Custom CNC Machining Service
First Mold offers custom CNC machining services worldwide, with 5-axis capabilities and tolerances as tight as ±0.005mm.. We work with metal, plastic, and composite materials, whether you need a single part or mass production.
- 98% on-time delivery
- 1-100,000+ pcs
- ±0.005mm precision
CNC Machining Capabilities & Solutions
First Mold offers a fairly wide range of CNC machining processes. The services we provide to customers generally fall into three categories.
CNC machining services are our most commonly used method for producing rapid prototypes. The delivery lead time typically ranges from 1 to 3 days. The tolerance range generally falls around ±0.1 mm.
Our low-volume CNC production currently ranks as our second most utilized service. The tolerance range can reach an even tighter precision of ±0.05 mm. We can guarantee strict dimensional consistency.
Using our precision CNC machining process, we can produce highly accurate cores, cavities, and inserts. As a result, our injection-molded parts consistently receive high praise from our customers.
Our CNC services primarily focus on CNC milling service and EDM machining. We also support these processes with custom CNC turning, CNC grinding, CNC boring, and other techniques. We can meet a wide range of complex customer requirements.
We offer options such as standard CNC machining and precision CNC machining. You do not necessarily need to pursue five-axis CNC machining. Instead, you should make the most suitable choice based on your specific processing needs and budget.
Our project managers will provide you with the most reasonable recommendation for each individual project.
Inndustries Served & Case Studies
As a leading CNC machining company, we deliver proven manufacturing solutions helping automotive, medical device, aerospace, and electronics manufacturers overcome production challenges. Our CNC machining services enable 30% cost reduction and 50% faster time-to-market through technical innovation.
We use CNC turning and turn-mill to make metal parts like motor shafts, medical pins, electronic connectors, and custom sleeves.
Specializing in custom housings, micro heat sinks, and screw‑less snap‑fits, we use optimized toolpaths and finishing to reach Ra < 0.4 μm.
We produce micro gears and mold inserts with ±0.005 mm precision, including hardened steel (>HRC 60) and wear‑resistant alloys.
Our CNC Machining Cases
Our CNC Machining Material Library
Based on a database of 10,000+ manufacturing cases, we have developed a three-dimensional decision model for material selection (mechanical performance, machining feasibility, lifecycle cost). We provide technical-grade material selection support for all industries.
Popular Materials for CNC Machining
| Material | Applications | Cost Level | Material | Applications | Cost Level |
|---|---|---|---|---|---|
| Aluminum 6061 | Aerospace brackets | Medium | Brass C360 | Electrical connectors | Medium |
| Aluminum 7075 | High‑stress fixtures | High | Copper 110 | Heat sinks | High |
| Aluminum 5052 | Marine hardware | Medium | Inconel 718 | Turbine disks | Ultra‑High |
| Stainless Steel 304 | Medical instruments | Very High | Nickel 200 | Electrolysis equipment | Ultra‑High |
| Mild Steel 1018 | Structural parts | Low | Magnesium AZ31B | Camera bodies | Very High |
| Tool Steel D2 | Cutting dies | Very High | Carbon Steel 1045 | Gears, shafts | Medium |
| Tool Steel D1 | Tooling fixtures | Very High | ABS | Automotive prototypes | Low |
| Titanium Grade 2 | Medical implants | Ultra‑High | Nylon (PA6/PA66) | Bearings, bushings | Medium |
| Titanium Grade 5 | Racing components | Ultra‑High | POM (Delrin) | Precision gears | Medium |
Premium Surface Finishes for Rapid Prototyping
Every component receives mandatory cleaning and deburring services to eliminate contaminants (oil, coolant residues) and achieve high-grade surface finishes (Ra≤3.2μm).
Mold Polishing
The surface of the CNC workpiece changes from raw metal color or tool marks to a uniform, non-reflective matte gray. It feels smoother to the touch.
Anodizing
A dense oxide film forms on the surface of the metal CNC part. The color can be customized. Hardness and corrosion resistance improve significantly.
Powder coating
The CNC part receives a thick, textured or glossy plastic-like layer. It feels warm to the touch and the colors appear vivid.
Electroplating
The surface of the CNC machined part becomes a metallic coating, such as bright nickel or chrome. It shows a highly reflective metallic luster and resists corrosion better.
High-gloss polishing
The final part surface reflects light like a mirror. All machining marks disappear completely.
EMI shielding coating
The workpiece surface receives a thin, electrically conductive layer. It provides electromagnetic shielding function. Its appearance looks similar to spray painting.
