Thrust washers, specifically those with metric size Metal-Polymer Low Friction Plain Bearings plain bearings, are crucial components in many mechanical systems. These washers are designed to provide a smooth, reliable, and low-friction interface between two moving surfaces that are in a thrusting or axial loading condition.

The Metal-Polymer Low Friction Plain Bearings designation refers to the material and quality grade of the plain bearing, ensuring that it meets certain standards for hardness, wear resistance, and dimensional accuracy. The metric size indicates that the thrust washer follows the metric system of measurement, which is widely used in engineering and manufacturing.

Thrust washers are typically made from high-quality materials such as bronze, steel, or polymers, and they are precision-engineered to ensure they fit precisely within the mechanical system. Their purpose is to reduce friction, wear, and heat generation between moving surfaces, thereby extending the lifespan of the overall system.

In applications where lubrication may not be feasible or desired, plain bearings like the Metal-Polymer Low Friction Plain Bearings thrust washer are especially useful. They rely on the inherent lubricity of the material and the precision fitment to achieve smooth operation.

Common applications for thrust washers with metric size Metal-Polymer Low Friction Plain Bearings plain bearings include automotive transmissions, industrial machinery, and other precision equipment where reliable thrust transmission is crucial. By selecting the appropriate thrust washer, you can ensure that your mechanical system operates smoothly, efficiently, and with minimal wear and tear.

Metal-Polymer Low Friction Plain Bearings thrust washers - metric Metal-Polymer Low Friction Plain Bearings material properties,

Metal-Polymer Low Friction Plain Bearings Thrust Washers - material properties. Other dimensions available on request. WC08Metal-Polymer Low Friction Plain Bearings. WC10Metal-Polymer Low Friction Plain Bearings. WC12Metal-Polymer Low Friction Plain Bearings. WC14Metal-Polymer Low Friction Plain Bearings. WC16Metal-Polymer Low Friction Plain Bearings.

Part No. WC60Metal-Polymer Low Friction Plain Bearings, WC08Metal-Polymer Low Friction Plain Bearings, WC10Metal-Polymer Low Friction Plain Bearings, WC12Metal-Polymer Low Friction Plain Bearings, WC14Metal-Polymer Low Friction Plain Bearings, WC16Metal-Polymer Low Friction Plain Bearings, WC18Metal-Polymer Low Friction Plain Bearings, WC20Metal-Polymer Low Friction Plain Bearings, WC22Metal-Polymer Low Friction Plain Bearings, WC24Metal-Polymer Low Friction Plain Bearings, WC25Metal-Polymer Low Friction Plain Bearings, WC30Metal-Polymer Low Friction Plain Bearings, WC35Metal-Polymer Low Friction Plain Bearings

Metal-Polymer Low Friction Plain Bearings WASHER SIZE CHART FIND YOUR PART NO

Part No.	Di (mm)	Do (mm)	ST (mm)	dD (mm)	dP (mm)	Ha max. (mm)	Ha min. (mm)
WC08Metal-Polymer Low Friction Plain Bearings	10	20	1.5	0	0	1.2	0.95
WC10Metal-Polymer Low Friction Plain Bearings	12	24	1.5	1.75	18	1.2	0.95
WC12Metal-Polymer Low Friction Plain Bearings	14	26	1.5	2.25	20	1.2	0.95
WC14Metal-Polymer Low Friction Plain Bearings	16	30	1.5	2.25	22	1.2	0.95
WC16Metal-Polymer Low Friction Plain Bearings	18	32	1.5	2.25	25	1.2	0.95
WC18Metal-Polymer Low Friction Plain Bearings	20	36	1.5	3.25	28	1.2	0.95
WC20Metal-Polymer Low Friction Plain Bearings	22	38	1.5	3.25	30	1.2	0.95
WC22Metal-Polymer Low Friction Plain Bearings	24	42	1.5	3.25	33	1.2	0.95
WC24Metal-Polymer Low Friction Plain Bearings	26	44	1.5	3.25	35	1.2	0.95
WC25Metal-Polymer Low Friction Plain Bearings	28	48	1.5	4.25	38	1.2	0.95
WC30Metal-Polymer Low Friction Plain Bearings	32	54	1.5	4.25	43	1.2	0.95
WC35Metal-Polymer Low Friction Plain Bearings	38	62	1.5	4.25	50	1.2	0.95
WC40Metal-Polymer Low Friction Plain Bearings	42	66	1.5	4.25	54	1.2	0.95
WC45Metal-Polymer Low Friction Plain Bearings	48	74	2	4.25	61	1.7	1.45
WC50Metal-Polymer Low Friction Plain Bearings	52	78	2	4.25	65	1.7	1.45
WC60Metal-Polymer Low Friction Plain Bearings	62	90	2	4.25	76	1.7	1.45

Structure:

1. / Conductive additive mixture layer thickness 0.02~0.06mm, provides a low friction coefficient and good wear resistance feature. It is an electrical conductive material.

2. Sintered bronze powder thickness 0.20-0.35mm, provides strong mechanical bond and excellent thermal conductivity.

3. Steel backing Provides mechanical strength.

Tech. Data

Max. load	Static	250N/mm²		Temp. limit		-195°C~+280°C
	Very low speed	140N/mm²		Max.speed	Dry running	2m/s
	Rotating oscillating	60N/mm²			Hydrodynamic operation	>2m/s
Max. PV Dry running	Short-term operation	3.6N/mm²*m/s		Thermal conductivity		42W(m*K)-1
	Continuous operation	1.8N/mm²*m/s		Coefficient of thermal expansion		11*10-6*K-1
Max. PV Hydrodynamic Lubricate		30N/mm²*m/s		Friction coefficient	Dry running	0.08~0.20
					Hydrodynamic operation	0.03~0.08

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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