Page 124 - HOLE MAKING CATALOG p001-148

INDEXABLE DRILLS USER GUIDE
ISO
Machining Data for DR Drills

Non-alloy steel and cast Material Condition Tensile Strength Hardness Group
steel, free cutting steel < 0.25 %C Annealed [N/mm2] HB No.(1)
≥ 0.25 %C Annealed 420 125
< 0.55 %C Quenched and tempered 650 190 1
Annealed 850 250 2
≥ 0.55 %C Quenched and tempered 750 220 3
Annealed 1000 300 4
P Low alloy and cast steel (less than 5% of alloying elements) 600 200 5
Quenched and tempered 930 275 6
1000 300 7
High alloyed steel, cast steel and tool steel Annealed 1200 350 8
Stainless steel and cast steel Quenched and tempered 680 200 9
1100 325 10
Ferritic/martensitic 680 200 11
Martensitic 820 240 12
600 180 13
M Stainless steel and cast steel Austenitic, duplex 180
400 260 14
Gray cast iron (GG) Ferritic / pearlitic 1050 160
Pearlitic / martensitic 250 15
130 16
K Nodular cast iron (GGG) Ferritic 230 17
Pearlitic 60 18
100 19
Malleable cast iron Ferritic 75 20
Pearlitic 90 21
130 22
Aluminum-wrought alloys Not hardenable 110 23
Hardenable 90 24
100 25
≤12% Si Not hardenable 26
200 27
Aluminum-cast alloys Hardenable 280 28
250 29
N >12% Si High temperature 350 30
>1% Pb Free cutting 320 31
32
Copper alloys Brass 55 HRC 33
60 HRC 34
Electrolytic copper 35
400 36
Non metallic Duroplastics, fiber plastics 55 HRC 37
Hard rubber 38
39
Fe based Annealed 40
Hardened 41

High temperature alloys Annealed

S Ni or Co based Hardened

Cast

Titanium alloys Pure
Alpha+beta alloys, hardened

Hardened steel Hardened
H Chilled cast iron Hardened

Cast

Cast iron Hardened

• This table refers to 2/3xD drill ratio usage. For 4xD ratio decrease cutting data by 15%
• Chipformer should be selected based on our geometry range recommendations
• When using external coolant supply only, reduce cutting speed by 10%
• Use internal coolant supply when machining austenitic stainless steel
(1) For workpiece materials list, see pages 495-524

122 ISCAR