Studies on the Chipping Characteristics of Chippers for Pruned Branches (II)

Hammer Type and Cylinder Type Chippers

Abstract

The chipping characteristics of a hammer type and a cylinder type chippers were continuously evaluated and compared with those of a fly wheel type chipper on preceding paper.
For a hammer type chipper, the mean power repuirements were reduced as the moisture contents of the tested branches were decreased. This tendency was opposite to a flywheel type chipper, since the chipping of flywheel type chipper depends on cutting action but that of hammer type chipper depends on impact.
A hammer type chipper is suitable for chipping a large quantity of pruned branches because of its large capacity and low power requirements. A cylinder type chipper is favorable to chip twigs for its very low power requirements when chipping rate is low, and a flywheel type chipper is desirable when small and uniform chips are needed.