Standard Values For Speeds With Hss - Eco - Twist Drilling - Optimum BF20 L Vario Operating Manual

Operation
4.8.2 Standard values for speeds with HSS – Eco – twist drilling
Steel, unalloyed,
up to 600 N/mm
Structural steel, alloyed,
quenched and subse-
quently drawn, up to 900N/
2
mm
Structural steel, alloyed,
quenched and subse-
quently drawn, up to 1200
2
N/mm
Stainless steels up to 900
2
N/mm
e.g. X5CrNi18 10
1): Speed [ n ] in r/min
2): Feed [ f ] in mm/r
3): Cooling: E = emulsion; Oil = cutting oil
• The above mentioned indications are standard values. In some cases it may be
advantageous to increase or decrease these values.
• When drilling, a cooling or lubricating agent should be used.
• For stainless materials (e.g. VA – or NIRO steel sheets) do not center since the material
would compact and the drill bit will become rapidly blunt.
• The workpieces need to be tensed in flexibly and stably (vice, screw clamp).
9 / 03 / 2010
65
Tool diameter
[ mm ]
form cutters
4
5
6
8
10
12
14
16
Material
1)
n 5600
2
2)
f 0.04
n 3150
f 0.032
n 2500
f" 0.032
n 2000
f 0.032
Version 3.1.4
49 - 122
Steel
15 - 24 m/min
1194 - 1911
955 - 1529
796 - 1274
597 - 955
478 - 764
398 - 637
341 - 546
299 - 478
Cutter diameter
2 3 4 5
3550 2800 2240 2000
0.063 0.08 0.10 0.125 0.125
2000 1600 1250 1000
0.05 0.063 0.08 0.10
1600 1250 1000 800
0.04 0.05 0.063 0.08
1250 1000 800 630
0.05 0.063 0.08 0.10
BF 20 Vario ; BF 20 L Vario
OPTIMUM
M A S C H I N E N - G E R M A N Y
49 - 108
Grey cast iron
Al alloy 150 -
10 - 20 m/min
-1
min
Speed [ ]
796 - 1592 11900 - 19000
637 - 1274
531 - 1062
398 - 796
318 - 637
265 - 531
227 - 455
199 - 398
6 7 8 9 10
1600 1400 1250 1120 E
0.16 0.16 0.20
900 800 710 630
0.10 0.125 0.125 0.16
710 630 560 500
0.10 0.10 0.125 0.125
500 500 400 400
0.10 0.125 0.125 0.16
Drilling-Milling machine
735 - 1715
Age-
hardened
250
m/min
9550 - 15900
7900 - 13200
5900 - 9900
4700 - 7900
3900 - 6600
3400 - 5600
2900 - 4900
Cooling
3)
E/Oil
Oil
Oil
Page 31