CNC Machining of Aluminum Expansion Coupler for the Electrical Hardware Industry
Fairchild Auto-Mated Parts, Inc. CNC machines 2,500 to 5,000 expansion couplers annually for a client from the electrical hardware industry. Used within a rain-proof conduit connector, these couplers are made from 6061 aluminum, and measure 6.505" in length and 1.54" in outside diameter, with a 1.528" x 1.025" material extrusion.
Before manufacturing these couplers, Fairchild technical engineers design the connectors' dimensions to minimize machining and material costs. Once the client approves this design, we then begin producing these components on an ongoing basis.
Holding tolerances as close as ± .001", we use a combination of our 3-axis CNC lathe and CNC-retrofitted screw machine to manufacture each coupler. Customer part numbers and brand logos are also roll-engraved onto the exterior surface of the couplers, and we perform in-process testing and final inspections to ensure all units meet client expectations for quality. Once completed, the expansion couplers are shipped to various North American locations.

Aluminum Expansion Coupler Project Highlights
Product Description |
This aluminum expansion coupler is used within a rain proof conduit connector |
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Capabilities Applied/Processes |
Design
- Designed Connector Dimensions to Minimize Machining & Material Costs
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CNC Machining Roll Engraving | |
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Equipment Used to Manufacture Part |
3-Axis CNC Lathe |
CNC-Retrofitted Screw Machine | |
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Overall Part Dimensions |
Material: 1.528" x 1.025" Extrusion Length: 6.505" |
O.D.: Ø1.54" | |
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Tightest Tolerances |
±.001" |
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Materials Used |
6061 Aluminum |
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Max Material Finish |
32 Ra |
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Features |
Roll Engraved Customer Part Number and Brand Logo |
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Inspection Performed |
In Process & Final Inspection |
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Tooling Cost |
$595 |
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Estimated Part Weight |
7.24 oz. |
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Industry for Use |
Commercial Electrical Hardware Distribution |
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Packaging |
Individual Cells |
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Volume Manufactured |
2,500 to 5,000 Per Year |
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Turn Around Time |
8 Weeks |
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Delivery Location |
North America |
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Standards Met |
Customer supplied specifications |
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Product Name |
Expansion Coupler |

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