Genesee Manufacturing Company, Inc.
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Home : Case Histories : Aerospace

Aerospace
Workpiece examples include:

Landing gear assemblies, jet engine turbines, buckets, blades, fuel nozzles and various engine parts.

Case Histories

Spherical Ball Seat
A contract manufacturer of both commercial and military aerospace components is required to machine a family of parts from 4340 material at 33Rc hardness.
  • The form required is a spherical ball seat comprised of:
    • a .750 convex radius
    • Blended to a 15° taper
    • Then blended to a concave radius generally between .190 and .250
    • And finally facing at 90° to the component I.D.>
  • The parts have in common the .750 concave radius but vary in the length of the 15° chamfer, the size of the concave radius and the amount of the 90° facing required.
THE SOLUTION:
Genesee designed special hollow mills using four precision ground and matched premium T-15 HSS blades, set to cut to centerline to produce the entire ball seat complete in one pass.
  • This Genesee hollow mill solution has been in use for decades.
  • The technology has remained constant due to the productivity supplied, even during plant and location changes
Locking Stud Screws and Pins

A major American manufacturer produces a family of special locking stud screws and pins for the aerospace industry, both commercial and military. The parts require the turning of both a non-threaded stud portion and pre-thread diameter.

  • Part diameters range from 1/8" to 5/8".
  • Various chamfers are required between the diameters ranging from 20° to 45°.
  • The length of the hollow milling can be as long as 1" and depth of cut varies from .035" to .120"
  • The parts are manufactured from a number of different difficult-to-machine materials including Inconel 713, A-286 and 303 Stainless.
THE SOLUTION:

Genesee's patented standard GEN-DEX® tool using standard interchangeable GEN-DEX® insert holders was the answer.

  • Insert holders are positioned for turning the chamfer angles or for producing a square shoulder.
  • As required, the manufacturer is machining the entire family of parts using GEN-DEX®.
  • Precision ground GEN-DEX® "C" tolerance inserts, some in grade 111-50M and other is grade 117-50M are machining all part materials with excellent tool life.
  • Customer report that the GEN-DEX inserts last four times longer than their previous tooling.
  • High volume parts are produced within tolerances and without the taper or out of round problems they had experienced previously.
  • Supervisor report the tools are trouble-free and productivity on the parts has increased 10 times.

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Spherical Ball Seat