ISO/TR 22521:2005

Foreword
Introduction
1 Scope
2 Normative references
3 Evaluation of vibration emission data
4 Chain saws
  4.1 Range of emission data measured according to
      ISO 7505:1986 - Chain saws with a displacement
      of D < 80 cm[3]
  4.2 Range of emission data measured according to
      ISO 7505:1986 - Chain saws with a displacement
      of D >= 80 cm[3]
  4.3 Range of emission data measured according to
      ISO 7505:1986 - Tree-service chain saws
  4.4 Range of emission data according to ANSI B
      175.1/CSA Z 62.1
  4.5 Range of emission data measured according to
      AS 2726.1 - Chain saws with a displacement of
      D < 80 cm[3]
  4.6 Range of emission data measured according to
      AS 2726.1 - Chain saws with a displacement of
      D >= 80 cm[3]
5 Brush-cutters and grass-trimmers - Range of emission
  data according to ISO 7916
Bibliography

ISO/TR 22521:2005 provides comparative data, obtained from various manufacturers and other official sources, for the year 2002, on the vibration emission values at the handles of portable hand-held forestry machinery. It is applicable to chain saws, brush-cutters and grass-trimmers in the full range of engine sizes. International Standards ISO 11681-1, ISO 11681-2 and ISO 11806 require that these machines be designed, based on the state of the art and existing vibration emission data, to generate vibration values as low as practicable, and ISO/TR 22521 is intended to assist in determining compliance with that requirement.