OEM Magnesium CNC Turned and Milled Parts Supplier
Overview
XCM CNC provides custom magnesium CNC turning and milling for AZ31B and AZ91D parts, with MOQ from 1 piece, standard lead time of 10-15 days, and quality systems aligned with ISO 9001 and IATF 16949.
Using equipment from brands such as Mazak and DMG, we review flame-safe machining for thin walls, thermal expansion effects after return to room temperature, and the right surface-protection route during DFM. That helps portable housings, brackets, and controller box projects move from sample approval to low-volume production with fewer revision loops.
Key Capabilities
Machining Parameters
- Materials: AZ31B, AZ91D, project grades by drawing review
- Tolerance: +/-0.003 mm (+/-0.00012 inch), IT5 or IT6 accuracy, +/-0.01 mm shaft and bore fits, with h6 and H7 available
- Surface Finish: Ra 3.2 um milled, Ra 1.6 um precision machined, Ra 0.8 um turned or bored
- GD&T: Coaxiality 0.012 mm, runout 0.01 mm, cylindricity 0.011 mm
- Max Size: Milling 3000 x 1600 x 1400 mm, turning diameter 1250 x 2000 mm
- Surface Treatment: Chromate conversion, micro-arc oxidation, e-coat, spray coating by drawing review
- Thread: M1.4-M220, NPT, BSP, G, PT
- Inspection: CMM report, FAI report, and material certificate by order requirement
Magnesium DFM Review for OEM Drawings
Magnesium OEM drawing review can lock +/-0.003 mm critical features and 0.015 mm position tolerance before sample approval. When a project changes between AZ31B and AZ91D, includes 0.5 mm thin walls, or needs 0.01 mm hole position control, we review stock allowance, fixture datums, and inspection points together before the first sample is cut.
Flame-Safe Sample Approval for Thin-Wall Parts
Magnesium sample approval can reserve Ra 1.6 um mating faces and Ra 0.8 um turned or bored functional surfaces on the same part. When the design includes thin walls close to 0.5 mm, H7 fits, or multi-face machining, the first article review also checks heat buildup, elastic recovery, and the deburring range before release.
Thermal Expansion Review for Critical Fits
Magnesium revision changes should trigger a recheck of 0.012 mm coaxiality and 0.01 mm runout on shaft-bore or flange interfaces. When a revision affects deep cavities, long slots, or fit-critical faces, we reassess toolpaths, stock allowance, and the reinspection sequence around 0.02 mm flatness and +/-0.003 mm precision features.
Reinspection After Surface Protection
Magnesium parts can keep Ra 3.2 um standard milled faces while reserving key areas for chromate conversion or micro-arc oxidation review. For ultra-lightweight housings and EMI shielding structures, the CMM can recheck 0.015 mm hole position and 0.012 mm coaxiality after protection, with FAI reports and material certificates issued by order requirement.
Specifications
| Product Name | OEM Magnesium CNC Turned and Milled Parts Supplier |
|---|---|
| Manufacturer | XCM CNC |
| Factory Location | Shenzhen, Guangdong, China |
| Quality System | ISO 9001, ISO 13485, IATF 16949, GJB9001C |
| Machining Process | CNC turning, CNC milling |
| Material | Magnesium |
| Material Grade | AZ31B, AZ91D, project grades by drawing review |
| Tolerance | +/-0.03 mm standard CNC machining tolerance |
| Precision Tolerance | +/-0.003 mm for selected critical features by drawing review |
| Surface Roughness | Ra 3.2 um milled, Ra 1.6 um precision, Ra 0.8 um turned or bored |
| Surface Treatment | Chromate conversion, micro-arc oxidation, e-coat, spray coating by drawing review |
| Max Part Size | Milling 3000 x 1600 x 1400 mm / Turning diameter 1250 x 2000 mm |
| Inspection | Hexagon CMM, WanHao VMS-3020G 2.5D video measurement, TRIMOS 600L height gauge, roughness tester, thread gauges |
| Application | Portable housings, camera gimbal brackets, lightweight controller boxes |
| Typical Application | Drawing-based magnesium housings and brackets |
| Key Features | Ultra-lightweight structure, EMI shielding, DFM review, sample approval |
| Critical QC Requirements | Flame-safe machining control, distortion review, room-temperature reinspection, coating review, moisture protection |
| Batch Range | 1 piece to low-volume repeat production |
| MOQ | 1 Piece |
| Typical Lead Time | 10-15 business days after drawing review |
| Drawing Formats | STEP, IGS, DWG, PDF, X_T |
| Secondary Process | Deburring, chromate conversion, micro-arc oxidation, e-coat, moisture-protection packaging |
| Material Certificate | Material certificate by order requirements |
| Material Feature | Ultra-lightweight structure, damping behavior, EMI shielding, flame-safe machining review |
| Assembly Features | Thin-wall housings, grounding faces, locating holes, low-inertia structures by drawing review |
Applications
Lightweight Consumer Electronics Housings and Shield Covers
Typical Parts: 5G base station heat-dissipation enclosure, RF shielding can, portable test equipment chassis
Magnesium is a better fit for portable housings, shielding covers, and test equipment enclosures when lightweight structure and EMI shielding matter. XCM CNC can machine 0.5 mm thin-wall housings and grounding faces, while chromate conversion or micro-arc oxidation is reviewed against the drawing before release.
