Overview
XCM CNC provides OEM copper CNC turning and milling for build-to-print parts in grades such as C101, C102, and C110, with drawing review first focused on conductivity, thermal transfer, weldability, and heat-dissipation needs.
The factory runs under ISO 9001 and IATF 16949 systems and uses equipment such as DMG and Mazak machines. MOQ can start from 1 piece and standard lead time is commonly reviewed in the 10-15 day range. For conductive terminals, heat sink bases, copper base plates, electrodes, and RF structures, the sample stage confirms anti-oxidation treatment, plating, contact faces, and flatness before repeat production is released.
Key Capabilities
Machining Parameters and Tolerances
- Materials: C101 (oxygen-free copper), C102 (oxygen-free copper), C110 (electrolytic tough pitch copper)
- Tolerance: +/-0.003 mm (+/-0.00012 inch), IT5 or IT6 accuracy, +/-0.01 mm shaft/bore fits; h6/H7 available
- Surface Finish: Ra 3.2 um milled faces, Ra 1.6 um contact surfaces, Ra 0.8 um turned OD, Ra 0.4 um ground datum faces
- GD&T: Coaxiality 0.012 mm, runout 0.01 mm, flatness 0.02 mm, position 0.015 mm, cylindricity 0.011 mm
- Max Size: 3-axis milling travel 3000 x 1600 x 1400 mm; turning diameter 1250 x length 2000 mm
- Surface Treatment: Anti-oxidation protection, nickel plating, tin plating, passivation by order review
- Thread: Internal M1.4-M220, external M2.0-M220, depth 4xD; NPT / BSP / G / PT pipe threads
- Inspection: CMM report, FAI report, material certificate by order
Assembly Fit Tolerance for Terminals and Busbar Parts
Fit control on OEM copper terminals and busbar parts is usually concentrated on contact faces, mounting bores, and mating outer diameters. Bores can be reviewed to H7 around +/-0.006 mm, shaft fits to h6 around +/-0.005 mm, and contact-face flatness around 0.02 mm. For multi-hole terminals and busbar connectors, grouped-hole position can reach around 0.015 mm, with CMM reports used before assembly release.
Multi-Process Coverage for Turning, Milling, Drilling, and Tapping
Copper OEM parts often need turning, milling, drilling, and tapping on the same part. XCM CNC can complete turned outer diameters around Ra 0.8 um, contact faces around Ra 1.6 um, and threads from M1.4 upward within one route. Fewer setups reduce datum drift, which helps hold coaxiality around 0.012 mm on conductive terminals and electrode parts.
GD&T Control on Conductive Contact Surfaces and Datum Features
Geometric control directly affects contact condition and current transfer on conductive surfaces. Flatness can be held around 0.02 mm, parallelism around 0.03 mm over a 1030 mm datum length, and perpendicularity around 0.02 mm over 1000 mm. The sample stage defines the datum chain and inspection route first, then batch parts are rechecked against the same datums.
Inspection Reporting and Surface Protection Confirmation
OEM copper projects often need dimensional, GD&T, and surface-state reporting together. XCM CNC can provide CMM reports, FAI reports, and material certificates, with anti-oxidation treatment and plating routes confirmed before sample approval. Isolated export packing is then used to reduce surface change during transport.
Specifications
| Product Name | OEM Copper CNC Turned and Milled Parts |
|---|---|
| Manufacturer | XCM CNC |
| Factory Location | Shenzhen, Guangdong, China |
| Quality System | ISO 9001, ISO 13485, IATF 16949, GJB9001C |
| Machining Process | CNC turning, CNC milling, turn-mill machining, drilling, tapping |
| Material | Copper |
| Material Grade | C101, C102, C110 selected by conductivity, thermal transfer, and welding requirement |
| Tolerance | +/-0.03 mm standard CNC tolerance, critical dimensions by drawing review |
| Precision Tolerance | +/-0.003 mm for selected contact features after review |
| Surface Roughness | Ra 1.6 um contact surfaces, Ra 0.4 um ground faces by requirement |
| Surface Treatment | Anti-oxidation protection, plating, or protected packing by order review |
| Inspection | Dimensional inspection, FAI, CMM, and surface treatment report by order requirement |
| Application | Busbars, terminals, electrodes, heat sink bases, and waveguide conductive structures |
| Key Features | Large flat faces, contact surfaces, waveguide cavities, terminal holes, and protected packing |
| Critical QC Requirements | Flatness, roughness, contact-face recheck, anti-oxidation control, and packing confirmation |
| Batch Range | Prototype samples to repeat production by drawing review |
| MOQ | 1 Piece |
| Typical Lead Time | 10-15 business days after drawing review |
| Drawing Formats | STEP, IGS, DWG, PDF, X_T |
| Critical Tolerance Control | Contact faces and datum surfaces reviewed before surface protection |
Applications
Busbars, Power Terminals, and Electrodes for Power Distribution
Typical Parts: Busbar, power terminal, copper electrode
Pure-copper busbars and terminal parts depend on contact-face flatness, mounting-hole accuracy, and anti-oxidation protection. Build-to-print review can confirm whether C110 or oxygen-free copper is needed, then CNC machining can hold mounting-hole position around 0.015 mm and control contact-face flatness before the batch is released.
