High Precision CuSn12 Bronze Bearing

About us

CuSn12 and CuSn12Pb Bronze Bearing Alloys

CuSn12 (CC483K/CB483K) is a bronze alloy with a high tin content that offers superior mechanical properties compared to Rg7, a common bronze alloy. This alloy, by incorporating more tin and reducing the use of zinc and lead, is harder and tougher. It demonstrates good corrosion resistance, especially in marine environments. The design of each bearing is tailored to its specific application, taking into account the geometry and material selection. This customization ensures that the bearing meets all load, environmental, and temperature requirements of its intended use.

Lubricant

For optimal lubrication, the lubricant is strategically layered in the direction of sliding. The solid lubricant, which constitutes 25 to 35% of the total sliding area, is primarily graphite enhanced with additives. This arrangement ensures thorough coverage. For applications involving extreme conditions, such as sliding speeds greater than 0.5 m/s, the use of additional lubrication is advisable.

CC 483K / CUSN12
CuSn12 Tin Bronze Bearing

Leaded, Phosphor And Aluminium Bronzes Bearing，

Search Our Material Alloy

Standard Slide Plate Bronze and Mini Type Wear Plate

Long-Lasting CuSn12 Bearings, High Load Capacity, Seawater Resistant

Materials: Solid bronze bearings are crafted from CuSn12, a type of continuously cast bronze. All surfaces of these plain bearings are finely machined. A range of other alloys is also available in addition to the standard material. Common alternatives include CuAl10Ni, CuSn10, and CuSn7Zn4Pb7.

Discover our durable CuSn12 tin bronze bearings perfect for marine applications. Shop now for unbeatable strength & longevity! CuSn12Pb is a leaded tin bronze that provides excellent wear resistance, high load-bearing capacity, and corrosion resistance. The addition of lead enhances the alloy’s mechanical properties and toughness.

Applications: These alloys are frequently used to manufacture bearings, bushings, sleeves, and other components that require high load capacity and wear resistance due to their durability and corrosion resistance.

For the CuSn12 alloy, the relevant standard is DIN 1705. This German standard specifies the chemical composition and properties of CuSn12, which is a tin bronze alloy used in various industrial applications!

Solid bronze bearings, Tin Bronze Bearings, CuSn12 Material, Custom Parts Available

Get the best in corrosion resistance with our CuSn12 bronze bearings. Tailor-made options for your industrial needs. Order today!

CuSn12 is sometimes also referred to as “Gear Bronze” and meets the requirements of the DIN 1705 alloy GC-CuSn12.

CuSn12Pb may be designated as G-CuSn12Pb in DIN standards with a different DIN material number.

Companies offer CuSn12 and CuSn12Pb bronze bearing alloys as self-lubricating copper bearings.

Physical Characteristics: These bronze alloys typically possess high durability and tensile strength, suitable for bearing manufacturing in high load and harsh conditions.

EN and DIN Standards: The CuSn12 alloy is categorized as CuSn12-C in European Standards (EN) with the material number CC483K, complying with EN 1982 standards. C90700, C90800, CC483K, CuSn12, JM3, NS16508, P, PB2, SAE65.

Precision Bronze Graphite Bushings Oil-free bushing
Nonferrous Bushes oilless bearing Graphite Impregnated

CuSn12 and CuSn12Pb bronze bearing alloys

CuSn12 Bearings for Heavy Loads. Superior Wear Resistance. High-Speed Performance. Upgrade your machinery with CuSn12 bronze bearings. Designed for high speeds and heavy loads. Shop our selection now!

Other Bronze Alloys: In addition to CuSn12 and CuSn12Pb, other bronze alloys such as CuSn7Zn4Pb7 (CC493K), also known as Rg7 or gunmetal, are recognized for their good sliding and dry running properties.

This information provides an overview of the CuSn12 and CuSn12Pb bronze bearing alloys, including their physical characteristics, applications, and how they are classified and named according to international standards. For more detailed technical specifications or to purchase these materials, please contact us.

The closest international standards for the C90700 Tin Bronze are ASTM B505/B505M and SAE J461, as indicated in the search results. The C90700 alloy, also known as SAE 65, is specified under these standards, which detail its composition and mechanical properties.

