Page 178 - ISCAR(HOLE_MAKING_CATALOG_65)

USER GUIDE
SOLID CARBIDE DRILLS

Coolant Pressure and Volume Recommendations

Stability
The stability of the application volume is important in order
60
to obtain the very best tool life and hole accuracy. Check
Coolant Pressure [bar] 40 16 Coolant Volume [l/min] Unstable conditions can cause tool breakage.
the condition of the machine spindle, fixture and fixturing
20
50
of the component to secure maximum stability and rigidity.
12
30
Stationary Drill
Rotating Drill
20
8
Max 0.02 mm
10
0.0 4
3 5 10 15 20
Tool Diameter (mm)
Required Coolant Pressure Required Coolant Volume Max 0.02 mm
Optimum pressure Optimum volume
Good pressure Good volume Correct Direction Incorrect Direction
Minimum pressure Minimum pressure
Required coolant pressure and volume for SCD
drills with internal coolant spiral nozzles.

Force and Power Characteristics
Feed Force
(kN)

3.0 External Coolant External Coolant
2.5 Tool Life
2.0 Drills should not be used with flank wear
exceeding 0.2-0.3 mm.
1.5
1.0
0.2-0.3 mm
0.5
0.0
2 4 6 8 10 12 14 16 18
Drill Diameter (mm)
f=0.30 mm/rev
f=0.25 mm/rev
f=0.20 mm/rev

Net Power Consumption
(kW)

3.0
2.5
2.0
1.5
1.0
0.5
0.0
2 4 6 8 10 12 14 16 18
Drill Diameter (mm)
f=0.30 mm/rev
f=0.25 mm/rev
f=0.20 mm/rev
Material: SAE 4340
Speed: 100 m/min
Values may change for different materials and
drilling conditions.

176 ISCAR