OEM Polycarbonate (PC) CNC Turned and Milled Parts Supplier
Overview
XCM CNC provides custom Polycarbonate (PC) turning and milling for drawing-based transparent guards, safety viewing windows, and large panels. The factory is certified to ISO 9001 and ISO 13485 and uses DMG, Mazak, and other equipment. MOQ starts at one piece and standard lead time is 10-15 days. PC DFM review confirms grade selection, stress control, and protective packaging; sample review also checks flame-retardant direction, dimensional stability, and response to design changes before later batch routing is set.
Key Capabilities
- Materials: Clear PC, FR Polycarbonate, UV-stabilized PC, optical-grade PC by drawing review
- Tolerance: +/-0.03 mm standard, +/-0.005 mm selected critical features (by drawing review)
- Surface Finish: Ra 3.2 um milled, Ra 1.6 um precision milled or turned (selected features), Ra 2.5 um standard turned
- GD&T: Coaxiality 0.012 mm, runout 0.01 mm, cylindricity 0.011 mm (selected features, by drawing review)
- Max Size: Milling 3000 x 1600 x 1400 mm / Turning Dia. 1250 x 2000 mm
- Surface Treatment: Deburring, edge polishing, stress-relief annealing, protective film packing by drawing review
- Thread: M2-M220, NPT / BSP / G / PT
- Inspection: CMM report, FAI report, material certificate by order
Polycarbonate (PC) Impact-Resistant Guard DFM Review for OEM Assembly Drawings
PC OEM drawing review can confirm +/-0.005 mm precision mating features and 0.015 mm position requirements. When changing clear, FR, or UV-stabilized PC grades for large transparent guards, viewing windows, and impact panels, engineering records stock allowance, fixture datums, and inspection items in the sample-review file. Impact-resistant PC work normally also confirms annealing and solvent-contact risk.
Polycarbonate (PC) Transparent Window Sample Approval for Precision Mating Features
PC sample approval can validate Ra 1.6 um mating faces and +/-0.005 mm precision-hole tolerance in functional areas. For structures near 1.5 mm wall thickness, precision mating holes, or multi-face fixturing, the first article also checks heat-induced rebound and deburring coverage. Sample records include transparent-face appearance, edge quality, and assembly-interface dimensions.
PC Large-Part Revision Control for Critical Fits and GD&T
PC design revisions recheck 0.012 mm coaxiality and 0.01 mm runout for selected features by drawing review. Changes to deep cavities, long slots, or mating faces reassess toolpaths and reinspection order against 0.02 mm flatness and +/-0.005 mm precision features. Engineering controls revision numbers and inspection datums in the revision file.
PC Flame-Retardant and Large-Part Reinspection with Protective Packing
Finished PC parts can ship with Ra 3.2 um standard milled faces, while key transparent faces receive edge polishing and protective film. CMM and FAI reports recheck 0.015 mm position and selected 0.012 mm coaxial features on large guards, safety windows, and impact housings. Protective packing is confirmed before dispatch to reduce transport scratches.
Specifications
| Product Name | OEM Polycarbonate 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 | Polycarbonate (PC) |
| Material Grade | Clear PC, FR Polycarbonate, UV-stabilized PC, optical-grade PC by drawing review |
| Tolerance | +/-0.03 mm standard CNC machining tolerance |
| Precision Tolerance | +/-0.005 mm for selected critical features by drawing review |
| Surface Roughness | Ra 3.2 um milled, Ra 1.6 um precision milled or turned (selected features), Ra 2.5 um standard turned |
| Surface Treatment | Deburring, edge polishing, stress-relief annealing, protective film packing by drawing review |
| Max Part Size | Milling 3000 x 1600 x 1400 mm / Turning Dia. 1250 x 2000 mm |
| Inspection | CMM (Hexagon), 2.5D video measuring (WanHao VMS-3020G), height gauge (TRIMOS 600L), roughness tester, thread gauges |
| Application | Large safety windows, medical device covers, impact-resistant transparent panels |
| Typical Application | Drawing-based polycarbonate guards and panels for OEM assembly |
| Key Features | Impact-resistant PC machining, transparent-window DFM review, OEM sample approval, GD&T control |
| Critical QC Requirements | Material traceability, stress-cracking review, transparent-surface inspection, edge-protection check, post-process reinspection |
| 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, edge polishing, stress-relief annealing, protective packing and post-process reinspection |
| Material Certificate | Material certificate by order requirements |
| Material Feature | Impact-resistant transparent polymer, large-format protective window, stress-crack control by annealing |
| Assembly Features | Safety windows, machine guards, transparent panels and impact-resistant covers by drawing review |
Applications
Large Guards and Safety Viewing Windows
Typical parts: Safety Viewing Window, Protective Cover, Transparent Guard.
PC impact resistance and transparency suit safety viewing windows, protective covers, and transparent equipment guards. Milling travel of 3000 x 1600 x 1400 mm covers large panels. DFM review first confirms thickness uniformity, fixturing, and annealing conditions; after sample acceptance, edge treatment and protective-packaging standards follow the assembly drawing.
