Page 127 - ISCAR(HOLE_MAKING_CATALOG_65)

USER GUIDE

Machining Conditions

Machine Power and Feed Force Requirements Internal Coolant Pressure

Selecting Coolant Pressure and Flow Rate INDEXABLE DRILLS
Power required, in relation to drill diameter Coolant Flow Rate (liter/min)
24 60
22 flow
rate
20
18 45
Power Pe (kW) 14 8 30
16
12
10

4 6 15
2
0
16 20 24 28 30 34 38 42 46 50 54 58 62 66 70
Drill Diameter D (mm) 16 25 35 45 60
f=0.25 Drill Diameter D (mm)
f=0.18
f=0.1 Minimum Coolant Pressure (bar)
Required Machine Power 10
Material: SAE 4140 9
Cutting speed: 100 m/min
8 7-13 X D
For different cutting speeds, use factor as follows:
7
Machine Power
6 4.5 X D
Pe · C
P = η 5 3 X D

2 X D
Vc [m/min] 100 150 200 4
C 1.0 1.5 2.0 3
η=Machine efficiency
2
1
Feed force (thrust force) required,
in relation to drill diameter 16 25 35 45 55 65
Drill Diameter D (mm)
12 * For special drills more than 4xD, it is recommended to use high coolant pressure
11 15–70 bar
10
9 8
Power Pe (kW) 7 6 5 4

2 3
1
0
16 20 24 28 30 34 38 42 46 50 54 58 62 66 70
Drill Diameter D (mm)
f=0.25
f=0.18
f=0.1

Required Feed Force
Material: SAE 4140

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