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USER GUIDE
DEEP DRILLING - BTA SYSTEM

Recommended Machining Conditions

Indexable Counterboring Heads ISC-EA, ISC-EC, ISC-IA, ISC-IC, IDC-EA / Trepanning Heads

Tensile Strength Material
ISO Material Condition [ksi] Hardness HB Group No. (1)
<0.25% C Annealed 61 125 1
≥0.25% C Annealed 94 190 2
Non-alloy steel and cast
steel, free cutting steel <0.55% C Quenched and tempered 123 250 3
Annealed 109 220 4
≥0.55% C
Quenched and tempered 145 300 5
Annealed 87 200 6
P Low alloy and cast steel (less than 135 275 7
5% of alloying elements) Quenched and tempered 145 300 8
174 350 9
Annealed 99 200 10
High alloyed steel, cast steel and tool steel
Quenched and tempered 160 325 11
Ferritic/martensitic 99 200 12
Stainless steel and cast steel
Martensitic 119 240 13
M Stainless steel and cast steel Austenitic, duplex 87 180 14
Ferritic/pearlitic 180 15
Gray cast iron (GG)
Pearlitic/martensitic 260 16
Ferritic 160 17
K Nodular cast iron (GGG)
Pearlitic 250 18
Ferritic 130 19
Malleable cast iron
Pearlitic 230 20
Not hardenable 60 21
Aluminum-wrought alloys
Hardenable 100 22
Not hardenable 75 23
≤12% Si
Aluminum-cast alloys Hardenable 90 24
>12% Si High temperature 130 25
N
>1% Pb Free cutting 110 26
Copper alloys Brass 90 27
Electrolytic copper 100 28
Duroplastics, fiber plastics 29
Non metallic
Hard rubber 30
Annealed 200 31
Fe based
Hardened 280 32
High temperature alloys Annealed 250 33
S Ni or Co based Hardened 350 34
Cast 320 35
Pure 58 36
Titanium alloys
Alpha+Beta alloys, hardened 152 37
Hardened 55 HRC 38
Hardened steel
Hardened 60 HRC 39
H
Chilled cast iron Cast 400 40
Cast iron Hardened 55 HRC 41
(1) Based on ISO 513 and VDI 3323 standards

330 ISCAR