Clarke METALWORKER CDP401B, Operating & Maintenance Instructions

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Generally, smaller drill bits require greater speed than large drill bits. Softer
materials require greater speed than harder materials. See the following table
for approximate recommended speeds for the workpiece material.
l a i r e t a M s t i n U
) M P R ( e g n a R d e e p S
5 4 6 3
- 0 5 3 2
0 1 4 2
- 0 2 3 1
0 6 6 1
5 6 7 - 0 4 7 0 8 6 - 0 9 4 0 7 4 - 0 9 2 5 9 1
d o o W
n i 4 / 1 8 / 3 8 / 5 - - - - - - - - - - - -
m m 4 . 6 5 . 9 6 1 - - - - - - - - - - - -
& c n i Z
t s a c e i D
n i 6 1 / 3 4 / 1 8 / 3 2 / 1 8 / 5 - - - - - -
m m 8 . 4 4 . 6 5 . 9 5 . 2 1 6 1 - - - - - -
m u i n i m u l A
s s a r B &
n i 8 / 1 6 1 / 3 8 / 3 2 / 1 6 1 / 1 1 - - - - - -
m m 2 . 3 8 . 4 5 . 9 5 . 2 1 5 . 7 1 - - - - - -
s c i t s a l P
n i 8 / 1 6 1 / 3 6 1 / 5 6 1 / 7 2 / 1 8 / 5 - - -
m m 2 . 3 8 . 4 9 . 7 1 1 5 . 2 1 6 1 - - -
n o r I t s a C
e z n o r B &
n i 2 3 / 3 8 / 1 4 / 1 2 3 / 1 1 2 / 1 8 / 5 - - -
m m 4 . 2 2 . 3 4 . 6 5 7 . 8 5 . 2 1 6 1 - - -
li M l e e t S d
e ll a M & e l b a
n i 6 1 / 1 2 3 / 3 2 3 / 5 4 / 1 8 / 3 2 / 1 - - -
m m 6 . 1 4 . 2 4 4 . 6 5 . 9 5 . 2 1 - - -
l e e t S t s a C
n o b r a c d e M
n i 4 6 / 3 6 1 / 1 8 / 1 6 1 / 3 6 1 / 5 6 1 / 7 6 1 / 9
m m 2 . 1 6 . 1 2 . 3 8 . 4 9 . 7 1 1 5 . 4 1
& s s e l n i a t S
l e e t S l o o T
n i 2 3 / 1 4 6 / 3 6 1 / 1 8 / 1 4 / 1 8 / 3 2 / 1
m m 8 . 0 2 . 1 6 . 1 2 . 3 4 . 6 5 . 9 5 . 2 1
DRILLING SPEEDS
Important factors when determining the best drilling speed are:
• Material type
• Hole size
• Drill bit or cutter type
• Quality desired