Oilless Bush Bearings for Water Infrastructure

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

Solid Bronze Bushing oilless bush bearing Self-lubricating bronze bushings are widely used in flood control gates, Archimedes screw pumps, and flap gates.

Oilless Bush Bearings for Water Infrastructure Applications

oilless bush bearing Self-lubricating bronze bushings are widely used in flood control gates, Archimedes screw pumps, and flap gates.

In modern water infrastructure and flood control systems, machinery operates in extremely harsh environments — including submersion in water, mud, sand, salt spray, and heavy loads. Traditional lubricated bearings require frequent maintenance, and lubrication loss often leads to unexpected downtime.

Oilless bush bearings (self-lubricating bearings) provide a reliable solution. With maintenance-free operation, superior wear resistance, and excellent corrosion resistance, they are widely used in Archimedes screw pumps, flood gates, hydraulic submersible pumps, trash rakes, rotary screens, penstocks, and stop logs.

Advantages of Oilless Bush Bearings

  • Maintenance-Free: No need for additional grease or oil.

  • Corrosion Resistance: Withstand long-term water immersion and chemical attack.

  • High Load Capacity: Suitable for slow, heavy-duty, or oscillating movements.

  • Eco-Friendly: Prevents lubricant leakage and water pollution.

Applications of Oilless Bush Bearings in Water Infrastructure

1. Archimedes Screw Pump

  • Bearing Position: End supports, intermediate support bushings

  • Operating Conditions: Submerged, low speed, heavy loads

  • Solution: Bronze-based solid lubricant bushings (CuSn12, C86300) for excellent wear resistance and anti-scouring performance

2. Flood Gate & Flap Gate

  • Bearing Position: Gate hinge, operating mechanism shaft

  • Operating Conditions: Intermittent opening/closing, sand abrasion, water immersion

  • Solution: C86300 manganese bronze with graphite plugs for shock load resistance and smooth operation

3. Hydraulic Submersible Pump

  • Bearing Position: Pump shaft, guide sleeve

  • Operating Conditions: Fully submerged, high-speed rotation

  • Solution: Stainless steel + PTFE composite bushings for corrosion resistance and oil-free operation

4. Hydraulic Trash Rake

  • Bearing Position: Rake arm joints, hydraulic cylinder connections

  • Operating Conditions: Heavy load, frequent impact, repetitive motion

  • Solution: Bronze with solid graphite lubricants to reduce friction and avoid seizure

5. Mechanical Rotary Screen

  • Bearing Position: Drum support bearings

  • Operating Conditions: Continuous duty, wastewater with abrasive particles

  • Solution: Polymer composite bearings for sand resistance and long service life

6. Penstock (Pressure Pipe Gates)

  • Bearing Position: Operating shaft, support points

  • Operating Conditions: High water pressure, frequent operation

  • Solution: High-strength aluminum bronze (C95500, C63000) with embedded lubricants

7. Stop Log

  • Bearing Position: Lifting lugs, guide rail supports

  • Operating Conditions: Intermittent use, high static load

  • Solution: Solid-lubricant bronze bushings for long-term load-bearing without deformation

8. Logboom (Floating Debris Barrier)

  • Bearing Position: Chain links, float pivots

  • Operating Conditions: Floating in water, wave impacts

  • Solution: Stainless steel + composite self-lubricating bushings for corrosion resistance and anti-seawater galvanic protection

Equipment Bearing Position Operating Conditions Recommended Materials Solution
Archimedes Screw Pump End supports, intermediate bushings Submerged, low speed, heavy loads Bronze (CuSn12, C86300) Wear & scour resistant
Flood / Flap Gate Gate hinge, shaft points Opening/closing cycles, sand abrasion C86300 Manganese Bronze + Graphite Shock resistance, smooth operation
Hydraulic Submersible Pump Pump shaft, guide sleeve Fully submerged, high speed Stainless steel + PTFE composite Oil-free, corrosion resistant
Hydraulic Trash Rake Arm joints, cylinder connections Heavy load, impact, repetitive Bronze + Graphite Plug Low friction, anti-seizure
Mechanical Rotary Screen Drum support Continuous duty, wastewater sand Polymer Composite Abrasion resistant, long life
Penstock Shaft, support points High water pressure, frequent use Aluminum Bronze (C95500, C63000) Withstand pressure shock
Stop Log Lifting lugs, guide supports Intermittent, high static load Bronze + Solid Lubricants Stable, deformation-free
Logboom Chain joints, float pivots Floating in water, wave impact Stainless + Composite Corrosion & seawater resistant

Frequently Asked Questions (FAQ)

Q1: Why are oilless bearings better than traditional bearings in water infrastructure?
A1: Oilless bearings eliminate the need for grease, resist corrosion, and prevent lubricant leakage into water — making them more reliable and environmentally friendly.

Q2: Which materials are best for underwater self-lubricating bearings?
A2: Bronze alloys with graphite plugs, polymer composites, and stainless steel + PTFE composites are the most commonly used materials depending on load and speed.

Q3: Can oilless bearings handle heavy shock loads in flood gates?
A3: Yes, manganese bronze and aluminum bronze bushings with solid lubricants are designed for high load and impact resistance.

Oilless bush bearings play a vital role in ensuring the efficiency, durability, and reliability of water infrastructure systems. By choosing the right material — from bronze alloys for heavy loads to polymer composites for sand resistance — engineers can significantly reduce downtime, cut maintenance costs, and extend the service life of critical water management equipment.

Custom CNC Oil-free Bearing Solutions

Custom Oil-Less Bearing Bushing

Self-lubricating bearing selection and drawing confirmation