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Skip to content Custom parts for automotive development, testing, tooling, and equipment. TENGHUI provides in-house CNC milling and turning for prototypes and low-to-medium volume orders, supported by sheet metal fabrication and surface finishing.
Send your drawings for a review of materials, critical dimensions, manufacturing requirements, and delivery.
Work with a team that reviews your drawings, identifies manufacturing risks, and coordinates machining, finishing, and inspection.
Our ISO 9001:2015 quality management system supports production control and inspection against agreed drawing requirements.
CNC milling and turning for custom metal and plastic parts, from individual prototypes to repeat orders.
We review tolerances, tool access, wall thickness, threads, and finishing requirements before production. Manufacturing concerns are raised for your approval.
Material grade, supply condition, and required documentation are confirmed during quotation. Substitutions require approval.
Anodizing, plating, powder coating, and other suitable treatments are reviewed against the material and application.
Straightforward CNC prototypes can often be completed in 3–7 working days. Production and finishing schedules are confirmed after technical review.
We manufacture parts for fit checks, assembly trials, test equipment, and development builds. Repeat orders are reviewed against the approved drawings, quantities, and inspection requirements.
Typical projects include housings, mounting parts, adapters, and tooling made to customer drawings.
Key requirements we review include:
Parts with safety-critical functions or additional qualification requirements require a separate capability review.
In-house CNC machining, supported by sheet metal fabrication, rapid prototyping, and coordinated finishing.
Milled and turned metal and plastic components for prototypes, tooling, and repeat production.
Explore CNC Machining
Cut, bent, and assembled brackets, covers, panels, and enclosures. Weld details, hardware, and final dimensions are reviewed before production.
Explore Sheet Metal
CNC-machined and 3D-printed parts for appearance reviews, fit checks, and assembly evaluation. Material and process are selected according to the intended test.
Request Prototyping Quote
Finishes selected for appearance, corrosion exposure, wear, and assembly requirements. Coating thickness and masking are considered at critical features.
Explore FinishingMaterial selection follows the drawing and application. Grade, condition, availability, and documentation are confirmed before ordering.
| Material | Selection Notes | Typical Parts |
|---|---|---|
| Aluminum 6061 | A common choice for machined parts requiring a balance of weight, machinability, and finishing options. | Housings, brackets, mounting plates, and fixtures. |
| Aluminum 7075 | Considered where higher strength is required; corrosion protection and joining methods need review. | Loaded machined components and tooling. |
| Carbon & Alloy Steel | Grade and condition selected for strength, welding, wear, or heat treatment requirements. | Shafts, adapters, fixture bases, and fabricated brackets. |
| Stainless Steel 304 / 316L | Selected according to corrosion exposure, fabrication, and surface requirements. | Mounting hardware, housings, and equipment components. |
| POM / Acetal | Useful for selected sliding and locating components; temperature and creep require consideration. | Bushings, guides, rollers, and spacers. |
| Nylon / PA | Grade and moisture condition affect dimensions and mechanical performance. | Wear pads, rollers, guides, and prototypes. |
| ABS | A practical option for machined housings and assembly models. | Covers, enclosures, and development parts. |
| PC / PMMA | PC emphasizes toughness; PMMA emphasizes clear appearance. Finishing and chemical exposure require review. | Viewing components, covers, and visual prototypes. |
Material suitability must be assessed for the specific component. A material name alone does not establish automotive qualification.
Explore selected machined and fabricated parts that demonstrate our manufacturing capabilities.
For each example, we identify the material, manufacturing process, and relevant features. Automotive project examples are labeled where applicable.
TENGHUI holds ISO 9001:2015 certification.
If your project requires additional automotive qualifications, PPAP submissions, or customer-specific quality procedures, include these requirements with your inquiry so we can assess capability before accepting the order.
We support development parts, prototype housings, brackets, adapters, sensor mounts, and test or assembly tooling.
Production scope is confirmed after reviewing the drawing, quantity, function, and acceptance requirements.
Material documentation and traceability requirements are reviewed during quotation.
Please specify the required report type, material identification, and batch-tracking requirements before ordering. Availability depends on the selected material and procurement route.
Before repeat production, we confirm the approved drawing revision, material, finishing, inspection requirements, and quantity.
Where needed, dedicated workholding and first-part approval can be included in the production plan. Capacity and delivery are assessed for the specific component.
Selected CNC-machined features can achieve tolerances as tight as ±0.01 mm, subject to engineering review.
Achievable limits depend on feature size, geometry, material, heat treatment, and finishing. Threads, fits, and geometric tolerances should be specified individually.
Dimensional reports and CMM inspection can be discussed during quotation. Inspection coverage and methods are agreed for the order.
Options include anodizing, nickel or zinc plating, passivation, and powder coating where suitable for the material and application.
Specify the finish standard, thickness, color, masking areas, and corrosion or appearance requirements. Heat treatment and specialized processes are assessed separately.
Please provide:
For development projects, identify the intended test and whether production material is required.
Upload your 2D drawings (PDF/DWG/DXF) and 3D CAD files (STEP/IGES). We evaluate part geometry, materials, and tolerances within 24 hours.
Once we receive your design files, our senior manufacturing engineers will manually perform a comprehensive DFM review and deliver an accurate, optimized quote within 24 hours.
