GRAPHITE 58G712 Traducción Del Manual Original página 13

WHEEL FOR SPINDLE ROTATIONAL SPEED CONTROL
Drill allows for operation with different spindle speeds. It can be controlled with the wheel (5) (fig. A). For each
setting of the wheel for speed control, the speed can be adjusted continuously by increasing or decreasing
pressure on the switch button (6).
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Increase the speed by turning the wheel (
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Reduce the speed by turning the wheel (
Choose appropriate rotational speed when the drill operates with no load, with pressed switch lock button.
Speed that is set in this way may decrease under load.
CHANGE OF GEAR
Drill is equipped with gear switch (9), which broadens the range of rotational speed (fig. C).
Gear I: lower range of rotational speeds – for large diameter holes or for works with hard material.
Gear II: higher range of rotational speeds – for small diameter holes or for works with soft material.
Set the gear switch (9) in appropriate position depending on the processed material. Turn the spindle
slightly if the switch cannot be moved.
Never change the switch position under operation of the drill. It may damage the power tool.
LEFT – RIGHT DIRECTION OF ROTATION
Choose direction of spindle rotation with the selector switch (4) (fig. A).
Right rotation – move the switch (4) to the extreme left position.
Left rotation – move the switch (4) to the extreme right position.
* The possibility is reserved that in certain cases position of the switch relating to rotation direction may be different than
specified. Please refer to graphic signs placed on the switch or tool body.
Do not change direction of rotation when the spindle of the drill is rotating. Check if the position of
the selector switch is correct before starting the tool.
OPERATION MODE SWITCH
Operation mode switch (2) allows for choosing suitable work mode: drilling with or without impact (fig. B).
Set the operation mode switch in the position for drilling without impact (drill symbol), when processing
materials like metal, wood, ceramics, plastics and alike. Set the operation mode switch in the position for
drilling with impact (hammer symbol), when processing materials like stone, concrete, brick and alike.
Holes in wood, wood-like materials and metals are made with drills of high speed steel or carbon steel (the
latter for wood and wood-like materials only). For stroke drilling special drills with sintered carbide inserts
should be used.
Do not use left direction of rotation when stroke function is on.
DRILLING HOLES
● When drilling a hole with large diameter, it is recommended to drill smaller hole and then ream it to
appropriate diameter. It prevents overloading the drill.
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When drilling deep holes drill gradually to smaller depths, then remove drill to remove chips and dust
from the hole.
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If a drill jam occurs during drilling, turn off the drill immediately to prevent its damage. Change direction
of rotation to remove the drill from the hole.
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Keep the drill in the axis of the hole. Keeping the drill perpendicular to the surface of the processed
material is highly desirable. Doing otherwise may cause drill jam or breaking in the hole and a user
injury in consequence.
Long lasting drilling at low rotational speed of the spindle may cause motor overheating. Provide
periodic breaks during operation or let the tool operate at maximum speed with no load for
approximately 3 minutes. Do not cover holes for motor ventilation in the tool body.
5) clockwise.
5) counter-clockwise.
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