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|Standard:||ISO 6533:2012(E) Clause 5|
jointed test finger,
ul finger probe
ISO 6533 Gauge A B C for Testing Forestry machinery Portable chain-saw front handguard
The dimensions of the front hand-guard and the clearances shall be in relation to the intended position
of the left hand on the front handle during vertical cutting (bucking), determined using defined gauges
(see Clause 5).
Unless otherwise specified, the following is applicable when determining the dimensions and clearances.
a) The chain-saw shall be kept in the upright position; and the total forces applied to the guards (force
on gauge plus gauge gravity force in probing direction) shall be 10 N −10 N.
b) If the front hand-guard also activates the chain brake, the measurements shall be made
1) with the front hand guard in the position for non-activated chain brake, and
2) with a force of 10 N −1
0 N applied at the top edge of the guard, at 45° in a forward and downward
direction relative to the guidebar centreline and 50 mm to the left of the reference point X0 (see
Clause 6), when viewed from the rear.
Rigid gauges of the t ypes and sizes specified i n Table 1 shall be u sed t o determine the dimensions
Table 1 — Gauge dimensions
Dimensions in millimetres
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