CNC Machined Parts for Aerospace

What aerospace buyers need from a machining supplier

Aerospace machined parts are usually bought against a controlled drawing, not a generic catalog dimension. The drawing identifies the material grade, critical features, surface finish, thread standard, measurement notes and documentation needed for the part to enter an assembly. Our engineering review starts with those requirements: we check the geometry, tolerance, material and finish before confirming whether the part fits our process route.

Send a STEP or IGES model together with a dimensioned PDF, or provide a DWG, DXF or PDF when a 2D drawing is the governing document. We return DFM feedback with the quote within 24 hours, including questions about tight features, deep pockets, thin walls, threads or finishing that may affect cost and lead time.

This page is for buyers who need custom aerospace components, prototypes or repeat production parts. It does not imply approval by any aerospace programme or third-party body. If your program requires a specific certificate, checking record, approved process or special packing instruction, include it in the RFQ so the requirement is reviewed before the order is accepted.

Aerospace parts we can review and machine

Typical parts include turned shafts, bushings, spacers, threaded components, milled brackets, housings, covers, flanges and fixtures. A part can combine turning and milling features, and our multi-axis capability can reduce the number of setups when several faces need machining. Swiss-type machining is available for small-diameter, high-volume turned parts where concentricity and repeatability matter.

Part fit is driven by the features that locate, seal or fasten the assembly. For example, a bearing seat or precision bore may need a tighter tolerance than an outside relief or non-critical edge. We apply the drawing requirement feature by feature rather than treating every dimension as a blanket precision claim. General dimensions follow ISO 2768-m unless the drawing provides another general tolerance block.

Materials, finishes and drawing information

Common material families include aluminium, stainless steel, carbon and alloy steel, brass, copper and titanium. Aluminium grades such as 2024, 5052, 6061 and 7075 are useful where low weight and machinability matter, with 7075 taking the higher-strength brackets and 2024 the fatigue-loaded fittings. Stainless grades 301, 303, 304, 316, 316L, 410, 416 and 17-4PH are available for different strength, corrosion and machining requirements, and 17-4PH is the grade usually called out where a part has to be both strong and corrosion-resistant. Steel, brass, copper and titanium are reviewed against the grade stated on the drawing; the full list is on our materials page.

Finishing can include anodizing, passivation, black oxide, plating, polishing, brushing and heat treatment through our vetted partner network. The finish, masking areas, roughness and dimensional effect should be stated clearly because a coating or treatment can affect threads, bores and mating surfaces. Link the requirement to the relevant face or feature instead of writing only “finish per standard.”

Documentation, quantities and lead time

Every order includes a material certificate (MTR) and pre-shipment photos of the actual parts. The packing list and carton markings are also prepared before dispatch. If your aerospace purchasing process needs additional documents, identify them with the drawing revision and part number so they can be considered in the quote.

Production orders start from 50 pieces per style and material, while prototype quantities are reviewed against the drawing. Samples typically ship in 5-10 days and production in 25-35 days after drawing approval; material availability, finishing and checking requirements can change the final date. Our milling envelope is up to 800 x 500 mm, and larger or unusual parts are reviewed individually.

For a quote, send the part number, drawing revision, quantity, material grade, finish and delivery target through the request a quote form. You can also compare our CNC machining capabilities, tolerances and quality documents before sending the file.

The parts in this sector are usually one or two families repeated: fasteners and small turned features on one side, and structural milled components on the other. The first family is covered under custom screws, the second under 5-axis machining, where features on several faces are cut in a single setup rather than re-fixtured.