Zinc CNC Machining Services

Precision Machined Zamak & Zinc Alloy Parts with Fast Lead Times

- ±0.01 mm tolerances
- CNC milling, turning, tapping & finishing
- Zamak 3 / Zamak 5 / ZA-8 / ZA-27
- Prototype to high-volume production
- ISO 9001 quality control

TOPS Precision specializes in high-performance zinc machining, combining advanced multi-axis CNC technology with skilled engineering to deliver strong, detailed, and efficient components. We serve the automotive, electronics, HVAC, and consumer product sectors with precision parts held to tolerances as tight as ±0.01 mm.

From low-volume prototypes to high-volume production, we ensure high quality, fast turnaround, and tight tolerances. As a one-stop zinc machining partner, we handle everything—from material selection and tooling to machining, finishing, and final inspection—streamlining your supply chain and accelerating your time to market.

What are Zinc and Its Alloys?

Zinc is a highly corrosion-resistant, bluish-white metal prized for its exceptional formability, recyclability, and cost-effectiveness. While pure zinc (typically ochre or gray) sees limited practical use, TOPS Precision expertly enhances its performance by alloying it with aluminum, copper, or magnesium, creating high-quality Zamak and ZA alloys. These advanced alloys are valued for their superior mechanical strength, excellent wear resistance, and versatile machinability, making them ideal for precision casting and high-accuracy machining applications across diverse industries.

What Is Zinc Machining?

Machining zinc alloys involves specialized CNC processes such as milling, turning, drilling, tapping, and finishing. While zinc’s inherent softness and ductility make machining straightforward, achieving exceptional quality demands precise control to avoid common issues like burr formation, material deformation, or tool buildup.

At TOPS Precision, we leverage advanced CAD/CAM modeling and high-speed CNC machining centers specifically optimized for soft-metal machining. Our experienced engineers select premium-grade carbide cutting tools, meticulously calculated speeds and feeds, and high-quality lubricants to ensure clean cuts, minimal tool wear, and unmatched precision—guaranteeing consistent, superior results for every project.

How Zinc Machining Works?

Zinc machining involves shaping zinc or zinc alloy components using high-precision tools, typically through advanced CNC (Computer Numerical Control) processes. Thanks to zinc’s excellent machinability, operations such as cutting, drilling, milling, turning, and tapping can be performed at high speeds with minimal tool wear. At TOPS Precision, we utilize state-of-the-art CAD software to generate detailed part designs, which are then translated into precise tool paths—ensuring every cut meets strict dimensional and performance specifications.

Our high-performance CNC lathes and mills are configured to machine zinc billets or die castings layer by layer, achieving tight tolerances and consistently smooth surface finishes. While zinc dissipates heat moderately during machining, we apply lubricants and coolants selectively to maintain optimal thermal conditions. To prevent burrs or deformation, we rely on high feed rates, razor-sharp carbide tools, and rigid fixturing. Post-machining, components undergo professional deburring, polishing, and optional surface coatings—enhancing both durability and cosmetic appeal to meet the highest industry standards.

Properties of Zinc

Here are some of the properties of zinc:

Excellent Machinability
Zinc alloys are among the most machinable metals, typically rated above 90% machinability. At TOPS Precision, we leverage this advantage using high-speed CNC equipment to achieve faster cutting, longer tool life, and highly efficient large-scale production. This makes zinc ideal for high-volume, cost-effective machining projects.
Corrosion Resistance
Zinc naturally forms a protective zinc oxide layer, which resists oxidation and corrosion. Our zinc components are engineered for durability in harsh environments, including automotive, outdoor, and industrial applications—where long-lasting performance is critical.
Low Melting Point
With a melting point of 419.5°C (787°F), zinc is ideal for casting and thermal processing. At TOPS, we optimize this property to enable easy mold filling, lower energy consumption, and efficient integration with high-precision die casting workflows.
Dimensional Stability
Zinc alloys exhibit minimal shrinkage and excellent thermal stability, allowing our team to machine parts to tight tolerances with high repeatability. This makes our zinc components suitable for precision applications where dimensional accuracy and long-term stability are essential.
Good Strength and Toughness
Zinc alloys offer a reliable balance of strength and ductility. We specialize in machining high-performance grades like ZA-12 and ZA-27, enabling structural parts with enhanced mechanical properties for both light-duty and demanding load-bearing applications.
Electrical Conductivity
Zinc’s moderate electrical conductivity makes it suitable for components such as electrical housings and terminals. At TOPS, we machine zinc parts that perform well where conductivity and corrosion resistance must coexist, especially in electrical and electronics sectors.
High Density
With a density of around 6.6 g/cm³, zinc gives components a solid, premium feel. This makes it perfect for machined products like luxury handles, fixtures, and consumer goods, where weight and substance enhance the perception of quality.
Recyclability
Zinc is 100% recyclable without any loss in performance. Our machining operations prioritize sustainable practices, allowing us to recycle and reuse zinc materials efficiently—providing clients with economical and environmentally responsible solutions.

