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ADVICE ON DRILLING WORKPIECES
The following points should be observed at all times:
ć always use sharp tools
ć cool the drill bit with a suitable liquid
ć use a special drill bit for drilling into stainless steel
ć for very hard materials use a higher pressure at lower speed setting
ć for soft materials apply light pressure at a higher speed
ć Attention: too high a pressure overloads the motor and reduces the drilling speed
ć small drills require a high drill speed
ć larger drills require a lower drill speed
The following table gives further helpful advice:
ć the correct speed is different for each material
ć the cutting speed is dependent on the diameter of the drill and the rotation speed
ć the table gives the approximate rotation speed
ć please note that an average speed has been calculated for the listed materials and the rotation
speeds have been rounded
ć in some cases the calculated cutting speeds (CS) cannot be selected in practice - use the nearest
available value
Drill size
Material CS 234567891013
Wood, soft 300 rpm max. max. max. max. max. max. max. max. max. max.
Wood, medium 180 rpm max. max. max. max. max. max. max. max. max. max.
Aluminium "hard“ 120 rpm max. max. max. max. max. max. max. max. 3800 2950
Wood “hard”, copper 60 rpm max. max. max. 3800 3200 2700 2400 2100 1900 1500
Steel or sheet metal 35 rpm max. 3700 2800 2250 1850 1600 1400 1250 1100 850
Aluminium “soft” 30 rpm max. 3200 2400 1900 1600 1350 1200 1050 950 700
Structural steel 25 rpm 4000 2650 2000 1600 1300 1150 1000 900 800 600
Alloy steel 10 rpm 1600 1100 800 650 500 450 400 350 300 250
Stainless steel (VA steel) 10 rpm 1250 850 650 500 400 350 300 280 250 200
DECLARATION OF CONFORMITY
We, Kompernaß Handelsgesellschaft mbH, Burgstr. 21, D-44867 Bochum, Germany,
declare that this product complies with the following EU directives:
Machinery Directive (98/37 EC), Low Voltage Directive (73/23 EEC, 93/68 EEC), Electromagnetic
Compatibility (89/336 EEC, 93/68 EEC) in accordance with the applicable standards, and confirm
this with the CE mark.
Type/machine description: PARKSIDE BENCH DRILL PTBM 350-13
Bochum, 31.08.02
Hans Kompernaß
- Managing Director -
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