Metric-sized cylindrical bearings, specifically those composed of steel, bronze, and (Polytetrafluoroethylene) split bushings, offer a robust and self-lubricating solution for a wide range of industrial applications. These bearings are designed to provide smooth and reliable rotation with minimal friction and wear.

The steel component of the bearing ensures strength and durability, while the bronze material adds corrosion resistance and improves load-bearing capacity. The split bushings contribute to the bearing's self-lubricating properties, eliminating the need for regular lubrication and reducing maintenance requirements.

The metric sizing of these cylindrical bearings ensures compatibility with a variety of machinery and equipment, allowing for seamless integration into existing systems. The split bushing design also makes installation and replacement a straightforward process, further reducing downtime and operational costs.

Wh you're upgrading old machinery or installing new equipment, metric-sized cylindrical bearings with steel, bronze, and split bushings are an excellent choice for enhancing operational efficiency and reducing maintenance burdens. Contact us today to learn more about these innovative bearings and how they can benefit your industrial operations.

bushings are suitable for dry running, low coefficient of friction, lower wear, good sliding characteristics, forming a transfer film that can protect the mating metal surface, suitable for rotary and oscillating movement.

Flanged Bush Gap Bearings​, Bushing Manufacturers

China Bushings - Manufacturers & Suppliers

High Quality Bushings with Competitive Price.

We manufacture bushings to meet your exact specifications.

Polymer Plain Bearings - High load capacity, maintenance-free

VIIPLUS specialized in research and development, production and sale of self-lubricating bearings. The main products are metallic polymer composite bearings, bimetallic composite bearings, bronze coated bearings, self-lubricating monometallic bearings and other bearings.

polymer plain bearings are ideal for applications with high loads and moderate speeds. The special thing about these plain bearings is that they are maintenance-free.

For polymer plain bearings, an important prerequisite is that they function reliably for a long period of time and do not fail even in conditions of low lubrication or dry running conditions.

Metal-Polymer Composite Self-lubricating Bushing Material

Steel Back + Porous Bronze Sinter + + Lead

• self-lubricating bushings offer very good wear and low friction performance over a wide range of loads, speeds and temperatures in dry running conditions
• Bushing material suitable for lubricated applications

Steel/ sintered bronze and steel

METAL-POLYMER BRONZE BACKED PLAIN BEARINGS

Microsection

Metal-Polymer Composite Self-lubricating Bushing Material

• Sliding layer++Lead
• Porous Bronze Sinter
• Bronze Backing

Operating Performance

Availability

• Bearing forms available in standard dimensions: Cylindrical bushes, flanged bushes, sliding plates
• Bearing forms made to order: Standard forms in special dimensions, thrust washers, flanged thrust washers, halfbearings, special shapes obtained by stamping or deep drawing, customized bearing designs

Applications

• Industrial – Aerospace, agricultural equipment, construction equipment, material handling equipment, forming machines - metal, plastic and rubber; office equipment, medical and scientific equipment, packaging equipment, pneumatic and hydraulic cylinders, pumps and motors, railroad and tramways, textile machinery, valves, etc.
• Others – Marine and offshore equipment, other applications in water or in outdoor environments

Metal-Polymer Anti-Friction Plain Bearings Assembly Dimensions and Tolerances according to ISO 3547 Specifications: Cylindrical Bushes Bushes are prefinished in the bore, It is essential that the correct running clearance is used and that both the diameter of the shaft and the bore of the housing are finished to the limits given in the tables. Under dry running conditions any increase in the clearances given will result in a proportional reduction in performance.

MADE TO ORDER

Metric bearings and imperial bushings made to order: standard bushing forms in special dimensions, gasket, special shapes obtained by stamping or deep drawing, customized bushing designs.

Metric Sized Journal Bearings Shaft Guide Bearings made to order from china—Coiled Bronze Backing Bushings Self-lubricating bearings.Tin-plated steel bronze/, lead-free; DIN1494 / ISO3547.http://bronzegleitlager.com,the leading suppliers of plain bearings in China, the products range includes steel, bronze, stainless steel or bimetallic plain bearings as well as C86300,C93200 Bornze Bushings, CNC, custom sleeve.

Maintenance-Free, Metal-Polymer Tribological Solutions For High-Demand Environments
Metal-Polymer Self-Lubricati

ng Bearing Solutions

GET A QOUTE!

PRODUCT DESCRIPTION

Self lubricating plain bearings with sliding layer.

Characteristics

• – Maintenance-free (self-lubricating)
• – Low coefficient of friction
• – Universal bearing
• – Long lifespan

Areas of use e.g.

Packaging machinery, motors, turbines, pumps, forklifts etc.

Shapes & forms

Plain cylindrical bearings, flanged bearings, thrustwashers, sliding plates.

Special manufacturing

Upon request, we can offer inch-sizes, special lengths, sliding bearings. to drawing and various -layers for different areas of use as well as different backings in steel ,bronze or stainless steel etc.

Also available

with lead free , with a variety of -mixes specialized for various industries

Split Composite dry sliding bearing;Tin-plated steel/copper /, lead-free;DIN1494 / ISO3547;Free maintenance;Excellent sliding and abrasion performance, suitable for various types of movement, high bearing capacity, strong all-round adaptability.

The metal polymer plain bearing structure is fully homogeneous so all the properties – abrasion , resistance , self-lubrication, low coefficient of friction , resistance to vibration and shock loading – are consistent throughout the entire bearing bushing wall thickness.

VIIPLUS supplies Self-lubricating bearings and provide customer with bearing system designs that meet or exceed their specification.

Metal Backed Bearings

Sleeve bushing and bearings can be produced into a metallic housing. Use of a self-lubricating lining in a metallic housing produces a stiffer bearing that requires significantly less running clearance than other non-metallic bearings. Originally developed to meet the needs of the nuclear power industry, this design is now specified in many other applications.

Metric Journal bearings, split seam bronze backing, works excellent in any pivot or linkage application. For construction and farm equipment, this product is typically used in kingpins, rock shafts, differentials, hinges, pedals and many other pivot points.

Technische Daten

• Wrapped composite dry sliding bearing
• Bronze /
• Maintentance-free

Properties

• Excellent sliding and wear behaviour, for all types of movement, high load capacity, good corrosion resistance, non-magnetic

Materials

• Support Material Bronze or steel
• Intermediate layer Sintered bronze
• Sliding layer

Material Properties

• Specific load capacity static≤ 200 [N/mm2]
• Specific load capacity dynamic≤ 140 [N/mm2] at slow sliding speed
• Sliding speed≤ 2.5 [m/s]
• Friction value ***0.02 [µ] to 0.25 [µ]
• Temperature strain– 200 [°C] to + 280 [°C]
• Max. PV-value1.8 [N/mm² x m/s]

Tolerance Details

• Housing ØH7
• Bushing inner-Ø after mountingH9
• Shaft tolerancef7 to h8

Maintenance

• is a dry sliding bearing with a sliding layer. Lubrication is therefore not necessary, but basically possible!

Range Of Application

• Machine and plant construction, textile processing and agricultural maschines, automotive industry

Caption

Special dimensions are only available on request.*If you like to use lubrication nonetheless, please remember to lubricate the sliding bearing regularly

Get in touch ...Send us an online enquiry,You can use our “Enquiry Form” to get in touch with us. One of our sales team will contact you immediately.

Disclaimer :
Information and photographs in this catalogue are an overview of OEM range bushing bearings products. For more / exact details please refer to original OEM catalogue. Products names, logos, brands and other trademarks featured or referred to within this document are the property of their respective trademark holders.

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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.

4.  

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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