



Trendy CNC turning services for prototypes, low-volume runs, and production parts. Backed by advanced CNC turning centers and experienced machinists, we produce simple and complex turned geometries, including features that require live tooling or secondary milling. Whether you need a single prototype or a production batch, we deliver accurate CNC turned parts with fast lead times and consistent quality.
| Al | SS | CS | Br | Cu | Zn |
| Aluminum | Stainless Steel | Carbon Steel | Brass | Copper | Galvanized Steel |
| plate, round bar and billet | plate, round bar and billet | plate, round bar and billet | plate, round bar and billet | plate, round bar and billet | sheet and formed profiles |
| • Lightweight | • High strength | • Good strength | • Good machinability | • Excellent conductivity | • Basic corrosion protection |
| • Easy to machine | • Corrosion resistant | • Cost-effective | • Attractive appearance | • Good thermal performance | • Cost-efficient |
| • Good corrosion resistance | • Durable in harsh environments | • Easy to weld and fabricate | • Corrosion resistant | • Easy to form and process | • Good formability |
| Applications: | Applications: | Applications: | Applications: | Applications: | Applications: |
| Housings, panels, brackets, structural parts, automation components | Industrial parts, equipment, enclosures, brackets, outdoor products |
Frames, supports, machine parts, welded structures, industrial equipment | Fittings, connectors, decorative parts, hardware, precision components | Electrical parts, thermal components, connectors, industrial functional parts | Sheet metal parts, brackets, panels, enclosures, outdoor applications |
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The right surface finish can improve appearance, corrosion resistance, wear resistance and service life.
⚙
Anodizing
Improve appearance and basic protection for aluminum parts
🎨
Powder Coating
Provide good appearance and surface protection for metal parts
💨
Sandblasting
Improve surface texture and prepare for further finishing
📏
Brushing
Create linear texture for a refined and consistent look
✨
Polishing
Enhance smoothness and appearance for metal surfaces
💧
Electroplating
Improve appearance or function with a metallic coating
⬛
Black Oxide
Create a black surface
and provide basic protection
🛡️
Zinc Plating
Provide basic corrosion
protection for steel parts
🪙
Nickel Plating
Enhance appearance
and protection for metal parts
✅
Passivation
Improve surface condition
and corrosion resistance for stainless steel
🖌️
Painting
Add color and protection
for a wide range of applications
🔥
Heat Treatment
Improve material performance
based on usage requirements
Wide range of engineering plastics for different structural
| PEEK | PP | HDPE | HIPS | LDPE | PBT |
| High temperature resistance, high strength, chemical resistant | Chemical resistant, low density, easy processing |
High strength, chemical resistant, impact resistant | High impact, easy processing, cost-effective | Flexible, chemical resistant, good clarity |
Dimensional stability, chemical resistant, good electrical properties |
| PPA | PAI | PET | PPS | PS | PVC |
| High temperature, high strength, chemical resistant | Extreme strength, heat resistant, wear resistant | High strength, transparent, chemical resistant | Heat resistant, chemical resistant, flame retardant | High clarity, easy processing, cost-effective | Chemical resistant, flame retardant, cost-effective |
| PTFE (Teflon) | UPE | Bakelite | FR-4 | PEI |
| Ultra-low friction, chemical resistant, heat resistant | Extreme wear resistance, low friction, impact resistant | Heat resistant, electrical insulation, dimensional stability | Flame retardant, electrical insulation, high strength | orange /withe /black |
With strict adherence to industry tolerances, our CNC machining services ensures consistent accuracy for all CNC machined parts, allowing each component to integrate perfectly.
| Item | Specification | |
| Maximum Part Size | 3000 × 1800 × 850 mm | |
| Minimum Part Size | 2 × 2 × 2 mm | |
| Minimum Feature Size | ±0.2 mm | |
| Standard Tolerances | Metals: ISO 2768‑f | |
| Plastics: ISO 2768‑m | ||
| Linear Dimension | ±0.005 mm | |
| Hole Diameters | ±0.005 mm | |
| Shaft Diameters | ±0.005 mm | |
| Edge Condition | Sharp edges are broken and deburred by default | |
| Threads and Tapped Holes | Accommodate any standard thread size, custom threads available | |
| Lead Time | 3‑5 Business Days | |
Trendy Optimize your parts for cost-effective CNC manufacturing with our design guidelines. Our engineers provide design-for-manufacturability (DFM) feedback before production, helping you move smoothly from prototyping to production.
| Section | Guideline Item | Description | Notes / Tips | Image Placeholder (Editable) |
| Page Header | Main Title | CNC Machining Design Guidelines | Page hero title | |
| Guideline 1 | Radii | Sharp internal corners will naturally form radii |
Ensures smooth corner transitions for CNC parts. Recommended min internal radius ≥ 1/3 of cavity depth. |
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| Guideline 2 | Drill Depth | Maximum drill depth ≤ 12 × diameter | Beyond 12×D, drill deflection and chip evacuation become problematic. Use peck drilling for deep holes. | |
| Guideline 3 | Threads and Tapped Holes | Thread depth specifications: • Φ 1.5–5 mm: 3 × diameter • Φ ≥ 5 mm: 4–6 × diameter |
RapidDirect can produce threads of any specification. Recommend threaded hole depth ≤ 2× nominal diameter for blind holes. | |
| Guideline 4 | Undercuts | Available undercut profiles: • Square profiles • Full radius • Dovetail profiles |
Customizable for specific part geometries. Min undercut width ≥ 1 mm recommended for tool accessibility. | |
| Guideline 5 | Text / Engraving | CNC Milling: • Min stroke width: 0.5 mm • Max engraving depth: 0.1 mm CNC Turning: • Uses laser marking technology |
Standard text via CNC engraving or laser marking, customizable per requirements. Note: original spec ‘Max width 0.1mm’ corrected to ‘Max depth 0.1mm’ (likely typo). |
In the high-end manufacturing sector, strict dimensional accuracy is always paramount. Backed by professional turning technology, we produce high-precision rotational parts to meet the demanding specifications across consumer, industrial, medical and automotive industries.
Your success depends on reliable parts. Our CNC machining services provide precision machining with a 90% first-pass yield. You can get quality CNC machined parts for both prototypes and production runs.
Trendy is a trusted provider of CNC turning services, serving customers across a wide range of industries. Equipped with advanced CNC turning capabilities and a team of seasoned engineers, we deliver reliable solutions covering rapid prototyping all the way to high‑volume, production‑grade CNC‑turned components.
Multi‑axis & 5‑axis CNC capability for both simple turned parts and complex 3D milled components.
Full in‑house inspection ensures tight tolerance, smooth surface finish and stable consistency.
Free DFM review and technical consultation to reduce machining risks and improve manufacturability.
Quick quotation, streamlined workflow, urgent prototype support and stable mass‑production supply.
Smart process planning to reduce unnecessary cost while maintaining high quality.
Integrated machining + surface finishing (anodizing, sandblasting, plating, etc.) for assembly‑ready parts.




Send us your drawings, sample photos or application details. We’ll help you evaluate the best material based on structure, process, finish, environment and target cost.
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