🟡 BRASS
Brass Machining & Suppliers in Kalamazoo, MI
Brass is the material that makes high-volume turned parts economical, and Kalamazoo's screw-machine and CNC shops run a lot of it. Fittings, valve components, fasteners, and fluid hardware in C360, C260, and Naval brass move through local suppliers in large quantities. This page covers what makes each grade the right pick and how to source brass parts efficiently.
ISO 9001ISO 13485ISO 14001
Brass and High-Volume Turned Parts
Brass earns its place in Kalamazoo manufacturing through machinability. The free-machining grades cut faster, cleaner, and with longer tool life than almost any other metal, which makes them the natural choice for high-volume turned parts: fittings, valve bodies, connectors, fasteners, and fluid-system components produced by the thousands on screw machines and CNC lathes. When a part needs to be made in quantity with good corrosion resistance and a clean finish, brass is often the lowest-cost path.
That productivity is why Kalamazoo's automotive suppliers and fluid-component makers lean on brass for plumbing, pneumatic, and hydraulic hardware, and why medical-equipment builders use it for non-implant fittings and instrument components. The region's screw-machine capacity is built around exactly this kind of work, where cycle time per part drives cost and brass's machinability is the deciding factor.
The grade choice within brass comes down to how the part is made. A part that is primarily turned and machined wants the fastest free-machining grade. A part that is formed, bent, or drawn needs a grade with more ductility. A part exposed to seawater or aggressive fluids needs a corrosion-optimized grade. Matching the grade to the process and environment is the core of brass sourcing.
C360, C260, and Naval Brass
C360 free-cutting brass is the benchmark for machinability, often treated as the 100% reference against which other metals' machinability is rated. Its lead content makes chips break cleanly and tools last, allowing very high spindle speeds and excellent surface finish. It is the default for high-volume turned fittings, valve components, fasteners, and precision machined parts, and it is what most Kalamazoo screw-machine work runs on. Note that lead-content regulations for potable-water and certain medical applications may require a low-lead alternative, so confirm the end use.
C260 cartridge brass is the high-ductility grade. With a 70/30 copper-zinc ratio, it is far more formable than C360, so it is the choice for parts that are deep drawn, stamped, bent, or spun rather than primarily machined. It machines acceptably but not nearly as fast as C360; its value is formability, making it common for enclosures, formed terminals, and drawn components.
Naval brass adds tin to a copper-zinc base to resist dezincification and corrosion in marine and aggressive-fluid environments. It trades some machinability for durability in seawater and high-chloride service, making it the right call for marine hardware, valve and pump components exposed to corrosive media, and fittings that would fail in standard brass. Choosing it is about environment, not productivity.
Lead-Free Requirements and Finishing
A critical sourcing consideration with brass is lead content. C360 owes much of its machinability to lead, but regulations such as those governing potable-water components and some medical and consumer applications restrict lead. For those uses, low-lead or lead-free brasses are required, and they machine somewhat slower and may cost more. If your brass part contacts drinking water or falls under a lead-restriction standard, flag it in the RFQ so the shop quotes the correct compliant alloy rather than standard C360. Getting this wrong is a compliance problem, not just a material substitution.
Finishing brass is usually about appearance and corrosion. Many brass parts ship as-machined because brass already resists corrosion well, but parts may be polished, plated (nickel or chrome for appearance and added protection), or passivated to control tarnish. For fluid components, cleanliness and deburring matter because brass chips and burrs in a fluid path cause problems downstream. When sourcing, specify finish and cleanliness requirements, and for fluid hardware confirm the shop's deburring and cleaning process is up to the application.
Sourcing Brass Parts in Kalamazoo
Match the grade to how the part is made and where it lives. Turned, machined parts in quantity go to C360 on screw machines or CNC lathes; formed and drawn parts call for C260; marine and corrosive-fluid parts need Naval brass. And always raise lead-content requirements up front if the part touches potable water or falls under a restriction standard.
For high-volume brass, the right shop is one with the screw-machine or multi-axis turning capacity to hold your cost target while maintaining quality and consistency across a long run. ISO 9001 covers most brass work; ISO 13485 matters for medical components; ISO 14001 can be relevant for environmentally driven sourcing. ManufacturingBase lets you filter Kalamazoo-area brass suppliers by capability, certification, and turning capacity so you can match a high-volume turned part to the right shop quickly.
