OPTIMUM
M A S C H I N E N - G E R M A N Y
Operation
Version 2.0.2 2014-11-04
Page 37
Original operating instructions
B17Pro | B23Pro | B26Pro | B33Pro
GB
4.4
Standard values for speeds with HSS – Eco – twist drilling
The above mentioned indications are standard values. In some cases it may be advanta-
geous 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 as the material would
compact and the drill bit will become rapidly blunt.
The workpieces need to be tensed inflexibly and stably (vice, screw clamp).
4.5
Switching on the machine
The drilling machine is switched on in the following order.
Turn the change-over switch into the neutral position (0).
Push the green push-button, and wait two seconds.
Turn the change-over switch into the desired direction of rotation. The rotation of spindle
starts.
4.6
Switching off the machine
Push the red push-button, or turn the change over switch into the neutral position (0).
4.7
Quick-action drill chuck
The bench drilling machine is equipped
with a RÖHM quick-action drill chuck.
In order to clamp a drill bit, hold the upper
part of the quick-action drill chuck and turn
the lower part.
Img.4-5:
Quick action - drill chuck
ATTENTION!
Make sure that the clamped tool is firmly and correctly fitted.
Material
Cutter diameter
Cooling
3)
2
3
4
5
6
7
8
9
10
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
Structural steel, alloyed,
quenched and subsequently
drawn, up to 900N/mm2
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
Structural steel, alloyed,
quenched and subsequently
drawn, up to 1200 N/mm2
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/
mm2
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 r/min
2): Feed [ f ] in mm/r
3): Cooling: E = Emulsion; oil = cutting oil
Drill sleeve
Drill drift
Upper part of quick-
action drill chuck
Lower part of quick-
action drill chuck
