The metric graphite plugged sleeve with dimensions of 50mm inner diameter (ID), 60mm outer diameter (OD), and 50mm length is a specialized component designed for applications requiring precise fitment, wear resistance, and self-lubrication.
Constructed from high-quality materials, this sleeve incorporates graphite plugs that provide natural lubrication, reducing friction and wear between the sleeve and mating surfaces. This self-lubricating feature eliminates the need for external lubricants, simplifying maintenance and reducing operational costs.
The metric size of 50x60x50 ensures precise fitment in equipment components with matching dimensions. The sleeve's length of 50mm provides ample contact area for secure positioning and stable performance.
Applications for this type of graphite plugged sleeve range from heavy machinery to precision equipment where reliable and long-lasting wear protection is essential. Whether used in mining, manufacturing, or other industries, this sleeve offers a robust and dependable solution for ensuring smooth and efficient operation.

Graphite Plugged Bushings

Our company produces various brands of copper alloy bushing and bearings:
Brass: Ordinary bronze, extra hardness bronze (HB>250), etc.Aluminum bronze: ZCuAl10Fe3, ZCuAl9Fe4Ni4Mn2, CuAl10Ni, and other tin bronze: ZCu5Pb5Zn5, CuSn7Zn4Pb7, CuSn8, CuSn12, ZCuSn10P1, etc.High lead copper: ZCuPb10Sn10, CuPb15Sn7, and other bushings can be produced according to DIN, BS, EN, UNS, SAE, and Chinese GB standards according to different customer requirements (for example CuZn39Pb3, CuZn40Al2, C86200, C95800, C48200).
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Size 506050 | Metric Graphite Plugged Sleeve | 50 ID x 60 OD x 50 Length

Self Lubricating Graphite Plugged Bronze Sleeve Bushing

Plug Graphite Sleeve Bushing Die Components
Self-Lubricating Guide Systems Standard Components

“We have been a customer of Reliable Bronze for many years and have always found that from a price, quality, and delivery perspective… they cannot be beaten.”
Bronze Bushing Products for Every Industry!
Economical bearing: insert type solid lubrication bearing
Inlaid bearings not only save oil and energy but also have a longer working life than ordinary sliding bearings. Metal base inlaid solid self-lubricating bearing (JDB for short) is a kind of novel self-lubricating bearing that has the characteristics of both metal bearing and self-lubricating bearing. The metal substrates bear most of the load during the friction process. Through friction, the solid lubricant in the oilless bearing bushing in the hole or groove transfers or reversely transfers to the friction surface, forming a solid transfer film with good lubrication, firm adhesion, and uniform coverage on the friction surface, which greatly reduces friction and wears.As the friction of self-lubricating steel sleeve is carried out, the embedded solid lubricant is constantly provided on the friction surface to ensure good lubrication of the friction pair during long-term operation. It breaks through the boundaries of ordinary bearings depending on oil film lubrication. It has the advantages of high bearing capacity, impact resistance, high-temperature resistance, small friction coefficient, low abrasion, no noise, strong self-lubrication performance, etc. It is especially suitable for heavy load, low speed, reciprocating or oscillating, etc.

High Tensile Manganese Bronze Solid
High Tensile Brass

Our company produces various grades of copper alloy products:

Block Guide In Bronze-Graphite
Modular Block In Bronze-Graphite
Bronze-Graphite Block Guide Plate Side
Bronze-Graphite Guide Plate
Bronze-Graphite Guide
Bronze-Graphite Guide

Self Lubricated for Higher Temperatures and Heavier Loads

Solid self-lubricating bearing with graphite plug insert | Graphite copper sleeve bushings

• Inch Sized Bushings
• Metric Sized Bushings

Material:

C86300 Manganese Bronze
C86300 Typical applications include slow speed heavy duty load bearings, gears, cams, and hydraulic cylinder parts.

continuous cast manganese bronze is a high strength, non-heat treatable copper alloy intended for use in applications requiring a good combination of outstanding wear characteristics and high bearing strength for heavy loads and slow speeds.

Bronze sleeve bearings flanged bronze bushings for sale

Performance

Graphite Plugged Cast Bronze Bushings can be utilized where heavy loads must be supported at low to medium speeds

The Plug Graphite Cast Bronze Bushing is able to withstand high temperatures up to 570 F
The self-lubricating feature allows bearings to be used where oiling is difficult, expensive to implement, and where grease/oil cannot be used. Excellent lubrication is achieved even under high loads at low speeds.
Self-lubrication with specially embedded solid lubricants reduces friction. Coefficient of Friction: 0.04 to 0.2

Technical Data

Applications

Bushings for Construction Equipment, Boom Link Bushings for Power Shovels, Toggle Link & Guide Bushings for Injection Mold Machines, Steel Mill Equipment, Furnace Dragouts, Drying Equipment, Roasters, Press Dies, Assembly Lines, Hydro-Electric Structures, Winches, Hoisting Equipment, Tire and Paper Mill Machinery and Many Other Industrial Applications.

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.