AC200 Crane Slewing Bearing

AC200 Crane Slewing Bearing - Premium Quality Solution for Heavy-Duty Applications

The AC200 crane Slewing Bearing from Luoyang Hengguan Bearing Technology is engineered for 200-ton all-terrain cranes operating in harsh conditions. Made of aviation-grade 42CrMo alloy steel, this single-row four-point contact ball slewing bearing delivers excellent impact resistance and extended service life. With overall dimensions of 2044×125mm and surface hardness reaching 55-62 HRC via induction hardening, it withstands massive axial, radial and tilting moments simultaneously. Our bearing features advanced tooth surface hardening and multiple sealing systems to prevent dust and moisture ingress. Backed by ISO 9001 certification and over 20 years of manufacturing experience, we provide precision grades ranging from P0 to P4. Our products have been successfully exported to more than 50 countries, including the UAE and other Middle Eastern markets.

AC200 Crane Slewing Bearing Details

This slewing bearing acts as the core rotating connection between the crane’s chassis and superstructure. The four-point contact ball structure distributes loads evenly across the raceway. Heat-treated GCr15SiMn steel balls operate within precision-ground raceways, maintaining smooth rotation even under eccentric loads during wind turbine installation and bridge engineering construction.

42CrMo Forged steel offers superior fatigue strength compared with ordinary carbon steel. Our induction hardening process forms a 3-5mm hardened layer, greatly extending service life under high-cycle working conditions. Internal and external Gear options are available to match different AC200 crane chassis models.Dual NBR or Viton sealing rings effectively block contamination in harsh working environments. This optimized structure reduces maintenance frequency and avoids premature wear caused by abrasive particles.

Why Choose Us

Manufacturing Accuracy: Our CNC vertical lathes and gear shapers process slewing bearings with an outer diameter ranging from 50mm to 10000mm, with dimensional tolerances compliant with ISO Class 6 standards.

Material Traceability: Every component undergoes dimensional inspection and vibration testing. We provide EN 10204 3.1 material certificates documenting steel chemical composition and heat treatment parameters.

Customization Capability:Beyond standard dimensions, we offer reverse engineering for worn bearings and develop custom non-standard replacements with complete 3D drawing support.

Global Benefit Organize: Our products are exported to Germany, Australia, Russia and more than 50 countries worldwide. Our engineers provide on-site installation guidance tailored to your language and time zone.

Rapid Reaction: Sufficient standard stock enables quick delivery for urgent replacement orders. Bulk orders are prioritized with dedicated production lines.

Technical Specifications

Testing & Certification

Every slewing bearing undergoes comprehensive quality testing using advanced equipment:

• Coordinate Measuring Machines verify dimensional accuracy.
• Vibration Testing confirms smooth rotation characteristics.
• Hardness Testing ensures proper heat treatment effects.
• Gear Inspection validates the precision of the slewing ring gear.
• Life Testing validates durability under simulated operating conditions.
• Material Certification provides full material traceability.

ISO 9001 certification and RoHS-compliant materials ensure your slewing ring meets international quality standards.

Features and Benefits

High-Alloy Development:42CrMo steel incorporates chromium and molybdenum to enhance toughness and prevent cracking under shock loads during emergency stops.

Induction-Hardened Raceways: Deep hardened surfaces resist surface fatigue. It maintains stable rotational performance for over 10,000 duty cycles with no measurable raceway deformation.

Four-Point Contact Structure: This design eliminates the need for separate thrust and radial bearings. It reduces the overall crane height and simplifies maintenance.

Advanced Sealing: Multi-lip seals block fine cement dust and sand ingress commonly found in Middle Eastern construction sites, extending lubrication intervals by 30% versus single-seal structures.

Precision Machining: CNC machining ensures smooth motion transmission with minimal backlash, reducing vibration and operator fatigue during 360° slewing.

Applications

Tower Cranes: Supports continuous slewing for high-rise construction, where vertical space constraints require compact slewing bearing designs for AC200 cranes.

Port Apparatus: Withstands frequent load cycling for container handling equipment exposed to salt spray and extreme temperature changes.

Marine Engineering: Resists corrosion for offshore platform cranes with premium seal materials and anti-corrosion coatings.

Mining Equipment: Resists abrasive particle contamination for excavators and dragline cranes operating in open-pit mines.

All-Terrain Cranes: Specially adapted to 200-ton Demag/Terex AC200 chassis, ideal for wind turbine installation and foundation projects across the UAE and Gulf regions.

Installation Guide

Pre-Installation Checks: Inspect mounting surfaces for levelness within a 0.5 mm tolerance. Remove protective coatings with non-chlorinated solvents.

Alignment: Position the bearing to ensure gear teeth mesh with the pinion at the specified center distance. Use feeler gauges to verify gear backlash in accordance with the crane manual (typically 0.2–0.4 mm).

Bolt Torque: Tighten mounting bolts in a crisscross pattern to the manufacturer’s specified torque value. Retighten all bolts after the first 50 operating hours as connections settle.

Initial Lubrication: Grease fittings with NLGI Grade 2 lithium complex grease until fresh lubricant purges from the seals. This ensures full raceway coverage before load operation.

Maintenance and Care

Lubrication Schedule: Apply grease to raceway fittings every 100 working hours under heavy-duty conditions. Inspect gear lubrication every 200 hours, and replenish grease at all gear meshing points.

Wear Monitoring: Measure axial play monthly with dial indicators at four equidistant points. If play exceeds 2 mm or increases suddenly, arrange an inspection for raceway wear.

Seal Inspection: Check for lubricant leakage or hardened seals every quarter. Replace seals immediately if contamination is found in discharged grease.

Bolt Inspection: Verify mounting bolt torque every 500 hours. Loose bolts cause abnormal wear and accelerate fatigue failure.

Contamination Prevention: Clean the bearing exterior after operation in dusty environments. High-pressure washing must avoid direct spraying on seals to prevent water ingress.

Exhibition

We participate in well-known international exhibitions, including 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).

FAQ

Q: What is the recommended lubrication interval for the product?

A: Grease the raceway every 100 operating hours in heavy-duty applications. Inspect and lubricate gears every 200 hours to prevent metal-to-metal contact.

Q: How can I identify if my bearing needs replacement?

A: Monitor axial play with dial indicators. If it exceeds 2mm (or your manual's limit), or if metallic particles appear in discharge grease, replacement is required.

Q: Can this bearing be repaired instead of replaced?

A: Yes, if the forging remains intact. Raceways can be reground and fitted with oversized balls. However, new bearings are recommended for safety-critical 200-ton applications.

Q: Does your AC200 bearing use internal or external gears?

A: Most AC200 configurations use internal gears to protect teeth from debris and reduce chassis dimensions. We manufacture both variants to match your specific model.

Q: What is your production lead time for custom dimensions?

A: Standard modifications require 4-6 weeks. Complex non-standard designs may extend to 8-10 weeks depending on forging availability and heat treatment scheduling.

Q: Do you provide installation support for international customers?

A: Yes. Our engineers offer remote video guidance and can arrange on-site commissioning for large projects in your region.

Contact Us

Need technical specifications or a custom solution? Reach out to our AC200 crane slewing bearing specialists at mia@hgb-bearing.com for prompt engineering support and quotations.