Our Types of Zinc Alloys for Machining

The following are different types of zinc alloys along with their properties:

Alloy	Composition	Key Properties	Best Applications
Zamak 3	Zn + ~4% Al	Most commonly used; excellent surface finish	Consumer electronics, housing
Zamak 5	Zn + ~4% Al + 1% Cu	Higher strength;,more wear-resistant	Gears, locks, fittings
Zamak 7	Zn + Al + low Mg	Better casting flow, great for small details	Connectors, intricate components
ZA-8	Zn + ~8% Al	Stronger; impact-resistant; easily machined	Brackets, handles, hardware
ZA-12/ZA-27	Zn + 12–27% Al	Very high strength; used for structural parts	Bushings, bearings, and high-load mechanisms

Our Different Zinc Machining Processes

The following are some of the main machining processes that we can provide on zinc:

CNC Milling
Ideal for 2D and 3D zinc components such as enclosures, housings, and mounting plates. At TOPS Precision, we utilize advanced multi-axis CNC milling to achieve complex contours with high dimensional accuracy and repeatability—perfect for both prototyping and mass production.
CNC Turning
Best suited for cylindrical zinc parts like shafts, bushings, and pins. Our high-precision CNC lathes ensure exceptional concentricity, fine surface finishes, and fast cycle times, making us a trusted partner for tight-tolerance round components.
Tapping and Drilling
We deliver clean, accurately machined holes and threads for fasteners, connectors, or pressure-tight systems. With automated tapping heads and optimized drill parameters, we ensure high consistency and structural integrity in every part.
Reaming and Boring
Used to fine-tune hole diameters and ensure perfect alignment in mechanical assemblies. Our precision reaming and boring processes help eliminate tolerance stack-up, allowing for seamless part fitment in critical applications.
Deburring
Our meticulous deburring processes remove sharp edges, chips, and machining residues to improve component functionality, safety, and aesthetic appeal—all while maintaining tolerance integrity.
Engraving and Profiling
Whether it’s part numbers, serial codes, or branding, our high-accuracy CNC engraving ensures durable, legible markings directly onto zinc surfaces—ideal for traceability, identification, and product authentication.

Choosing the Correct Zinc Alloy to Machine

The selection of zinc alloy is important in terms of the performance of their parts and cost-effectiveness:

Zamak 3 – Best suited for cosmetic parts, tight-tolerance components, and high-quality die casting, offering excellent surface finish and dimensional stability.
Zamak 5 – Ideal for structural components or load-bearing parts, providing enhanced strength and hardness for demanding mechanical applications.
Zamak 7 – Recommended for fine-walled or intricate parts, offering superior fluidity and castability for highly detailed geometries.
ZA-8 – A great choice for medium-load or high-impact applications, combining strength with excellent machinability.
ZA-12 / ZA-27 – Engineered for high-stress, heavy-wear parts that require consistent performance and repeated flexibility under load.
At TOPS Precision, our engineering team works closely with clients to analyze application requirements, production volumes, and finishing needs—ensuring the optimal alloy is selected for performance, efficiency, and cost-effectiveness.

Designing Guidelines for Zinc Machining

When designing zinc components for machining, it’s essential to account for material behavior, machinability, and dimensional stability. At TOPS Precision, we guide our clients with proven design recommendations—including optimal wall thickness, tight tolerance control, and precise thread features—to ensure the production of high-quality, cost-effective parts that perform reliably and meet all functional requirements.

