Keep your Hitachi KH125 series crawler crane moving with our KH125 Drive Sprocket (Drive Tumbler), a heavy-duty aftermarket replacement engineered to meet OEM specifications for 30–35 ton class Hitachi lattice boom crawler cranes . As a core undercarriage component, the sprocket engages directly with the track chain to convert hydraulic travel motor torque into smooth, controlled machine movement — ensuring reliable travel and stable positioning even during heavy lifting operations . A worn or poorly matched sprocket leads to track slippage, accelerated chain wear, and costly downtime. Our KH125 sprocket is built to prevent exactly that.
Key Specifications:
- Compatible Models: Hitachi KH125, KH125-2, KH125-3, KH125D, KH125-3CR hydraulic crawler cranes
- Type: Crawler crane drive sprocket / driving tumbler
- Material: High-strength 35SiMn / 40MnB / 50Mn alloy steel — selected for superior impact resistance and wear performance
- Manufacturing Process: Precision casting or forging → quenching & tempering → CNC machining → surface hardening
- Surface Hardness: HRC 48–58 (depending on material grade and heat treatment spec)
- Hardened Layer Depth: 5–8 mm (up to 8–12 mm for premium 40MnB/50Mn forged configuration)
- Tensile Strength: ≥ 1400 Rm N/mm²
- Impact Toughness: ≥ 20J
- Weight: Approx. 12.5 kg per sprocket (varies by sub-model configuration)
- Certification: ISO 9001:2008 / ISO 9001:2000
- Warranty: 6 months to 1 year / up to 2,500 working hours
- Color: Yellow or black (custom colors available)
Why Choose Our KH125 Sprocket?
Tough Core + Hard Tooth Surface: Our sprocket teeth are surface-hardened to HRC 48–58 with a 5–8 mm deep hardened layer . This combination delivers exceptional wear resistance on the tooth surface while maintaining a tough, impact-resistant core that won’t crack under the high torque and heavy loads of crawler crane travel and lifting operations.
- Reliable Power Transmission: Precisely machined teeth ensure accurate engagement with the track chain, reducing slippage and improving transmission efficiency . This results in smoother travel performance and better operational control — especially critical during heavy lifting and site positioning tasks.
- Optimized Tooth Profile: Accurate CNC machining guarantees stable, modification-free performance without adjustment . Perfect meshing with the track chain minimizes vibration and protects your entire undercarriage system — track links, rollers, and idlers.
- Heavy-Duty Construction: Manufactured from high-strength alloy steel (35SiMn / 40MnB / 50Mn) and enhanced by advanced heat treatment, the sprocket withstands continuous stress, heavy loads, and harsh working conditions without cracking, deformation, or premature wear .
- Superior Wear & Impact Resistance: The specially treated tooth surface resists abrasion caused by constant track engagement, significantly extending service life and reducing replacement frequency — lowering your maintenance costs and improving equipment uptime .
- Precision OEM Fitment: Designed according to OEM specifications for the Hitachi KH125 series, ensuring perfect compatibility and easy installation. No modification, no guesswork .
- Factory-Direct Value: Source straight from our production line — genuine-level OEM quality at a competitive aftermarket price, with no dealer markup. MOQ as low as 1 piece; sample orders and bulk wholesale both welcome .
- Complete Undercarriage Solution: We also supply track shoes, track pins, track bolts & nuts, track rollers (bottom & top), front idlers, and full track chain assemblies for the Hitachi KH125 series and 150+ other crawler crane models . One-stop sourcing for your whole undercarriage.
- Proven Global Track Record: Our undercarriage parts are exported to dealers and end-users across Europe, Southeast Asia, the Middle East, South America, North America, and South Africa — earning trust for durability and stability in the field .
Applications:
Designed for Hitachi KH125 series crawler cranes operating in construction sites, airport heavy projects, demolition sites, cargo loading/unloading, infrastructure development, and industrial material handling . The KH125 sprocket excels in muddy, rocky, or sandy terrain — wherever your crawler crane needs reliable travel and precise positioning under load.
Quality Assurance:
- ISO 9001 certified manufacturing with rigorous quality control at every stage
- Material verification — 35SiMn / 40MnB / 50Mn alloy steel meets international standards
- Heat treatment control — quenching & tempering ensures optimal surface hardness (HRC 48–58) with 5–8 mm case depth
- Mechanical property testing — tensile strength ≥ 1400 N/mm², impact toughness ≥ 20J verified by batch testing
- 100% pre-shipment inspection — tooth profile, dimensional accuracy, and bolt-hole pattern checked against OEM specifications
- Export-grade packaging — pallet packaging for safe worldwide transport
Fitment Note:
KH125 Series Has Multiple Sub-Models: The Hitachi KH125 family includes KH125, KH125-2, KH125-3, KH125D, and KH125-3CR — each with slight variations in sprocket hub geometry and tooth profile . Additionally, KH125 sprockets are often interchangeable with other Hitachi/Sumitomo models including KH100, KH180, KH230, and CX series . Before ordering, please confirm:
- Your crane’s exact model and serial number
- The part number on your existing sprocket (if available)
- Tooth count and hub dimensions
Share these details or photos of your existing sprocket, and our engineering team will verify the exact match for your machine.
Ordering & Support:
- MOQ: 1 piece (sample orders welcome)
- Supply Ability: 1,000+ pcs/month
- Lead Time: 15–30 work days for standard production; faster for in-stock items
- Payment: T/T (30% deposit, 70% before shipment), L/C, Western Union
- Trade Terms: FOB Xiamen / any port in China; CIF available
- Warranty: 6 months to 1 year / up to 2,500 working hours
- Fitment Verification: Technical support available to confirm dimensions and ensure perfect part matching
Order Your Durable Hitachi KH125 Sprocket Today!
Don’t let a worn drive tumbler compromise your crawler crane’s mobility and lifting precision. A failing sprocket causes track slippage, accelerates track chain and roller wear, and leads to costly downtime on critical 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
