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Sprocket

Heavy-Duty Excavator & Dozer Sprockets & Segments

Welcome to our Sprocket Category at Shengan Excavator Parts. We manufacture OEM-grade drive sprockets, sprocket rims, and bolt-on segments engineered for crawler excavators and bulldozers including Cat, Komatsu, MITSUBISHI, and Hitachi. Precision-cast from high-tensile alloy steel and deep-induction hardened, our sprockets ensure smooth track engagement, minimal pitch wear, and maximum drive torque under severe jobsite conditions.

Get a Fast Factory-Direct Quote with your machinery model or OEM part number to receive instant factory pricing, technical CAD drawings, and worldwide shipping terms!

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High-Torque Drive Sprockets & Replacement Segments for Global Fleets

Unlike Front Idler that merely guide the track, the drive sprocket endures continuous high-torque impact, converting the final drive's rotational power into linear crawler propulsion. Improper tooth geometry or inadequate root hardness leads to track chain jumping, accelerated bushing wear, and costly drive motor strain. Shengan engineers heavy-duty sprockets and segments specifically calibrated to absorb extreme cyclic loads across quarrying, mining, and heavy demolition jobsites.

Sprocket Engineering & Drive Mechanism Comparison

Selecting between a single-piece cast sprocket and bolt-on segment groups depends on your machine size, ground conditions, and field service requirements:

Drive Assembly Type Structural Metallurgy Key Engineering Advantage Target Application
Solid Monoblock Sprocket High-density cast 35SiMn steel Maximum rigidity with zero bolt-loosening risks Standard excavators (1–50 Tons)
Bolt-On Sprocket Segments Forged alloy steel (40Cr / 35CrMo) Quick field replacement without breaking track chains Heavy bulldozers (Cat D6–D11, Shantui SD16–SD32)
Weld-On Sprocket Ring High-weldability forged alloy steel Cost-effective rim rebuilding on worn final drive hubs Large mining excavators (50–90+ Tons)

Precision Pitch Alignment for Cat, Komatsu & Global OEM Fleets

A primary cause of premature undercarriage wear is a pitch mismatch between sprocket teeth and track pin bushings. Shengan excavator sprocket utilizes CNC gear hobbing to guarantee 100% pitch circle diameter (PCD) precision:

Machinery Brand Compatible Models Specific Pitch & Mounting Advantage
Caterpillar (Cat) Cat 320, 330, 336, 349 / D6, D7, D8, D9 CNC-milled bolt circles matching Cat final drive flange patterns
Komatsu PC200, PC300, PC400 / D65, D85, D155, D275 Contoured tooth roots engineered to prevent chain binding in mud
Shantui Shantui SD16, SD22, SD32 bulldozers High-impact forged segments built for severe rock and gravel pushing
Volvo & Hitachi EC210, EC290, EC380 / ZX200, ZX330, ZX450 Factory-direct aftermarket rims backed by full structural warranty

Specialized Heat Treatment against Tooth Shear & Root Fatigue

Sprocket teeth experience intense sliding friction against abrasive soil and steel bushings. Shengan China sprocket manufacturers undergoes targeted zone hardening:

  • Progressive Tooth Hardening: Sprocket teeth profile and root pockets are induction-hardened to HRC 52–58 with an effective depth of 7–12mm, preventing tip flattening and root gouging.

  • Tough Center Core: The inner hub and bolt hole zones retain a ductile, shock-absorbing core (HRC 28–32) to prevent brittle cracking during high-torque machine maneuvers.

  • Shear-Resistant Bolt Holes: Precision-reamed mounting holes ensure full thread contact and uniform bolt tensioning, eliminating sheared hub bolts under heavy digging loads.

Fast Global Supply & Quality Inspection

Why machinery dealers, rental fleets, and repair workshops trust Shengan:

  • 100% CMM & Hardness Testing: Every batch is tested for tooth profile accuracy, pitch symmetry, and Rockwell hardness depth before shipping.

  • Direct Factory Value: Factory-direct manufacturing removes trading margins, ensuring high profit margins for aftermarket parts distributors.

  • Ocean-Ready Packaging: Coated in heavy-duty anti-rust oil, wrapped in shrink film, and secured on reinforced steel-frame pallets.

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