Bridge Scraper Slewing Bearing

Bridge Scraper Slewing Bearing – Corrosion-Resistant Rotating Solution for Water Treatment

Luoyang Hengguan Bearing Technology provides professional bridge scraper Slewing Bearings engineered for demanding water treatment and marine environments. This single-row four-point contact ball bridge scraper slewing bearing features dimensions of 2152 × 1922 × 67 mm. It adopts advanced surface oxidation and blackening treatment to achieve 3 times higher corrosion resistance.Made of high‑strength 50Mn / 42CrMo alloy steel, with GCr15SiMn steel rolling elements, it meets C5‑M anti‑corrosion standards and IP67 sealing protection. Available in precision grades P0, P6, P5 and P4, with a diameter range from 50 mm to 10,000 mm. Our bridge scraper slewing bearings ensure stable rotation under high axial loads, radial forces and tilting moments in harsh corrosive conditions。

Bridge Scraper Slewing Bearing Details

Your product serves as the mechanical center of bridge-style clarifiers and thickeners. It handles synchronous loads while rotating scraper arms to efficiently remove sludge from tank bottoms.

Structure:

Single-row, four-point contact ball design distributes loads evenly across the raceway. This structure minimizes stress concentration during continuous rotation.

Working Principle:

The bearing supports the scraper bridge’s rotation while managing axial thrust from sludge accumulation and radial forces from arm load. Hardened raceways (55–62 HRC, hardening depth 3.5–5.0 mm) maintain low friction under continuous operation.

Performance Advantage:

Professional surface oxidation treatment forms a dense protective film, extending the service life of bridge scraper slewing bearings by 3 times in saltwater and H₂S environments. Multi-lip NBR seals prevent moisture ingress and maintain stable lubrication during 24/7 continuous operation.

Why Choose Us

Manufacturing Capability:

You benefit from our 20 years of slewing bearing industry experience. Our workshop houses CNC vertical lathes, CNC quenching machines, CNC Gear shapers, and grinding equipment. We process bearings from 50 mm to 10,000 mm diameter with precision control over P0 to P4 grades.

Customization Support:

Your unique necessities receive dedicated engineering attention. We provide technical consultation, product design, old product mapping, and non-standard customization. Even without 3D drawings, our team works with your specifications.

Global Trust:

Our ISO 9001-certified items reach over 50 nations, including the United States, Germany, Australia, and the Middle East. RoHS compliance ensures environmental responsibility.

Quality Control:

Every bearing undergoes dimensional measuring, vibration testing, and life cycle testing. Full traceability from raw material to shipment ensures consistency.

Technical Specifications

Features and Benefits

Corrosion Protection:

The oxidation-blackening process forms a dense oxide layer. It delivers over 1,000 hours of salt spray resistance, protecting internal components in desalination and sewage treatment plants.

Load Management:

Four-point contact design handles combined axial, radial and tilting moments. This prevents premature failure caused by uneven load distribution on long scraper arms.

Dimensional Stability:

Low-temperature surface treatment avoids thermal deformation. The bearing maintains accurate dimensions throughout its service life, ensuring smooth rotation without vibration.

Maintenance Efficiency:

IP67 sealing keeps contaminants out while retaining lubricant. This extends maintenance intervals and reduces your total cost of ownership.

Environmental Compatibility:

RoHS-compliant materials and eco-friendly surface treatment comply with global environmental regulations. It ensures reliable operation without sacrificing performance

Applications

Desalination Plants:

You need reliable rotation in reverse osmosis units and seawater pretreatment equipment. Our bearing withstands saltwater exposure while maintaining low torque in concentrate discharge systems.

Wastewater Treatment:

Bridge scraper slewing bearing supports center-drive and peripheral-drive clarifiers. In aeration tanks and sedimentation basins, it handles continuous operation under H2S gases and high humidity.

Mining Thickeners:

Heavy sludge handling demands high static load capacity. Our bearings manage the tilting moment of scraper arms loaded with mineral concentrate, ensuring precise rotation during 24/7 operations.

