C90800 Bush CuSn12 Tin Bronze Graphite Plugged Bushing

C90800 Tin Bronze CNC Machined Flanged Shaft Turned Bushing Brass Bearing

✅ Clarified Breakdown in English:

1. Tin Bronze Bushing

• Refers to a sliding bearing (bushing) made of tin bronze alloy

• Tin bronze is commonly used in high-load and wear-resistant applications

• Well-known for its good corrosion resistance, wear resistance, and self-lubricating properties

2. C90800

• A UNS alloy designation under ASTM B505 standard

• Typical chemical composition:

  • Copper (Cu): ~88%

  • Tin (Sn): 10–12%

  • Minor amounts of Zinc (Zn) and other trace elements

• Material features:

  • High strength, excellent corrosion resistance

  • Suitable for medium-load, medium-speed applications

  • Often used in bushings, gears, wear plates, and sliders

3. CNC Machined

• The part is manufactured using CNC (Computer Numerical Control) machining

• Ensures high precision, smooth surface finish, and tight dimensional tolerances

4. Flanged Shaft

• Refers to a shaft or bushing with an integrated flange

• The flange helps in:

  • Limiting axial movement

  • Simplifying installation and positioning

• In this context, it's likely a flanged bushing that fits on a shaft

5. Turned Bushing

• The bushing is produced using turning processes (usually on a lathe)

• Results in a high-quality cylindrical surface and accurate dimensions

6. Brass Bearing

• Sometimes used interchangeably with bronze, but technically:

  • Brass is a copper-zinc alloy

  • Tin bronze (C90800) is a copper-tin alloy

Tin Bronze Graphite Plugged Bushings C90800 CuSn12 are high-performance bearing components that offer exceptional wear resistance and lubrication properties. These bushings are made from tin bronze alloy C90800, also known as CuSn12, which combines the strength and corrosion resistance of bronze with the lubricating benefits of graphite.

The graphite plugs within the bushings provide additional lubrication, reducing friction and enhancing the overall performance of the bearing. This design ensures smooth and reliable operation, even under high loads and speeds.

Tin Bronze Graphite Plugged Bushings C90800 CuSn12 are suitable for a wide range of industrial applications, including valves, pumps, and other machinery where high-performance bearings are required. Their durability and reliability make them a cost-effective solution for reducing maintenance and extending the service life of equipment.

C90800 Bush CuSn12 Tin Bronze Graphite Plugged Bushing

Material: CuSn12 Bronze with graphite

Material: CuSn12 Bronze with graphite

SELF-LUBRICATING METRIC BRONZE BEARINGS FABRICATED.128.60/128.64 mm ID x 137.54/137.58 mm OD x 168 mm Long size

• Graphite Bronze Bearings|Straight, Flanged, Washers, Guide Pin, Guide Ejector, Guide Post, Spherical-Imperial line bushings (dimensions in inches)

sleeve bearing Graphite self-lubricating bearing.pdf

Graphite Bronze Split Bush

Truck Bushings oilless bushing,oil-free bronze bush bearing

- Copper Alloy Straight, Standard / Thin Wall, I.D. F7 O.D. m6

Product Description

Graphite bronze bearings are a substrate of carbon steel, bronze powder, , fiber and other materials through a special process to produce self-lubricating products, with the characteristics of environmental protection

The solid inlaid bearing is on a brass matrix.A high performance solid lubricant inlaid with graphite or MoS2 solid lubricant.It breaks through the limitation that the general Graphite Bronze Bearings depends on oil film lubrication.In the process of use, the friction heat makes solid lubrication and shaft friction, forming an excellent condition for oil and powder to coexist lubrication, which not only protects shaft from wear, but also makes solid lubrication characteristics eternal.Its hardness is twice as high as that of ordinary copper sheath, and its wear resistance is also twice as high.At present, the Graphite Bronze Bearings product has been used in metallurgy continuous casting machine, train support, steel rolling equipment, mining machinery, ships, gas turbines and other high temperature, high load, low speed heavy load and other occasions.

oilles bearing model

Graphite Bronze Bearings | High Quality, Factory Price‎

Body Lifts and Bushing at Wholesale Prices

Graphite Bronze Bearings Material

-Bronze with solid lubricant, oilless lubricating

Self Lubricated Graphite Bronze Bearings Features

·Self Lubricated Bearings to 450°​​​

·Self Lubricating
·Performs well in High load, low speed operations
·Resists corrosive and and hostile environments.
·Excellent performance in medium to high temperature (up to 600°).
·Comparable with most viscous lubricants, oils, and grease applications.

