Custom CNC Machining Service

Custom CNC machining is a subtractive manufacturing service: your 3D model or 2D drawing is loaded into our CAM system, and the part is cut directly from solid metal on computer-controlled mills, lathes and 5-axis machining centers — no molds, no tooling, no minimum tooling investment.

A typical project runs through four core processes: milling (3/4/5-axis) for prismatic features and pockets; turning and mill-turn for round parts and threads; drilling and tapping for fastener holes; and in-house finishing — anodizing, plating, polishing, laser marking — before final dimensional inspection.

Because every part is machined from your CAD data, design changes cost nothing but programming time. That is why OEM engineering teams use CNC machining for prototypes, design-validation rounds, pilot batches and bridge production — then keep us running for annual programs where volumes stay in the hundreds to tens of thousands.

What this page's typical part looks like: precision housings, brackets, heat sinks, shafts, fittings, manifolds and camera/audio components from 1 mm to 2,000 mm — parts where a fit, seal or alignment tolerance decides whether the final product works.

Why buyers keep coming back to Rejin CNC:

• ±0.005mm standard tolerance (±0.005mm achievable) verified on CMM — parts assemble right the first time, no rework at your line.

• One supplier, full process chain — machining, laser cutting, bending, anodizing and assembly under one roof, so there is no quality gap between vendors and no finger-pointing when something is off.

• Certified for regulated industries — IATF 16949 for automotive, ISO 13485 for medical, ISO 9001 overall; mill certificates and full dimensional reports ship with every order.

• Engineer-to-engineer communication — free DFM review within 24 hours, in English, from engineers who machine these parts every day.