Material #50SP1-SL1 (CuZn25Al6FeMn3) #50SP1-SL4 (CuZn25Al6FeMn3) #50SP5-SL1 (CuZn25Al6FeMn3) #50HP (CuZn25Al6FeMn3) #50AB-SL1 (CuAl10Ni) #50AB-SL4 (CuAl10Ni) #50B (CuSn12)
Chemical Composition
Cu (%) 65 65 65 65 80 80 88
Sn (%) – – – – – – 12
Pb (%) 25 25 25 25 – – –
Zn (%) 6 6 6 6 – – –
Ni (%) – – – – 5 5 –
Al (%) – – – – 10 10 –
Fe (%) – – – – 5 5 –
Mn (%) 4 4 4 4 – – –
Hardness (HB) >180 >180 >235 >250 >150 >150 >80
Tensile Strength (N/mm²) >550 >550 >750 >785 >200 >200 >200
Elongation (%) >12 >12 >12 >10 >10 >8 >8
Coefficient of Expansion (×10^-5/°C) 1.9 1.9 1.9 1.6 1.8 1.8 1.8
Limited Temp. (°C) 300-400 300-400 300-400 400 400 400 400
Max Load (N/mm²) 80 100 118 50 70 70 –
MAX SPEED (M/min) 15 15 10 20 10 10 10
Max PV (N/mm²*m/s) 200 200 200 200 200 200 200
Compression Set Amount (≤N/mm²) 0.01 0.01 0.05 0.04 0.05 0.05 0.05

This chart reflects the technical parameters of various materials with their chemical compositions and physical properties such as hardness, tensile strength, elongation, coefficient of expansion, limited temperature range, maximum load, speed, PV factor, and compression set amount.

Choosing the Right Self-Lubricating Bronze Bearings:

Benefits:

  • Exceptionally High Load Capacity: Suitable for demanding load conditions.
  • Self-Lubricating: Can function effectively without the need for extra lubrication.
  • Optimal for Low-Speed, High-Load Constructions: Ideal for environments where slow speeds and high loads are prevalent.
  • Adaptable to Various Movements: Works well with reciprocating, oscillating, or intermittent movements.
  • Temperature Versatility: Operates effectively across a broad temperature range.
  • Chemical Resilience: Offers robust resistance to chemicals.
  • Superior Corrosion Resistance: Excellently resists corrosion in harsh environments.

Special Features:

  • Custom Components: Includes thrust washers, plates, and bars.
  • Detailed Customization: Accommodates specific design details.
  • Variety in Lubricants: Offers several options for lubricant materials.
  • Multiple Base Materials: Provides a choice of different base materials for flexibility in application.

Typical Applications:

  • Casting Machines: Ideal for use in the casting industry.
  • Steel Rollers: Suitable for heavy-duty steel processing.
  • Metallurgic Industry: Essential in various metallurgical processes.
  • Maritime Applications: Utilized in ships and ship cranes.
  • Energy Generation: Effective in turbines within power generation sectors.

In summary, CuSn12 bronze bearings with graphite self-lubrication offer a high-performance, low-maintenance bearing solution for various industrial applications. If you require further technical support or wish to purchase these products, please contact us to customize and obtain more information.

Solid lubricants,

Self-lubricating bearings equipped with integrated graphite pellets offer the following characteristics:

  • Maintenance-Free: These bearings are self-lubricating, eliminating the need for regular maintenance.
  • Heavy Load Capability: They are designed to perform optimally in heavy load applications.

Graphite bronze bearings, available with or without a flange, are constructed from cast bronze material embedded with special solid lubricants. These bearings are designed to handle high loads, with the base metal specifically chosen for its strength. The embedded solid lubricant enables the graphite bronze bearings to operate effectively without the need for additional lubrication.

These bearings perform exceptionally well under conditions of low speeds and extreme temperatures, both high and low, without any lubrication. The lubrication reservoirs are strategically distributed across the bearing surface, ensuring that the entire surface is lubricated during movement. These reservoirs occupy approximately 25-30% of the sliding surface, providing consistent and efficient lubrication throughout the bearing’s operation.

