer sides, Fine furniture, Floor lamps, Foundation posts, Fuelwood, Furniture , Furniture components, Furniture squares or stock, Hatracks, Kitchen cabinets, Living-room suites, Office furniture, Posts, Radio - stereo - TV cabinets, Railroad ties, Rough construction, Rustic furniture, Stakes, Stools, Tables , Utility furniture, Wardrobes

Product sources: The commercial importance of Kentucky coffeetree is diminished by its sparse distribution, although it is described as a handsome wood that takes a high polish and finishes to a high luster. With the exception of its growth areas, the wood is very scarce, and is usually marketed in a mixture with other hardwoods. It is priced in the medium range when available.

Environment profile: Vulnerable in parts of its natural habitat

Tree size: Trunk diameter is 100-150 cm

Colors: the heart isPurple, Redand the sapwoodWhite, Yellow.The grain isStraight, the textureResinous and oilyand the lusterMedium

Natural durability: Resistant to termites, Susceptible to insect attack

Odor: No specific smell or taste

Kiln Drying Rate: Naturally dries slowly

Drying Defects: Resin Exudation, Splitting

Ease of Drying: Slowly

Blunting Effect: Moderate

Boring: Fairly easy to very easy

Carving: Fairly Easy to Very Easy

Cutting Resistance: Fairly Difficult to Very Difficult to saw

Gluing: Surface Preparation

Mortising: Fairly Easy to Very Easy

Moulding: Poor to Very Poor

Movement in Service: Poor to Very Poor

Nailing: Tends to split during nailing, Very Good to Excellent

Planing: Fairly Easy to Very Easy

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Responds Readily

Routing recessing: Fairly Easy to Very Easy

Sanding: Fairly Easy to Very Easy

Veneering qualities: Veneers easily, Veneers moderately easy

Steam bending: Fairly Easy to Very Easy

Screwing: Fairly Easy to Very Easy, Holds screws well; Turning: Fairly Easy to Very Easy

Painting: Good; Polishing: Very Good to Excellent; Staining: Very Good to Excellent;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density kg/m3
Bending Strength 799 kg/cm2
Crushing Strength kg/cm2
Hardness kg
Impact Strength cm
Shearing Strength kg/cm2
Stiffness 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage %
Weight kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 11368 psi
Specific Gravity 0.46 0.4


Boone, R.S., C.J. Kozlik, P.J. Bois, E.M. Wengert. 1988. Dry Kiln Schedules for Commercial Hardwoods - Temperate and Tropical. USDA, Forest Service, General Technical Report FPL-GTR-57, Forest Products Laboratory, Madison, Wisconsin.Kaiser, J. 1990. Wood of the Month Annual - Coffeetree:The Tree with the Coffee Taste.Supplement to Wood and Wood Products, September, 1990, Page 14A.Kline, M. 1983. Gymnocladus dioicus - Kentucky coffeetree. In A Guide to Useful Woods of the World. Flynn Jr., J.H., Editor. King Philip Publishing Co., Portland, Maine. Page 185.Little, E.L.1980.The Audubon Society Field Guide to North American Trees - Eastern Region.Published by Arthur A. Knopf, New York.Panshin, A.J. and C. deZeeuw. Textbook of Wood Technology. McGraw-Hill Series in Forest Resources. McGraw-Hill Book Company, New York.USDA. 1987. Wood Handbook - Wood as an Engineering Material, United States Department of Agriculture, Forest Service, Agriculture Handbook No. 72, Forest Products Laboratory, Madison, Wisconsin.USDA. 1988. Dry Kiln Operators Manual, Preliminary Copy. Forest Service, Forest Products Laboratory, Madison, Wisconsin.
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