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Vertical I.D. Honing of a Steel Vertical Hinge for the Aerospace Industry

Steel Vertical Hinge
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Steel Vertical Hinge

An aerospace client required multiple I.D. holes on a hinge, made of 4340 steel with a Rockwell hardness of 39 - 43.  For this Level 2 Flight Safety part, we used our Sunnen honing machines & tooling to vertically hone three different-size holes.  The customer also required a material microfinish of 16 and 63, meeting tolerances of + .0005".

To learn more about this I.D. honing project, please see the details below.  For more information about our other services, please contact CT Hone, Inc.

Vertical I.D. Honing Steel Vertical Hinge Project Highlights

Product Name
Vertical I.D. Honing of a Vertical Hinge

Product Description
We had to hone multiple holes in this vertical hinge for the aerospace industry.
This component is a Level 2, Flight Safety part.
Capabilities Applied/Processes
Vertical I.D. Honing

Equipment Used to Hone Part
Sunnen Honing Machines & Tooling
Overall Part Dimensions
I.D. of Honed Holes:
  • .7184"
  • .9997"
  • 5.2497"
Tightest Tolerances
+ .0005"

Material of Component
4340 Steel, Rockwell Hardness 39 - 43
Maximum Material Finish
16 & 63 Microfinish

In Process Testing/Inspection Performed
  • Dimensional inspection with Sunnen gages
  • Surface finish inspection with Bendix profilometer
Industry for Use

Standards Met
  • Customer supplied operation sheet
  • 2D CAD drawing & specifications