June 6, 2017by admin0

National Bronze Mfg.

Roseville, MI – National Bronze Manufacturing Company, a leading manufacturer and distributor of copper alloy machined parts, bar, tube, and plate, is proud to announce the addition of a new 20,000 square foot building and an additional one acre of undeveloped land for future growth.

“The additional facility will be used to accommodate the companies growing product range. This investment reflects the long term commitment of the ownership to our customers, employees, and to the community. The success we are enjoying is the direct result of the hard work and dedication of all of our employees” Russo states. “National Bronze exists for the purpose of serving its customers, employees, and stockholders. We have listened to all parties and we are reacting accordingly.”

About National Bronze Mfg. Co.

National Bronze Mfg. is a leading manufacturer and distributor of copper alloy based products. Since 1911 National Bronze Mfg. has grown to become one of North America’s largest manufacturers of bronze bushings, bearings, and other industrial components. National Bronze Mfg. is also a full metal service center supplying bronze, brass, and copper bar, tube, and plate to customers worldwide. With an expertise in copper alloy based products National Bronze Mfg. services customers in a wide variety of industries.

National Bronze Mfg. Co.

28070 Hayes Road

Roseville, MI 48066

Phone: 5867912000


Michael Russo

VP Business Development



January 2, 2017by admin0



Imagine having the technical knowledge of over 105 years of bronze product manufacturing right at your fingertips.  Think of how one on one live technical assistance could make you job easier and more efficient.

Feel like a VIP and experience the best customer service in the industry.

  • Expedited lead times
  • Amazing quote turnaround
  • Customized programs developed specifically for your needs

Something like this would generally be worth a premium price, right?

What if we were to tell you that you could have all this and more at no cost or obligation at all?


We will soon be launching the Pro User Program.  For qualified users this means:

  • Access to 1000’s of pages of technical guides, industry publications, case studies and more.
  • Access to live expert technical assistance
  • Prioritized quotes, orders, and case resolutions
  • Customized programs ranging from custom castings, specialized machining, and a variety of inventory services, that have saved some of our very best customer’s time and money.
  • Become an expert in bronze based products.
  • Gain the ease of mind in knowing that you are getting the best product at the most competitive price.
  • Be the first to be notified of material price decreases and cut product costs ASAP
  • Plus much more to come.



If interested, simply fill out the short form below and we will pre-qualify you so you can start experience the benefits of being a pro user as soon as it launches.

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October 3, 2016by admin0

Enduralube Graphite Plugged Bronze Bearings

National Bronze Mfg. Co. is proud to announce the addition of a new series of bearings to its Enduralube Self Lubricating Bearings line.

Enduralube bearings are known as the “world’s most reliable bronze bearing”.  They consist of a cast bronze alloy base metal, along with solid dry lubricant plugs machined and pressed throughout the contact are of the bearing.  This combination of strength and maintenance free use makes the Enduralube Bearings an ideal choice for many demanding applications



The Enduralube “A” Series bearings can be utilized where heavier than normal loads are required as well as in environments normally corrosive to bronze. They key to the load bearing and anti-corrosive properties of the “A” series is the use of an aluminum bronze alloy as the base metal.  When exposed to corrosive environments that aluminum bronze creates an aluminum oxide coating that further protects the metal.

Enduralube Graphite Plugged Bronze Bearing Applications


Technical Data

  • Tensile-90,000 psi
  • Yield- 32,000 psi
  • Max P value- 4500 psi
  • Max V value – 225 fpm
  • Temperatures range -450° f – +750° f (+1200° f Intermittent use)


For more information about the Enduralube Bearing Product Lines follow the links below:

Graphite Plugged Products

Enduralube Brochure

Wear Plates

Steel Mill Wear Parts


August 30, 2016by admin0

C36000 Brass Bar Stock


C360 free machining brass is one of the most commonly used brass alloys today.  As the name “free machining” implies, this alloy is engineered to maximize the machining capability of today’s hi speed machining equipment.  C360 brass is used in a wide variety of applications from plumbing components, valve stems, fittings, and various adapters.  The ease of machinability makes C360 free machining brass an excellent choice for higher volume production work.

C36000 Brass Extrusion Process


C360 brass is a wrought alloy, this means it is manufactured via an extrusion process.  This process involves the casting of a large billet, reheating this billet, and extruding a smaller diameter metal through a die in an extrusion press. In order for this process to work you must start with a much larger billet to produce a smaller extruded diameter.  For this reason there are certain limitations on the size of the extruded diameter.  Generally the largest extruded diameter that can be extruded is approximately 4” to 4.5”.  For a large number of the C360 brass end uses this large enough to suffice.  Unfortunately for certain uses, 4.5” isn’t large enough.

C36000 Free Machining Brass Bars

For situations where the max extruded diameter of C36000 brass isn’t large enough for the finished component, there are a couple of options to consider.

Option #1:

The easiest option would be to switch to a different cast alloy with similar properties.  Often, we see customers in this situation successfully substitute C93200 bearing bronze for the large diameter C36000 brass.  The C93200 bronze is quite easy to machine (machinability rating of 80 compared to 100 for C360 brass).  The C93200 also has natural bearing properties due to the lead content much like the C360 brass. The advantage of using C93200 bearing bronze for the larger diameter is that it is a cast alloy.  This process allows larger diameters not possible with an extruded product like C360 brass.

Cast and Turned C360 Brass Bar Stock


Option #2:

A second option for large diameter C36000 brass bar stock is what we called cast and turned C360.  This is achieved by casting C360 brass and eliminating the extrusion process. After the C360 is cast, the diameter is machined, or turned, to a specified size. This method will give you a bar stock with the same chemical composition as extruded C360 brass but with slightly different mechanical properties.  Depending on the application this may be an acceptable solution.