Replacement 500 SPB BRONZE BEARINGS　SERIES BRONZE BUSHING plugged graphite size sheet:

Description

Graphite Bronze Bearing-Imperial line bushings (dimensions in inches)

Graphite Bronze Bearing are metal backed with bronze alloy graphite oil-less bushings.

These are multi-layer composite bearings made of a special sintered material used as sliding surfaces and a steel material as a support metal. The sintered layers are made of a special copper-nickel alloy containing a uniformly dispersed solid lubricant, the main component of which is graphite. Solid lubricants will be released to the surface of the ring as they wear, which will ensure a lower coefficient of friction during operation. In addition, these sintered layers were treated by the oil impregnation treatment.

Features

1．no oil supply device, oil hole, oil groove
The cost of the fuel supply system, the cost of processing, assembling, and so on, can greatly reduce the cost of manufacturing.

2．Operation cost reduction
Greatly reduce the use of lubricating oil and equipment maintenance costs, but also exempt from the risk caused by the shortage of oil.

3．design time shortened
No oil can make the design, structure is greatly simplified, reduce costs, save design time. In addition, using self-lubricating bearings can also improve the mechanical properties and prolong get remarkable results using life and improve the reliability.

4．recovery and environmental protection of lubricant
No need to waste oil recycling, is conducive to environmental protection.

Use notes

1．In the possible case, the design uses the standard specification as far as possible;

2．Please note that there is no foreign body in the assembly;

3．After using the sliding surface, formed by solid lubricant oil film in surface with black or gray black phenomenon, please do not scrub, as usual.

4．Before the assembly, if the lubricating oil applied to the grinding parts, can shorten the running in period, conducive to the operation of machinery, operation;

5．When the assembly should be slowly pressed into, it is strictly forbidden to beat, so as to avoid damage to the Graphite Bronze Bearings and deformation;

6．Design, different parts should be selected with appropriate material, in order to improve the mechanical performance, to extend the service life of the Graphite Bronze Bearings;

7．In the high load, reciprocating motion, the proposed use of screw fixation;

8．In fresh water, sea water and in the sea, on the use of stainless steel or surface plating.

Characteristic

1. Flexible, simple, convenient design with wide applications

2. FunctionaI in absence of oiI

3. Cost efficiency

4. Excellent performance under high load and low speed circumstances

5. In circumstances where it is difficult to generate hi-films, such as reciprocating movements, rotating movements and frequent on-off, Graphite Bronze Bearings highlights its excellent abrasion resistance.

6. Excellent chemical resistance and corrosion resistance

Specifications

Application field

·Hardware

·steel manufacturing

·stamping die

·automobile industry tools

·Stamping

·others

Graphite Bronze Bearings is widely used in high load applications where lower friction and good wear resistance are required and where lubrication is difficult. Some examples include wear plates for automobiles, industrial robots, wear plates for injection, injection bolt bushings and self-lubricating bushings for construction equipment.

Bearing Type

·Guide bushing

·fixture

·half bearing bush

·Wear plate

·gasket

·guide plate

·Others

Custom Design

All kinds of sliding elements can be supplied or produced on request.

Please contact us for more information.

Beyond Grease: A Deep Dive into Oilless Bushings & Why Viiplus Leads the Way

Friction is the enemy of efficiency. In countless machines, from massive industrial equipment to intricate automotive components, the constant battle against wear and tear dictates performance, longevity, and maintenance costs. Traditionally, grease and oil have been the go-to solutions, but they come with their own set of challenges: frequent re-lubrication, potential contamination, environmental concerns, and limitations in extreme conditions.

Enter the world of oilless bushings, also known as self-lubricating bearings or sliding bearings. These innovative components offer a smarter way to manage friction, delivering reliable movement without the need for external lubrication.

At Viiplus (www.viiplus.com), we don't just supply these components; we engineer solutions. Leveraging deep expertise in metallurgy and tribology (the science of friction, wear, and lubrication), we've become a leading name in sliding bearing technology. But what exactly are oilless bushings, and why should they be on your radar? Let's dive deeper.

What Exactly Are Oilless Bushings? The Science of Self-Lubrication

Unlike traditional ball or roller bearings that rely on rolling elements and require constant lubrication films, oilless bushings operate on the principle of sliding motion. Their "magic" lies in their material composition and structure, designed to provide their own lubrication at the bearing surface. This can be achieved through several key technologies:

1. Solid Lubricants Embedded: Materials like graphite, MoS₂, or PTFE are embedded directly into the metallic matrix (often bronze) of the bushing. As the shaft rotates or slides, a minuscule amount of this solid lubricant is transferred to the mating surface, creating a low-friction film.

