Power your Sumitomo LS118 series crawler crane with our Durable LS118 Chain Sprocket (Drive Tumbler), a heavy-duty aftermarket replacement engineered to transmit hydraulic travel motor power to the track system with precision and reliability. As a critical undercarriage component, the sprocket engages the track shoe to drive your crane forward or backward — and our LS118 sprocket is built to do exactly that, shift after shift, in the harshest job site conditions.
Key Specifications:
- Compatible Models: Sumitomo LS118, LS118RH3, LS118RH5, LS118RM; Link-Belt LS118 series crawler cranes
- Type: Bolted or splined drive tumbler / chain sprocket (confirmed by your crane configuration)
- Material: High-strength 35SiMn alloy steel; optional 35SiMnMo, 28CrMnMo, SCSiMn2H, ZG40Mn2, 42CrMo4V for high-spec applications
- Manufacturing Process: Precision casting → machining → gear quenching / whole quenching & tempering → surface hardening
- Surface Hardness: HRC 52–56 (standard 35SiMn); up to HRC 58–62 with 10–12 mm case depth for premium 42CrMo4V configuration
- Quenching Depth: 5–8 mm (standard); 10–12 mm (deep-hardened premium spec)
- Color: Black (custom colors available)
- Certification: ISO 9001
- Warranty: 2,000–2,500 working hours or 12 months (whichever comes first)
- Customization: Bolted and splined types available; manufactured to your crane model, drawings, or samples (OEM/ODM supported)
How the LS118 Sprocket Works:
The sprocket is typically located at the rear of the crawler crane travel device. Power from the hydraulic travel motor and gears is transmitted through the sprocket to the track chain, driving the entire crane forward or backward . The sprocket’s teeth must mesh precisely with the track shoe pitch — ensuring stable power transmission and maintaining proper engagement even as the track chain elongates due to pin wear over time .
Why Choose Our LS118 Sprocket?
💡 Casting + Quenching = Long-Life Teeth: Our LS118 sprocket undergoes integral casting followed by whole quenching and tempering, then surface hardening. This process delivers HRC 52–56 tooth hardness with 5–8 mm quenching depth — giving the teeth exceptional wear resistance while maintaining a tough, impact-resistant core .
- Precision Tooth Profile: Teeth are precisely machined to match the LS118 track shoe pitch (205 mm pitch OEM track links), ensuring smooth engagement, minimal wear, and stable transmission throughout the crane’s travel .
- Stable Meshing Under Track Elongation: Even as track pins wear and the chain elongates, our sprocket maintains solid engagement with the track shoes — preventing slippage, mistracking, and uneven wear .
- Two Mounting Configurations: Available in both bolted and splined types. Share your crane model and we’ll confirm the exact configuration for your LS118 — no guesswork, no fitment issues .
- Heavy-Duty Load Capacity: Engineered for 80-ton class crawler cranes, withstanding the high torque, heavy loads, and abrasive stresses of construction, mining, and heavy-lift operations .
- Factory-Direct Value: Source straight from our production line — genuine-level OEM quality at a competitive aftermarket price, with no dealer markup.
- One-Stop Undercarriage Solution: We also supply track rollers (top & bottom), idlers, track shoes, track chains, and recoil spring assemblies for the LS118 and 150+ other crawler crane models .
- Proven Global Track Record: Our undercarriage parts are exported to dealers and end-users across 30+ countries, earning trust for low maintenance and operational stability .
Applications:
Designed for Sumitomo LS118 / Link-Belt LS118 series crawler cranes operating in heavy construction, bridge building, wind farm installation, petrochemical plant erection, port cargo handling, mining, and large-scale infrastructure projects. Whether your crane is lifting steel structures, setting precast concrete, or traversing challenging terrain under load, our LS118 sprocket delivers the reliable power transmission your undercarriage depends on.
Compatible Crane Models:
- Sumitomo LS118, LS118RH3, LS118RH5, LS118RM
- Link-Belt LS118 series
- 80-ton class lattice boom crawler cranes (confirm fitment by serial number)
Maintenance Tips for Maximum Sprocket Life:
⚠️ Extend Your Sprocket’s Service Life: Keep proper track shoe tension — excessive tension stretches track pitch and causes abnormal sprocket wear. Regularly inspect and re-torque sprocket bolts and propel reducer mounting hardware. Loose bolts cause abnormal mating surface wear, drastically shortening sprocket and bolt life .
Quality Assurance:
- ISO 9001 certified manufacturing with 20+ years of undercarriage parts expertise
- Material verification — 35SiMn / 35SiMnMo alloy steel meets international standards
- Heat treatment control — whole quenching & tempering + surface hardening ensures HRC 52–56 tooth hardness
- 100% pre-shipment inspection — dimensional accuracy, tooth profile, and bolt-hole pattern verified
- Export-grade packaging — plywood pallet or seaworthy wooden case for safe worldwide transport
Ordering & Support:
- MOQ: 1 piece
- Lead Time: 7 days if in stock; 15–20 days for standard production; 20–50 days for custom/bulk orders
- Payment: T/T, L/C, Western Union
- Trade Terms: EXW, FOB, CFR, CIF
- Fitment Verification: LS118 sprocket configuration varies by sub-model (LS118RH3 vs LS118RH5) and mounting type (bolted vs splined). Share your crane’s model, serial number, or existing sprocket part number — or send photos/drawings — and our engineering team will confirm the exact match before shipment .
Order Your Durable LS118 Crawler Crane Sprocket Today!
Don’t let a worn sprocket compromise your crane’s mobility and power transmission. A failing drive tumbler can cause track slippage, accelerated track shoe wear, and costly downtime on critical lift projects. Contact us for a competitive factory-direct quote, or add to cart now. We respond to all inquiries within 24 hours and ship worldwide.
+86 1588 0208980
doozer@doozergroup.com
