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Grumixava
Grumixava (Micropholis guianensis)

Family: Sapotaceae

Common names: Apixuna, Barilla de agua, Caimitillo, Chupon Colorado, Faux balata, Grumixava, Hacano, Ibira camby, Koes, Koesiri balatarie, Moraballi, Riemhout

Distributed in: Argentina, Bahamas, Brazil, Cuba, Dominican Republic, French Guiana, Guyana, Haiti, Jamaica, Peru, Puerto Rico, Suriname, Venezuela (Central America, Latin America)

Distribution overview: The species is widely distributed from Costa Rica, Puerto Rico, and the Lesser Antilles to Peru, Bolivia, and Espirito Santo, Brazil.

Common uses: Beams, Bent Parts, Building construction, Building materials, Cabin construction, Cabinetmaking, Chairs, Chests, Concrete formwork, Construction, Decks, Decorative veneer, Desks, Dining-room furniture, Domestic flooring, Drawer sides, Factory construction, Factory flooring, Figured veneer, Fine furniture, Flooring, Form work, Foundation posts, Framing, Furniture , Furniture components, Furniture squares or stock, Hatracks, Heavy construction, Interior construction, Interior trim, Joists, Kitchen cabinets, Light construction, Living-room suites, Millwork, Moldings, Office furniture, Parquet flooring, Porch columns, Turnery

Environment profile: Data source is Nature Conservancy

Tree size: Trunk diameter is 150-200 cm

Colors: the heart isRed, Yellowish-Green hue and the sapwoodWhite, Yellow.The grain isStraight, the textureMediumand the lusterMedium

Natural durability: Susceptible to insect attack, Very durable

Odor: No specific smell or taste

Silica Content: Likely to have significant impact on machining

Kiln Drying Rate: Naturally dries slowly

Drying Defects: Slight surface checking, Splitting

Ease of Drying: Slowly

Blunting Effect: May be rapid and severe depending on silica amount

Boring: Straight grained wood bores well

Cutting Resistance: Straight grained wood has low resistance

Planing: Very Good to Excellent

Resistance to Impregnation: Sapwood is moderately resistant

Response to hand tools: Fairly Difficult to Difficult to Work

Sanding: Very Good to Excellent Results

Turning: Turns with moderate ease

Polishing: Fair to Good;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,61 0,67
Density 769 kg/m3
Bending Strength 939 1301 kg/cm2
Crushing Strength 48 79 kg/cm2
Hardness 662 kg
Impact Strength cm
Shearing Strength 148 kg/cm2
Stiffness 170 203 1000 kg/cm2
Tangential Shrinkage 8 %
Radial Shrinkage 6 %
Weight 833 753 kg/m3
Maximum Load 0,77 1,12 cm-kg/cm3
Toughness 144 cm-kg
Static Bending 564 852 kg/cm2
Item Green Dry English
Bending Strength 13357 18512 psi
Crushing Strength 696 1137 psi
Density 48 lbs/ft3
Hardness 1460 lbs
Maximum Crushing Strength 6478 9624 psi
Shearing Strength 2107 psi
Static Bending 8026 12123 psi
Stiffness 2421 2891 1000 psi
Toughness 125 inch-lbs
Work to Maximum Load 11 16 inch-lbs/in3
Specific Gravity 0.61 0.67
Weight 52 47 lbs/ft3
Radial Shrinkage 6 %
Tangential Shrinkage 8 %
Volumetric Shrinkage 14 %

Weight = very high
Resists denting and marring
Hardness (side grain) = medium
Density = high
Compression strength (parallel to grain) = very high
Bending strength (MOR) = very high

Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.ITTO. 1986. Tropical Timber Atlas, Volume 1 - Africa. International Tropical Timber Organization (ITTO) and Centre Technique Forestier Tropical (CTFT, 45bis, Avenue de la Belle Gabrielle, Nogent-sur-Marne Cedex, France.Wangaard, F.F., W.L. Stern, and S.L. Goodrich. 1955. Tropical Woods - Properties and Uses of Tropical Woods, Volume V, No. 103. School of Forestry, Yale University, New Haven, Connecticut.
*Come interpretare i dati (manleva su eventuali imprecisioni)