CapabilitiesPrecision CNC Machining Services
For Aerospace Components
Custom Aerospace Engine
Component Concurrent
Engineering Services
Secondary Operations:
Specialty CMM Inspection &
Testing Capability
Example ProductsCNC Machining of 
Stainless Steel Seal Runners
for the Aerospace Industry
Fabrication & Assembly of
Turbine Exhaust Case Struts
CNC Machined
Titanium Shroud Sets
Custom CNC Machining of
Stator Assemblies
Custom Fabrication of Aluminum
Core Vane Assemblies
CNC Machining of
Titanium Sump Housing
CNC Milled Magnesium
Gearbox Housings & Cases

CNC Machining of Stainless Steel Seal Runners for the Aerospace Industry

A leader in manufacturing complex details and components for the aerospace industry, Birken Manufacturing recently CNC machined steel seal runners for aircraft engines. Using a Fadal Machining Center, we applied several processes including precision CNC turning, CNC milling, lapping, and OD grinding to fabricate the runners. We also performed deburring and dot peen marking. Outside services included heat treatment and a tungsten carbide plasma spray coating.  Made from AMS 6414 Steel, the seal runners have an outer diameter of 5.478" and a width of .657". We maintained a very tight tolerance of +.001"/.000", a circular runout of .0005", and cylindricity of .0003". Prior to delivering the final product to the client in Indiana, we conducted dimensional and magnetic particle inspections. To learn more about our services, please contact Birken Manufacturing or see below for details.

CNC Machining of Stainless Steel Seal Runners
CNC Machining of Stainless Steel Seal Runners

Request for Quote

Highlights of this Precision CNC Turning Project

Product Description

Seal runners are used within aircraft engines.

Precision CNC Machining Capabilities & Applied/Processes
Fixture Design and Manufacturing
CNC Turning
CNC Milling
  • Mill Slots
OD Grinding
  • Grind to Mirror Finish
Heat Treatment
Magnetic Particle Inspection
Plasma Spray Coating (Tungsten Carbide)
Dot Peen Marking
Equipment Used to Manufacture Part Fadal Machining Center
Overall Part Dimensions O.D.: Ø5.478"
Width: .657"
Tightest Tolerances
Circular Runout of .0005"
Perpendicularity of .001"
Flatness of .0005"
Parallelism of .0005"
Cylindricity of .0003"
Material Used AMS 6414 Steel
In process testing performed Dimensional Inspection
Magnetic Particle Inspection (MPI)
Industry for Use Aerospace
Delivery Location Indiana
Standards Met Customer supplied print, 2D CAD Drawing
Product Name Seal Runners

View Other Birken Manufacturing Featured Projects