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Opening Drill
Valve Body: Opening Drill® 
Code:
6512
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The Challenge
The customer manufactures valves for the oil well industry. The customer is machining a valve body made from 4340 alloy steel using a Toshiba Shibaura 15 HP boring mill running with flood coolant.

Tool used: Valenite boring bar
  • Hole diameter = 7.900″
  • Hole depth = 21.0″
  • 125 RPM
  • 259 SFM
  • 0.006 IPR
  • 0.75 IPM
  • Number of passes = 6
  • Cycle time = 7 hours 20 minutes
Unsatisfied with this production process, the customer needed to reduce the cycle time.
The Solution
Allied recommended the Opening Drill.

Tool used: Opening Drill holder (070821-12) and insert (item OP-05T308-H)
  • 125 RPM
  • 259 SFM
  • 0.0037 IPR
  • 0.46 IPM
  • Cycle time = 46 minutes
The Advantages
The Opening Drill succeessfully reduced cycle time and also lowered the cost of production.
  • Decreased cycle time by 89.5%
  • Cost savings (after only 10 holes) = $1,557.53