Drone Gimbal Brackets and Quick-Release Structures
Typical Parts: Low-inertia bracket, quick-release frame, gimbal mount
Low inertia together with damping behavior makes magnesium suitable for drone and action-camera gimbal components. The ductility of AZ31B is useful for weight-reduction pockets and quick-release datums, while low-cutting-force parameters and staged roughing help control thin-wall distortion.
Robot Brackets and Portable Control Box Components
Typical Parts: Collaborative robot joint mount, vision-system precision mounting plate, AGV onboard control box enclosure
Ultra-lightweight magnesium can reduce the structural load on robot end-effectors, portable devices, and compact instruments while keeping assembly stiffness. Insert-hole position can be controlled to 0.015 mm, and thin-wall plates can be delivered with flame-safe machining control and moisture-protection packaging.
Optical Lens Brackets and Stabilizer Structural Parts
Typical Parts: Lens bracket, filter holder, stabilizer structure
Magnesium brackets help reduce inertia in lens and stabilizer assemblies and improve response to small vibrations. Concentric holes can be controlled to 0.012 mm coaxiality and mounting datums to 0.02 mm flatness for optical structures that need precise alignment.
Why Choose Us
Qualified Systems and Equipment Coverage
XCM CNC organizes magnesium projects under ISO 9001, ISO 13485, IATF 16949, and GJB9001C aligned quality systems, while using equipment from brands such as DMG, Mazak, Matsuura, and Brother to cover housings, brackets, and lightweight structural components. For AZ31B and AZ91D programs, we review flame-safe machining, thin-wall fixturing, and surface protection requirements during the drawing review stage.
Broad Size Range for Lightweight Magnesium Parts
We support magnesium machining from small connector-scale parts to larger structural components, including thin-wall housings, brackets, shielding covers, larger control boxes, and lightweight plates. Three-axis travel reaches 3000 x 1600 x 1400 mm and turning capacity reaches diameter 1250 x 2000 mm, while the final process plan still follows fixturing, flame-safe machining, and surface-protection needs.
Tiered Equipment Strategy for Cost and Quality
XCM CNC uses a tiered equipment mix across mainland China, Taiwan, Japan, and Europe or the US. Lower-tolerance magnesium operations can run on domestic or Taiwan equipment, while thin-wall precision areas move to imported machines such as DMG and Mazak. That keeps simple faces off high-hour machines while protecting critical tolerances and total part cost.
Flame-Safe Review and Sample Confirmation
Magnesium programs benefit from putting 2D and 3D drawings, thin-wall areas, and surface-protection zones into DFM before machining starts. During the sample stage, we confirm flame-safe process controls together with the critical dimensions so the process route is not reworked after the first build. NDA support is available for confidential projects.
Grade Selection Before Sample Approval
AZ31B and AZ91D can be compared before sample approval so the material grade, quotation, and post-treatment route stay aligned. That is more effective for ultra-lightweight and EMI shielding projects than treating magnesium like a standard aluminum job and adjusting the material choice later.
FAQ
What safety measures are used when machining magnesium parts?
Magnesium parts are planned around flame-safe machining, chip control, and the required surface-protection route instead of using the same process rhythm as standard aluminum jobs. The exact method, such as dry cutting or minimum-quantity lubrication, is selected from the grade, geometry, and project environment during review.
How do you protect machined magnesium parts from corrosion?
Common protection routes include chromate conversion, micro-arc oxidation, e-coat, and spray coating. The selected option is matched to the service environment, appearance target, and transport condition during DFM, then the related reinspection and packaging steps are arranged before delivery.
How do you choose AZ31B or AZ91D for a magnesium CNC part?
AZ31B offers better ductility and is often better for thin-wall parts that need forming or weight-reduction features. AZ91D provides higher strength and stronger corrosion resistance for thicker-section housings and brackets. The final grade is chosen from the part geometry, service environment, and finishing route during review.
When is magnesium a better lightweight option than aluminum?
Magnesium density is about two-thirds that of aluminum, so it is attractive when aggressive weight reduction, EMI shielding, and low-inertia response matter. The tradeoff is that flame-safe machining cost, protection steps, and the service environment all need to be evaluated before it is selected over aluminum.
What drawings and environment details do you need for custom magnesium parts?
Quotation and DFM usually need 2D and 3D drawings, the AZ31B or AZ91D grade, tolerance targets, quantity, and service-environment details. If the part includes thin walls, flame-safe machining concerns, or a defined protection route, those priorities should be marked before sampling starts.
How do you handle AZ31B or coating changes after magnesium sample approval?
If the grade or coating route changes after sample approval, we recheck thin-wall areas, grounding faces, and critical dimensions to see whether the inspection scope or sample status must be updated. When a material or coating change also changes the flame-safe process plan, an additional sample review is usually recommended before release.
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
