Spiral drill STEEL dia. 7.9 mm HSS-G N DIN 338 118° universal
Angle118 °
Diameter7.9 mm
Flute length75 mm
Length, total117 mm
RPM from, grey cast iron, white cast iron403 RPM
RPM from, hard non-ferrous metals1008 RPM
RPM from, soft non-ferrous metals1209 RPM
RPM from, steels over 700 N/mm²806 RPM
RPM from, steels up to 700 N/mm²1008 RPM
RPM from, thermoplastics, fibre-reinforced plastics (GRP/CRP) 605 RPM
RPM to, grey cast iron, white cast iron1008 RPM
RPM to, hard non-ferrous metals2016 RPM
RPM to, soft non-ferrous metals2419 RPM
RPM to, steels over 700 N/mm²1008 RPM
RPM to, steels up to 700 N/mm²1411 RPM
RPM to, thermoplastics, fibre-reinforced plastics (GRP/CRP) 1613 RPM
Spiral angle, from25 °
Spiral angle, to30 °
VersionSTEEL


Drilling tools with cross grinding for industrial uses. Fully ground, right-hand turning versions that produce precise drill holes thanks to their high concentricity and exact centring. PFERD offers spiral drills in the STEEL (118 ° point angle) and INOX (135 ° point angle) versions.

High-performance drilling tools in the STEEL in HSSG (M2) version for industrial uses. Fully ground right-hand turning version with cross grinding that produces precise drill holes thanks to their high concentricity and exact centring.

Advantages
Very good chip removal.
High concentricity.
Exact centring and low feed force thanks to cross grinding.
Suitable for general use on steel, cast steel, grey cast iron, annealed cast iron, bronze, brass, aluminium.
Easy centring.
Long tool life.
Recommendations for use
Observe the recommended rotational speeds.
When drilling metals, use a high-quality cutting oil or cooling lubricant, if possible. This facilitates smooth running and extends the drill tool life. Exception: when working on aluminium, use kerosene instead of cutting oil.
When working on stainless steel (INOX) , remove any particles that break away from the workpiece in order to avoid corrosion. Clean the workpiece chemically or mechanically (etching/polishing, etc.) .
Safety notes
Wear eye protection!
Follow the safety instructions!
Materials that can be worked
Aluminium
Annealed cast iron
Black annealed cast iron (GTS, GJMB)
Brass
Bronze
Case-hardened steels
Casting scale
Casting scale with sand contamination and metal contamination
Cast iron
Cast steel
Chipboard
Copper
Ductile cast iron
Elastomers
Fibre-reinforced thermosetting plastics (GRP, CRP)
Fibre-reinforced thermosetting plastics (GRP, CRP) with a fibre content > 40 %
Fibre-reinforced thermosetting plastics (GRP, CRP) with a fibre content ≤ 40 %
Grey/nodular cast iron (GG/GJL, GGG/GJS)
Hard non-ferrous metal
Hardwood
Other
Other non-ferrous metals
Plastics
Roller-bearing and ball-bearing steels
Soft non-ferrous metal
Soft titanium alloys (tensile strength 500 N/mm²)
Soft wood
Steel
Steel, cast steel
Steels over 700 N/mm² (> 220 HB)
Steels up to 1, 200 N/mm² (< 38 HRC)
Steels up to 700 N/mm² (< 220 HB)
Thermoplastics
Thermosetting plastics
Titanium
Titanium alloys
Tool steels
White annealed cast iron (GTW, GJMW)
Wood
Zinc
Applications
Drilling
Drive types
Column drill
Power drill
Robot
Stationary machines
Tool machine