Wrapped phosphor tin bronze plain bearings, constructed from CuSn8/CW453K or CuSn6/CW452K alloy, offer exceptional self-lubricating properties and are designed as cylindrical oilless bushings. These bushings are engineered to provide smooth, reliable, and maintenance-free operation in a variety of applications.

The CuSn8/CW453K and CuSn6/CW452K alloys used in these bushings possess high strength, ductility, and corrosion resistance. Their self-lubricating properties eliminate the need for external lubricants, reducing friction, wear, and downtime.

The wrapped design of these plain bearings provides additional durability and stability, while the cylindrical shape ensures precise fit and alignment. These oilless bushings are ideal for use in high-load, low-speed applications where traditional bearings may fail due to insufficient lubrication or high wear rates.

Wrapped phosphor tin bronze CuSn8/CW453K & CuSn6/CW452K self-lubricating plain bearings, cylindrical oilless bushings, offer a cost-effective and reliable solution for applications requiring precision alignment, smooth operation, and long-term durability.

Self Lubricating Plain Bearing, Bronze Bushing | Metric Size

Wrapped bronze bushing is made of tin-bronze CuSn8P

Wide range of wrapped bronze bushing ready in stock. Able to satisfy any request and design need. Download the full Catalog to discover the technical features of wrapped bronze bushings. Products always in stock.

Wrapped bronze bushings

Viiplus is always focusing on the overseas markets, by satisfying the ever-increasing demands of modernization of customers. We could provide products according to the international standards, and could also provide as per the customers' requests. With stable product quality and best level of services, our products have been exported to dozens of countries and regions from the Europe, the United States, and Southeast Asia, etc.

Wrapped bronze bushings,similar PRM BuSHING &PRMF Flanged Bearings. Excellent in dirty environments due to lubrication pockets, which initially need to be filled with grease;available in metric sizes as straight or flanged bushings.

Bushings Metric (mm)Imperial (inch) Size

Phosphor tin bronze sliding bearing sleeve bronze with oil holes bushing.Phosphor bronze is characterized as a very pure alloy with extremely low content of impurities. Phosphor blends well with copper making the material hardly reacting on oxygen (oxidation).Phosphor tin bronze bushing is an alloy bearing and bushings with high wear resistance and good mechanical properties. There are Flange drawing of standard size inside diameter and outside diameter height different size and wall thicknesses available in phosphor tin bronze sliding bearings.

Chemical composition (standard Bronze Bushings for CuSn8/CW453K)

– Cu Rest
– Sn 7.5-8.5%
– P 0.01-0.04%

Chemical composition (standard Bronze Bearings for CuSn6/CW452K)

– Cu Rest
– Sn 5.5-7.0%
– P 0.01-0.04%

Shapes & forms Bushings ,Flange Bushes.Washer,sliding plates,strips,material.

Mechanical properties (Cu Sn8/CW453K)
Yield strength (Rp N/mm²): >300 N/mm²
Tensile strength (Rm N/mm²): 450-540 N/mm²
Elongation in % A 5: 20-30%
Hardness/Brinell:120-170 HB
(All values = Nominal values)
Density ∼ 8.9
Mating material: Min. surface hardness 300 HB. Rec. surface roughness < 1 Ra

Mechanical properties (Cu Sn6/CW452K)
Yield strength (Rp N/mm²):
Tensile strength (Rm N/mm²):
Elongation in % A 5: 20-30%
Hardness/Brinell (H160): 160-190 HB
Hardness/Brinell(H180):180-210HB
(All values = Nominal values)
Density ∼ 8.9
Mating material: Min. surface hardness 300 HB. Rec. surface roughness < 1 Ra

Characteristics
The material is suitable for welding, soldering and brazing.
The material is also suitable for bonding.

Wrapped bronze bushings are made entirely from phosphor bronze CuSn8. Wrapped Bronze Bearing 090 bronze wrapped bearings Cylindrical Oilless Bushing Sleeve Bushes manufacturer

Bronze bushing is a kind of wrapped self lubricating bearing.VIIPLUS Series bronze bearing is a kind of bushing wrapped by bronze strip. This type of bronze bearing is made of particular formulation with high specific gravity and its surface can be incorporated with spherical or diamond shaped indentations or oil grooves based on customers’ requirements. It is high load capacity and long life. Compared with traditional cast bronze bushing, it is more cheap and more compact. Series wrapped bronze bushing is widely used in hoisting machines, construction machines, automobiles, trucks, machine tools, mineral equipment and etc.

CuSn8P or CuSn6P tin bronze bearing is an economical bearing with high bearing capacity and good wear resistance.The working surface of the product is covered with regular rhomboid oil holes, which play the role of oil storage and can easily form oil film during initial movement so as to reduce initial friction factors.Mainly used in agricultural machinery, construction machinery and other high-load low-speed occasions

Bronze Bearings made of CuSn8 with Lubrication Indents

Bronze Wrapped Bearing with Oil Pockets(090 CYLINDRICAL BUSHES)

The bearings are wrapped from a cold formed homogenous bronze (CuSn8) with exceptional material properties. The standard sizes are fitted with diamond shaped lubrication indents in the bearing surface. These indents serve as lubricant reservoirs to rapidly build up a lubrication film at the start of movement and thereafter reduce the running friction. The material is suitable for construction and agricultural machinery applications.

Structure And Composition

Bronze Bearings and Bronze Sleeve Bushings made of CuSn8 with Lubrication Indents

Max.Load	Static	120N/mm²	Elongation	40%
	Dynamic	40N/mm²
			Temp	-100℃~+200℃
			Coefficient of friction	0.08~0.25
Max.speed(Lubrication)	Max.Speed	2m/s	Thermal conductivity	58W(m*k)-1
Max.PV	Max.PV	2.8N/mm²*m/s	Coef. of thermal expansion	18.5*10-6K-1
Tensile strength	Tensile strength	450N/mm²
Hardness	Hardness	HB 100-150

Product NO.	Chemical Compositions
VSB-22	Cu	Sn	P
	91.3	8.3	0.2

Availability

Bearing forms available in standard dimensions
· Cylindrical bushes
Bearing forms made to order: cylindrical bushes with non-standard dimensions, flanged bushes, sliding plates, customized bearing designs

This type of bushing is widely applied in hoisting machines and other construction machines, automobiles, tractors, trucks, machines tools and some mineral engines. It can be fabricated into bushes, half bearings, flanged bushes, taist washers, spherical bearing andsoon.

Recommended fits

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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