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Picking the wrong bronze grade for a bushing or bearing is an expensive mistake. Parts wear out early, corrode faster than expected, or machine poorly and slow your operation down. Precision Ground Metals stocks a full range of bronze rounds at our Palos Hills, IL, facility, and we’ve been helping manufacturers across the Chicago area get the grade right for over 30 years.
Bronze is not one material. It’s a family of alloys, and each grade behaves differently under load, in corrosive environments, and on the machine. This guide walks you through every grade we carry so you can match the right one to your bushing or bearing application before you order.
Bronze Grades for Bushings and Bearings: What Each One Does and When to Use It
Not every bronze grade belongs in a bushing or bearing. Some are built for high load. Others resist corrosion better. A few machine exceptionally well and are perfect for high-volume CNC runs. Knowing what separates each grade saves you from a costly substitution later.
The grades Precision Ground Metals carries cover the full range of bushing and bearing demands. From general industrial bearings to heavy marine hardware and precision electrical components, each alloy has a job it does better than the others. Start with your application requirements, then match the grade.
Phosphor Bronze: C51000, C52100, C54400
Phosphor bronze is the first choice for moderate-load bushing applications. These three grades deliver high strength, solid wear resistance, and reliable corrosion resistance. They also handle cyclic stress well, which makes them a good fit for parts that see repetitive motion every cycle.
C54400 is the most machinable of the three grades and is a practical choice for high-volume CNC production runs. All three grades are also used for springs and electrical connectors, so if your bushing doubles as a contact element, phosphor bronze handles both roles without compromise.
Bearing Bronze: C93200, C93600, C93700
These three grades exist specifically for bearings, bushings, and thrust washers. The lead content reduces friction at the contact surface and improves machinability. Both qualities matter when you’re producing bushings in quantity and need consistent dimensions through the full run.
C93200 is the most widely used bearing bronze in general industrial work. If your application doesn’t involve extreme corrosion exposure, this is the grade to start with. C93600 and C93700 offer slightly different lead and tin balances for applications with varying load and speed conditions.
Aluminum Bronze: C95400, C95500, C95900
Aluminum bronze handles situations where load and corrosion show up together. These grades carry higher strength than phosphor bronze and better corrosion resistance than bearing bronze. Marine environments, chemical processing lines, and aerospace components are where we see them specified most often.
If your bearing housing sits near saltwater or process chemicals and still takes real mechanical stress, aluminum bronze gives you both. It also works well in heavy-duty gear applications where a softer bronze grade would compress and fail under sustained load.
Manganese Bronze: C86300, C86400, C86500
Manganese bronze brings the highest strength in the bronze family. These grades are designed for gears, hydraulic cylinder components, and marine hardware that absorb shock loads and heavy mechanical stress. They hold up where other grades deflect or deform under pressure.
Corrosion resistance is more limited in manganese bronze than in aluminum bronze. This is the right call when the primary threat is mechanical, not chemical. If your application involves high shock load and the environment is controlled, manganese bronze is a strong fit.
Silicon Bronze: C65500
Silicon bronze fills a specific gap that other grades cannot cover. It offers good corrosion resistance and welds cleanly after machining. For marine hardware, electrical component housings, and parts that need post-machining fabrication, no other bronze grade in our catalog matches it.
It is not the first choice for a heavily loaded bushing. The strength is moderate compared to aluminum or manganese bronze. But when corrosion resistance and weldability are both required in the same part, C65500 is the grade that solves the problem cleanly.
How Bar Stock Quality Affects Your Finished Part
The bar stock you start with affects everything downstream. Precision Ground Metals supplies bronze rounds as cylindrical bars with precision-ground edges available. Ground stock reduces the material your shop removes to reach final dimensions, and the consistent surface quality carries through to the finished bushing or bearing.
Our value-added services include cutting to exact lengths, straightening to strict tolerances, chamfering bar ends for burr-free installation, and protective packaging so the material arrives ready for your production floor.
Start Your Order Today
Choosing a bronze grade is easier when you have the full picture. If you know your grade, we’re ready to quote right now. If you’re still deciding, send us your application details, and we’ll help you get there.
Call us at (708) 400-7217, email sales@precisiongroundmetals.com, or submit your request through our Request A Quote form on the website.
FAQs
What is the best bronze grade for general bushing work?
C93200 bearing bronze is the most widely used grade. It machines well, reduces friction at the contact surface, and performs reliably in plain bearings and sleeve bushings.
When should I choose aluminum bronze over phosphor bronze?
Choose aluminum bronze when load and corrosion exposure combine. Phosphor bronze suits moderate load and cyclic stress applications where corrosion is not the main concern.
Does Precision Ground Metals supply precision-ground bronze bar stock?
Yes. We supply bronze rounds as cylindrical bars with precision-ground edges available. Ground stock reduces your shop’s stock removal and delivers a consistent surface finish.
How do I place an order for bronze rounds?
Submit a Request A Quote form on our website, call (708) 400-7217, or email sales@precisiongroundmetals.com.
