Oilless Bearings for Travelling Band Screen

We provide custom manufacturing of finished bronze parts and self-lubricating bronze, precisely based on our clients’ drawings.

Oilless Bearings for Travelling Band Screens

Premium Oilless Bearings for Travelling Band Screens – Maintenance-Free Self-Lubricating Bronze Bearings for Water Intake Systems

Oilless bearings for travelling band screens are specially engineered to operate reliably in continuous water treatment and screening systems where lubrication is difficult or impractical. These self-lubricating bearings are typically manufactured from high-strength bronze materials embedded with solid lubricants such as graphite, ensuring smooth operation without the need for external oil or grease.

Why Choose Our Self-Lubricating Oilless Bearings for Your Band Screen Operations?

5 Core Competitive Advantages:

  1. Zero Contamination Risk – Solid graphite lubrication eliminates oil/grease leakage into water sources, ensuring 100% compliance with EPA 316(b) fish protection standards for intake screening systems
  2. 3-5x Extended Service Life – Application-specific bronze alloys (C95800 marine grade, C86300 high-strength, C93200 bearing grade) deliver superior corrosion resistance matched to each operating environment
  3. Extreme Environment Resistance – Specialized formulations withstand seawater, high-temperature cooling water, chemical exposure, and abrasive wastewater without material degradation
  4. Maintenance-Free Operation – Self-lubricating design reduces downtime by 80%, eliminating scheduled lubrication intervals in hard-to-access underwater band screen chain mechanisms
  5. High Load Capacity for Deep Channel Applications – Engineered to support radial loads up to 150N/mm² and operate at speeds up to 5m/s, ideal for band screens with channel depths exceeding 18 meters
Oilless bronze bushing for travelling band screen equipment
Graphite self-lubricating bushing used in travelling water screen system

Upgrade your travelling band screen system with oilless bronze bushings. Designed for water treatment environments with high load capacity and zero lubrication requirements.

Self-Lubricating Design

Oilless Bushing for Travelling Band Screen | Self-Lubricating Bronze Bearings

Industry-Specific Applications – Where Our Oilless Bearings Deliver Maximum Performance

Seawater Desalination Plants – Intake Screening Systems

Recommended Bushing Type: C95800 Nickel Aluminum Bronze with Marine-Grade Graphite Plugs (30% coverage)
Desalination facilities operate in one of the most corrosive environments imaginable—continuous exposure to high-salinity seawater, aggressive chloride ions, and constant wet-dry cycling from tidal variations and splash zones. Standard CuSn8 phosphor bronze simply cannot withstand this level of chemical attack and will suffer rapid dealloying and pitting corrosion.

Our C95800 nickel aluminum bronze oilless bushings are engineered specifically for marine intake applications. This alloy contains 4-5% nickel and 8.5-9.5% aluminum, forming a protective aluminum oxide film that provides 3-5x superior corrosion resistance compared to tin bronzes in seawater environments

. The material excels in resisting:

  • Dealuminification – The nickel content stabilizes the microstructure against selective phase corrosion common in aluminum bronzes
  • Cavitation erosion – Critical for high-flow intake areas where pump-induced pressure fluctuations occur
  • Impingement attack – Withstands turbulent seawater flow carrying sand and shell debris at velocities up to 3.5 m/s
  • Biofouling resistance – Copper-nickel-aluminum matrix naturally inhibits marine organism attachment
The embedded high-density graphite plugs provide continuous self-lubrication even when fully submerged, eliminating any risk of lubricant contamination in the desalination process stream. These bushings handle continuous screening of jellyfish, seaweed, plastic debris, and marine organisms without maintenance interruptions.
Key Installation Points: Main drive sprocket shafts (high torque, slow speed), chain tensioner pivot assemblies (corrosive splash zone), upper/lower guide rail support rollers (full submersion), emergency bypass gate hinge pins (intermittent immersion)
Performance Validation: C95800 bearings in desalination intakes demonstrate 15+ year service life versus 3-5 years for standard bronze alloys, with zero lubrication requirements and no degradation in dimensional stability.

