CUSTOM CNC PARTS / CNC MACHINING INSIGHTS
A machined enclosure is more than an outside profile. Its internal mounting features, connector openings, threaded bosses, lid interface and cosmetic surfaces all need to work together. A complete RFQ helps turn that collection of details into a reviewable manufacturing package.
Show the full enclosure system
Send the base, cover, gasket or sealing interface, mounting hardware, and a simple assembly reference when they affect fit. A single enclosure half may not reveal the need for a shared datum, an overlapping lip, a connector position, or a clearance condition. The assembly context helps the machining review focus on the interfaces that matter.
Identify functional surfaces
Mark the faces that seal, receive a cover, locate a connector, hold a board, or remain visible to the end user. These surfaces often need more explicit requirements than non-functional external walls. If a design uses an environmental enclosure rating, cite the applicable project requirement rather than assuming a generic outcome; NEMA publishes the official enclosure standard reference for its classifications.
| Enclosure feature | Useful RFQ information |
|---|---|
| Lid or cover interface | Shared datum, contact faces, fastener positions and any gasket or sealing requirement. |
| Internal mounting points | Board or component drawing, thread callouts, heights and clearance context. |
| Connector openings | Connector reference, orientation and positional relationship to the enclosure. |
| Cosmetic faces | Which surfaces are visible and how finish consistency should be evaluated. |
| Finish requirements | Anodizing, heat treatment or another process specified before machining starts. |
Use section views for internal features
Deep pockets, standoffs, thin walls, cable passages and lid steps are easier to review in section. A 3D model gives the overall geometry, but a controlled 2D PDF drawing should record dimensions, material, finish and critical notes. See our guide to CAD files to send with a CNC RFQ.
Thread and fastener notes should be complete
Enclosures frequently mix tapped holes, through holes, countersinks and threaded inserts. Give each feature a complete callout and include a hardware reference when the mating fastener controls the required depth or lead-in. Our CNC thread specification guide covers the drawing details that prevent thread assumptions.
Plan material and finish together
State the required material grade and finishing requirement in the released RFQ package. ExactMach has experience machining 6061 and 7075 aluminum grades and can coordinate anodizing or heat-treatment support where the drawing requires it. If finish affects threads, sealing faces or cosmetic surfaces, identify those concerns before the order is released.
Review the enclosure as an assembly
Before production, confirm that mounting, connectors, covers and hardware all reference the same revision. ExactMach coordinates drawing-defined CNC milling, CNC turning, prototypes and custom parts around Shenzhen and Dongguan for international orders, with inspection and finishing support discussed from the start.