TNPA T-Drill line now covers diameters from 12.5mm upwards T-Drill line now covers diameters

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Drill: TDR 4140-20T2-05Insert: SPMG 050204 DG TT9030
Material: SAE4140 (HB235-255)Speed (V): 160 & 200 [m/min]
Depth : 4xD (Blind hole, Wet)Machine: Machining center(15Kw)