Nuclear, Thermal & Power Plants – Cooling Water Intake Structures

Recommended Bushing Type: C86300 High-Strength Manganese Bronze (ZCuZn25Al6Fe3Mn4) with Heavy-Duty Graphite Plugs (25% coverage)
Power generation facilities demand 24/7 reliability in large-volume cooling water systems handling millions of gallons per hour. For massive travelling band screens in nuclear, thermal, and fossil fuel plants, material selection must prioritize load capacity, impact resistance, and long-term dimensional stability.
C86300 high-strength manganese bronze is the industrial-grade solution that significantly outperforms CuSn10 phosphor bronze in critical power generation applications:
1. Superior Load Capacity (Critical Factor) Travelling band screens in power plants are massive structures—often 10+ meters wide and weighing several tons. When intercepting marine organisms, debris, or ice, they generate enormous radial impact loads. C86300 delivers:
  • Hardness: HB 210+ (vs. HB 70-90 for CuSn10)

  • Tensile Strength: 758 MPa (110 ksi) – 2.5x higher than CuSn10

  • Yield Strength: 427 MPa (62 ksi) vs. ~150 MPa for C93200

  • Maximum Bearing Pressure: 150 N/mm² – Prevents bearing deformation under heavy debris loads that would permanently distort CuSn10
2. Exceptional Wear Resistance in Abrasive Environments Power plant intakes—whether river, coastal, or estuarine—inevitably carry sand, silt, and sediment. C86300’s manganese and iron content (3-4.9% Mn, 2.5-3.5% Fe) creates hard intermetallic phases that resist three-body wear. Combined with 25% graphite coverage, this forms a tougher, more durable lubricating film that delivers 3-5x longer wear life compared to standard tin bronzes in sediment-laden cooling water.
3. Impact and Shock Load Resistance The high strength-to-weight ratio of C86300 absorbs shock loads from:
  • Sudden debris jams in the screen basket
  • Ice formation and breakup in cold climates
  • Hydraulic transients during pump startup/shutdown
  • Seismic events (critical for nuclear safety-related applications)
CuSn10’s softer matrix (HB 70-90) is prone to brinelling and permanent deformation under these conditions, leading to premature failure and potential loss of cooling water supply.
4. Industry Standard Compliance C86300 manganese bronze is the specified material in ASTM standards for heavy-duty water intake machinery. It is the proven “industrial-grade” solution for:
  • Nuclear power plant safety-related cooling water systems
  • Thermal power plant river and coastal intakes
  • Combined cycle plant cooling towers
  • Fossil fuel plant once-through cooling systems
Key Installation Points:
  • Main drive shaft bearings (continuous heavy-duty operation)
  • Idler sprocket assemblies (intermittent shock loading)
  • Underwater guide rollers (submerged, sediment-laden conditions)
  • Debris rake pivot joints (high-torque, corrosive atmosphere)
  • Chain link pins (shear and bearing loads)

Critical Design Note: C86300’s high hardness (225 BHN) requires mating shafts of minimum 300 BHN (Rockwell C 30) to prevent shaft wear. We recommend 4140 steel, hardened 17-4PH stainless, or better for shaft material

.

Performance Validation: C86300 bearings in power plants demonstrate 20+ year service life with zero lubrication maintenance, versus 5-8 years for CuSn10 in equivalent applications.

Refineries & Petrochemical Water Treatment Plants

Recommended Bushing Type: C86300 Manganese Bronze with Chemical-Resistant Graphite Plugs (25% coverage)
Refinery cooling water and process systems expose components to hydrocarbons, hydrogen sulfide, amines, and aggressive chemical cleaning agents. Standard bronzes suffer rapid corrosion in these environments, leading to unexpected failures and safety hazards.
C86300 manganese bronze (SAE 430B) is the industry standard for high-strength, corrosion-resistant bearings in chemical process environments. This alloy contains 3-4.9% manganese and 2.5-3.5% iron, providing:

  • Exceptional mechanical strength – Tensile strength 110 ksi (758 MPa), yield strength 62 ksi (427 MPa) – 2x stronger than C93200 bearing bronze

