GB/T 18961-2023 Portable brush-cutters and grass-trimmers - Vocabulary
1 Scope
This document defines terms relating to portable hand-held brush-cutters and grass-trimmers, their cutting attachments and power sources.
The brush-cutter position is shown in Annex A.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
3.1 Work functions
3.1.1
felling
separation of a standing tree from its root system
3.1.2
shredding
reduction of bushes, small trees and other growing organic materials to smaller pieces
3.1.3
trimming
cutting of weeds, grass and other similar soft vegetation
3.1.4
cutting means thrust
sudden and uncontrolled motion towards the operator’s side or rear that can occur when the rotating cutting means (3.3.1.1) comes in contact with a solid object
3.2 Machine types
3.2.1
brush-cutter
unit using a rotating cutting means (3.3.1.1) made of metal or plastics, intended to cut weed, scrub, brush-wood, and similar vegetation
3.2.2
brush saw
brush-cutter (3.2.1) fitted with a circular saw blade (3.3.1.2) intended to cut small trees and saplings
3.2.3
grass-trimmer
unit using flexible non-metallic line(s) string(s) or similar non-metallic flexible cutting elements, such as pivoting cutters, intended to cut weed, grass or similar soft vegetation
3.2.4
lawn-trimmer
electric powered grass-cutting machine with a non-metallic, non-rigid cutting attachment (3.3.1), of a cutting capacity (kinetic energy) of not more than 10 J, operating in a plane parallel to the ground
3.2.5
lawn edge-trimmer
powered grass-trimming machine where the cutting attachment (3.3.1) operates in a plane
approximately perpendicular to the ground
3.3 Cutting equipment
3.3.1
cutting attachment
cutting device such as a cutting means, saw blade or a flexible cutting means
3.3.1.1
cutting means
rotating device with cutting edges, designed to cut weed, brush, scrub and similar vegetation
3.3.1.2
saw blade
rotating circular metal blade with peripheral cutting teeth, designed to cut wood, such as small trees and saplings, by continuously removing material
3.3.1.3
flexible cutting means
non-metallic rotating cutting means (3.3.1.1) using flexible line(s), string(s) or pivoting cutting elements
3.4 Safety devices
3.4.1
cutting means retainer
saw blade retainer
retainer
mechanism which holds the cutting means (3.3.1.1) or saw blade (3.3.1.2) to the driving member
3.4.2
cutting attachment guard
device intended to protect the operator from unintentional contact with the cutting attachment (3.3.1) and from thrown objects
3.4.3
cutting means cover
transport cover
manually removable device covering the cutting edges of the cutting means (3.3.1.1) or saw blade (3.3.1.2) during transportation or storage
3.4.4
quick-release mechanism
device enabling the operator to free himself quickly from the unit in case of emergency
3.4.5
barrier
device attached to the unit, designed to maintain a minimum distance between the operator and the cutting attachment (3.3.1) when the unit is being operated
3.4.6
harness
adjustable equipment by which the unit is suspended from the operator
3.4.7
hip pad
flexible material attached to the unit or the harness (3.4.6), to cushion the operator from impact from the unit and to reduce the transmission of vibrations
3.4.8
suspension point
part of the machine to which the harness (3.4.6) can be attached
Note: See Annex A.
3.4.9
throttle trigger lockout
device that prevents operation of the throttle trigger (3.5.6) without intentional manual intervention
3.5 Control system
3.5.1
choke
device for enriching the fuel/air mixture in the carburettor to aid starting
3.5.2
stop switch
device which initiates the stopping of the power source
3.5.3
starter
device that rotates the engine crank shaft for starting
3.5.3.1
recoil starter
device for starting the engine by pulling a rewind rope which automatically rewinds when released
3.5.3.2
electric starter
device that rotates the engine crank shaft using external power, such as battery or mains, for starting
3.5.4
primer
device for supplying fuel to the pump of the carburettor to aid starting
3.5.5
throttle control latch
device to temporarily set the throttle in a partially open position to aid in starting
3.5.6
throttle trigger
device, activated by the operator's hand or finger, for controlling the engine speed and/or power
Note: Usually a lever.