Frequently Asked Questions
C360 free-cutting brass is often used as the 100% reference point on machinability rating scales, meaning other metals are rated as a percentage of how well they machine compared with C360. The reason is its lead content: small lead particles dispersed through the brass act as internal chip breakers and lubricants during cutting. As the tool engages, chips break into small, manageable pieces rather than forming long stringy curls, tool wear stays low, cutting forces are modest, and the resulting surface finish is excellent. This lets shops run C360 at very high spindle speeds with long tool life, which is exactly what high-volume turned-part production needs. For Kalamazoo screw-machine and CNC turning shops producing fittings, valve components, and fasteners by the thousands, that machinability translates directly into low cost per part. The one caveat is the lead itself: regulations restricting lead in potable-water components and certain medical and consumer applications mean standard C360 cannot always be used, and a low-lead or lead-free brass must be substituted. Those compliant grades machine somewhat slower. So while C360 is the productivity benchmark, always confirm your end use does not fall under a lead restriction before specifying it.
The choice between C260 and C360 comes down to how the part is manufactured. C360 free-cutting brass is optimized for machining and is the right choice when the part is primarily turned, milled, or drilled, because it cuts fast with excellent chip control and finish. However, C360 is relatively low in ductility and does not form well; it tends to crack if you try to deep draw, bend, or spin it. C260 cartridge brass, with its 70/30 copper-zinc composition, is far more ductile and formable, so it is the correct grade for parts made by deep drawing, stamping, bending, or spinning, such as enclosures, formed terminals, drawn cups, and sheet components. The trade is that C260 machines noticeably slower than C360, so you would not choose it for high-volume turned work. The simple rule: if the part is machined from bar, specify C360; if the part is formed from sheet or strip, specify C260. If a part involves both significant forming and machining, share the full process with the shop so they can recommend the best grade or sequence. Telling the shop how the part is made, not just the alloy, prevents the common mismatch of trying to form C360 or machine large volumes of C260.
Naval brass is a copper-zinc brass with a small tin addition (typically around 1%) that significantly improves its resistance to corrosion in marine and high-chloride environments. Standard brasses are vulnerable to dezincification, a corrosion process in which zinc is selectively leached out, leaving a weak, porous copper structure that can fail; the tin in Naval brass inhibits this, making it durable in seawater, brackish water, and aggressive fluid service. You need Naval brass when a part will be exposed to seawater or other corrosive, high-chloride media that would degrade ordinary brass, such as marine hardware, valve and pump components in corrosive fluid systems, and fittings in coastal or process environments. The trade-off is that Naval brass machines somewhat less freely than C360 free-cutting brass and typically costs more, so you would not use it for general dry-environment parts where standard brass is fine. The decision is driven entirely by the service environment, not by machinability or appearance. When sourcing in Kalamazoo, describe the fluid the part will contact and its chloride exposure, and the shop can confirm whether Naval brass is warranted or whether a standard or low-lead brass will perform adequately at lower cost.
Lead-free and low-lead regulations have a direct impact on brass sourcing because the most machinable common grade, C360, relies on lead for its excellent machinability. Standards governing potable-water components (such as those derived from the Safe Drinking Water Act's lead limits) and certain medical and consumer applications restrict the allowable lead content, which means standard leaded brass cannot be used for those parts. Instead, low-lead or lead-free brass alloys must be specified. These compliant alloys achieve corrosion resistance and adequate strength but generally machine somewhat slower than C360 and can cost more, which affects both cycle time and price on high-volume turned parts. The most important thing a buyer can do is flag any lead restriction in the RFQ up front, clearly stating if the part contacts drinking water or falls under a specific lead standard. That lets the shop quote the correct compliant alloy from the start rather than assuming standard C360, which would be a compliance failure if the part ships into a restricted application. If you are unsure whether your application is covered, describe the end use and any applicable standards, and an experienced Kalamazoo brass supplier can advise on the right compliant grade. ManufacturingBase helps you find local shops experienced with low-lead and lead-free brass.
Last updated: July 2026
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