Craft Perfection with a Click
Our Precision Tolerances & Quality Control
Once we commit to a CNC tolerance, we will do whatever it takes to achieve it. We will arrange our quality inspection equipment, team, workflow, and task assignments in the most reasonable way possible. We do this to deliver on our high-quality promise.
CNC Machining Tolerances
| Material Category | Standard Tolerance | High-Precision Option |
|---|---|---|
| Metal Prototypes | ±0.05mm(±0.002″) | ±0.01mm(±0.0004″) |
| Plastic Prototypes | ±0.05mm (±0.002″) | ±0.01mm(±0.0004″) |
| Mold Machining | ±0.01mm(±0.0004″) | ±0.005mm(±0.0002″) |
Tips: Click to learn more about CNC machining tolerance standards.
Verified by Advanced Metrology
CMM Dimensional Inspection
First Article Inspection
Industry Standard Compliance
Advanced CNC Machining Facility
We are fully equipped with a full range of CNC machinery covering various industrial models. Besides, our available CNC machining processes are complete and well-rounded.
Why Choose Our CNC Machining Services?
Confirming material integrity and cosmetic standards. We analyze exact alloy compositions, verify surface roughness, and conduct accelerated corrosion testing.
Factory-Direct Scalability
One-stop from prototype to 100k+ units; no vendor switching; 98% on-time delivery; faster time-to-market.
Free DFM in one day
1-day free DFM feedback; catch 90% of design flaws; minimize rework; protect budget and timeline.
Data-Backed Precision
First-time fit guaranteed; tight tolerance ±0.005mm; full CMM inspection report; verifiable quality.
Ironclad IP Protection
NDA signed before file upload; 100% IP confidentiality; zero leaks or sharing; secure competitive edge.
4 Simple Steps to Your Custom CNC Parts
We use a convinient online ordering model to accelerate your project. Simply prepare your 3D CAD file, and our engineering team will guide you from initial design to final production.
Upload CAD & Receive DFM
Upload your 3D models (STEP, IGES) securely. Our team will review your files and do DFM checks to improve designs and reduce costs.
Detail Alignment & Quoting
We confirm materials, tolerances and surface finishes with you, then offer a reasonable quote. Production starts after your approval.
Production & Quality Control
We start to machine your CNC parts. Then we run strict quality control and CMM inspections to make sure your parts match your design exactly.
Global Shipping & Delivery
We manage secure international shipping, handle customs clearance, and provide all necessary compliance documentation.
We are trusted by many clients
FAQ for Custom CNC Machining Services
I am a beginner, what is CNC machining?
CNC machining is a subtractive manufacturing technology that uses computer programming to control machine tools for automated processing.
We highly recommend reading our “What is CNC Machining” article. It will give you a comprehensive understanding of CNC machining types, workflows, applications, and how it compares to other processes.
Do I need to provide 2D drawings along with my 3D CAD models for custom CNC machining services?
We highly prefer that you upload 3D CAD files in STEP (.stp) format for your custom CNC machining services. If you upload other types of 3D files, we will also require you to provide a 2D technical drawing to ensure manufacturing accuracy.
How quickly can I get a quote for fast CNC machining?
Can I update my design after receiving a CNC machining service quote?
Will your free DFM analysis reduce my CNC manufacturing costs?
Absolutely. We optimize the DFM to reduce scrap and simplify the machining operations. This proactive approach typically helps you reduce overall CNC manufacturing costs by 10% to 30%.
Is there a Minimum Order Quantity (MOQ) of CNC parts?
Do you offer volume discounts for small volume CNC machining services and production runs?
What is the maximum part size your custom CNC machining centers can accommodate?
For 3-axis and 4-axis machining, our maximum capacity is 1200 × 800 × 600 mm.
For 5-axis CNC machining, the envelope is 800 × 600 × 500 mm. Larger dimensions for machining services can be supported through our outsourced partners.
Can your CNC precision machining services handle micro-features below 0.5mm?
Yes. With our CNC precision machining services, we can machine micro-holes and fine features as small as 0.1mm by utilizing specialized micro-cutting tools (see common types of CNC tools) and adjusted machining strategies.
What Happens If My Requested Material Grade Is Temporarily Unavailable?
What Surface Roughness (Ra) Is Standard For CNC Machined Parts?
We will recommend alternative materials with similar performance characteristics (for example, using Aluminum 6061 instead of 7075). Alternatively, we can place an advance order for the specific grade, which may correspondingly extend the lead time for your CNC machining orders.
EN 
ES 
FR 
DE 
IT 
PT 
NL 
PL 
AR 
JA 
KO 
ZH