Perforation Straight Bushing Homogeneous Bronze Material

Homogeneous Bronze Straight Perforation Bushing

The perforation straight bushing, made of homogeneous bronze material, is a precision-engineered component designed for specific applications that require high wear resistance and durability. Bronze, known for its excellent corrosion resistance and mechanical properties, ensures that the bushing performs reliably even in demanding environments. The perforation design allows for efficient lubrication and heat dissipation, improving the overall performance of the bushing. Wh used in machinery, equipment, or other industrial applications, the homogeneous bronze perforation straight bushing provides a robust and long-lasting solution.

BRONZE SLEEVES WITHOUT FLANGE WITH PERFORATION
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Technical characteristics
Material: Homogeneous Bronze (Cu 91,3%, Sn 8,5%, P 0,2%)
Yield strength: (Rp0.2) Ca 300 N/mm2
Tensile strength: (Rm) Ca 450 N/mm2
Hardness: Ca 125-150 HB
Friction: 0.08-0.25 µ
Maximum speed: 2.5 m/s
Temperature range: -100 / +200 °C

Load Rate
Ca: 280 N/mm2 0 m/s
80 - 120 N/mm2 0.01 m/s
30 - 40 N/mm2 2,0 m/s

Homogeneous Bronze Straight Perforation Bushing

CuSn8P (DIN 17662)

• DIN 1494 / ISO 3547

Bornze Gleitlager CuSn8 Chemical Composition

Feature:

1. Easy of fitting and lubrication

2. High load capacity

3. Excellent wear resistance with lower friction

4. High level thermal conductivity

5. Minimum overall dimensions

6. Chemical resistance

7. Can work under dry/marginal lubrication for short period, lower friction factor at initial moving

Wrapped bushing, Bronze CuSn8, DIN 1494 / ISO 3547, Low-maintenance Wrapped Bushing Size

The bearings are wrapped from a cold formed homogeneous bronze(CuSn8 or CuSn6.5),which can achieve exceptional material properties. The standard sizes are fitted with diamond shaped lubrication indents on 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.

Mateial

• CuSn8P (DIN 17662)

• DIN 1494 / ISO 3547

Specially Manufacturing Bushings

The manufacturing process starts with cutting the sheet to the correct rectangular shape. Then the plate will be rolled and calibrated to the final size and finished with chamfering the edges.

Range Of Application

Agriculture machinery, truck cranes & construction machinery, suitable for impact loads

Tolerances

Bushings are manufactured according to DIN 1494/ ISO 3574 with standard sizes for H7 housing tolerances and f7 or h8 shaft tolerances.

Request:

It is used in conditions of increased load, but low speed, for example, on agricultural, construction and engineering vehicles.

It is widely used in hoisting machines, construction machines, automobiles, tractors, trucks, machine tools and some mineral engines.

Bushing Types For Sale

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Please contact our technical sales for more information.

Technical Details

• Specific load capacity static< 120 [N/mm2]
• Specific load capacity dynamic< 40 [N/mm2]
• Sliding speed≤ 2.5 [m/s]
• Friction value0.05 [µ] to 0.12 [µ] depending on lubrication
• Temperature strain- 40 [°C] to + 250 [°C]
• Max. PV-value2.8 [N/mm² x m/s]
• The percentage of contact area on the ID is > 75%

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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.

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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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