When it comes to cylindrical bearing bushings, having metric standard sizes available is crucial for a wide range of applications. Composite bushings, specifically those made of metal polymer composite (MPC) materials, offer several advantages for cylindrical bearing applications.

Metric standard size cylindrical bearing composite bushings are designed to fit into standard metric-sized bearing housings and shafts. This ensures compatibility and ease of installation in various machinery and equipment.

MPC composite bushings offer several key benefits:

High load capacity: MPC materials are reinforced with metal compounds, providing excellent strength and durability to handle heavy loads and torques.
Low friction: The combination of metal and polymer compounds results in a low-friction material, reducing wear and energy loss.
Self-lubricating: MPC bushings do not require external lubrication, making them maintenance-free and reducing the risk of contamination or leakage.
Chemical resistance: MPC bushings are resistant to chemicals and harsh environments, making them suitable for demanding applications.
Metric standard size cylindrical bearing composite bushings are available in various diameters, lengths, and wall thicknesses to meet specific application requirements. They can be easily installed into existing bearing housings using standard tools and techniques.

Overall, metric standard size cylindrical bearing composite bushings provide an effective solution for various machinery and equipment, offering high load capacity, low friction, and chemical resistance while requiring minimal maintenance.

Metric Standard Size Available Cylindrical Bearing Composite Bushing

Metric Standard Size Available Cylindrical Bearings - Composite Bushing.Made in China Manufacture of slide bearing,bronze bushing,solid cast bronze bearing,oilless bushing,wrapped bronze bushing,bimetal bushing, bushing,etc.Bronze Bushing Bearing,WB FB Bronze Bushing, Bush,Composite Bushing: SF-1 PAP PAF PAS P10 P20 SF-2 POM

• 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.

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.

• 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.

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.

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.