BS EN 50144-2-13:2002 – Safety of hand-held electric motor operated tools — Part 2-13: Particular requirements for chain saws
1 Scope
This clause of Part 1 is applicable except as follows:
1.1 Addition:
This standard applies to chain saws but does not apply to chain saws operated by two persons and to pole cutters and pruners.
This standard does not give requirements for the design of the tool to reduce the risks arising from noise and vibration.
2 Definitions
This clause of Part 1 is applicable except as follows:
2.2.18 Replacement:
2.2.18
normal load
load obtained when the chain saw is operated continuously, the load being such that the input, in watts, is equal to rated input and will be measured using the rated voltage or on the upper limit of the rated voltage range
Additional definitions:
2.101
chain saw
electric tool which is intended for cutting wood by means of the saw chain supported by a guide bar
2.102
chain brake
device for stopping or locking the saw chain operated manually or automatically when kick-back occurs
2.103
drive sprocket
the toothed part that drives the saw chain
2.104
front handle
support handle located at or towards the front of the motor housing
2.105
guide bar
the part that supports and guides the saw chain
2.106
kickback
upward and/or backward motion of the guide bar that may occur when the nose of the saw chain,unexpectedly contacts an object
2.107
rear handle
the support handle located at or toward the rear of the chain saw
2.108
saw chain
loop of chain having cutting teeth that is driven by the motor and is supported by the guide bar
2.109
spiked bumper
part fixed to the casing, parallel to the guide-bar used as a pivot whilst sawing
2.110
usable cutting length
the distance measured along the guide bar axis from the root of the spiked bumper to the tip of the nose with the chain tension adjuster set at mid position. In the case of the chain saw fitted with a nose guard, measured from the root of the spiked bumper to the rear edge of the nose guard (see
Figure 1 01 )
2.111
chain catcher
device for restraining the saw chain if it breaks or derails
2.112
run down time
the elapsed time from the release of the main switch until the saw chain stops
3 General requirements
This clause of Part 1 is applicable.
4 General conditions for the tests
This clause of Part 1 is applicable except as follows:
4.2 Addition:
For the tests of Clauses 1 3 and 1 8 additional samples may be provided.
4.10 Addition:
For tests carried out at normal load, the chain and bar may be removed and the driving wheel of the
saw chain loaded by means of a brake.
5 Rating
This clause of Part 1 is applicable.
6 Classification
This clause of Part 1 is applicable except as follows:
Modification:
Class I tools are not allowed.
BS EN 50144-2-13-2002