Loading ...
Loading ...
Loading ...
– 13 –
9. SETTING THE BENCH DRILL
Note: Remove the plug from the socket before
carrying out adjustment, servicing or maintenance.
9.1 SPINDLE SPEED ADJUSTMENT –
FIGS. 7 – 8
This drilling machine is equipped with 5 drilling
speeds.
− Remove the pulley cover securing screw (4.1).
− Select the speed most suitable for the intended
application
†
.
− Drilling wood too slowly can cause splintering.
− Loosen the motor/belt tension adjuster (11)
releasing the tautness across the drive belt.
− Move the belt to the corresponding sections of
the motor and spindle pulleys ensuring the belt
remains horizontal.
− Apply pressure to the motor mounting plate
(9.1) to tension the drive belt. With the correct
tension achieved lock in position with the
motor/belt tension adjuster (11).
− Gently lower the pulley cover before tightening
pulley cover securing screw (4.1).
− Never attempt to operate the drilling machine
with the pulley cover open or not fully secured.
Caution: Over tensioning the drive belt will
accelerate belt wear, increase the loading on drive
bearings and the motor possibly leading to
premature failure. Under tensioning the drive belt
will lead to the drive belt slipping and increased
noise.
† As a general rule material with a softer composition
can be drilled faster as they cut more easily. Harder
materials require a slower speed as attempting to
make the hole at a high speed will result in the drill bit
over heating which may result in a poorly finished
hole, the bit annealing or the bit breaking.
7
8
FIG.
FIG.
(11)
(4.1)
(9.1)
Loading ...
Loading ...
Loading ...