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Thread Turning Inserts Technical Section
Recommended cutting speed (m/min) for thread turning inserts
ISO Material Condition
Standard HBA BLU BMA P25C MXC BXC K20 P30
<0.25%C Annealed
0.25%C Annealed
Non-Alloy Steel Quenched
and Cast Steel, <0.55%C & Tempered 110-210 120-180 100-180 100-180 70-150 50-130
Free Cutting Steel 0.55%C Annealed
P
Quenched
& Tempered
Low Alloy Steel and Cast Annealed
Steel (less than 5% alloying Quenched 90-140 80-130 70-120 70-120 60-90 50-80
elements) & Tempered
Annealed
High Alloy Steel, Cast Steel,
Quenched 70-90 60-80 50-60 55-70 50-60 40-50
and Tool Steel
& Tempered
Ferritic /
M Stainless Steel Martensitic
and Cast Steel Martensitic 110-160 90-130 60-90 60-90 50-80 50-80
Austenitic
Ferritic /
Cast Iron Nodular (GGG) Pearlitic 120-150 100-130 80-110 60-90
Pearlitic
K Grey Cast Iron (GG)
Ferritic
Pearlitic
140-150 120-130 90-100 65-85
Ferritic
Malleable Cast Iron 110-140 100-130 80-100 60-85
Pearlitic
Not
Aluminum-Wrought Alloy Cureable 700-1000 600-800 450-600 600-800 350-500
Cured
<=12% Si Not
Cureable
Aluminum-Cast,
Alloyed Cured 280-750 200-550 150-350 200-550 110-300
>12% Si High
N
Temperature
>1% Pb Free
Cutting
Copper Alloys Brass 190-350 150-250 110-180 150-250 90-150
Electrolytic
Copper
Duroplastics,
Fiber Plastics
Non Metallic 200-300 150-210 100-200 110-150
Hard
Rubber
Annealed
Fe based
Cured
High Temp. Alloys, Annealed 20-80 30-65 25-60
Super Alloys
S
Ni or Co Cured
based
Cast
Alpha
Titanium Alloys +Beta Alloys 30-60 40-50 35-45 35-45
Cured
Hardened
45-50 HRc
Hardened 30-60 40-50 35-45
H
Hardened Steel 51-55 HRc
Hardened
56-62 HRc
Chilled Cast Iron Cast 20-50 30-40 25-35
Cast Iron Hardened 20-40 20-30 15-25
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