Alloy International Code

Chinese Code
GB1776-87		 International counterparts Applications
International
ISO 1338		 Japan
Jis		 (USA)
ASTM (UNS)		 German
DIN
CuZn25AI6FeMn3 CuZn25AI6FeMn3 H5102
CAC304		 B30-92
C86300		 DIN1709
G-CuZn25A/2.0598		 High-load, low speed, general use
CuZn25AI6FeMn3 CuZn25AI6FeMn3 H3102
CAC304		 B30-92
C86300		 DIN1709
G-CuZn25A/2.0598		 Super high load, low-speed, high
duty
CuAI10Fe3 CuAI10Fe3 H5114
CAC703		 B30-92
95800		 DIN1714
GB-CuAI10NI/2.1096		 Medium load, medium-speed,
general use
CuSn5Pb5Zn5 QSn5-5-5 H5111
CAC406		 B30-92
C83600		 DIN1705
G-Cu5n5ZnPb/2.1096		 Medium load, medium-speed
DB5675-85
HT250		 Fe250 ASTM
class40		 low-load, low-speed

Solid Lubricant

Solid Lubricants and Start-up Films

The inserts are placed overlapping in the sliding direction. The lubricating film degrades over time but is replaced by the lubrication provided by the inserts. Once the bearing is fully machined, a 20-micron film-like solid lubricant insert composition can be applied. This thin film alleviates the critical start-up process (stick-slip).

Solid Lubricant Features Typical application
SSL1(PTFE etc + Add) Excellent resistance against chemical attacks
and low friction. Temp limit 400℃		 Suite for general machines and under
atmosphere
SL2(PTFE etc + Add2) Lowest in friction and good of water
lubrication, Temp.limit 300℃		 Ship, hydraulic turbine, gas turbine etc.

The CuSn12 bronze alloy, represented under various standards such as SS-EN 1982 CC483K, EN 1982 CC483K, UNS C90800, BS 1400 PB2, and DIN 1705 CuSn12, is a copper alloy primarily used for components that must endure heavy loads at low speeds. Its applications are broad, but it is particularly suited for:

  • Worm wheels: These are gear wheels that mesh with a worm to significantly reduce rotational speed and allow for higher torque transmission in compact systems.
  • Gears: CuSn12 is suitable for gears that operate under heavy loads but at slower speeds, where its properties help in reducing wear and extending the lifespan of the gear systems.
  • Bushings: These are used to reduce friction between two surfaces that move relative to each other, helping to absorb the load and reduce wear.

Key Properties of CuSn12

This copper alloy is chosen for such applications due to its excellent wear resistance, good corrosion resistance, and its ability to withstand high mechanical stresses. These properties make it ideal for heavy-duty mechanical components in industrial and engineering applications.

The various standards (Swedish, European, US, British, and German) ensure that the material’s specifications and quality are consistent and meet the required performance criteria across different regions and industries. These standards are often used interchangeably depending on the geographic location or specific industry standards.

The CuSn12 bronze bushings are specified under several national standards, each having nearest equivalents or similar designations that ensure compliance with specific material properties across different countries. Here’s a breakdown of these standards and their nearest equivalents:

Swedish Standard

  • SS-EN 1982 CC483K
  • Nearest Equivalents: GS CC483K, GC/GZ CC483K

European Standard

  • EN 1982 CC483K
  • Nearest Equivalents: GS CC483K, GC/GZ CC483K

US Standard

  • UNS C90800
  • Nearest Equivalent: C 90800 (essentially the same designation repeated for emphasis)

British Standard (old)

  • BS 1400 PB2
  • Nearest Equivalent: 1400 PB2 (similar to the US standard, this is a repeat of the same designation)

German Standard (old)

  • DIN 1705, G-CuSn12
  • Nearest Equivalents: GZ/GC-CuSn12

These equivalents indicate variations within the same material specification that might denote slight differences in the manufacturing process or mechanical properties (like grain structure). The “GS,” “GC,” and “GZ” suffixes often represent different casting methods or product forms, such as sand cast (GS), continuous cast (GC), or centrifugally cast (GZ). This helps engineers and manufacturers select the right type of CuSn12 bronze for their specific applications while ensuring compatibility and meeting regulatory standards.

4

Self-lubricating bearings with embedded solid lubricants, such as graphite, are a critical component in many mechanical systems where maintenance and lubrication are challenging. These bearings are designed to release lubricant as they wear, providing a consistently low friction surface. The choice of base material for these bearings significantly affects their load carrying capacity, making the selection process crucial for optimal performance and durability. Here’s an overview of the four copper-based alloys you mentioned, which are used as base materials in graphite bronze bearings:

1. CuSn5Pb5Zn5

  • Composition: This alloy consists of copper, 5% tin, 5% lead, and 5% zinc.
  • Properties: It offers good corrosion resistance and moderate strength. The presence of lead and zinc provides improved machinability and wear resistance.
  • Applications: Suitable for moderate load applications where some corrosion resistance is required.

