Original T-A
Original T-A
I-Beams: Original T-A® 
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The Challenge
The customer needs to drill holes in I-beams made from A36 structural steel. They just purchased a new Peddinghaus PCD 1100 Beam Drill Line.

Tool used: Nachi cobalt twist drills (13/16")
  • Hole depth = 0.75"
  • 700 RPM
  • 0.007 IPR (0.178 mm/rev)
  • 4.9 IPM (124.46 mm/min)
  • Issue = Tool is breaking at various points on the flute length
The customer needed to reduce costs by decreasing the tool failure. Also, the machine operator was unhappy with the long stringy chips produced by the Nachi drills.
The Solution
Allied recommended the Original T-A Structural Steel drill.

Tool used: Original T-A structural steel insert (151A-0026-TW) with holder (24010H-003lS052)
  • 516 RPM
  • 0.009 IPR (0.228 mm/rev)
  • 4.65 IPM (118.11 mm/min)
  • No tool breakage
The Advantages
The Original T-A structural steel drill provided excellent chip formation (tightly curled 6’s and 9’s). More importantly, the drill eliminated the tool breakage issue.
  • Eliminated tool breakage
  • Provided excellent chip formation