Search for

Clicking any heading in the main data area (at right) will scroll the page back to this top position. Use the following links to jump to the associated section in the main data. Blunting Effect Boring Carving Comments Common Names Common Uses Countries of Distribution Cutting Resistance Distribution Overview Drying Defects Ease of Drying Environmental Profile Family Name Gluing Grain Heartwood Color Kiln Drying Rate Kiln Schedules Luster Mortising Moulding Movement in Service Nailing Natural Durability Numerical Data Odor Planing Polishing References Regions of Distribution Resin Content Resistance to Impregnation Response to Hand Tools Routing & Recessing Sanding Sapwood Color Scientific Name Screwing Silica Content Strength Properties Texture Toxicity Trade Name Tree Identification Tree Size Turning Veneering Qualities Scientific Name Dialium dinklagei Trade Name Eyoum Family Name Leguminosae Common Names Afambeou, Dina, Eyoum, Eyum, Kerandji, Keranji, Khleng, Kralanh, Xoay Regions of Distribution Africa Countries of Distribution  [VIEW MAP] Benin, Cameroon, Congo, Equatorial Guinea, Gabon, Ghana, Guinea, Ivory Coast, Liberia, Nigeria, Sierra Leone, Togo Common Uses Crossties, Domestic flooring, Flooring, Flooring: industrial heavy traffic, Handles, Medicinal use, Parquet flooring, Railroad ties, Shafts/Handles, Sub-flooring, Tool handles, Turnery Environmental Profile Status has not been officially assessed Distribution Overview West Africa, extending from Guinea to Gabon to the Congo; sometimes in marshy places. Heartwood Color White Brown Yellow Red Orange Green/grey Dark brown Pale red to pink Dark brown Black Same as sapwood Sapwood Color White Yellow Brown Red White to yellow Clearly differentiated from the heartwood Grain Even Straight Straight Texture Medium Fine Coarse Fine Luster Medium Natural Durability Susceptible to insect attack Non-resistant to termites Non-resistant to powder post beetles Perishable Non-resistant to marine borers Non-durable Very durable The heartwood has high natural resistance to decay Odor No specific taste May have a slightly disagreeable smell when green Silica Content Highly siliceous Resin Content Contains resin Toxicity Respiratory effects Dermatitic effects Kiln Schedules Dry at a slow speed Drying Defects Distortion Splitting Checking Ease of Drying Fairly Easy Rapidly Moderately Difficult to Difficult Requires special attention Slowly Dries slowly Quartersawn material dries more easily and degrades less Kiln Drying Rate Naturally dries quickly Tree Identification Bole/stem form is buttressed Tree Size Bole length is 20-30 m Tree height is 20-30 m Tree height is 10-20 m Bole length is 10-20 m Tree height is 30-40 m Trunk diameter is 100-150 cm Comments General finishing qualities are rated as good The bark and leaves of the tree are used locally for medicinal purposes Blunting Effect Little Blunting effect on sawing green wood is severe Blunting effect on sawing dry wood is severe Blunting effect on machining is severe The wood tends to dull tool edges severely and rapidly Boring Fairly difficult to very difficult Fairly easy to very easy Fair to good results Carving Fair to Good Results Fairly Easy to Very Easy Cutting Resistance Easy to saw Moderate to saw Cutting Resistance with dry wood is difficult Gluing Fairly Easy to Very Easy Fair to Good Results Satisfactory gluing properties Moderate gluing properties Mortising Fairly Easy to Very Easy Fair to Good Results Moulding Fairly Easy to Very Easy Fair to Good Results Very Good to Excellent Results Movement in Service Stability is rated as medium Nailing Fairly Easy to Very Easy Fair to Good Results Pre-boring recommended Holds nails well Planing Fairly Easy to Very Easy Fair to Good Results Very Good to Excellent Results The timber is reported to yield smooth surfaces, but it is difficult to work with ordinary tools Resistance to Impregnation Resistant heartwood Permeable heartwood Permeable sapwood Resistant sapwood Heartwood is very resistant Sapwood is resistant Sapwood is resistant Response to Hand Tools Easy to Work Fairly Difficult to Difficult to Work Difficult to machine Routing & Recessing Fair to Good Results Fairly Easy to Very Easy Sanding Fairly Easy to Very Easy Very Good to Excellent Results Fair to Good Results Very Good Sanding Properties Screwing Fairly Easy to Very Easy Fair to Good Results Possible if prebored Good screw holding properties Turning Fairly Difficult to Very Difficult Fairly Easy to Very Easy Fair to Good Results Veneering Qualities Veneers easily Suitable for peeling Veneers moderately easy No drying degrade Suitable for slicing Polishing Poor to Very Poor Results Fair to Good Results Very Good to Excellent Results Fairly Easy to Very Easy Good results Strength Properties Shrinkage, Tangenital =moderate Shrinkage, Radial = small Shrinkage, Radial = moderate Modulus of Elasticity (stiffness) = medium Modulus of Elasticity (stiffness) = high Max. crushing strength = very high Max. crushing strength = high Density (dry weight) =53-60 lbs/cu. ft. Density (dry weight) = 61-67 lbs/cu. ft Density (dry weight) = 46-52 lbs/cu. ft. Bending strength (MOR) = very high Bending strength (MOR) = medium Bending strength (MOR) = high Numerical Data Item Green Dry English Bending Strength 14895 18769 psi Density 55 lbs/ft3 Maximum Crushing Strength 8467 10774 psi Stiffness 1667 2052 1000 psi Specific Gravity 0.65 Weight 53 43 lbs/ft3 Radial Shrinkage 3 % Tangential Shrinkage 7 % Volumetric Shrinkage 13 % Item Green Dry Metric Bending Strength 1047 1319 kg/cm2 Density 881 kg/m3 Maximum Crushing Strength 595 757 kg/cm2 Stiffness 117 144 1000 kg/cm2 Specific Gravity 0.65 Weight 849 689 kg/m3 Radial Shrinkage 3 % Tangential Shrinkage 7 % References Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building Research Bolza, E.,1976,Timber and Health,Div. Building Res. C.S.I.R.O. Australia Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.