Bedienungsanleitung Bosch UniversalChain 40 (Seite 20 von 343) (Deutsch, Englisch, Holländisch, Dänisch, Französisch, Italienisch, Portugiesisch, Spanisch, Polnisch, Türkisch, Schwedisch, Norwegisch, Finnisch)

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20 | English

Beware when reaching the end of the cut. The weight of the

chain saw changes unexpectedly as it cuts free from the

wood. Danger of injury to the legs and feet.

Always remove the chain saw from a wood cut while the saw

chain is running.

Cutting Logs (see figures F–I)

When cutting logs, observe the following safety instructions:

Support logs so that the face sides at the cut do not close in

against each other, which would result in the chain being

jammed.

Position and set short logs safely before sawing.

Saw only wood or wooden objects. When sawing, always

take care to avoid hitting stones, nails, etc., as these could

be thrown up, could cause damage to the chain, or could res-

ult in serious injury to the operator or bystanders.

Keep a running chain saw clear of wire fencing or the ground.

Use of the saw to thin out branches or bushes is not ap-

proved.

Length cuts must be carried out with particular care, as

leverage with the gripping teeth (10) is not possible. Saw at

a flat angle to avoid kickback.

When working on a slope, operate above or to the side of the

trunk or laying tree.

Be careful not to trip over tree stumps, branches, roots, etc.

Cutting Wood under Tension (see figure I)

u Be extremely careful when sawing wood, branches or

trees under tension. Leave saw jobs like these to

trained professionals. There is a high risk of accidents.

When sawing logs supported on both ends, start the cut

from above (Y) about one third of the diameter into the log

and then finish the cut at the same spot from below (Z), in

order to avoid splitting of the log or jamming of the saw.

Avoid contact of the saw chain with the ground.

When sawing logs supported on only one end, start the cut

from below (Y) about one third of the diameter into the log

and then finish the cut at the same spot from above (Z), in

order to avoid splitting of the log or jamming of the saw.

Felling Trees (see figure J)

u Before using your chainsaw, always check local and

national laws, limitations and regulations for any pro-

hibited use cases.

u Always wear hard hat to protect head against falling

branches.

u The chain saw may only be used to fell trees smaller in

diameter than the length of the chain bar.

u Secure the work area. Ensure no persons or animals

are in the vicinity of the falling tree (



u Never attempt to free a jammed chain saw with the

motor running. Use wooden wedges to free a jammed

chain saw.

When cutting and felling operations are being performed by

two or more persons at the same time, the felling operations

should be separated from the cutting operations by a dis-

tance of at least twice the height of the tree being felled.

Trees should not be felled in a manner that would endanger

any person, strike any utility line or cause any property dam-

age. If the tree does make contact with a utility line, the com-

pany should be notified immediately.

The chain saw operator should keep on the uphill side of the

terrain as the tree is likely to roll or slide downhill after it is

felled.

An escape path () should be planned and cleared as neces-

sary before cuts are started. The escape path should extend

back and diagonally to the rear of the expected line of fall.

Before felling is started, consider the natural lean of the tree,

the location of larger branches and the wind direction to

judge which way the tree will fall.

Remove dirt, stones, loose bark, nails, staples, and wire

from the tree.

Notching undercut: Make the notch (X–W) 1/3 the dia-

meter of the tree, perpendicular to the direction of fall. Make

the lower horizontal notching cut first. This will help to avoid

pinching either the saw chain or the guide bar when the

second notch is being made.

Felling back-cut: Make the felling back-cut (Y) at least

50mm higher than the horizontal notching cut. Carry out the

felling back-cut parallel to the horizontal notching cut. Make

the felling back-cut so that enough wood is left to act as a

hinge. The hinge-wood keeps the tree from twisting and fall-

ing in the wrong direction. Do not cut through the hinge.

As the felling gets close to the hinge, the tree should begin to

fall. If there is any chance that the tree may not fall in the de-

sired direction or may rock back and bind the saw chain,

stop cutting before the felling back-cut is complete and use

wedges of wood, plastic or aluminium to open the cut and

drop the tree along the desired line of fall.

When the tree begins to fall, remove the chain saw from the

cut, stop the motor, put the chain saw down, then use the re-

treat path planned. Be alert for overhead limbs falling and

watch your footing.

Drive a wedge (Z) into the horizontal cut to make the tree

fall.

When the tree begins to fall, leave the danger area via the re-

treat path planned. Be alert for overhead limbs falling and

watch your footing.

Limbing a Tree (see figure K)

Limbing is removing the branches from a fallen tree. When

limbing, leave larger lower limbs to support the log off the

ground. Remove the small limbs in one cut as illustrated in

the figure. Branches under tension should be cut from the

bottom up to avoid binding the chain saw.

Bucking a Log (see figures L–O)

Bucking is cutting a log into lengths. It is important to make

sure your footing is firm and your weight is evenly distrib-

uted on both feet. When possible, the log should be raised

and supported by the use of limbs, logs or chocks. Follow

the simple directions for easy cutting.

F 016 L81 829 | (28.11.2019) Bosch Power Tools

Bosch UniversalChain 40 Seite 20

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