BS 7747:1994

This standard BS 7747:1994 Forestry machinery. Portable brush cutters and grass trimmers. Cutting attachment guard strength is classified in these ICS categories:

• 65.060.80 Forestry equipment

This International Standard specifies a test method and the corresponding strength requirements for cutting attachment guards of portable hand-held combustion engine brush-cutters, for use primarily in forestry, and grass-trimmers, to test their safety in practical use. This ensures safety for the operator being protected from thrown objects and unintentional contacts with the cutting attachment.

Another aspect of safety when designing a cutting attachment guard is its dimensions: required dimensions are given in ISO 7918.

NOTE 1 The present edition is ISO 7918:1985 and covers only circular saw-blade guards to brush-saws, but it is anticipated that the new edition will cover cutting attachment guard dimensions for portable brush-cutters, brush-saws and grass-trimmers.

This International Standard does not apply to cutting attachment guards for lawn-trimmers, which are dealt with in ISO 10518[1].