Opening Drill
Opening Drill
Military Components: Opening Drill® 
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The Challenge

The customer manufactures components for the military industry. The contractor was tasked with drilling and boring large holes into 4150 steel (30 Rc) using a Mazak slant bed lathe with soluble coolant.

The customer needed a new solution that would increase the drilling speed of these large holes.

The solution of the T-A® GEN2 and the Opening Drill® successfully increased the speed of the hole making process. The solution also decreased cycle time for the customer.

Product: Opening Drill & T-A GEN2
Objective: Increase speed
Industry: Military/defense
Part: Military components
Material: 4150 steel
Hole Ø: 5.625" (142.875mm)
Hole Depth: 10.00" (254mm)

The Solution
The T-A GEN2 and the Opening Drill
  • Opening Drill Holder: OP4-1L-SS2.0
  • Indexable Inserts: OP-05T308-H
  • T-A GEN2 Insert: 457H-0400
Measure Competitor Drill T-A GEN2 Opening Drill
RPM 100 170 700
Feed Rate 0.005 IPR (0.127 mm/rev) 0.008 IPR (0.203 mm/rev) 0.004 IPR (0.102 mm/rev)
Penetration Rate 0.5 IPM (12.7 mm/min) 1.3 IPM (33.020 mm/min) 2.8 IPM (71.12 mm/min)
Cycle Time 1 hr 26 min 10 min 27 sec

The Advantages
The T-A GEN2 and the Opening Drill provided:
  • 88% cycle time decrease
  • Decreased costs
  • Increased speed