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Trusted by Customers Around the World
Precision CNC Parts & Custom Tooling Made in China
Tolerances down to ±0.01 mm | Lead times from 5 business days | Global delivery
Prototyping
Production
Rapid prototyping from drawings or 3D files
Wide range of materials and surface finishes
High-quality prototypes for testing and validation
Our Manufacturing Capabilities
CNC Milling, Turning & Finishing
Tolerances down to ±0.01 mm
Lead times from 5 business days
High-precision dies for complex metal parts
Long tool life and consistent performance
Laser cutting, bending, post-processing
- Tolerances down to ±0.1 mm (±.004 in)
- Lead times from 5 business days
mold inserts, core & cavity components, and tooling
Complex geometries and various part sizes
High-precision tooling for stable production
Precision Manufacturing Solutions
Material Overview
Aluminum
Versatile aluminum alloys offering an excellent balance of strength, corrosion resistance, and machinability.
Common Grades: 6061, 7075, 5052, 2024-T851.
Applications: Automotive, aerospace, marine, structural, and electronics.
Surface Finishes: Anodizing, chromate conversion coating, brushing, polishing, bead blasting, and powder coating.
Tip:
6061 is a versatile choice for general machining, while 7075 offers higher strength for demanding applications.
Brass
Excellent machinability, good strength, corrosion resistance, and ductility.
Available Grades: C360, C260.
Applications: Fittings, fasteners, valves, terminals, and radiator components.
Surface Finishes: As Machined, Polished, Nickel Plated, Chrome Plated.
Tip:
C360 is ideal for high-volume turning with excellent chip breaking, while C260 may require effective chip breakers and high-pressure coolant.
Stainless Steel
Excellent corrosion resistance, strength, durability, and machinability.
Available Grades: 304/L, 316/L, 17-4 PH.
Applications: Medical equipment, kitchenware, marine equipment, aerospace, chemical processing, and industrial components.
Surface Finishes: Passivation, Electropolishing, Brushed, Bead Blasting, Heat Treatment.
Tip:
Use sharp tools and consistent feed rates to minimize work hardening. For 316/L, reduce cutting speeds to control heat buildup. Machine 17-4 PH in the annealed condition before heat treatment.
Steel
High strength, good machinability, and excellent durability for a wide range of industrial applications.
Available Grades: 1018 Mild Steel, 4140 Alloy Steel.
Applications: Mounts, brackets, gears, shafts, bolts, couplings, and other industrial components.
Surface Finishes: Zinc Plating, Black Oxide, Powder Coating, Heat Treatment.
Tip:
Apply plating or protective coating to mild steel after machining to prevent rust. For alloy steel, use a rigid tool setup to handle higher cutting forces.
Copper
Excellent electrical and thermal conductivity, with good machinability and corrosion resistance.
Available Grades: C110, C101.
Applications: Bus bars, heat sinks, electrical contacts, terminals, connectors, and other electrical components.
Surface Finishes: As Machined, Polished, Silver Plated, Nickel Plated.
Tip:
Use sharp, polished tools with high rake angles to minimize burrs. High-purity copper grades are more costly and should be used only when required by the application.
High-Speed Steel
High-Speed Steel (HSS) offers excellent hardness, wear resistance, toughness, and heat resistance.
Excellent hardness, wear resistance, toughness, and heat resistance for demanding tooling and machining applications.
Available Grades: M2, M35, M42, SKH-9,ASP 23, ASP60.
CNC Tip:
Requires low cutting speeds and high coolant flow to prevent heat buildup and fire risk.
Tungsten Carbide
Tungsten Carbide offers exceptional hardness, wear resistance, and dimensional stability for demanding tooling applications.
Available Grades: KD20, CD650, YG20, K20, K30, K40.
Applications: Punches, dies, mold inserts, cutting tools, and wear-resistant components.
Surface Finishes: Grinding, Polishing, PVD Coating.
Tip:
Use rigid tooling and appropriate cutting parameters to minimize chipping and achieve a consistent surface finish.
Tool Steel
Tool Steel offers excellent wear resistance, toughness, and edge retention for demanding tooling applications.
Available Grades: A2, D2, SKD11, SKD61, DC53
Applications: Dies, punches, mold components, shearing blades, and stamping dies.
Surface Finishes: Grinding, Polishing, PVD Coating, Nitriding.
Tip:
Leave sufficient grinding allowance for tight tolerances after heat treatment. D2 is harder to grind than A2, so use appropriate grinding wheels and parameters to minimize the risk of cracking.
Engineering Plastics
Engineering Plastics offer excellent wear resistance, chemical resistance, low friction, and dimensional stability for demanding industrial applications.
Available Types: POM, PA, PTFE, PEEK, PC, and UHMW-PE.
Applications: Bushings, bearings, gears, rollers, guides, seals, and insulating components.
Finishes: As Machined, Polished.
Tip:
Use sharp tools and proper cutting parameters to minimize heat buildup and deformation during machining.