Large Transparent Medical Equipment Housings
Typical parts: Medical Device Housing, Transparent Inspection Window, Handheld Diagnostic Instrument Structural Bracket.
Impact-resistant transparent PC suits large medical equipment housings and viewing windows, subject to drawings, service conditions, and industry requirements. ISO 13485 quality controls can support FAI reports and material certificates, while precision mating features are inspected item by item against +/-0.005 mm and drawing GD&T requirements.
Large LED Covers and Transparent Lighting Covers
Typical parts: LED Lighting Cover, Clear Lamp Cover, Diffuser Cover.
PC light transmission, flame-retardant grades, and dimensional stability suit large LED covers and lamp covers. Curved areas can use Ra 1.6 um precision milling to control optical scattering, and mounting-hole position of 0.015 mm aligns with lamp structure. Flame-retardant and UV-stability requirements are confirmed with material grade at quotation.
Impact-Resistant Equipment Panels and Transparent Guards
Typical parts: 5G Base Station Protective Cover, Fiber Optic Terminal Box Panel, Industrial Camera Housing.
PC impact resistance and dimensional stability suit transparent equipment panels, guards, and impact-resistant housings. For multi-hole panels and assembly edges, OEM drawing review marks datums, mating tolerances, and cosmetic-face grades; design changes are reassessed through revision control and an updated inspection plan.
Why Choose Us
Complete Quality System and Equipment Coverage
The factory organizes quality processes around ISO 9001, ISO 13485, IATF 16949, and GJB9001C, using DMG, Mazak, Matsuura, Brother, and other equipment for polycarbonate transparent parts, impact-resistant windows, and large protective guards. Drawing review for PC transparent panels, flame-retardant parts, and medical-device housings can confirm stress control, polishing, and protective packaging together.
Broad Size Coverage
Machining covers needs from small connectors to large structural parts, including PC transparent windows, impact-resistant panels, small covers, larger guards, medical-device housings, and flame-retardant transparent parts. Three-axis travel reaches 3000 x 1600 x 1400 mm and turning diameter reaches 1250 mm; the production plan is confirmed for fixturing, stress-cracking risk, polishing, and transport protection.
Tiered Equipment Strategy for Low-Cost CNC Machining, Quality-Assured Production
XCM CNC uses CNC equipment from mainland China, Taiwan, Japan, and Europe or the United States. Lower-tolerance operations can run on domestic or Taiwan machines, while high-precision work uses imported equipment such as DMG and Mazak. Matching equipment to actual precision requirements reduces machining cost while meeting drawing requirements.
Sample Approval Linked to Production
The sample stage confirms transparent-face appearance, edge-polish grade, assembly-interface dimensions, and protective-film plans, reducing rework caused by later changes. First-article records for impact windows and transparent housings document cosmetic acceptance and functional-dimension results for later production. NDA signing is available for customer drawings.
PC Stress and Annealing Assessed Up Front
Drawing review assesses large-part fixturing, annealing timing, and solvent stress-cracking risk rather than applying metal-part machining rhythm directly to PC. Annealing conditions and cooling rate for flame-retardant parts and thick panels are determined before first-article approval to avoid batch cracking.
FAQ
How large can CNC machined Polycarbonate (PC) parts be?
Large PC parts are assessed against three-axis travel of 3000 x 1600 x 1400 mm and turning capacity of Dia. 1250 x 2000 mm. Final size depends on sheet size, fixturing, transparent-face protection, and stress-control requirements. Large parts normally also require annealing and transport-protection assessment.
How do you choose Polycarbonate or Acrylic for a transparent part?
PC is usually considered first for impact resistance, protection, and large transparent faces; Acrylic is often better for maximum light transmission and mirror-like display appearance. Final selection depends on drawing, service environment, budget, and finishing requirements, and quotation can compare both materials.
Why do Polycarbonate parts crack after machining or solvent contact?
PC cracking usually relates to residual stress, excessive clamping force, tool condition, or solvent contact. Stress-control method is confirmed from structure, annealing conditions, and service environment. DFM review identifies annealing timing and cleaning agents to avoid, reducing later cracking risk.
What is the MOQ and lead time for custom PC parts?
MOQ is one piece; samples take 3-7 days and standard batch lead time is 10-15 days, assessed from part complexity and quantity. Large or annealed PC parts receive a separate lead-time note at quotation. Payment can use T/T, PayPal, or Western Union; shipping supports DHL, FedEx, UPS, and sea freight.
What drawing files and PC details do you need for a custom quote?
Quotation and DFM review need 2D or 3D drawings in STEP, IGES, STP, DWG, or PDF, along with PC grade, tolerances, quantity, and application information. Mark cosmetic acceptance and sample-approval priorities for transparent faces, flame rating, guards, or polishing requirements.
How do you handle Polycarbonate design changes after sample approval?
Changes to transparent faces, assembly interfaces, flame-retardant requirements, or dimensions after sample approval first review stress control, machining allowance, and reinspection items. Whether a new first article or inspection datum is needed is confirmed feature by feature before later machining is scheduled.
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
