5-Axis Machining, Fabrication and Inspection of Aft Tail Cone Assembly Jig

(Click on thumbnail to enlarge)5-Axis Machining, Fabrication and Inspection of Aft Tail Cone Assembly Jig

At West Cobb Engineering And Tool Inc., we have specialized in precision machining for the aerospace industry for over 30 years. A client needed an aft tail cone assembly jig for an aircraft assembly, and our company was a natural fit with our high level expertise and cutting edge equipment. We employed our SNK 250 CNC 5-Axis Machine, Calypso Dual-Head Waterjet, and our MIG welder to machine this assembly from steel tubing. Our Brown and Sharpe 10 40 10 Coordinate Measuring Machine (CMM) and Leica Laser Tracker were used to inspect the headers and set details. The assembly was surface ground for a smooth finish and epoxy painted. When completed, the tail cone assembly jig measured 131.7″ in length, 75.1″ in width, 32.9″ in depth, which was machined to precision tolerances of ± 0.005″. The part’s weight was estimated at 2500 lbs. – 3000 lbs., demonstrating our capability to handle very large components. The assembly jig met the standards of AS9100 REV D, ISO 9001:2015, and our customer’s exact specifications. The finished product was delivered to our client in Wichita, Kansas.

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Aft Tail Cone Assembly Jig Project Highlights

Product Name

Aft Tail Cone Assembly Jig

Product Description

Assembly Jig for the lower portion of the aft tail cone.

Capabilities Applied/Processes

CNC 5-Axis Machining
MIG Welding
Laser Tracker
CMM Inspecting

Surface Grinding

Equipment Used to Manufacture Part

SNK 250 CNC 5-Axis Machine, Brown and Sharpe 10 40 10 CMM, Leica Laser Tracker AT901-B, Calypso Dual-Head Waterjet

Overall Part Dimensions

Length: 131.7 in.
Width: 75.1 in.

Depth: 32.9 in.
Estimated Part Weight: 2500lbs – 3000lbs

Tightest Tolerances

± 0.005″

Material Used

Steel Tubing

Material Finish

Epoxy Painted

In process testing/inspection performed

CMM and Leica Laser Tracker to Inspect Headers and Set Details.

Industry for Use


Delivery Location

Wichita, KS

Standards Met

Customer Specifications, 2D CAD Drawing
AS9100 REV D
ISO 9001:2015