2. CuSn12

  • Composition: This alloy is made up of copper with 12% tin.
  • Properties: It has excellent wear resistance and good corrosion resistance, making it suitable for high-load applications.
  • Applications: Ideal for heavy-load bearings used in slow to moderate speed applications, such as worm wheels and bushings.

3. CuSn10Pb10

  • Composition: This alloy contains copper, 10% tin, and 10% lead.
  • Properties: The high lead content enhances its machinability and embeddability, which helps in accommodating foreign particles and reducing friction.
  • Applications: Excellent for bearings under medium to high loads and where the embedding of dirt particles and debris is possible.

4. CuNi4Al10Fe4

  • Composition: Comprising copper, 4% nickel, 10% aluminum, and 4% iron.
  • Properties: This is a high-strength, corrosion-resistant alloy, with the added nickel and aluminum providing increased toughness and resistance to wear and fatigue.
  • Applications: Suitable for high-load, high-speed applications, and where excellent wear resistance is crucial, such as in aerospace and marine environments.

Selection Considerations

The selection of the right alloy for self-lubricating bearings depends primarily on:

  • Load Carrying Capacity: Higher tin, lead, or specific additives like nickel and aluminum can enhance the bearing’s ability to support heavier loads.
  • Speed of Operation: Alloys with better wear resistance are preferable for higher speeds to minimize wear and friction.
  • Environment: Corrosion resistance is critical in harsh environments, making certain alloys more suitable than others.
  • Compliance and Availability: Some applications may have restrictions on materials like lead, influencing the choice of alloy.

Each of these materials has unique properties that make them suitable for specific applications within various industries. The choice should align with the operational requirements and environmental conditions of the bearing’s application.

The hardness of bearing materials is a crucial factor in their performance, particularly in terms of wear resistance, load-carrying capacity, and their interaction with mating materials. Here’s a brief overview of the materials you mentioned, along with their typical hardness values:

1. Gun Metal

  • Hardness: Greater than 165 HB (Brinell Hardness)
  • Composition: Typically a type of bronze – usually a mix of copper, tin, and zinc.
  • Properties: Gun metal is known for its good sliding properties, corrosion resistance, and ability to conform to irregularities.
  • Applications: Used in steam and hydraulic castings, valves, gears, and bearings where moderate loads and speeds are anticipated.

2. Tin Bronze

  • Hardness: Greater than 210 HB
  • Composition: Primarily copper with a significant amount of tin (around 12% is common).
  • Properties: Offers excellent resistance to corrosion, high wear resistance, and low friction coefficient. Tin bronzes are stronger than most other bronzes, making them suitable for heavy loads.
  • Applications: Commonly used in high-load bearings, heavy-duty gears, and marine applications.

3. Lead-Tin Bronze

  • Hardness: Greater than 180 HB
  • Composition: This alloy combines copper with significant percentages of lead and tin, enhancing its machinability and wear properties.
  • Properties: The presence of lead in the alloy allows for excellent machinability and also helps in embedding small impurities that might otherwise cause damage to the shaft.
  • Applications: Ideal for use in applications where there are intermittent loads and where the bearing must accommodate impurities.

4. Ni-Al Bronze

  • Hardness: Greater than 270 HB
  • Composition: Alloy of copper with nickel, aluminum, and iron.
  • Properties: This is a high-strength alloy, with excellent resistance to wear, corrosion, and fatigue. The nickel and aluminum in the composition not only increase the hardness but also improve the overall toughness of the material.
  • Applications: Used in high-load applications such as aircraft, marine hardware, and under-the-hood automotive components, where high strength and resistance to shock and wear are necessary.

Considerations for Matching Bearing and Mating Materials

  • Compatibility: The hardness of the bearing material should be compatible with that of the mating shaft material to prevent excessive wear or galling. Typically, the shaft material should be slightly harder than the bearing material.
  • Wear and Fatigue: Harder materials generally offer better resistance to surface wear and can handle higher loads. However, they are also less tolerant to misalignment and contamination.
  • Operating Conditions: Environmental factors like temperature, humidity, and exposure to corrosive elements should also be considered when selecting bearing materials.

