Parkside PTB-16 Instrucciones De Utilización Y De Seguridad página 39

the work piece and drill bit.
• You can also swing the drilling table to
the side, if you want to clamp a work
piece directly onto the baseplate.
• Swing the drilling table (7) out for
diagonal drillings or if the work piece
has an inclined bearing surface. For
this purpose, loosen the hexagonal
screw (16) on the swivel joint of the
drilling table.
• Swivel the drilling table (7) into the
required position.
• Tighten the hexagonal screw (16)
again with a fork wrench.
• Proceed in the reverse order to return
the drilling table to its original position.
Speed, cutting speed, feed rate
• The feed rate - the advance of the drill
- is carried out by hand with the 3-arm
feed handle (3). The cutting speed is
determined by the rotational speed
of the drilling spindle and by the bore
diameter. The correct selection of the
feed rate and rotational spindle speed
are decisive for the service life of the
drill.
The general rule is: The speed must
be reduced with increasing drill
diameter; the more stable the work
piece, the larger the cutting force.
The feed rate and cutting speed
must be reduced simultaneously, in
order to prevent the drill bit becoming
excessively warm.
• Additionally, cool the drill bit with
soluble cutting oil. Larger drilled holes
in thin sheet metal must be carried
out carefully with a low feed rate and
cutting force, so that the drill bit does
not get "caught" and the drilled hole
remains true to dimensions.
• Chip removal is difficult with deep
drilled holes (larger than 2 x drill bit
diameter) and the drill bit heats up
Use, references and tips
more.
• Reduce the feed rate and speed in
this case and provide for better chip
removal by repeated withdrawal of the
drill bit. Pre-drill drilled holes exceeding
8 mm diameter. This prevents
premature wear of the main drill cutting
edge and does not stress the drill bit
excessively.
Adjusting different spindle speeds
Fig. B + D
• You can adjust various spindle speeds
by moving the V-belt on the belt drive.
• To do this, turn the machine off and
pull the power plug. Proceed as follows
to move the V-belt:
• Risk of injury by unintentional start-
up!
Pull the power plug before opening the
V-belt housing (12)!
• Loosen the locking screws (2) on both
sides of the motor housing (1) and
push the motor toward the machine
head; this relieves the tension on the
V-belt.
• Move the V-belt according to the table
on the inside of the V-belt cover.
• Tension the V-belt again, by pressing
the motor plate (14) to the rear. Then
lock the motor (1) in position again with
the locking screws (2).
• Close the V-belt housing and plug the
power plug in. The machine is ready
for use again.
Keep the cover of the V-belt
housing closed during the
operating test. Risk of injury!
The tension is adjusted correctly, if the
V-belt can be pressed in by about 1 cm.
The V-belt pulleys must align horizontally,
in order to prevent premature wear and
GB/MT 37