Slit Oilless Bronze Bushings for Hydraumatic Applications, Material: CuSn8P (Phosphor Bronze), Size: 40x44x40 (BMZ 4040) are components designed for use in hydraulic systems where lubrication oil is not readily available or desired. These bushings feature a slit design that allows for slight expansion or contraction, accommodating minor misalignments or shaft movements while maintaining a secure and wear-resistant fit. The CuSn8P (Phosphor Bronze) material is chosen for its excellent corrosion resistance, high strength, and good wear properties, making it suitable for demanding hydraulic applications. The 40x44x40 size (BMZ 4040) indicates the outer diameter, inner diameter, and length of the bushing, respectively.

RoHS compliant. • Wrapped Bronze Bushing CuSn8 material made of solid bronze strip with indents for lubrication. • Good wear resistance, suitable for rough conditions.

Bronze bushing BMZ 4040 size is made of Bronze and has dimensions of 40mm inner diameter by 44mm outer diameter and a length of 40mm. Low maintenance because it has lubrication depots. High load-bearing capacity and strength with low wear, suitable for rough use, corrosion-resistant Bronzes with lubrication deposits. Low maintenance. Corrosion-resistant. For high loads.

Diamond solid self-lubricating oil-free bearing

Low-maintenance wrapped bronze sliding bearing, with lubrication pockets

Good load capacity and stability at low abrasion, suited for operation, corrosion-resistant.

Product specifications
Material & dimensions
Dimensions 4 x 4 x 4 cm
Width 4 cm
Height 4 cm

MATERIALS Support material CuSn8P (DIN 17662)

BMZ Cylindrical bushing

BMB Flanged bushing

BMA Thrust washer

BMS Strip

SHAFT MATERIAL

Steel, hardened or untempered, surface roughness < Rz 6,3

MAINTENANCE

This is a low-maintenance bronze sliding bearing, primary lubrication is necessary. Oil or grease lubrication is possible. Due to lubrication pockets lubrication clear- ances are reduced to a minimum.

Slit Oilless Bronze Bushings For Hydraumatic CuSn8P 40x44x40 BMZ 4040 Size

VIIPLUS provides hydraulic system users with a complete set of sliding bearing solutions.The products are: gear pump aluminum seat assembly, shaft sleeve, side plate;Distribution plate, return plate and shaft sleeve for vane pump and plunger pump;Cylinder sleeve and so on.We offer high quality Oilless Bearings, Bushings.Bronze Slit Bushing, 40x44x40mm BMZ 4040 Size bronze bushing with tin bronze alloy CuSn8P DIN 17662. CW453K Wrapped Bronze Bearing:BK-090, BRM10, COB-090, MBZ-B09, PRM, PRMF, SERIE SBA, SERIE SBB, WB700, WF-WB 700 MADE IN CHINA.

The bronze bushing is made of tin bronze CuSn8P. The surface is stamped with diamond oil sockets, which are stored to save oil. It has good anti-fatigue, anti-erosion anti-abrasion and durability. The products are often used under conditions of high load and low running speed, e.g. B. in agricultural, construction and engineering machinery.Bronze bearing, with special formula of high density copper alloy as the matrix, the surface can be rolled according to user's requirements diamond or hemispherical oil boots, oil groove.With high density and high bearing pressure, good wear resistance, long life and other advantages, to replace the traditional copper casting sets, can reduce the size of our machinery, reduce cost, FB090 to widely used in hoisting machinery, construction machinery, automobile tractor chassis, machine tool industry and mining machinery, also can be made into bearing, flanged bushes, thrust washers, and qiu bowl and so on.

Chemical Compositions

The installation

The bearing shall be pressed into the bearing seat of tolerance H7.Bearing bore tolerance H9.
Shaft - bearing fit
For bearing with tolerance H9, we recommend e7 or f7 as the tolerance for the shaft.If h axis is selected, it is recommended that the bearing inner diameter tolerance be F7.
lubrication Bushing
Lubrication shall be achieved by passing the shaft or radial through the bearing housing.All common grease types or oils can be used.
Non-standard custom
We can recommend the appropriate size, shape, and shape or length upon request.Please contact us for quotation or more information.

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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