Special Alloys
Special Alloys offer excellent strength, corrosion resistance, heat resistance, and wear resistance for demanding industrial applications.
Tip:
Use sharp tools, rigid setups, and controlled cutting parameters to manage heat buildup and tool wear.
Only common materials are shown here. We offer many more specialty options. Contact us if you don’t see what you need.
Surface Finishing & Heat Treatment Services
Finish Specs
Materials
Technical Description & Cost
As machined
Metals & Plastics
Raw finish directly from CNC. The most economical choice with tightest tolerances. Visible tool marks present.
Smooth machining
Metals & Plastics
Machined at lower feed rates. Less visible tool marks, better sealing properties and reduced friction.
Polishing
All Materials
Smoothing to remove tool marks. Essential for optical parts, molds, or reducing friction.
Bead Blasting
Plastics
Bombarded with glass beads for a uniform matte finish. Hides tool marks. Note: Affects dimensions.
Tumbled
Plastics
Batch process with vibrating media. Removes sharp edges (deburring) and smooths geometry.
Anodizing Type II (Matte)
Aluminum
Corrosion-resistant oxide layer. Matte finish achieved by bead blasting prior to anodizing. Non-conductive.
Anodizing Type II (Glossy)
Aluminum
Standard Type II anodizing applied to a polished/smooth surface. Vibrant, shiny appearance.
Anodizing Type III (Hardcoat)
Aluminum
Thick, dense oxide layer (25-50μm). Extreme wear resistance (60-70 HRC). Limited color options (Dark).
Powder Coated
All Metals
Dry powder fused by heat. Strong, thick plastic skin (~80μm). Superior durability to wet paint.
Black Oxide
Conversion coating. Anti-glare, mild corrosion resistance (needs oil). Negligible thickness change.
Heat Treatment
Mold Steels，High-Speed Steel (HSS)
Heat treatment and deep cryogenic treatment improve hardness, wear resistance, toughness, and dimensional stability, helping extend the service life of molds and precision components.
Nitriding
Punches, dies, mold inserts,
A surface hardening treatment that improves surface hardness, wear resistance, and fatigue strength, helping extend the service life of molds and tooling.
PVD Coatings
PVD coatings provide high surface hardness, excellent wear resistance, and reduced friction, helping extend tool life and improve performance in demanding applications.
Specialist industries
Why Choose Skypu?
Experienced Professionals
High Precision Accuracy
Cost-Effective Solutions
Quality Assurance
Excellent Customer Service
Rapid Turnaround Time
Precision Manufacturing. Built for Your Success.
Skypu is a precision manufacturing partner in China, specializing in high-precision components, custom tooling, molds, and industrial parts.
With advanced machining capabilities and strict quality control, we manufacture complex components to demanding specifications for automation, connectors & electronics, semiconductor equipment, automotive, medical devices, and industrial applications.
From prototypes to repeat production, we provide flexible manufacturing solutions, responsive support, and reliable international delivery to help customers turn their designs into quality products.
Precision You Can Trust. Quality You Can Rely On.
Strict QC Workflow
Advanced Inspection
Material & Production Traceability
ISO 9001:2015 Certified
Precision Machine Shop
Frequently Asked Questions
After receiving your CAD files or drawings, our engineering team reviews key factors such as geometry, tolerances, wall thickness, tool accessibility, radii, threads, and material requirements.
If potential manufacturing issues are identified, we provide practical recommendations on design optimization, tolerances, machining processes, and material selection to help ensure stable and repeatable production.
This early review helps reduce design changes, control manufacturing costs, and improve production efficiency before machining begins.
Lead times depend on part complexity, tolerance requirements, material, surface treatment, and order quantity. For most prototype and small-batch projects, production can typically be completed within a few working days, while complex components or multi-process projects may require additional time.
For urgent projects, expedited production may also be available. To provide an accurate lead time, simply send us your 2D drawings or 3D files, material requirements, and quantity. Our engineering team will review the project and confirm the estimated lead time during the quotation process.
Yes. We can provide material certificates, inspection reports, and other quality documentation based on project requirements. Our inspection records cover key dimensions, tolerances, hardness, and other specified requirements to support full quality verification and traceability.
The cost depends on factors such as part geometry, material, tolerances, surface treatment, machining processes, and order quantity. We provide competitive pricing based on your specific requirements while maintaining consistent quality.
Simply send us your 2D drawings or 3D files, material requirements, and quantity, and our engineering team will review the project and provide a detailed quotation.
At Skypu, every part undergoes dimensional inspection, material verification, and final quality control. Critical features can be inspected 100%, with inspection reports available upon request to help ensure parts meet the agreed specifications.
If a delivered part does not meet the specified requirements, our quality team will promptly review the issue and identify the root cause. Customers can provide measurement data, photos, or other inspection results to support the investigation.
We take quality issues seriously and work with our customers to determine the appropriate solution, which may include rework, replacement, refund, or credit, depending on the specific situation. Corrective and preventive actions are documented when applicable to support traceability and continuous improvement.