Here at National Bronze Mfg. Co. we can provide either of the above options.  For more information on large diameter C36000 brass bar stock, follow the links below or contact one of our experience Sales Technicians today.

C36000 Free Cutting Brass

C93200 Bearing Bronze

Contact Us

July 29, 2016by admin0

T Shaped Bronze Bar Stock Case Study


Ever need a shape of bronze bar stock that wasn’t round or flat?  If so, you know that other shapes aren’t widely available.  At National Bronze Mfg. Co. we think outside the box and outside the standard shapes.  Read this new case study that reviews a recent project involving custom T-shaped continuous cast bronze bar stock that we had specially cast specifically for our customer.  At National Bronze Mfg. Co. we combine our 105 years of expertise with exception customer service to help make our customers job even easier.  Contact us today for your next bronze based product needs.

T-Shaped Bar Stock Case Study- National Bronze Mfg. Co. 

July 19, 2016by admin0

Business In Focus June 2016

With a readership of over 363,100 business leaders throughout North America, Business in Focus Magazine takes pride in bringing their readers a comprehensive view of North American businesses, month after month. The June 2016 issue of this magazine included an article highlighting the city of Roseville Michigan.

As a successful Roseville based business, National Bronze Mfg. was highlighted in this article.  Follow the link below to read the full article:

National Bronze

May 18, 2016by Michael Russo0

Enduralube M Series

Enduralube™ self-lubricating are known as some of the most reliable bronze bearings in the market.  This reliability comes from the combination of the cast bronze base metal and the proprietary solid lubricant plugs.  This combination gives our customers a maintenance free bearing able to withstand even the most extreme environments.



The Enduralube™ “M Series” bearings utilize a Manganese bronze as the base metal.  These bearings can be used in applications that require higher than normal load bearing capabilities with a slower rate of motion.  The high strength manganese bronze provides the added strength need for these applications, and the solid lubricant plugs provided the necessary lubrication to keep the bearings moving.

Enduralube M Series


We offer both custom made bearings as well as a standard line of stocked Enduralube™ “M series” sleeve and flanged bearings.  You can find our standard line of Enduralube™ “M Series” bearings on our online store at

To request a quote for a custom Enduralube™ “M Series” Bearing, fill out our RFQ form:

Request for Quote


May 11, 2016by Michael Russo0

Square, Alloy 93200


Many times our customers find themselves with a need for a machined part that has a shape or size very different from any of the standard bar stock shapes or sizes.  This causes high amounts of machining time and scrap loss, which will ultimately drive up product costs.  Depending on the finished shape and time constraints, have a custom cast shape and/or size may be a very beneficial way to go.

cast bronze shapes bronze bar stock shapes2


While cast bronze bar stock is generally cast in tube, solid round, or flat shapes, this is due to the amount of end uses that are of similar shapes.  With cast bronze bar stock, many shapes and sizes can be cast, not just tube, round or flat stock.

Bronze Guide Block

The next time you’re faced with a project that at first seems to require excessive machining and/or scrap loss due to the difference in bar stock and finished machine size or shape, be sure to ask our Sales Technicians if a custom cast bar stock would make sense for your application.


April 26, 2016by Michael Russo0


The sunny Oceanside resort of Omni Hilton Head served as a beautiful backdrop for the Copper & Brass Service Center Association’s 65th Annual Convention. Each year delegates from some the most respected Mills and Service Centers gather for just under a week of education, networking, and growth.

National Bronze Mfg. Co. has been proudly sending delegates to the Annual CBSA Convention for the last 4 years.  This year’s convention included an informative economic forecast from Economist Alan Beauileu, a seminar on hiring and keeping the best employees from Kit Welchin, and a thought provoking session on leadership from Brigadier General Nick Halley.  In addition to the information education sessions members were able to get together and discuss industry issues and share possible solutions to common problems.

The Annual Convention would be worth the cost for the educational value alone, but CBSA doesn’t stop there.  Every evening as well as some days there are ample opportunities to network with other members.  Service Center members have the chance to meet senior management from some of the largest Red Metal Mills in the world.  These introductions can lead to growth for their company and their product lines.  Mill members get the opportunity to meet with their current customers as well as reach out to potential new ones as well.


Each year the delegates from National Bronze Mfg. Co. return from the CBSA Convention with new ideas and contacts that drive growth and innovation for the following year.

To learn more about CBSA or National Bronze Mfg. Co. metal service center products, follow the links below:

Copper & Brass Service Center Association

Bearing Bronze Alloys

Aluminum Bronze Alloys

Gear Bronze Alloys

Manganese Bronze Alloys

Phosphor Bronze Alloys

Silicon Bronze Alloys

Toughmet 3 Alloys

Free Machining Brass

Cartridge Brass

Naval Brass

ETP Copper

Chromium Copper

Beryllium Copper

Beryllium Free Copper

April 25, 2016by Michael Russo0

Bronze Guide Bushing


Base Alloy: C95400 Aluminum Bronze


Processes: Turning, Boring, Grooving




Die casting is a metal casting technology with a very similar process to injection molding.  The die casting process tends to be limited to higher volume production due to the large capital cost required.  Bronze bushings can be utilized in this type of machinery to assist various pins and shafts that must move freely to operate.


This slide guide bushings is machined from C95400 Aluminum Bronze. C95400 is an excellent higher strength bearing alloy that is still softer than most steels.  This difference in material hardness allows the bushing to act as the bearing surface.  Grooves have been machined onto the inner diameter of this part to assist in lubrication dispersal.

die casting bushings

For more information on these and other products from National Bronze Mfg., follow the links below:


C95400 Aluminum Bronze Bar Stock

Custom Machined Parts

Cast Bronze Bushings

Cast Bronze Bushings Grooves