A904 Excavator Bearing

A904 Excavator Bearing – Precision Slewing Ring for Heavy-Duty Applications

Product Details

When your excavator operates in challenging environments, you need a bearing solution that delivers. The A904 Excavator Bearing is engineered for reliable performance in demanding conditions. Manufactured from 50Mn high-strength alloy steel, this slewing ring features advanced tooth quenching and enhanced dust seals to withstand arid, dusty environments common in Central Asia and similar regions. Whether you're operating a Hyundai R220LC or Komatsu PC200, this product provides the durability and stability your equipment requires for continuous operation.

Our single-row, four-point contact ball bearing design optimizes load distribution while maintaining a compact profile. The raceway undergoes medium-frequency induction quenching to achieve HRC 55-60 surface hardness, ensuring exceptional resistance to wear and rolling contact fatigue. With dimensions of 1180×72mm, the product fits seamlessly into your excavator's swing mechanism, enabling smooth 360-degree rotation under heavy loads.

Why Choose Us?

ISO 9001 Certified Manufacturing Excellence

Located in Luoyang, China's bearing industry hub, we bring over 20 years of technical expertise to every product. Our facility houses CNC vertical lathes, quenching machines, Gear shapers, and grinding equipment that ensure consistent quality.

Engineering-Driven Customization

Our 50-member R&D team provides technical consultation, product design, and personalized solutions. We handle old product mapping and non-standard customization based on your 3D drawings or specifications.

Proven Global Track Record

We've supplied precision bearings to customers in over 50 countries, including the United States, Germany, Australia, and throughout the Middle East. Our products meet DIN, ISO, and GB international standards.

Full Process Quality Control

From raw material inspection to finished product testing, we maintain strict traceability. Every bearing undergoes coordinate measurement, vibration testing, and load verification before shipment.

Certification

Technical Specifications

Features and Benefits

High-Strength Alloy Construction

The 50Mn material provides superior tensile strength compared to standard carbon steel. This translates to longer service life in high-impact digging operations and reduced downtime.

Advanced Surface Hardening

Medium-frequency induction quenching creates a hardened layer that resists brinelling and surface fatigue. Your A904 Excavator Bearing maintains smooth rotation even after thousands of operating hours.

Improved Sealing System

Multi-lip seals with labyrinth features effectively block dust, sand, and moisture ingress. This protection is critical when operating in mining, quarrying, or desert construction sites.

Four-Point Contact Design

The Gothic-arc raceway geometry allows each ball to carry loads from multiple directions simultaneously. This design maximizes load capacity while minimizing axial height.Optimized Equip Interface

Internal gear teeth hardened to HRC 45-50 adjust wear resistance with affect sturdiness. The adapt won't chip or split beneath stun loads from sudden boom movements.

Precision Cage Technology

Nylon 66 cages keep up uniform ball dividing, decrease contact, and withstand tall centrifugal strengths amid quick slewing movements.

Applications

Excavator Models

Hyundai R220LC, Komatsu PC200, and equivalent 20-25 ton excavators with similar swing bearing requirements.

Operating Environments

· Mining and quarrying operations

· Desert construction projects

· Agricultural land development

· Infrastructure construction in arid regions

· Material handling in dusty industrial sites

Load Conditions

Suitable for standard to heavy-duty burrowing cycles with combined axial, radial, and tilting moment loads typical of mid-size excavator applications.

Technical Specifications

Our fabricating handle takes after strict quality protocols:

Material Assessment: Unearthly examination confirms amalgam composition some time recently machining

Dimensional Confirmation: Arrange measuring machines check basic tolerances

Hardness Testing: Rockwell testing affirms warm treatment effectiveness

Raceway Geometry: Profile estimation guarantees legitimate ball contact angles

Gear Quality: Pitch exactness and tooth profile confirmed per Noise standards

Assembly Testing: Revolution torque and pivotal play measured on each unit

Load Testing: Test units experience inactive and energetic stack verification

We comply with ISO 9001:2015 quality administration benchmarks and RoHS orders for fabric security.

Installation Guide

Pre-Installation Checks

Verify mounting surface flatness within 0.5 mm across the bolt circle. Clean all surfaces of dirt, paint, and corrosion. Inspect bolt holes for damage or elongation.

Mounting Procedure

1. Apply anti-seize compound to bolt threads and contact surfaces

2. Position the bearing with the lubrication fitting accessible for maintenance

3. Install bolts hand-tight in a star pattern to ensure even seating

4. Torque bolts progressively in three stages to the specified value (consult your equipment manual)

5. Perform a final torque check after initial operation (100-500 hours)

Initial Lubrication

Inject grease through all fittings until fresh lubricant appears at the seal gap. Rotate the bearing several full revolutions to distribute grease evenly across the raceway.

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).

Positive customer reviews

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

Maintenance and Care

Jolt Assessment Schedule

Check jolt pre-tension after the to begin with 100-500 working hours, at that point each 1000 hours from that point. Retighten to determination if extricating is detected.

Lubrication Intervals

Add oil each 50 operating hours or week after week in dusty conditions. Proceed pumping until new oil cleanses ancient grease from the seals.

Operational Monitoring

Listen for bizarre clamor amid revolution. Pounding or clicking sounds demonstrate defilement or bearing harm requiring quick inspection.

Storage Recommendations

Store heading evenly on level surfaces. Never lift by a single point, as this may misshape the ring and compromise raceway geometry.

Load Management

Avoid persistent operation past appraised capacity. Over-burdening causes raceway brinelling and untimely wear that cannot be turned around.

Customer Reviews

"We've been running these bearings in our Komatsu PC200 fleet for two years across three desert job sites. The enhanced sealing really does make a difference in dusty conditions. Maintenance intervals are holding up as specified."

— Operations Manager, Construction Company, UAE

"The technical support team helped us select the right specifications for our specific application. Delivery was prompt, and the bearing fit perfectly without any modification needed."

— Procurement Engineer, Mining Equipment Service Provider, Australia

FAQ

Q: What makes this bearing appropriate for dusty environments?

A: The multi-lip NBR seals with maze plan make different obstructions against tidy entrance. The seal geometry effectively squares particles whereas permitting oil cleansing amid maintenance.

Q: Can you customize measurements for other excavator models?

A: Yes. Our machining extend covers 50-10,000 mm distance across. Give your dimensional necessities or unique bearing determinations, and our designing group will plan a solution.

Q: What is the anticipated benefit life?

A: Benefit life depends on working conditions and support compliance. Beneath ordinary conditions with appropriate grease and jolt support, anticipate 8,000-12,000 working hours some time recently substitution consideration.

Q: Do you give establishment support?

A: We offer establishment direction documentation with each arrange. For huge ventures, our engineers can give farther specialized meeting amid installation.

Q: What exactness grades are available?

A: We fabricate P0, P6, P5, and P4 accuracy grades. P0 is standard for excavator applications. Higher accuracy grades are accessible for specialized requirements.

Q: How do I confirm the adjust torque detail for mounting bolts?

A: Torque values depend on jolt measure and review. We give suggested details with each bearing. Continuously cross-reference with your excavator manufacturer's benefit manual.

Contact Us

Need technical assistance or a A904 Excavator Bearing solution? Our engineering team is ready to help. Reach out mia@hgb-bearing.com for quotations, technical specifications, or application support.