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Bubinga
Bubinga (Guibourtia pellegriniana)

Family: Leguminosae

Common names: Akume, Bubinga, Buvenga, Ebana, Essingang, Irun nduk, Kevazingo, Kevazingu, Lianu, Milne, Moubaka, Mouega, Mutenye, Ovang, Oveng, Waka, Waku

Distributed in: Angola, Cameroon, Congo, Equatorial Guinea, Gabon, Ghana, Nigeria, Zaire (Africa)

Distribution overview: West Africa, primarily in Gabon. Its range overlaps with two other closely related Guibourtia species, G. demeusei (which is more widely distributed from southeastern Nigeria through Cameroon and Gabon to the Congo Basin) and G. tessmannii (which grows mainly in Cameroon).

Common uses: Boat building (general), Boat building, Boxes and crates, Brush backs & handles, Cabinetmaking, Canoes, Carvings, Chairs, Chests, Concealed parts (Furniture), Decorative veneer, Desks, Dining-room furniture, Domestic flooring, Dowell pins, Dowells, Drawer sides, Figured veneer, Fine furniture, Floor lamps, Flooring, Furniture , Furniture components, Furniture squares or stock, Furniture, Handles, Hatracks, Heavy construction, Interior construction, Joinery, Kitchen cabinets, Lifeboats, Living-room suites, Millwork, Mine timbers, Musical instruments, Office furniture, Paneling, Parquet flooring, Plywood, Radio - stereo - TV cabinets, Railroad ties, Rustic furniture, Shafts/Handles, Shipbuilding, Stairrails, Stairworks, Stools, Stringers, Sub-flooring, Tables , Tool handles, Turnery, Utility furniture, Vats, Vehicle parts, Veneer: decorative

Product sources: The ITTO reports that the species is a regular source of timber for export. Three closely similar species of the genus Guibourtia are the source of Bubinga on the market. Highly figured material from the species is referred to in the trade as Kevazingo. The three species are G. demeusei from Nigeria to Congo, G. tessmannii from Cameroon, and G. pellegriniana from Gabon.

Environment profile: Status unsure as a result of insufficient information

Tree size: Trunk diameter is 100-150 cm

Colors: the heart isReddish brown, Yellowand the sapwoodWhite to yellow, Yellow.The grain isWavy, the textureMediumand the lusterLustrous

Natural durability: Very durable, Vulnerable to attack by pinhole borers

Odor: Unpleasent odor associated with freshly milled wood Freshly-Milled wood has a strong unpleasant odor which disappears after the wood is dried

Silica Content: Likely to have significant impact on machining

Kiln Schedules: T2 - C2 (4/4); T2 - C1 (8/4) US

Drying Defects: Slight end splitting, Splitting

Ease of Drying: Moderately Difficult to Difficult

Tree Identification: Bole/stem form is straight

Comments: General finishing qualities are rated as good

Blunting Effect: High to severe

Cutting Resistance: Fairly Difficult to Very Difficult to saw

Gluing: Easy to glue

Mortising: Easy to mortise

Moulding: Easy to mould

Movement in Service: Easy to mould

Nailing: Possible if prebored, Pre-boring recommended

Planing: Responds satisfactorily to all woodworking operations

Resistance to Impregnation: Sapwood is moderately resistant

Response to hand tools: Good response to hand tools

Sanding: Good sanding qualities

Veneering qualities: Various figures can yield decorative veneers Some logs are highly figured and are converted into attractive veneers for decorative applications such as, panelling, inlay work, high class furniture, and fancy turnery work.

Screwing: Good screwing properties ; Turning: Very Good to Excellent Results

Polishing: Good; Staining: Stains very well ; Varnishing: Good;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,8
Density 881 kg/m3
Bending Strength 1132 1704 kg/cm2
Crushing Strength 485 725 kg/cm2
Hardness 1192 kg
Impact Strength cm
Shearing Strength 132 kg/cm2
Stiffness 117 147 1000 kg/cm2
Tangential Shrinkage 8 %
Radial Shrinkage 4 %
Weight 849 833 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 16108 24239 psi
Density 55 lbs/ft3
Hardness 2628 lbs
Maximum Crushing Strength 6899 10324 psi
Shearing Strength 1883 psi
Stiffness 1665 2101 1000 psi
Specific Gravity 0.8
Weight 53 52 lbs/ft3
Radial Shrinkage 4 %
Tangential Shrinkage 8 %
Volumetric Shrinkage 12 %

Max. crushing strength = high
Shrinkage, Tangential = moderate
Density (dry weight) = 53-60 lbs/cu. ft
Density (dry weight) = 46-52 lbs/cu. ft.
Bending strength (MOR) = very high
Bending strength (MOR) = high
Shrinkage, Volumetric = moderate
Shrinkage, Volumetric = fairly large
Shrinkage, Tangential = small
Shrinkage, Tangential = fairly large
Shrinkage, Radial = small
Shrinkage, Radial = fairly large
Modulus of Elasticity (stiffness) = medium
Shrinkage, Volumetric = large
Shrinkage, Tangential = large
Shrinkage, Radial = moderate
Shrinkage, Radial = large
Shearing strength (parallel to grain) = medium
Shearing strength (parallel to grain) = low
Hardness (side grain) = very hard
Hardness (side grain) = hard
Density (dry weight) = 61-67 lbs/cu. ft
Bending strength (MOR) = medium

Bois et Forets des Tropiques,1949,Bubinga (Guiboutia spp,Bois et Forets des Tropiques,No.12,pp429-432Bois et Forets des Tropiques,1977,Bubinga (Guibourtia spp,Bois et Forets des Tropiques,No.173, pp23-35Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchErfurth, T., Rusche, H.,1976,The Marketing of Tropical Wood A. Wood Species from African Moist Forests,F.A.O. Forestry DepartmentFarmer, R.H.,1972,Handbook of Hardwoods,HMSOFrance - C.T.F.T.,1961,Resultats des Observations et des Essais effectues au C.T.F.T. sur Bubinga,(Guibourtia spp.,C.T.F.T.,Information Tec.,No.118France - C.T.F.T.,1966,Bois Tropicaux,C.T.F.T. Publ.,12HMSO.1972.Handbook of Hardwoods.2nd Edition.Revised by R.H. Farmer.Department of the Environment, Building Research Establishment, Princes Risborough Laboratory, Princes Risborough, Aylesbury, Buckinghamshire.Hughes, J.F.,1971,The Principal Timber Trees of Cameroon,Unpublished dataITTO.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.Keay, R.W.J.,1964,Nigerian Trees Vol.2,Nigeria Federal Department of Forest Research, IbadanLincoln, W.A. 1986. World Woods in Color. Linden Publishing Co. Inc., Fresno, California.Organisation for European Economic Co-operation,1951,African Tropical Timber (Nomenclature, Description,OEECRendle, B.J. Editor. 1969. World Timbers, Volume One - Europe & Africa. Published by Ernest Benn Limited, Bouverie House, Fleet Street, London.Rendle, B.J.,1969,World Timbers (3 Vols.,Ernest Benn Ltd. LondonSaint-Aubin, G. de,1963,La Foret du Gabon,CTFT Publ., No.21Sallenave, P.,1955,Proprietes Phyiques et Mecaniques des Bois Tropicaux de l'Union Francaise,C.T.F.TTakahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7
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