Design Element	Recommendation	Reason/Benefit
Wall Thickness	Keep uniform; minimum ~0.8–1.0 mm	Prevents warping, ensures structural integrity
Fillets & Radii	Use internal fillets ≥ 0.5 mm	Reduces tool wear and stress concentration
Bosses & Ribs	Avoid overly tall or thin features	Prevents vibration and improves stability during machining
Draft Angles	Use minimal or no draft when machining (vs casting)	Enhances dimensional accuracy
Hole Depth	Limit depth-to-diameter ratio to ≤ 5:1	Prevents tool deflection and breakage
Threading	Use standard thread sizes; allow a chamfer at the start	Ensures clean thread entry and tool access
Tolerances	Design for achievable tolerances of ±0.025 mm or better	Balances cost and precision
Undercuts & Recesses	Minimize or use specialized tooling	Avoids tool collisions and reduces cost
Surface Finish	Avoid unnecessary polishing specs	Zinc already offers a good surface finish after machining
Assembly Fit	Account for thermal expansion and zinc softness	Ensures a reliable press-fit or mating

Expert Machining Tips for High-Quality Zinc Parts

Here are some expert tips for high-quality zinc parts:

Minimize burrs by using ultra-sharp carbide cutting tools designed for soft metals.
Operate machines at high spindle speeds with low cutting pressure to maintain surface integrity.
Apply lightweight cutting fluids to ensure effective chip evacuation and temperature control.
Incorporate generous radii and rounded edges in part designs to enhance flow and machinability.
Maintain low clamping pressure during machining to prevent distortion in zinc’s soft, ductile alloys.

Our Precision Capability Table

Capability	Value
CNC Tolerance	±0.01 mm
Max Part Size	500 mm
MOQ	1 Piece
Lead Time	3–15 Days
Surface Finish	Ra 0.8
Materials	Zamak / ZA Alloys

How Does Zinc Machining Compare to Other Metals?

Here is a comparison of Zinc with other metals:

Property	Zinc	Aluminum	Steel
Machinability	Excellent	Very Good	Moderate
Corrosion Resistance	High	Good	Low (needs coating)
Weight	Medium	Light	Heavy
Cost	Low	Moderate	High
Surface Finish Quality	Smooth	Good	Requires polishing
Casting Compatibility	Excellent	Good	Poor

Our Options for Surface Finishing

At TOPS Precision, we offer a range of advanced post-processing and finishing techniques to enhance both the functionality and appearance of your zinc components:

Polishing – Achieves a high level of surface smoothness and visual appeal for premium aesthetics.
Chrome/Nickel Plating – Adds a bright, durable finish with enhanced corrosion resistance for demanding environments.
Powder Coating – Provides long-lasting protection with uniform color and excellent surface durability.
Vibratory Finishing – Delivers consistent deburring and surface texturing, ideal for high-volume parts.
Passivation – Improves oxidation resistance, extending the lifespan of zinc parts in corrosive settings.

Applications of Zinc Machining

At TOPS Precision, our expertly machined zinc components are used across a wide range of industries, including:

Electrical systems – contactors, connectors, and terminals requiring conductivity and corrosion resistance
Automotive – precision parts such as gear cases, brackets, and housing components
Consumer electronics – durable hardware enclosures and mounting structures
HVAC systems – heat-resistant, corrosion-protected structural components
Mechanical assemblies – high-precision enclosures and fittings for critical applications

Applications of Zinc Machining

Zinc machining with TOPS Precision offers several key advantages:

Exceptional machinability with extended tool life on high-speed CNC equipment
High castability, allowing production of parts with complex geometries and fine details
Excellent corrosion resistance, ideal for long-term performance in harsh environments
Eco-friendly and fully recyclable, supporting sustainable manufacturing practices
Smooth surface finishes, ideal for direct plating with chrome, nickel, or decorative coatings

Challenges of Zinc Machining

While zinc is highly machinable, it presents specific challenges that require expert handling:

As a soft metal, zinc can easily produce burrs if not machined with precision tools and optimized settings.
High clamping pressure may lead to part distortion due to zinc’s ductility.
Post-machining stress relief may be necessary to maintain dimensional stability.
Efficient chip evacuation is essential to prevent tool buildup and ensure a clean machining process.

