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O objetivo desta pesquisa foi identificar os niveis de vibracao ocorridos no processamento secundario da madeira e quantificar sua interacao com a diferenca de massa especifica aparente entre as especies de madeira. A pesquisa foi desenvolvida na marcenaria do Departamento de Ciencias Florestais e da Madeira, do Centro de Ciencias Agrarias da Universidade Federal do Espirito Santo, localizada no municipio de Jeronimo Monteiro, sul do Espirito Santo, no periodo de agosto a dezembro de 2010. As vibracoes transmitidas ao sistema mao-braco dos trabalhadores pelas maquinas foram coletadas por intermedio de um acelerometro e de um medidor de vibracao. As especies utilizadas na pesquisa foram Apuleia leiocarpa, Eucalyptus grandis versus E. urophylla (hibrido urograndis), Corymbia citriodora e Pterogyne nitens. Todas as maquinas apresentaram classificacao de conforto para o eixo XY (palma da mao e nos dos dedos) e classificacao de fadiga para o eixo Z (punhos). A serra fita foi a unica maquina que nao apresentou variacao da vibracao em relacao a especie processada. Conforme a classificacao de fadiga para o eixo Z, e necessaria a execucao de medidas para o controle da vibracao. Palavras-chave: Ergonomia florestal; ambiente de trabalho; densidade da madeira; marcenaria. Abstract Analysis of vibration in secondary wood processing with different apparent specific masses. The aim was to identify the levels of vibration that occurred in the secondary wood processing, and to quantify vibration interaction with the difference of apparent specific mass. The research was developed in wood workshops of Department of Forestry, Center for Agrarian Sciences, Federal University of Espirito Santo, located in Jeronimo Monteiro city, south of Espirito Santo, from August to December 2010. The vibrations transmitted to the hand-arm system of the workers by the machines had been collected by an accelerometer 20 model NK and a measurer of vibration model NK 300. The species used in the research had been Apuleia leiocarpa, Eucalyptus grandis versus E. urophylla (hybrid urograndis), citriodora Corymbia and Pterogyne nitens. All the machines had presented classification of comfort for axle XY and classification of fatigue for axle Z. As result, according to the classification of fatigue for axle Z, measures are necessary for the control of the vibration. Keywords: Forest ergonomics; work environment; density of the wood, joinery.

ANÁLISE DA VIBRAÇÃO NO PROCESSAMENTO SECUNDÁRIO DE MADEIRAS COM DIFERENTES MASSAS ESPECÍFICAS APARENTES