Page 51 - machining_titanium_05_2019

Drilling Shallow Holes

Drilling shallow holes is widely used in processing, for example in short pre-drilling or spotting
a hole, in order to achieve location accuracy and successful further drilling. Any drill of
relatively small diameter may be applied for this operation; however, there is no need for the
tool to have a significant cutting length. A better performance is achieved with the use of DRILLING TITANIUM
drills featuring stab cutting length that are intended specifically for producing short holes.

ISCAR provides various solutions for drilling shallow holes and spot drilling (Table 35) in the following
design configurations: replaceable MULTI-MASTER heads and solid carbide drills. In addition to
spot drilling, these simple tools are suitable for countersinking, milling chamfer and removing burrs.

Fig. 30 MM HCD head Fig. 31 MM ECD head

Table 35 Spot Drills

Point angle
Diameter*,
Family Designation Mm (in) 60° 80° 90° 120° Fig**
8
8.3
(0.375)
10
10.4
12
MM HCD 12.4 30
(0.500)
(0.625)
16
16.5
(0.750)
20
6
8
MM ECD 10 31
12
16
3
4
5
ECD-S2 32
6
8
10
* the nominal diameter of a drill.
** an illustrative example

Fig. 32 Solid carbide spot drill ECD-S

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