Other General Parts/Swing Circles

Products & Range Coverage
A&S MACHINERY CO., LTD. delivers an extensive inventory of specialized swing circles within our Other General Parts catalog to support diverse heavy-duty equipment. Our product lineup covers a broad range of machine series and slewing transmission configurations, ensuring that every component meets rigorous Komatsu standards for rotational control and preventive maintenance:
• Machine & Heavy-Duty Swing Circle Compatibility: Engineered for a broad range of Komatsu heavy-duty equipment, our products ensure exact material hardness ratings, dimensional tolerances, and bolt pattern interfaces for a 100% perfect match, rapid replacement, and factory-grade performance.
• Complete Heavy-Duty Swing Circle Range: 1. Swing Circle Assemblies: Designed to withstand high-frequency start-stops and massive axial and radial combined loads for primary slewing units; 2. Swing Pinion Gears: Formulated for high wear resistance with precision carburizing and quenching treatments to mesh smoothly with gear rims; 3. High-Tensile Bolts & Sealing Kits: Satisfying secure fastening under extreme shear stresses while blocking mine dust and moisture ingress into the raceway.
• OEM & Heavy-Duty Aftermarket: We offer certified original equipment manufacturer Komatsu swing circle assemblies alongside rigorous high-performance aftermarket alternatives featuring deep-quenched raceway hardening, delivering exceptional operational reliability and extended service lifespan at a cost-effective procurement point for global clients.

Supply Chain & Logistics
We maintain a robust operational infrastructure designed to support global slewing component procurement through direct supply channels, delivering reliable stock availability and rapid dispatch to build trust with international equipment owners and repair facilities.
• Massive Inventory and Cross-Reference: We maintain large-volume stock of hundreds of swing circle assemblies matching Komatsu mainstream medium and large excavators. Backed by barcode-enabled intelligent warehousing and Komatsu cross-reference databases, we guarantee precise matching and immediate dispatch upon order confirmation to fulfill routine maintenance and rapid replenishment needs for overseas fleet workshops and minimize equipment downtime caused by sudden ring gear tooth breakage or seizure halting complete machine operations.
• Anti-Rust Sealing and Edge Protection: We implement specialized industrial packaging standards for precision-machined slewing ring mounting faces, raceways, and gear surfaces utilizing heavy-duty long-lasting anti-rust oils, thick industrial bubble wrap, and multi-layer wrapping films, while custom anti-collision solid wood edge protectors are installed along outer circumferences to ensure zero metal oxidation or tooth contact damage during transcontinental ocean freight under salt spray and high humidity environments.
• Heavy-Duty Crated Protection: Bulk heavy-duty swing circle shipments are packed in high-strength export fumigated wooden crates with internal cross-braced timber blocks and high-strength bolts suspending the ring off the container floor to guarantee absolute safety during long-distance transcontinental transport under extreme cargo handling jolts without deformation.
• Consolidated Sourcing for Swing Circle Overhaul Kits: We support overseas clients by consolidating large swing circles alongside matching full sets of high-tensile mounting bolts, swing pinion gears, and extreme-pressure greases for severe working conditions into precise bundled full-set swing system maintenance kits, achieving a one-stop purchasing model that pairs slewing system service supplies while significantly reducing comprehensive logistics costs for overseas workshops.

Engineering Solutions & Technical Support
Our technical framework focuses on resolving field-level operational challenges to eliminate equipment downtime, moving beyond simple parts distribution to deliver comprehensive engineering and service capabilities for asset health monitoring reliability.
• Application-Specific Swing Durability Solutions: We address extreme jobsite challenges—such as heavy rock blasting and continuous wide-angle swing excavation—where original slewing rings suffer raceway indentation, roller fracture, and gear rim spalling under eccentric shock loads. We also provide professional engineering upgrades utilizing deep induction hardening processes, optimized raceway curvature radii, and enhanced impact fatigue resistance.
• Troubleshooting and Maintenance Guidelines: We provide professional diagnostic guidance for issues like abnormal slewing noises, boom tip play, or stuttering. This focuses on two critical protocols: 1. Clearance Measurement & Multi-Point Greasing: Technicians must use dial indicators to check axial play and replace rings when limits are exceeded, while injecting high-temperature extreme-pressure lithium-base grease every 50 hours across multiple ports to purge contaminated metal debris; 2. Single-Use Bolt Replacement & Pre-Tightening: Service technicians must replace 100% of mounting bolts with brand-new Grade 10.9 or 12.9 high-tensile bolts, following official staged cross-pattern torque and angle methods while strictly prohibiting reusing old bolts to prevent shear failure.
• Expert Technical Support & Safety Guidelines: We provide comprehensive documentation, including swing circle lifting balance point diagrams, soft-band positioning installation specifications, bolt torque comparison tables, and noise troubleshooting visual guides, assisting overseas technical personnel in executing standardized construction.

Call to Action & User Experience
Optimize your machinery slewing reliability and maintenance efficiency today by utilizing our interactive tools placed across strategic positions on our platform.
• Multi-Dimensional Intelligent Search and Specification Filtering: Benefit from advanced search functions supporting fast product filtering by Komatsu machine model (such as PC200-8, PC360-7, PC400-8, or PC800-8), product categories (such as swing circle assemblies, pinion gears, mounting bolts, or swing system general parts), or original equipment manufacturer part numbers to lock onto target products instantly.
• RFQ and Swing Circle Fleet Quotation: Access our fast-response interactive channels providing one-click bill of materials uploads for fleet Komatsu machinery slewing system overhaul lists, including swing circle assemblies, pinion gears, high-tensile bolt sets, and dedicated greases, to receive bundled assembly quotations and international logistics freight estimates, fulfilling workshop routine overhauls and extreme condition spare parts reserve procurement requirements.
• Consultation and Support: Utilize our around-the-clock professional technical support channels staffed by senior Komatsu machinery slewing transmission and chassis structure experts to assist overseas clients in verifying non-standard swing circle bolt hole pitches and tooth counts, designing customized slewing reinforcement plans for extreme mining environments, and troubleshooting complex slewing noise faults, ensuring cross-border procurement runs error-free.