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Mill-Thread Technical Section
Carbide grade K20: Uncoated Sub-Micron carbide grade dedicated for machining Aluminum and Cast Iron. MT7: Sub-Micron carbide grade combines high hardness and toughness, with PVD triple coating for smooth cutting and high performance. MT Drill - MTD Cutting Data
Feed mm/r Cutting Diameter = D
Feed mm/tooth Cutting Diameter = D
Cutting Speed m/min
Material Group
Materials
Drilling 4<D<6
Mill Thread
K20 MT7
D≤4
D≥6
D≤4
4<D<6
D≥6
K
Cast Iron
50- 80 80-120 0.10-0.15 0.15-0.20 0.15-0.30 0.005-0.03 0.01-0.05 0.02-0.10
Aluminum ≤12%Si, Copper
100-250 100-350 0.06-0.10 0.10-0.20 0.20-0.30 0.005-0.04 0.01-0.06 0.02-0.13
N
Aluminum >12%Si
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80-180 0.05-0.07 0.10-0.15 0.15-0.25 0.005-0.04 0.01-0.06 0.02-0.13
Synthetics, Duroplastics, Thermoplastics
60-100 80-180 0.10-0.20 0.20-0.30 0.20-0.30 0.005-0.04 0.01-0.06 0.02-0.13
MT Drill working cycle
Start Position
End point
Right hand cutting
Moving up 1/3xP
Arc entrance 1/8xP
Thread Milling 1xP
Arc Exit 1/8xP
Drill & Chamfer
B12-20
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