Custom Manufacturing
Custom CNC Machining Services for Metal and Plastic Parts
When a project moves from prototype to repeat production, changing assumptions about geometry, material, tolerance or inspection can create unstable cost and delivery. Our CNC machining review connects milling, turning and necessary secondary operations to the controlled RFQ before process and lead time are confirmed, helping the buyer reduce re-quotation and transfer risk.
Machining Processes Selected Around the Part
CNC Milling
For housings, plates, brackets, manifolds, fixtures and multi-face parts with pockets, holes and controlled surfaces.
CNC Turning
For shafts, pins, bushings, sleeves, fittings and rotational components with internal or external features.
Multi-Axis Machining
For angled features, compound contours and feature relationships that benefit from fewer setups.
Special and Secondary Processes
EDM, grinding, deburring, finishing, marking and assembly are coordinated when the approved routing requires them.
Project Stages We Support
| Stage | Buyer objective | Manufacturing focus |
|---|---|---|
| Prototype | Fit, function and design validation | Fast engineering feedback and revision control |
| Low volume | Pilot build or bridge production | Repeatable setup and defined inspection |
| Repeat production | Stable replenishment | Approved revision, retained process records and capacity planning |
Materials and Finishes
Common projects use aluminum, stainless steel, carbon and alloy steel, copper alloys and engineering plastics. Titanium, magnesium, nickel alloys and specialty polymers require material and process review. Finishing may include as-machined, anodizing, passivation, plating, coating, polishing, marking and heat treatment through verified in-house or partner capacity.
Tolerance and Surface Requirements
Provisional general tolerances are based on ISO 2768-m where no requirement is specified. Suitable features may be held to approximately ±0.05 mm, with qualified dimensions down to ±0.01 mm after review. Standard as-machined roughness is provisionally Ra 3.2 μm. These are screening values, not blanket guarantees.
What We Need for an Accurate Quote
- 3D CAD model and current 2D drawing
- Material and grade, or permission to recommend one
- Prototype and production quantities
- Critical tolerances, datums, threads and roughness
- Surface treatment and cosmetic zones
- Inspection reports and material documentation
- Delivery destination and required date
Quality Planned Before Production
Drawing review, material verification, first-piece checks, in-process inspection and final release are defined according to project risk. Full-dimensional, CMM, FAI, MTC and other documents must be requested before production so the correct evidence can be generated.
Standards and Regulatory Sources Used on This Page
For Custom CNC Machining Services for Metal and Plastic Parts, these primary sources define the scope of cited standards or regulations. They do not prove Formexi certification, a customer approval or project compliance; those require current, scope-matched records.
How We Reduce Sourcing and Manufacturing Risk for Custom CNC Machining Services for Metal and Plastic Parts
A useful supplier solution for Custom CNC Machining Services for Metal and Plastic Parts starts when machined plastics can change size with heat, moisture, residual stress, clamping force and measurement timing. Because metal-style tolerances applied without conditioning rules can create unstable inspection and assembly results, our project review reviews resin grade, filler, stock history, wall support, heat input, burr method and conditioning state before selecting the process and measurement plan. That approach helps the buyer avoid paying for the wrong process and lowers the chance of discovering a critical issue after machining or finishing.
For the Custom CNC Machining Services for Metal and Plastic Parts buying decision, our review needs the exact polymer grade, filler and color, moisture or temperature condition, functional fits, free-state requirement, quantity and cleanliness needs. We record assumptions, approval points and evidence requirements before the quotation becomes the production baseline.
Can Formexi Machine Your Part?
Send the model and drawing. We will confirm process, manufacturability, documentation, price and lead time from the actual requirements.