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Aluminum Shell Assembly
Aluminum Shell Assembly

NAMF specializes in precision CNC machining and dip brazing of complex aerospace components. This aluminum housing subassembly highlighted here is used on an F-15E Strike Eagle. The body of the chassis is constructed of 6061 and 2003 aluminum alloys with 0.008 fin stock. The base of the chassis was machined on our precision CNC milling center. After machining, hardware and Heli-Coil inserts were installed and the assembly was dip brazed according to AWS-C3.7 Class C specifications. The cleaned assembly was coated with MIL-DTL-5541 Type II Class 3 chem film coating and painted with polyurethane paint per MIL-PRF-85285.

All engraving was performed with CNC machining equipment and filled in by hand with specialized ink, according to customer specifications. Lettering and graphics were stenciled and silkscreened onto the painted surface. The overall dimensions of the chassis are 15.570 x 12.631 x 7.527 with true dimension tolerances of 0.003. Flatness tolerances were held to 0.01 with close work tolerances as tight as ±0.002. Dimensional inspection was performed with precision CMM equipment. This aluminum alloy housing subassembly is an ongoing project for NAMF. For more information about this precision aerospace fabrication project, see the table below, or contact us directly.

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Highlights of this Precision Aerospace Fabrication Project

Product Description This dip-brazed chassis is used on the F-15E Strike Eagle.
CNC Machining Dip Brazing & Capabilities Applied/Processes Primary:
CNC Machining
  • Hardware Insertion
  • Helicoil Inserts
  • Mechanical Assembly
Dip Brazing
  • Dip Braze Per AWS-C3.7 Grade C
Chem-Film Coating
  • Coat Per MIL-DTL-5541 Type II Class 3
  • Polyurethane Paint Per MIL-PRF-85285
  • Done with our CNC Machines then filled in by hand with a special ink pen
Overall Part Dimensions Length: 15.570"
Width: 12.631"
Height: 7.527"
Tightest Tolerances ±.0.002"
True Position of .003"
Flatness of .010
Material Used Aluminum 6061 and AL 3003
  • Thickness: 0.008 fin stock
Bushing: 17-4 Stainless Steel
Material Finish Polyurethane Paint
In process testing/inspection performed Dimensional inspection
CMM Inspection
Industry for Use Aerospace
Volume Ongoing program
Delivery/Turnaround Time 12 weeks
Delivery Location Central PA
Standards Met Customer supplied 3D CAD Model/2D CAD Prints
AWS Standards
Product Name Housing Assembly
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