delimbing

Delimbing is the process of removing branches from a tree trunk or log. In forestry, delimbed logs are prepared for processing, transport, or milling. Delimbing usually follows felling and precedes bucking and debarking, though some operations incorporate delimbers on harvesters or skidders to strip limbs in the forest.

Manual delimbing involves workers using axes, saws, pruning knives, or handheld delimbing tools to cut limbs close to the trunk, moving along the length of the log. Care is taken to avoid damaging the bark or cambium. Mechanical delimbing uses specialized machines or attachments on harvesters, forwarders, or dedicated delimbing devices that strip limbs with hydraulic delimbing knives as the log is transported to a road or landing; this can accelerate throughput but may produce small bark fragments.

Safety and technique are central to delimbing operations. Key hazards include kickback, swinging limbs, and pinch points in machines. Personal protective equipment typically includes a hard hat, eye and face protection, hearing protection, gloves, and cut-resistant clothing. Safe procedures emphasize securing the log, maintaining a clear work area, and stopping movement before limb release, with tether lines used for unstable or leaning trees.

Applications and outcomes: Delimbed logs are easier to handle, stack, and process. Removing limbs reduces weight and wind resistance, lowers the risk of damage during transport, and streamlines debarking and bucking. Residual limbs can be used for biomass or small-dimension products; high-grade lumber relies on clean delimbed logs.

See also: Chainsaw, Skidding, Bucking, Debarking, Forestry equipment.