Chemical Processing:

Sedimentation tanks for chemical separation benefit from rotational accuracy under temperature gradients. The corrosion-resistant design handles aggressive chemical exposure.

Water Conservancy Projects:

Marine environmental protection equipment and hydraulic structures require long-term stability. Our bearing delivers consistent performance in fluctuating water levels and corrosive conditions.

Installation Guide

Pre-Installation Inspection:

Check the mounting surface for flatness and cleanliness. Verify that bolt holes align with the bearing's bolt circle. Inspect the bearing for any shipping damage.

Surface Preparation:

Clean mating surfaces thoroughly. Remove rust, paint, and debris. Apply a thin coat of anti-seize compound to prevent galvanic corrosion between dissimilar metals.

Positioning:

Lift the bearing using appropriate rigging. Align bolt holes carefully. Avoid forcing the bearing into position, which can damage raceways.

Bolt Tightening:

Use a calibrated torque wrench. Tighten bolts in a star pattern to ensure even load distribution. Follow the torque specifications based on your bolt grade and size.

Gear Meshing (if applicable):

Check backlash between the bearing's gear and drive pinion. Adjust pinion position to achieve the recommended backlash range. This prevents excessive wear during operation.

Lubrication:

Fill grease channels through designated ports. Use the recommended grease type for your operating environment. Avoid over-greasing, which can increase friction.

Exhibition

We attend many famous international exhibitions such as Shanghai International Maritime Exhibition,Mining World Russia, bauma China, CTT Russia, etc

Partners

Your trust, we cherish in heart all times and will reciprocate that trust with unwavering quality.

Packaging & shipping

Your goods are unique, and their journey should be flawless. Therefore, we offer professional and customized packaging services. Our experienced team will evaluate your goods' characteristics, transportation route, and environmental requirements to recommend the most secure solution, such as: wooden crate packaging, sturdy frame packaging, or composite reinforced packaging (wooden crate + iron frame).

Maintenance and Care

Lubrication Schedule:

Relubricate every 200-500 operating hours depending on load and environment. Use lithium-based grease with EP additives for corrosive conditions. Monitor grease condition during relubrication.

Inspection Routine:

Check for abnormal noise or vibration monthly. Inspect seals for cracks or wear. Verify that mounting bolts maintain proper torque. Catching issues early prevents costly downtime.

Corrosion Monitoring:

In marine environments, inspect the oxidized surface annually. Clean salt deposits with fresh water. Touch up any damaged areas with compatible corrosion-resistant coatings.

Storage Guidelines:

Store unused bearings in a dry, temperature-controlled environment. Keep the original packaging intact. Apply a rust preventive oil if storage exceeds six months.

Positive customer reviews

Our quality and service have received widespread praise from our customers.

FAQ

Q: What load capacity does this bearing support?

A: Load capacity depends on your specific dimensions and configuration. Our engineers calculate static and dynamic load ratings based on your application parameters. Contact Us with your requirements for precise specifications.

Q: Can you customize dimensions beyond 2152 mm diameter?

A: Yes. We manufacture bearings from 50 mm to 10,000 mm diameter. Share your dimensional requirements, and we'll provide a custom solution.

Q: How does the oxidation treatment compare to zinc plating?

A: Oxidation-blackening provides superior corrosion resistance in marine environments. It maintains dimensional accuracy better than thick zinc coatings, which can affect tolerances.

Q: What precision grade should I choose?

A: P0 grade suits most standard applications. Choose P6 or P5 for improved rotational accuracy. P4 grade is recommended when minimizing runout is critical.

Q: Do you provide installation support?

A: Yes. We offer installation guidance and technical consultation. Our engineers assist with mounting procedures and troubleshooting during commissioning.

Q: What is the typical lead time for custom bearings?

A: Standard sizes ship within 2-3 weeks. Custom bearings require 4-8 weeks depending on complexity. Contact us for specific delivery schedules.

Contact Us

Ready to improve your water treatment equipment reliability? Our engineering team is here to discuss your bridge scraper slewing bearing requirements. Reach us at mia@hgb-bearing.com for technical consultation and quotations.