Heat Sink Bases, Thermal Plates, and Copper Heat Spreaders
Typical Parts: Heat sink base, copper base plate, heat spreader
Thermal copper plates focus on large-face flatness and contact-surface condition. CNC review can center on flatness around 0.02 mm, contact faces around Ra 1.6 um, and clamping-deformation control, with anti-oxidation treatment validated during the sample stage.
Electrode Caps, Contact Tips, and Welding Accessories
Typical Parts: Electrode cap, contact tip, electrode holder
Copper electrode caps and contact tips need strong electrical transfer and heat-handling contact faces. CNC machining can hold conical angle tolerance around +/-0.1 degree, thread features, and cooling bores while keeping grade and surface-treatment review tied to the order.
Waveguide Cavities and Conductive Structures for RF Equipment
Typical Parts: Waveguide cavity, high-frequency conductive block, connection flange
Waveguide and high-frequency copper structures need controlled cavity shape, contact-face roughness, and surface protection. CNC machining can review profile around 0.02 mm and key-face roughness around Ra 0.8 um, while anti-oxidation and cleanliness requirements are confirmed project by project.
Why Choose Us
Certified Systems and Equipment Coverage
The factory works under ISO 9001, ISO 13485, IATF 16949, and GJB9001C quality systems and uses DMG, Mazak, Matsuura, Brother, and other machines to cover pure copper, oxygen-free copper, and conductive structural parts. Drawing review can confirm contact faces, flatness, and anti-oxidation requirements in one flow.
Broad Size Coverage
The machining range covers both connector-scale parts and larger copper base plates or structures. Three-axis travel reaches 3000 x 1600 x 1400 mm and turning diameter reaches 1250 mm, while the final route still depends on fixturing, purity level, and surface-state requirements.
Tiered Equipment Strategy for Cost and Quality
XCM CNC uses a mix of mainland China, Taiwan, Japan, and Europe or US sourced CNC machines. Lower-tolerance copper operations can run on domestic or Taiwan equipment, while tighter contact faces and fit features can move to imported machines such as DMG or Mazak.
Contact Faces Approved on the Sample First
Copper conductive and thermal parts often fail on contact-face flatness and roughness before anything else, so the sample stage confirms datum choice and reinspection scope first. When a design changes, conductive faces, pressure faces, and assembly datums are reviewed before outer-profile changes.
Anti-Oxidation Protection Confirmed Before Release
Anti-oxidation treatment, isolated packaging, and plating can all be confirmed during sample approval to reduce rework caused by color change or contact-face degradation after shipping. If the project needs both conductivity and visual control, the protection plan is written into the order together with the inspection scope.
FAQ
How do you choose C101, C102, or C110 for a copper CNC part?
Selection usually starts from conductivity, thermal transfer, weldability, and whether oxygen-free copper is required. The final grade is then confirmed against the drawing, contact-face requirements, thermal-management target, and surface-protection needs.
Why is pure copper harder to machine than brass?
Pure copper is more likely to smear on the cutting edge, distort under clamping, and mark sensitive contact faces, so the process route is usually more conservative than brass. Extra stock and staged cutting are reviewed according to part size, flat faces, and hole requirements.
How do you protect machined copper parts from oxidation?
Anti-oxidation treatment, plating, or isolated packaging is defined first, then the matching reinspection is arranged. The exact route and conductive-face protection details are confirmed by order rather than using one default process.
What is the payment and shipping arrangement for copper OEM orders?
Payment can use T/T, PayPal, or Western Union. Shipping can use DHL, FedEx, UPS, or sea freight. Foam isolation plus carton or wooden-case packaging is reviewed during the sample stage together with the anti-oxidation plan.
What drawing files do you need for custom copper turned and milled parts?
Quotation and DFM review usually need STEP, IGES, STP, DWG, or a dimensioned PDF, plus material grade, tolerance, quantity, and application notes. If contact faces, flatness, or anti-oxidation requirements are critical, those sample priorities should be marked clearly on the drawing set.
Can you confirm contact-face and anti-oxidation requirements before copper sample approval?
Yes. Contact faces, flatness, anti-oxidation treatment, and packaging can all be included in the copper sample review. Roughness, flatness, and surface-treatment report scope are then confirmed item by item to the drawing requirement.
Request a CNC Machining Quote from XCM CNC
Send us your drawings. Our team will review the file and reply with a machining quote. MOQ: 1 piece, with competitive low-cost pricing.
Email: [email protected] | WhatsApp: +8618638951317
