Lokundu (Newtonia buchananii)
Family: Leguminosae
Common names: Acacia, Chikwani, East African newtonia, Forest newtonia, Lokundu, Lupewere, Mafamuti, Makuruma, Mkufi, Mkwerenyani, Mnyassa, Mofu, Mpehere, Mpewere, Mruga, Mseri, Mshashita, Muchenche, Mufomoti, Mujairaya, Mujerairo, Mukoi, Mukui, Mukunga, Mutole, Mutoyo, Mwosi, N'singa, Newtonia, Nkwerenyani, Omukungu, Pehere, Singa-singa, Umukerekwa
Distributed in: Angola, Cameroon, Kenya, Malawi, Mozambique, Rwanda, South Africa, Tanzania, Uganda, Zaire, Zambia, Zimbabwe (Africa)
Distribution overview: The species occurs in Central and East Africa.
Common uses: Bedroom suites, Boat building (general), Boat building, Boxes and crates, Broom handles, Building materials, Cabinetmaking, Canoes, Carvings, Casks, Chairs, Chests, Concealed parts (Furniture), Core Stock, Decorative veneer, Desks, Dining-room furniture, Domestic flooring, Dowell pins, Dowells, Drawer sides, Excelsior, Factory flooring, Figured veneer, Fine furniture, Floor lamps, Flooring, Furniture , Furniture components, Furniture squares or stock, Furniture, Hatracks, Heavy construction, Interior construction, Interior trim, Joinery, Kitchen cabinets, Lifeboats, Light construction, Living-room suites, Millwork, Moldings, Office furniture, Packing cases, Paneling, Parquet flooring, Plywood, Railroad ties, Shipbuilding, Tables, Toys, Turnery, Vehicle parts, Veneer, Wheel spokes, Wheels
Environment profile: Data source is World Conservation Monitoring Center
Vulnerable in Uganda
Colors: the heart isReddish brown, Yellow to golden-yellow to orangeand the sapwoodWhite to yellow, Whitish.The grain isStripe (figure), the textureMedium coarse to coarseand the lusterSlightly lustrous
Natural durability: Susceptible to marine borer attack, Susceptible to pinhole borers
Odor: No specific smell or taste
LightInduced Color Change: Darker
Kiln Schedules: UK=J US=T10D5S/T8D4S Fr=4
Kiln Drying Rate: Rapid (<10 days for boards < 32 mm, to <30 days for boards >= 63 mm)
Drying Defects: Slight surface checking, Slight twist/warp
Ease of Drying: Easy
Tree Identification: Bole/stem form is straight
Comments: General finishing qualities are rated as good Soft to moderately hard Timber properties vary depending upon the origin
Blunting Effect: Medium dulling effect on cutting edges
Boring: Difficult
Carving: Good results
Cutting Resistance: Low cutting resistance
Gluing: Easy to glue
Mortising: Finishes poorly
Moulding: Easy to mould
Movement in Service: Easy to mould
Nailing: Possible if prebored, Pre-boring recommended
Planing: Special attention required
Resistance to Impregnation: Sapwood is moderately resistant
Response to hand tools: Responds well to hand tools
Sanding: Good sanding finish
Veneering qualities: Easy to cut, There is slight to moderate drying degrade and the potential for buckles and splits
Steam bending: Poor
Turning: Fairly easy turning, boring, mortising and other machining operations
Polishing: Satisfactory; Staining: Finish is generally satisfactory
; Varnishing: Good;
- Numerical data Metric
- Numerical data English
- Strength properties
- References
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Item |
Green |
Dry |
Metric |
Specific Gravity |
0,43 |
0,62 |
|
Density |
|
560 |
kg/m3 |
Bending Strength |
633 |
978 |
kg/cm2 |
Crushing Strength |
|
79 |
kg/cm2 |
Hardness |
|
499 |
kg |
Impact Strength |
63 |
71 |
cm |
Shearing Strength |
|
114 |
kg/cm2 |
Stiffness |
96 |
122 |
1000 kg/cm2 |
Tangential Shrinkage |
5 |
|
% |
Radial Shrinkage |
2 |
|
% |
Weight |
544 |
544 |
kg/m3 |
Maximum Load |
0,63 |
0,84 |
cm-kg/cm3 |
Toughness |
|
369 |
cm-kg |
Static Bending |
|
640 |
kg/cm2 |
|
 |  |  |  | Item | Green | Dry | English | Bending Strength | 9016 | 13917 | psi | Crushing Strength | | 1137 | psi | Density | | 35 | lbs/ft3 | Hardness | | 1102 | lbs | Impact Strength | 25 | 28 | inches | Maximum Crushing Strength | 4283 | 7019 | psi | Shearing Strength | | 1627 | psi | Static Bending | | 9104 | psi | Stiffness | 1371 | 1740 | 1000 psi | Toughness | | 321 | inch-lbs | Work to Maximum Load | 9 | 12 | inch-lbs/in3 | Specific Gravity | 0.43 | 0.62 | | Weight | 34 | 34 | lbs/ft3 | Radial Shrinkage | 2 | | % | Tangential Shrinkage | 5 | | % | Volumetric Shrinkage | 8 | | % | |
Max. crushing strength = medium 0 Hardness (side grain) = soft 0 Bending strength (MOR) = medium 0 Shearing strength (parallel to grain) = low 0 Modulus of Elasticity (stiffness) = low 0 Density (dry weight) = 31-37 lbs/cu. ft. 1 Shrinkage, Radial = very small 0 Shrinkage, Tangential = very small Toughness-Hammer drop (Impact Strength) = low Bending strength (MOR) = low Shrinkage, Tangential = small Modulus of Elasticity (stiffness) = very low Shrinkage, Radial = small Shearing strength (parallel to grain) = very low Density (dry weight) = 38-45 lbs/cu. ft. Shearing strength (parallel to grain) = medium Modulus of Elasticity (stiffness) = medium Weight = medium Very dense Shrinkage, Volumetric = small Shrinkage, Tangential = moderate Resists denting and marring Density (dry weight) = 46-52 lbs/cu. ft. Density (dry weight) = 23-30 lbs/cu. ft. Compression strength (parallel to grain) = high Bending strength (MOR) = high The species has high bending strength in the air-dry condition (about 12 percent moisture content). It compares favorably with Teak, which also has high bending strength. Strength in compression parallel to grain is in the high range. Other species in this range include Teak, White oak, and Hard maple
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