5 Tips on How to Save Cost on Zinc Machining

Here are our proven strategies at TOPS Precision to help clients reduce production costs without sacrificing quality:

Select the Right Alloy Early – Match the zinc alloy to your functional and structural requirements for optimal performance and efficiency.
Design for Manufacturability – Avoid extremely thin walls and undercuts to ensure better machining results and lower production risk.
Scale Up with Batch Production – Reduce per-unit costs by taking advantage of our high-volume production capabilities.
Minimize Unnecessary Handling – Optimize workflows to focus on essential machining steps, reducing labor and material handling costs.
Partner with Experts – Collaborate with our specialized team to plan machining operations for best results in terms of time, quality, and cost.

Create Machined Zinc Parts with TOPS Precision

At TOPS Precision, we combine high-speed CNC technology, skilled machinists, and rigorous quality standards to transform complex designs into reality. Whether you need intricate zinc connectors or large-volume industrial components, we deliver unmatched precision, reliability, and efficiency—on time and within budget.

Simply send us your 3D CAD files or technical drawings to get started with a fast quote and engineering review.

Our Servicing of Zinc Machining is Guaranteed

All zinc machining projects at TOPS Precision are covered by our strict quality and delivery commitments:

ISO 9001:2015 Certified Quality System – Comprehensive process controls, in-process inspection, and continuous improvement ensure dependable results for every order.
Full Inspection & Material Traceability – Each batch is backed by 100% dimensional inspection (upon request) and traceability through heat numbers and material certifications.
98% On-Time Delivery – Supported by real-time production tracking and optimized logistics to meet critical deadlines.
96% Customer Satisfaction – We provide rapid after-sales support, including issue resolution within 24 hours and ongoing technical assistance to keep your production running smoothly.

Why Buyers Choose TOPS Precision for Zinc Parts

Fast quotation within 24 hours
DFM feedback before production
Tight tolerance CNC machining
Chrome / nickel / powder coating available
Small MOQ accepted
Global export support
Stable mass production quality

FAQs About Zinc CNC Machining

Q1: What zinc alloys can you machine?

We machine Zamak 3, Zamak 5, Zamak 7, ZA-8, ZA-12, and ZA-27.

Q2: What tolerance can zinc machining achieve?

Typical tolerance is ±0.01 mm depending on geometry.

Q3 Can you plate zinc machined parts?

Yes. Nickel plating, chrome plating, powder coating, and passivation are available.

Q4: What is your MOQ?

We support prototype orders from 1 piece to mass production.

Q5: How fast can you deliver?

Prototype parts can ship in as fast as 3–7 days.

Zinc CNC Machining Services

Precision Machined Zamak & Zinc Alloy Parts with Fast Lead Times

Send Your Inquiry Today

What are Zinc and Its Alloys?

What Is Zinc Machining?

Send Your Inquiry Today

How Zinc Machining Works?

Properties of Zinc

Excellent Machinability

Corrosion Resistance

Low Melting Point

Dimensional Stability

Good Strength and Toughness

Electrical Conductivity

High Density

Recyclability

Send Your Inquiry Today

Our Types of Zinc Alloys for Machining

Send Your Inquiry Today

Our Different Zinc Machining Processes

CNC Milling

CNC Turning

Tapping and Drilling

Reaming and Boring

Deburring

Engraving and Profiling

Send Your Inquiry Today

Choosing the Correct Zinc Alloy to Machine

Send Your Inquiry Today

Designing Guidelines for Zinc Machining

Send Your Inquiry Today

Expert Machining Tips for High-Quality Zinc Parts

Send Your Inquiry Today

Our Precision Capability Table

Capability

Value

Send Your Inquiry Today

How Does Zinc Machining Compare to Other Metals?

Send Your Inquiry Today

Our Options for Surface Finishing

Send Your Inquiry Today

Applications of Zinc Machining

Applications of Zinc Machining

Send Your Inquiry Today

Challenges of Zinc Machining

Send Your Inquiry Today

5 Tips on How to Save Cost on Zinc Machining

Send Your Inquiry Today

Create Machined Zinc Parts with TOPS Precision

Send Your Inquiry Today

Our Servicing of Zinc Machining is Guaranteed

Why Buyers Choose TOPS Precision for Zinc Parts

Send Your Inquiry Today

FAQs About Zinc CNC Machining

Let's Start A New Project Today

Send Your Inquiry Today