Scientific name

Guibourtia spp

Other names

English: Bubinga

Geographic origin

Africa

Description

&;8226; Sapwood: Reddish white
&;8226; Heartwood: Reddish grey to red
&;8226; Fiber: Straight, slightly intertwined.
&;8226; Grain: Thin

Capacity of being impregnated

&;8226; Sapwood: Capable of being impregnated
&;8226; Heartwood: No capable of being impregnated

Mechanization

&;8226; Sawing process: High power is required, hardness is the sole difficulty.
&;8226; Drying process: Slow, high risk of crack formation.
&;8226; Planing process: Difficult due to hardness, although risk of repelling only appears on pieces of intertwined fibers.
&;8226; Gluing process: No difficulties.
&;8226; Nailing and screwing process: pre-drilling is required dut to its hardness.
&;8226; Finish: No difficulties

Physical properties

&;8226; Apparent density at 12% humidity
910 kg/m3 very heavy wood
&;8226; Dimensional stability
- Volumetric contraction coefficient
0.47 % nervous wood
- Relation between contractions 1.62% no tendency to deformity
&;8226; Hardness (Chaláis-Meudon) 8.4 very hard wood

Mechanical properties

&;8226; Resistance to static flexion 1,560 kg/cm2
&;8226; Elasticity module 171,000 kg/cm2
&;8226; Resistance to compression 720 kg/cm2