MUBALA (Pentaclethra macrophylla)
Nombre comercial
Mubala
Nombre científico (con autor)
Pentaclethra macrophylla Benth.
Familia
LEGUMINOSAE
Nombres Comunes
Okpagha (Nigeria); Apara (Nigeria); Ovala (Côte d`Ivoire); Ebé (Gabon); Essiri (Congo); Mubala (Cameroon); Mbalaka (Cameroon); Kombolo (Cameroon); Ebé (Cameroon); Ebaye (Cameroon); Bemba (Cameroon); Wild locust; Ukpakara; Ukpaghan; Ukana; Ugba; Tshibambabamba; Tsaklo; Owala; Ovala; Otiabor; Opaga; Okuw; Okpagha; Oil bean tree; Ogba; Nsangabare; Nkpa; Moulla-panza; Mouala; Mbala; Mba; M`vanza; Lubamba; Kommott; Kombolo; Kenuri; Kekung; Gbiah; Gbangban; Fawei; Fakha; Fai; Fae; Faa; Fa-wuli; Fa; Essiri; Ekuana; Ekuama; Eklo; Ebe; Ebal; Djong-tu; Combolo; Blay-bu; Bemba; Bbiah; Bali; Bala; Atta bean; Atowa; Atewa; Ateba; Atawah; Atawa; Ataa; Apara; An-fal; Althawah; Akpaka; Mubala
DESCRIPCIÓN DEL ÁRBOL
Descripción botánica
The tree reaches a height of 15 to 40 m, with diameters of 100 cm. The bole is often irregular, unbuttressed or low buttressed, with a fluted base. It may be up to 6 to 10 m in length.
Hábitat natural
Pentaclethra macrophylla occurs in closed forests, along riverbanks. It is dominant in secondary forests.
IDENTIFICACIÓN DE LA MADERA
Descripción anatómica de la madera
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 150 to 200 micras (medium). White deposits in heartwood vessels. Vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel- Axial parenchyma lozenge-aliform. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 3 to 4 cells per parenchyma strand. 4 to 10 rays per mm (medium). Rays non-storied. Rays 1 to 2 seriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Non-septate fibers. Fibers with simple to minutely bordered pits.
Disponibilidad
Status de protección por CITES
Unrestricted
DESCRIPCIÓN GENERAL DE LA MADERA
Color
The sapwood is pale grey-brown or white, it has a thickness of 2.5 to 5 cm. The heartwood is red-brown, it is sapwood and heartwood are not always differentiated.
Grano
Straight or slightly interlocked, sometimes with an influence on further processing operations.
Veta
The wood is reported to be frequently medium textured.
Durabilidad Natural
Moderately durable to decay. Without preservative treatment, this species can be used when risks of occasional re-humidification, but it is not suited for uses with risks of permanent or long-lasting humidification.
Indice de Durabilidad Natural (1=Muy alta, 7=Muy baja)
3
Contenido de sílice
Silica Content: Negligible content of silica is reported. Amounts over 0.05% may affect wood processing. Silica Value: 0.02
PROPIEDADES FÍSICAS DE LA MADERA
Densidad Básica (Peso anhidro/Vol. saturado) (g/cm³)
0.82
Densidad seca al aire (Peso y volúmen CH12%) (g/cm³)
0.95
Defectos por secado
Ease of Drying: Drying is fairly easy; some difficulties could occur when drying too fast. Drying Defects: No particular risks of drying defects, subject to normal drying conditions. Kiln Schedules: The kiln schedule has been tested.
PROPIEDADES QUÍMICAS DE LA MADERA
PROPIEDADES MECÁNICAS DE LA MADERA
Resistencia a flexión (Módulo de ruptura) CH12% (kgf/cm²)
1242
Resistencia a la compresión paralela a la fibra CH12% (kgf/cm²)
794
Resistencia a la compresión perpendicular a la fibra CH12% (kgf/cm²)
115
Dureza Janka (lados) CH12% (kgf)
1123
Dureza Janka (extremos) CH12% (kgf)
1147
TRABAJABILIDAD
Aserrado
Sawing of this species requires powerful equipment.
Corte de chapa rotativa
Not suitable for veneering.
Chapa tranchada
Not suitable for veneering.
Pérdida de filo_romado
Moderate blunting effect; stellited blades for sawing and carbide tools for machining are advised.
Maquinado general
It needs powerful tools for processing. Possible difficulties caused by interlocked grain are reported.
Cepillado
Moderately easy; tools must be cautiously sharpened.
Moldurado
Moderately easy; tools must be cautiously sharpened.
Taladrado
Moderately easy; tools must be cautiously sharpened.
Escopleado, caja y espiga
Moderately easy; tools must be cautiously sharpened.
Clavado
Pre-boring is necessary.
Encolado
Difficult to glue because of high density.
Lijado
Easy to perform; it gives good results.
Sacar lustre
Can be polished without surface preparation.
Facilidad para herramientas manuales
Working with hand tools is difficult.
Usos Reportados
USOS FINALES (RESUMEN)
EXTERIOR GENERAL, poles, stakes posts, crossties, HOUSING GENERAL, parquet, FURNITURE AND CABINETS, SPORTS, TOOLS, tool handles, agricultural tools, CONTAINERS, cooperage, truck bodies, truck flooring, NAVAL CONSTRUCTION, boats
EXTERIOR GENERAL
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Postes de transmisión
- 3 - Estudo dendrologico e determinacao das caracteristicas fisicas e mecanicas do genipapo (Genipa americana)
Postes cerca
- 5 - Propriedades fisicas e mecanicas da madeira e do contraplacado de Pinus elliottii
Durmientes
- 8 - Maderas latinoamericas. III, Podocarpus standleyi ,Podocarpus oleifolius, Drims granadensis, Magnolia poasana y Didymopanax pittieri
VIVIENDA GENERAL
- 10 - Silica in Timbers
Parquet
- 15 - Empire Timbers
MUEBLES Y GABINETES
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
IMPLEMENTOS DEPORTIVOS
- 38 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
HERRAMIENTAS
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Mangos herramientas
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
Mangos agrícolas
- 44 - Atlas of Peruvian Woods
CONTENEDORES
- 50 - Properties of imported tropical woods
Duelas toneles
- 51 - Recopilacion de propiedades mecanicas de maderas creciendo en Chile
Carrocería de camión
- 53 - Timbers of the New World
Pisos de vagones_contenedores
- 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
CONSTRUCCIÓN NAVAL
- 55 - Tropical Timber Atlas of Latin America
Botes
- 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
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