Operation
Version 1.0.1 - 2020-08-1824 Translation of original instruction
DP33
EN
DP33_GB.fm
4.9.1 Speed table
~ 50Hz connection
4.10 Standard values for speeds with HSS – Eco – twist drills
The above data are standard values. In some cases it may be advantageous to increase or
decrease these values.
A cooling or lubricating agent should be used when drilling.
For stainless materials (e.g. VA – or NIRO steel sheets) do not centre, as this will result in
the material compacting and the drill bit rapidly becoming blunt.
The workpieces need to be tensed inflexibly and stably (vice, screw clamp).
Material
Drill diameter
Cooling
3)
2345678910
Steel, unalloyed,
up to 600 N/mm
2
n
1)
5600 3550 2800 2240 2000 1600 1400 1250 1120
E
f
2)
0.04 0.063 0.08 0.10 0.125 0.125 0.16 0.16 0.20
Mild steel, alloyed, tempered,
up to 900N/mm
2
n 3150 2000 1600 1250 1000 900 800 710 630
E/oil
f 0.032 0.05 0.063 0.08 0.10 0.10 0.125 0.125 0.16
Mild steel, alloyed, tempered,
up to 1200 N/mm
2
n 2500 1600 1250 1000 800 710 630 560 500
Oil
f" 0.032 0.04 0.05 0.063 0.08 0.10 0.10 0.125 0.125
Stainless steels up to 900 N/
mm
2
e.g. X5CrNi18 10
n 2000 1250 1000 800 630 500 500 400 400
Oil
f 0.032 0.05 0.063 0.08 0.10 0.10 0.125 0.125 0.16
1): Speed [n] in rpm
2): Feed [f] in mm/rev
3): Cooling: E = Emulsion; oil = cutting oil
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