North America (Juglans nigra) and very seldom in Europe (Juglans regia).
Branch forks of Walnut trunks.
Architectural woodwork, upright and grand piano production, gunstocks.
Lengths over 1 m very seldom, often open in the crotch.
The wood is easy to work with all hand and machine tools. Walnut is excellent to mold. The direction of growth must be observed to prevent fibre pick-up.
Drying has to be carried out with particular care where the Walnut Crotch is concerned so that no tension checking occurs in the crotchy part.
The very smooth wood takes all stains well particularly water and nitro stains. The wood polishes well when fillers are used.
Joints using screws, nails and glue are easy to produce and are of normal tensile strength. However, alkaline glues can cause reaction stains.