Bus Alloy Bearing Shell
+
  • Bus Alloy Bearing Shell

1. Introduction to Babbitt Alloy Bearings

Babbitt alloy bearings are sliding bearing components lined with Babbitt alloy, a bearing alloy based on tin (Sn) or lead (Pb) with a low melting point and a soft matrix uniformly distributed with hard particles. They are mainly used in conjunction with journal bearings and are widely applied in the rotating systems of large machinery. Their application fields cover multiple heavy industries, including cement machinery (such as cement ball mills), steel machinery (such as steel plant fans), chemical machinery, paper machinery (such as drying cylinders), petroleum machinery, ship machinery (such as ship propeller shaft sleeves), compression machinery, coal mining machinery, mineral processing equipment, and also key components like bearings, bushings, and liners in large machine tools, hydraulic turbines, steam turbines, and generator sets.

2. Core Characteristics and Material Classification of Babbitt Alloy Bearings

1. Material Classification and Composition Features

  • Tin-based Babbitt Alloy: The main components are tin, antimony, and copper, with some containing lead. Typical composition (mass fraction) includes antimony 3%~15%, copper 2%~6%, cadmium 1% (balance tin). Chinese grades are denoted as "ZChSnSb", such as ZChSnSb11-6. Its microstructure consists of a soft matrix phase (α solid solution) and hard phase particles (SnSb intermetallic compounds, Cu6Sn5 star-shaped/striped compounds), offering good friction reduction, wear resistance, corrosion resistance, and thermal conductivity, suitable for high-speed heavy load conditions.
  • Lead-based Babbitt Alloy: Uses lead as the matrix, containing antimony, tin, and other elements. It is cost-effective and suitable for medium to low speed and light load conditions, but its overall performance is slightly inferior to tin-based alloys.
  • Cadmium-based Babbitt Alloy: Less commonly used, mainly applied in specific corrosive environments.

2. Performance Advantages

Friction Reduction and Wear Resistance: After initial wear of the soft matrix during operation, the hard phase particles support the journal, maintaining a low friction coefficient, with good running-in and embedding properties (able to accommodate tiny impurities).

Mechanical and Environmental Adaptability: Exhibits good compliance (adapting to journal misalignment), seizure resistance, shock and compression resistance, as well as resistance to high and low temperatures and corrosive media.

Excellent Embedding Ability: The soft matrix allows small hard particles (such as dust and metal debris) to embed, preventing scratches on the journal.

Good Compliance: Can slightly deform to accommodate minor shaft bending or misalignment.

Seizure Resistance: Has a low friction coefficient with steel journals, making cold welding (seizure) unlikely.

Good Oil Affinity/Wettability: Easy to establish and maintain a lubricating oil film.

Certain Fatigue Resistance: Can withstand alternating loads (especially tin-based alloys).

3. Key Manufacturing Processes

Bearing Cleaning: Place the steel shell bearing in a 10%-15% cleaning agent solution for rust removal, then wash with 80°C hot water, and finally remove residual dirt with 70°C hot water. Do not touch the cleaned inner surface with hands.

Centrifugal Casting: Use centrifugal casting technology to uniformly attach the alloy layer to the steel shell, ensuring no pores or sand holes and firm bonding. The alloy layer thickness should be adjusted according to working conditions: thicker coatings for high load, high speed, high temperature, or corrosive environments; thinner coatings otherwise.

3. Main Application Scenarios

Babbitt alloy bearings (especially tin-based) are widely used in medium to high speed, medium to heavy load sliding bearings requiring high reliability, low friction, good impact resistance, and journal protection.

For example: Large power machinery: main and connecting rod bearings of steam turbines, gas turbines, hydraulic turbines, large generators, and compressors.

Marine power: diesel engine crankshaft bearings, crosshead bearings, thrust bearings.

Heavy machinery: bearings of rolling mills and mining machinery.

Internal combustion engines: (some older or large diesel engines still use them). Precision machine tool spindle bearings.

Common Damage and Repair Methods

  • Damage Causes: Mainly include bearing burn (due to poor lubrication or overload), vibration wear, corrosion fatigue, etc. Severe damage can cover more than one-third of the bearing surface area.
  • Repair Methods: Damaged bearings can be refurbished by casting, restoring performance through re-casting Babbitt alloy, suitable for repairing bearings of drying cylinders, fans, and other equipment.

4. Usage and Maintenance Recommendations

Regular Inspection: Monitor bearing wear conditions to prevent equipment shutdown caused by localized damage expansion.

Lubrication Management: Ensure good lubrication to prevent severe failures such as bearing burn.

Temperature Control: Avoid prolonged operation in temperatures exceeding the alloy's tolerance range to maintain structural stability.

Keywords

Previous: New High-Pressure Roller Wear-Resistant Overlay Welding Technology

Next： Large ball mill ZGMN13CR2 liner

Bus Alloy Bearing Shell
+
  • Bus Alloy Bearing Shell

Bus Alloy Bearing Shell

Our company specializes in manufacturing wear-resistant castings for grinding equipment, as well as main bearing shells and support shells of various specifications for mills.

Contact Information

Contact Us

Phone: +86-18695999359

Email: sales@zszxjx.com

Product Categories

Wear-resistant products

Product Inquiry Related Products File Download

Get a Quote

Note: Please leave your contact information, our professionals will contact you as soon as possible!

Submit

Related Products

Related Products

Ball mill

Ball mill

Rod Mill

(Semi) Autogenous Mill

Mining Hoisting

Single-rope Winding Mine Hoist

Multi-rope friction mine hoist

Well Drilling Hoist

Supporting Equipment

Mining Washing and Selection

Selective Crusher

Centrifuge

Flotation machine

Filter machine

Grading Machine

Mining Auxiliary Equipment

Gear Reducer Series

Category One

Category Two

Crusher Series

Rotary Crusher

Jaw Crusher

Impact Crusher

Cone Crusher

Ball Press Machine

High-pressure briquetting machine

Medium and High Pressure Briquetting Machine

Roller Press

Rotary kiln

Cast and forged parts

Large castings

Large Forgings

Transmission Accessories

Crankshaft

Gear Coupling

Gear

Electro-hydraulic control system

Automation Control

Hydraulic System

Hydraulic cylinder

Other accessories

Large welded components

Wear-resistant products

Engineering Plastics

Roller shaft

COOKIES

Our website uses cookies and similar technologies to personalize the advertising shown to you and to help you get the best experience on our website. For more information, see our Privacy & Cookie Policy

COOKIES

Our website uses cookies and similar technologies to personalize the advertising shown to you and to help you get the best experience on our website. For more information, see our Privacy & Cookie Policy

These cookies are necessary for basic functions such as payment. Standard cookies cannot be turned off and do not store any of your information.

These cookies collect information, such as how many people are using our site or which pages are popular, to help us improve the customer experience. Turning these cookies off will mean we can't collect information to improve your experience.

These cookies enable the website to provide enhanced functionality and personalization. They may be set by us or by third-party providers whose services we have added to our pages. If you do not allow these cookies, some or all of these services may not function properly.

These cookies help us understand what you are interested in so that we can show you relevant advertising on other websites. Turning these cookies off will mean we are unable to show you any personalized advertising.

%E7%AC%AC%E4%B8%80%EF%BC%8C%E6%9C%80%EF%BC%8C%E4%BC%98%E7%A7%80%EF%BC%8C%E5%A2%9E%E5%BC%BA%EF%BC%8C%E4%B8%80%E6%B5%81

Sorry，当前栏目暂无内容!

您可以查看其他栏目或返回 首页

Sorry，The current column has no content!

You can view other columns or return Home