Abstract A kolanut peeling machine was designed, constructed
and evaluated for the postharvest processing of the
seed. The peeling machine consists of a standing frame,
peeling unit and hopper. The peeling unit consists of a
special paddle, which mixes the kolanut, rubs them against
one another and against the wall of the barrel and also
conveys the kolanut to the outlet. The performance of the
kolanut peeling machine was evaluated for its peeling efficiency
at different moisture content (53.0, 57.6, 61.4 %
w.b.) and speeds of operation of the machine. The result of
the analysis of variance shows that the main factors and their
interaction had significant effects (p