The SF-1 Bush, made from carbon steel with a self-lubricating plain bearing material, is a type of bearing designed to operate with minimal maintenance and without the need for external lubrication. Here’s a breakdown of its key features and applications:

Key Features:
Base Material: Carbon Steel

The backing material is typically carbon steel, which provides high strength and durability. Carbon steel is known for its excellent load-bearing capacity and resistance to wear.

Self-Lubricating Layer:

The bearing surface is coated or lined with a self-lubricating material, often a composite containing PTFE (Polytetrafluoroethylene) or other solid lubricants like graphite or MoS2 (Molybdenum Disulfide).

This layer reduces friction and wear, allowing the bearing to operate smoothly without the need for external lubrication.

Low Friction:

The self-lubricating properties ensure low friction, which is beneficial for reducing energy consumption and heat generation during operation.

High Load Capacity:

The combination of carbon steel and the self-lubricating layer allows the bearing to handle high radial and axial loads.

Maintenance-Free:

Since the bearing is self-lubricating, it requires little to no maintenance, making it ideal for applications where regular lubrication is difficult or impossible.

Corrosion Resistance:

Depending on the specific formulation of the self-lubricating layer, the bearing may offer some degree of corrosion resistance, though this is not its primary feature.

Applications:
Automotive Industry: Used in suspension systems, steering components, and other moving parts where lubrication is challenging.

Industrial Machinery: Ideal for heavy-duty machinery, conveyor systems, and equipment operating under high loads.

Agricultural Equipment: Used in machinery that operates in harsh environments where maintenance is infrequent.

Construction Equipment: Suitable for use in cranes, excavators, and other heavy equipment.

Marine Applications: Can be used in marine environments, provided the self-lubricating layer offers adequate corrosion resistance.

Advantages:
Reduced Maintenance Costs: Eliminates the need for regular lubrication, reducing downtime and maintenance costs.

Extended Service Life: The self-lubricating layer reduces wear, extending the lifespan of the bearing.

Improved Performance: Low friction and high load capacity contribute to smoother operation and better performance.

Considerations:
Temperature Limits: The self-lubricating materials may have temperature limitations, so it’s important to ensure the bearing is suitable for the operating environment.

Load and Speed: While SF-1 bearings are capable of handling high loads, the specific load and speed ratings should be considered for each application.

In summary, the SF-1 Bush with a carbon steel base and self-lubricating plain bearing material is a robust, maintenance-free solution suitable for a wide range of industrial applications where high load capacity and low friction are required.

The SF-1 Bush is a carbon steel self-lubricating plain bearing made from (Polytetrafluoroethylene) material. This bushing is designed to provide excellent wear resistance and friction reduction without the need for external lubrication, making it suitable for a wide range of industrial applications.

The carbon steel construction ensures high strength and durability, while the material provides excellent lubrication properties, enabling the bushing to operate smoothly and efficiently. The self-lubricating feature significantly reduces maintenance requirements and extends the service life of the bearing.

The SF-1 Bush is precision-manufactured to ensure a secure and reliable fit in machinery. Its compact design allows for easy installation and integration into existing systems. Wh you're upgrading existing equipment or designing new machinery, the SF-1 Bush Carbon Steel Self-Lubricating Plain Bearing Material is an excellent choice for improving performance and reducing downtime.

Contact us today to learn more about the SF-1 Bush and how it can enhance the efficiency and reliability of your industrial operations.

BUSHES TYPE SF-1

SF-1 Plain Bearings Inch Size, Self-Lubricating Bearings, China Bushings - Metal Polymer

SF-1 Standard Tolerance Dimension Table

Unit:mm

MAJOR APPLICATIONS

Shock absorbers bushing, gear pumps bushings, and pumps sleeve bush

This is an environmentally friendly, lead-free bushing bearing, the material structure of which consists of multiple layers of , porous intermediate layer, and steel-backed bushes

Material: Steel-Bronze/

resin + porous intermediate layer + steel lining

The application method of the oil-free bushing is introduced.

Viiplus is always focusing on Metal-Polymer Bearings bearings, by satisfying the ever-increasing demands of modernization of customers. Viiplus is a professional bush manufacturers, We could provide bushing replacement according to the international standards, and could also provide as per the customers' requests. With stable bushing replacement quality and the best level of services, our products have been exported to dozens of countries and regions from Europe, the United States, and Southeast Asia, etc.

Tech. Data

Typical Applications

Automotive applications include steering system, shock absorbers, door hinges, seat recliners, seat frames and magnetic valves; It is widely used in the general industry like gear pumps, vane pumps, piston pumps, air cylinders and hydraulic cylinders; The other applications include material handling machinery, packing machines, textile machines, forest machines and the home appliances such as the air conditioners, body fit machines, washing machine and refrigerators, etc.

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.

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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.

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.