2. Porous Metal Structures: Sintered bronze or iron materials are created with microscopic pores. These pores are vacuum-impregnated with oil during manufacturing. In operation, slight heating causes the oil to expand and seep onto the bearing surface, providing lubrication. When it cools, the capillary action draws the oil back in, creating a closed-loop system.

3. Layered Composites: These often feature a strong backing (like steel), an intermediate sintered layer (like bronze), and a low-friction overlay (often PTFE-based). The PTFE layer provides the primary sliding surface, offering extremely low friction.

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Contrasting Logic: Oilless vs. Traditionally Lubricated Bearings

The Tangible Benefits: Why Make the Switch?

Choosing oilless bushings isn't just about eliminating grease guns. It's about unlocking significant operational advantages:

• Drastically Reduced Maintenance: This is the most obvious benefit. No re-greasing means less labor, less scheduled downtime, and simplified maintenance protocols. Imagine the savings across a factory floor!

• Enhanced Reliability: Lubricant starvation is a major cause of bearing failure. Self-lubricating bearings ensure consistent lubrication, leading to predictable performance and longer service life, especially in hard-to-reach locations.

• Superior Performance in Harsh Conditions: Oilless bushings excel where traditional lubricants fail:

  • High Temperatures: Certain types can operate at temperatures far exceeding the limits of conventional greases.

  • Low Temperatures: No grease means no stiffening or freezing issues.

  • Contaminated Environments: The absence of sticky grease reduces the ingress of dirt, dust, and debris.

  • Vacuum or Underwater: Ideal for applications where liquid lubricants are impractical or impossible.

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• Cost Savings (Total Cost of Ownership): While the initial purchase price might sometimes be higher, the TCO is often significantly lower due to savings on lubricants, labor, downtime, and potential component failure replacement.

• Environmental Friendliness: Eliminating oil and grease leakage prevents contamination of products, machinery, and the environment. Crucial for industries like food processing, pharmaceuticals, and textiles.

• Compact & Simplified Designs: Without the need for lubrication systems (nipples, lines, reservoirs), machine designs can be more compact and streamlined.

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Exploring Viiplus's Portfolio: Finding Your Solution

Viiplus offers a comprehensive range of self-lubricating bearings designed to meet diverse application needs. Understanding the different series helps in selection:

• JDB Series (Graphite Plugged Bronze): Excellent for high-load, low-speed applications, intermittent motion, and high temperatures. The graphite plugs provide continuous solid lubrication. Ideal for heavy machinery, molds, and hydraulic components.

• SF Series (PTFE-Based Composite): Typically metal-backed (SF-1: steel, SF-2: steel/bronze) with a PTFE-based lining. Offers very low friction, good wear resistance, and suitability for dry running or marginal lubrication. Common in automotive, office equipment, and hydraulics.

• JF Series (Bimetal Bushings): Combines a steel backing with a sintered bronze or lead-bronze lining. Good load capacity and fatigue strength. Often used with grease or oil but can operate marginally lubricated. Found in engines, chassis parts, and agricultural machinery.

• FB Series (Wrapped Bronze): Often made from bronze strip, sometimes with lubrication pockets or through-holes. A cost-effective solution for medium loads and speeds, typically requiring initial greasing but offering extended re-lubrication intervals.

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Quick Comparison Chart (General Guide):

(Note: This is a simplified guide. Always consult specific product data sheets or Viiplus experts for precise application requirements.)

Uncertain which material or type suits your project? Our Bushing Material Selection Guide is designed to help, or Contact Us for a Free Quote and Expert Advice.

Why Partner with Viiplus? Expertise Meets Quality

Choosing the right supplier is as critical as choosing the right bushing. Here’s why companies worldwide trust Viiplus:

• Deep Expertise: Our foundation in metallurgy and tribology, coupled with a talented R&D team, means we understand the science behind reliable movement. We don't just sell; we solve friction challenges.

• Uncompromising Quality: We employ advanced manufacturing techniques (including sand casting, centrifugal casting, metal casting, investment casting) and a rigorous quality management system, ensuring every bushing meets the highest standards.

• Comprehensive Range: From standard metric sizes in JDB, SF, JF, and FB series to custom solutions including cylindrical, flange, double flange bushings, wear plates, and guide rails – we have the portfolio to match your needs.

• Global Reach, Seamless Logistics: Based in China, we ship sliding bearings worldwide. Our professional team handles customs clearance efficiently, ensuring smooth, timely delivery with all necessary documentation.

• Customer-Centric Approach: We believe in ethical practices and building trust. We offer flexible production (single units to large series), competitive pricing, and  online support.

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