  • Superior load capacity – Handles 150 N/mm² bearing pressure for heavy debris loads in storm water intakes
  • Chemical resistance – Manganese and iron content improves resistance to weak acids, alkalis, and petroleum derivatives
  • Galling resistance – Hard iron-rich intermetallic phases prevent adhesive wear against steel shafts
Critical for refinery applications: C86300 maintains structural integrity in fire-water systems and emergency cooling circuits where temperatures may spike during upset conditions. The alloy’s high hardness (225 BHN) resists damage from occasional contact with tools during maintenance.
Key Installation Points: Band screen chain link pins (high shear loads), drive mechanism pivot points (corrosive atmosphere), spray pipe support bearings (chemical exposure), fire water intake screen bearings (emergency standby)
Note: C86300 requires hardened steel shafts (minimum 300 BHN) to prevent shaft wear due to its high hardness

Municipal & Industrial Wastewater Treatment Plants

Recommended Bushing Type: C93200 High-Leaded Tin Bronze (SAE 660) with Embedded Graphite Plugs (25% coverage)
Wastewater band screens operate in the most abrasive environment of all water treatment applications—high grit content, sand, gravel, and fibrous material create a constant three-body wear condition. Standard bronzes seize or suffer rapid material loss.

C93200 high-leaded tin bronze (SAE 660) is the proven industry standard for wastewater intake bearings, specifically engineered for applications where embeddability and anti-seizure properties are critical

. This alloy contains 6-8% lead and 6.5-7.5% tin, providing unmatched performance characteristics:

  • Superior embeddability – Soft lead phase allows abrasive particles to embed rather than score shafts, protecting expensive drive components

  • Emergency run-in capability – Lead content provides lubrication during startup before graphite film establishes

  • Conformability – Adapts to minor shaft misalignment common in large channel installations

  • Galling resistance – Prevents catastrophic seizure if debris causes temporary binding

The 6-8% lead content is critical for wastewater applications—lower lead bronzes (C83600 with 4-6% lead) lack sufficient embeddability for high-grit environments

. C93200’s lead distribution ensures continuous lubrication even when graphite plugs are temporarily overloaded with debris.

Technical Validation: Research case studies demonstrate that higher lead content (7-8%) in C93200 enables a protective transfer layer to form on worn surfaces, drastically reducing wear rates compared to lower-lead alternatives . This “softness is strength” paradigm makes C93200 the optimal choice for dirty, abrasive wastewater environments.
For potable water contact applications (drinking water pre-treatment), we provide lead-free alternatives using C95800 nickel aluminum bronze or solid polymer self-lubricating bearings that meet NSF/ANSI 61 standards .
Key Installation Points: Chain flight scraper systems (abrasive sludge), sludge collector bearings (grit exposure), screen panel pivot joints (fouling resistance), grit chamber rake bearings (maximum abrasion)

Steel Mills & Sugar Processing Facilities

Recommended Bushing Type: C86300 Manganese Bronze for High Temperature / C95800 Ni-Al Bronze for Corrosive Process Water
Industrial process water in steel mills and sugar refineries presents dual challenges: high temperatures (up to 85°C in cooling circuits) and aggressive chemistry (mill scale in steel plants, sugar juice acids in refineries).
For Steel Mill Applications: C86300 manganese bronze handles the thermal and mechanical demands of steel mill cooling systems:

  • Operating temperature up to 400°C without loss of mechanical properties

  • Resistance to mill scale and rolling oil contamination in direct cooling water
  • High load capacity for band screens handling heavy scale debris
  • Compatibility with high-pressure spray cleaning systems (up to 100 bar)
For Sugar Refinery Applications: C95800 nickel aluminum bronze resists the acidic, high-temperature sugar juice environment:
  • Excellent resistance to organic acids (citric, oxalic) in process water
  • No contamination risk to food-grade sugar products (lead-free)
  • High strength for screens handling sugar cane fiber (bagasse) debris
  • Corrosion resistance in the 60-80°C temperature range typical of sugar processing
Both alloys provide the maintenance-free operation essential in 24/7 industrial processing where downtime costs thousands per hour.
Key Installation Points: Cooling tower intake screens (high temperature), process water filtration systems (chemical exposure), scale pit dewatering screens (abrasive solids), cane wash water intakes (fiber handling)

Suggested Searches: Copper， Brass， Bronze， Copper Nickel， Manganese， Aluminum

Product Range – Custom Oilless Bearings for Band Screen Systems

Cylindrical Oilless Bearings
Standard press-fit design for shafts and chain links. Available in materials like C95800 (marine), C93200 (wastewater), and C86300 (high load).
Size: 10–500 mm ID | Thickness: 2–50 mm | Graphite patterns customizable.