The selection of the right bearing material will depend not only on its hardness but also on the specific operational and environmental conditions expected in its application.

Insert Graphite cuSn12 Bronze Bushing: Self Lubricating Bronze Bearings, Slide Bearing

Experience the Strength of Self-lubricating Bearings

CuSn12 Bronze Bearings graphite, Precision CuSn12 Bronze Bushings, Hard & Tough Alloy, Regular Lubrication

CuSn12 Bronze Bearings: These bearings are made from CuSn12 tin bronze, a high-quality bearing designed for durability and self-lubrication. CuSn12 is a tin bronze alloy known for its high load-bearing capacity and good wear resistance. Bearings with or without flange are made of casted bronze material with special solid lubricant embedded.

Product Advantages: Graphite-infused bronze bearings offer a self-lubricating solution that ensures continuous and frictionless motion, reducing frequent downtime and maintenance costs.

Ensure smooth operation with our CuSn12 bushings. Perfect for demanding applications. Available in all sizes. Buy now!

If you’re looking to source these alloys or need further information on their properties, applications, or availability, it would be helpful to contact us. We specializes in bronze alloys. We will provide detailed specifications, discuss pricing, and ensure that the material meets your specific requirements.

bronze bushings plugged graphite CC 483K / CUSN12: CC333G / CUAL10FE5NI5: CC 493K / RG7:
Graphite Plugs plate c93200 bronze self-lubricating plates bronze with graphite to the dimensions of drawings Graphite Bearings aluminum bronze CuAl10Fe5Ni5 CW307G / CUAL10NI5FE4:

Self-Lubricating Features:, Self-Lubricating Bronze Bearings, For high load and low speed

Self-Lubricating Features: CuSn12 bronze bearings achieve self-lubrication by incorporating graphite into the bearing material. Graphite is an excellent lubricant that can reduce friction and wear in the absence of traditional lubricants.

Product Forms: Self-lubricating bronze bearings are available in various forms, including bronze sleeves with embedded graphite and oil-impregnated bronze bearings.

Technical Specifications: The technical data for self-lubricating bronze bearings includes parameters such as static maximum load, hardness, and surface roughness.

Graphite+add Three types of solid lubricants are offered, with two based on graphite and one on PTFE. These lubricants are formed through a compression process, resulting in plugs that are highly dense and possess excellent lubrication properties.

CuSn12, cuSn12Pb alloy and graphite bronze bearings Industry, CuSn12 With Graphite, Maintenance-Free Operation

Applications: Due to their self-lubricating characteristics, these bearings are suitable for situations where standard lubrication is impractical, including high-load, high-temperature environments, or in applications that are difficult to maintain. Corrosion & Seawater Proof. High Wear Resistance. Opt for CuSn12 bronze bearings for your marine equipment. Reliability in harsh conditions. Inquire for a quote!

Tolerances:

  • Housing: Specified at H7 tolerance.
  • Cylindrical Bearing: As per the drawing or standard, the interior is at F7 tolerance and the exterior at m6 tolerance (push fit).
  • Flanged Bearing: In accordance with the drawing or standard, features interior tolerance E7 and exterior tolerance r6.
  • Shaft: Recommended tolerances include d8, e7, or f7.

Lubrication:

  • The graphite bearings are designed to operate without additional lubrication; however, their performance can be enhanced with supplementary lubrication.
self lubricating brass oil groove bushing C83600 Grooved and Flanged Flange OD CuZn25Al5 + graphite

NAAMS Standard

aluminium bronze density grade Graphite Insert Type oilless bearings bushes

C92610

Large Diameter Bronze Bearings phosphor bronze alloy bushing

phosphor bronze bushing

Large Diameter Bronze Bearings phosphor bronze alloy bushing

phosphor bronze alloy bushing

oilless bushing

How Much Grease Do Bronze Bearings Really Need?

oilless standard bushings

What are the common problems of oil-free bearing?

oilless bushing

How to install oil-free bearings?

oilless bronze bushings

Self-lubricating oilless bushes

oilless bushing

Oilless Flat Plate

lagerbuchse, graphite bushing

self-lubricating slide bearings size

Experience the ease of self-lubricating CuSn12 bearings. Ideal for difficult-to-maintain areas. Click to learn more!

CuSn12 Bronze – The Marine Choice

Your Source for Heavy-Duty Self-lubricating Bearings