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GEN2 T-A
GEN2 T-A
44W Structural Steel Plate: GEN2 T-A 
Code:
4006
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The Challenge
The customer is drilling solid steel plates made of 44W structural steel. They are using a Daewoo 4020 D 20HP Vertical Machining Center with 300 PSI through tool coolant.

Tool used:  Dormer HSS Twist Drill
  • Hole diameter = 13/16" (20.65mm)
  • Hole depth = 4" thick plate (101.6mm)
  • 525 RPM
  • 0.010 IPR (0.25 mm/rev)
  • 5.25 IPM (133.35 mm/min)
  • Cycle time = 1 min 12 sec
  • Tool life = 25 holes
The customer requested a tool that could break the chip, as they were getting ‘bird nests’ around the spindle every time.
The Solution
Allied recommended the GEN2 T-A Drilling System.

Tool used:  GEN2 T-A insert (item 450H-0022-HE) and holder (26005H-075F)
  • 1230 RPM
  • 0.007" IPR (0.18 mm/rev)
  • 8.8" IPM (223.52 mm/min)
  • Cycle time = 45 seconds
  • Tool life = 1,500 linear inches
The Advantages
The GEN2 T-A eliminated the poor chip formation while significantly reducing the cost-per-hole.
  • Reduced the cost-per-hole from $14.00 to $0.70
  • Total cost savings of 95%