Use And Care Manual

Page 24
• Mark the desired depth of the hole on the side of
the workpiece (A).
• With the switch off, bring the drill bit (B) down until the tip
is even with the mark.
• Hold the feed handle at this position.
• Lock the depth scale tension knob. The chuck and the
drill bit will now be stopped at the distance selected on
the depth scale.
B
C
A
B
D
A
OPERATION
FIG. 24
WORKPIECE METHOD (Fig. 24)
• With the switch off, turn the feed handle (A) until the drill
bit tip (B) slightly touches the top of the workpiece (C).
• Hold the feed handles in that position.
• Loosen the depth tension knob (D).
• Spin the depth scale hub until the desired drilling depth
is at the scale pointer.
• Lock the depth tension knob. The chuck and drill bit will
now drill into the workpiece only to the distance selected
on the depth scale.
FIG. 25
DEPTH SCALE METHOD (Fig. 25)
Important factors when determining the best drilling speed:
• Type of material
• Size of the hole to be drilled
• Type of drill bit or cutter
• Desired quality of the cut
Remember, smaller drill bits require greater speed than larger drill bits. Softer materials require greater speed than harder
materials.
DRILLING SPEEDS
GENERAL DRILLING GUIDELINES