Flanged Oilless Bearings
Designed for axial positioning and thrust loads in sprockets and rollers. Single or double flange options.
Flange size up to 1.5× OD | Optional mounting holes and grooves.

Thrust Washers & Slide Plates
Flat oilless bearings for axial load support and sliding surfaces.
Thickness: 3–25 mm | Custom shapes available | Materials for corrosion or heavy load conditions.

Maintenance Free Oilless Bearings for Travelling Band Screen Systems
Oilless Bearings Solutions for Travelling Water Screens

Material Selection Guide – Matching Bushing Alloy to Your Water Environment

Environment Recommended Material Key Properties Graphite Density Special Treatment
Seawater/Saltwater C95800 Nickel Aluminum Bronze corrosion resistance, cavitation immunity 30% Anti-fouling surface treatment
Power Plant CWIS (Heavy Load) C86300 Manganese Bronze Highest strength (758 MPa), HB 210+, impact resistance 25% Hardened steel shaft (300+ BHN) required
Chemical Process Water C86300 Manganese Bronze High strength, chemical resistance, 400°C max temp 25% Hardened steel shaft required
Abrasive Wastewater C93200 High-Leaded Bronze Superior embeddability, anti-seizure, 6-8% lead content 25% Lead-free alternative: C95800
Potable Water/Irrigation C95800 Nickel Aluminum Bronze Lead-free, biofilm resistance 25% C95800 Nickel

Ordering Information – Custom Oilless Bearings for OEM & Replacement

bronzeoilless.com offers fast, flexible manufacturing of oilless bearings for travelling band screen systems.

Services Available

  • OEM Production: Precision manufacturing based on your drawings with full material certification

  • Replacement Parts: Reverse engineering with upgraded materials for longer service life

  • Emergency Orders: Fast delivery within 48 hours for standard sizes

Information Required for Quotation

  • Inner diameter, outer diameter, and length

  • Flange dimensions (if applicable)

  • Operating environment (seawater, freshwater, chemical, abrasive)

  • Load and speed requirements (PV value if available)

  • Mating shaft material and hardness

  • Quantity and delivery schedule

Submit your specifications to receive a fast and accurate quote for custom oilless bearing solutions.

Corrosion-resistant oilless bushing for water treatment plant screens

Frequently Asked Questions – Oilless Bushings for Travelling Band Screens

A: C86300 delivers 2.5x higher tensile strength (758 MPa vs. ~300 MPa) and 3x higher hardness (HB 210+ vs. HB 70-90) than CuSn10 . For massive travelling band screens handling heavy debris and impact loads, C86300 prevents permanent deformation and provides 20+ year service life versus 5-8 years for CuSn10.

A: C95800 contains 4-5% nickel and 8.5-9.5% aluminum, forming a protective aluminum oxide film that provides 3-5x superior corrosion resistance in chloride environments . Standard CuSn8 phosphor bronze suffers rapid dealloying and pitting in seawater, leading to 3-5 year failure versus 15+ years for C95800.

A: No. C93200 contains 6-8% lead and is not suitable for drinking water contact. For potable water and irrigation systems, we recommend C95800 nickel aluminum bronze (lead-free, NSF/ANSI 61 compliant)

A: Our solid graphite lubrication system contains no liquid oils or greases that can leak into water sources. The graphite is mechanically embedded in the bronze matrix and releases only microscopic lubricating particles during operation, eliminating any risk of environmental contamination.

Custom CNC Oil-free Bearing Solutions

Custom Oil-Less Bearing Bushing

Self-lubricating bearing selection and drawing confirmation