|
Workpiece material
|
Drill material
|
Point angle
|
Cutting speed V m/min
|
Feed, mm/rev
|
Cooling
|
|
|
High-sulphur and high-phosphorus free-cutting steel, tensile strength up to 500 N/mm2
|
RN/GT-100
|
HSS
|
118°/140°
|
25
|
(0.01–0.02)d
|
Emulsion
|
|
Unalloyed ≤0.4% C carbon steel, tensile strength ≤800 N/mm2
|
RN/GT-100
|
HSS
|
118°/140°
|
25
|
(0.01–0.02)d
|
Emulsion
|
|
Unalloyed >0.4% C carbon steel tensile strength 800–1000 N/mm2; Alloyed low-carbon and improved steel, tensile strength ≤700N/mm2
|
RN/GT-100 |
HSS
|
118°/140°
|
20
|
(0.008–0.016)d
|
Emulsion
|
|
Unalloyed tool steel, tensile strength 800–1000 N/mm2; Alloyed low-carbon and improved steel, tensile strength 700–1000 N/mm2
|
RN/GT-100
|
HSS
|
118°/140°
|
16
|
(0.008–0.016)d
|
Emulsion
|
|
Alloyed tool steel, tensile strength 800–1000 N/mm2; Alloyed improved steel, tensile strength 1000–1200 N/mm2
|
RN/GT-100
|
HSSCo (HSS)
|
118°
|
12.5
|
(0.006–0.012)d
|
Emulsion
|
|
Alloyed improved steel, tensile strength > 1200 N/mm2
|
RN
|
HSSCo
|
130°
|
5–8
|
(0.005–0.01)d
|
Emulsion (Cutting oil)
|
|
Stainless martensitic Cr-Mo steels
|
RN
|
HSSCo
|
130°
|
10
|
(0.005–0.01)d
|
Emulsion (Cutting oil)
|
|
Stainless austenitic Cr-Ni steels, heat-proof steels
|
RN/Ti
|
HSSCo
|
130°
|
10
|
(0.005–0.01)d
|
Cutting oil
|
|
Manganese steels, > 10% Mn
|
RH
|
HSSCo
|
130°
|
3–5
|
(0.005–0.01)d
|
Dry
|
|
Spring steel
|
RN/Ti
|
HSSCo
|
130°
|
5–10
|
(0.005–0.01)d
|
Emulsion (Cutting oil)
|
|
Titanium and Ti-alloys
|
RN/Ti
|
HSSCo
|
130°
|
5–10
|
(0.005–0.01)d
|
Cutting oil
|
|
Grey cast iron, malleable cast iron
|
RN
|
HSS
|
118°
|
30
|
(0.012–0.025)d
|
Dry (Emulsion)
|
|
Chilled cast iron, up to 350HB
|
RN
|
HSSCo
|
118°/130°
|
30
|
(0.01–0.02)d
|
Dry (Emulsion)
|
|
Brittle brass
|
RN
|
HSS
|
118°
|
50–63
|
(0.015–0.03)d
|
Dry (Cutting oil)
|
|
Ductile brass
|
RN
|
HSS
|
118°
|
40
|
(0.012–0.025)d
|
Dry (Cutting oil)
|
|
Copper (metallurgical)
|
RW/GT-100
|
HSS
|
130°
|
32
|
(0.012–0.025)d
|
Emulsion (Cutting oil)
|
|
Electrolytic copper
|
RN
|
HSS
|
118°
|
20
|
(0.012–0.025)d
|
Emulsion (Cutting oil)
|
|
Cu-Ni-alloys
Cu-Zn-alloys |
RW/GT-100
|
HSS
|
130°
|
20–32
|
(0.008–0.016)d
|
Cutting oil (Emulsion)
|
|
Aluminium
|
RW/GT-100
|
HSS
|
130°
|
40–63
|
(0.012–0.025)d
|
Emulsion
|
|
Al-Mn-Cr-alloys
|
RW/GT-100
|
HSS
|
130°
|
40–63
|
(0.012–0.025)d
|
Emulsion
|