Dingtai manufactures Doosan sprockets, critical undercarriage components that transfer final drive torque into the track chain for reliable traction and machine mobility.
We operate as a factory-direct manufacturer, providing full OEM production and custom sprocket machining for global equipment distributors and fleet maintenance networks.
Our Doosan sprockets resist premature tooth wear and breakage, preventing costly undercarriage downtime and extending the service life of your excavator fleet.
With over 20 years of undercarriage manufacturing experience and ISO9001/SGS certified processes, we deliver consistent quality and repeatable replacement part performance.
Each sprocket uses 35MnB steel and deep quenching heat treatment to achieve high surface hardness, impact resistance, and long-term wear performance in demanding conditions.
Core Selling Points
- Premium 35MnB Material: High-strength alloy steel provides excellent hardenability and impact toughness, reducing sprocket tooth cracking under heavy excavator loads.
- Deep Quenching/Heat Treatment: Tooth surfaces are hardened to 48-55 HRC with controlled case depth, balancing wear resistance and core strength.
- Precision Forging/Casting: Near-net-shape forging and CNC machining ensure accurate tooth profile, pitch, and bolt hole alignment for direct fitment.
- 100% QC Inspection: Every sprocket undergoes dimensional checks, hardness testing, and magnetic particle inspection before final packaging and shipment.
Product Grid
Our catalog of Doosan Sprocket includes various specifications, fully compatible with Doosan excavators and bulldozers.
Why Choose Dingtai?
Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB alloy steel |
| Tooth Surface Hardness | 48-55 HRC |
| Heat Treatment | Deep quenching / induction hardening |
| Manufacturing Process | Precision forging, CNC machining, heat treatment |
| Certification | ISO9001, SGS |
| Warranty | 12 months or 2,000 hours against manufacturing defects |
OEM & Customization
We match original drawings, custom dimensions, and OEM standards to ensure direct replacement compatibility across Doosan track systems without field modification.
Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Crawler Excavator | Doosan | DH220-5, DH300-7, DX225LC, DX300LC |
| Crawler Excavator | Doosan | DX340LC, DX380LC, DX420LC, DX480LC |
| Large Excavator | Doosan | DX520LC, DX700LC, Solar 500LC-V |
Delivery & Logistics
We offer factory-direct pricing, reliable ocean freight, and flexible order quantities from one unit, supporting quick inventory replenishment for North American equipment fleets.
Technical Features
Sprocket teeth are precision machined to match Doosan track chain pitch, ensuring smooth engagement, reduced impact loading, and lower vibration during swing and travel operations.
Deep quenching creates a hard tooth surface while maintaining a tough core, preventing sprocket tooth deformation and fatigue cracks under high torque and abrasive conditions.
Optional induction hardening on tooth flanks further improves wear resistance in high-abrasion applications such as mining and quarrying.
Applications
- Mining: Sprockets for Doosan excavators working in hard rock and high-impact loading conditions.
- Road Construction: Undercarriage components for excavators used in subgrade preparation, trenching, and material handling.
- Quarrying: Heavy-duty sprockets that withstand abrasive dust, rock fines, and continuous production cycles.
- Demolition: High-strength sprockets for Doosan machines operating on rough, unstable ground with frequent track loading.
Frequently Asked Questions
1. What is the minimum order quantity for Doosan sprockets?
One unit for stock verification; volume pricing begins at 10 units.
2. How long is delivery?
Standard delivery is 15-30 days after deposit, depending on quantity and custom requirements.
3. What heat treatment depth do you use?
Tooth surface hardness reaches 48-55 HRC, with effective case depth of 6-10 mm depending on model.
4. What warranty policy applies?
We provide 12 months or 2,000 operating hours against material and manufacturing defects.
5. Can you match my existing part number?
Yes, send your OEM part number or drawing, and we will cross-reference or reverse engineer the sprocket.
6. Are your sprockets compatible with genuine Doosan undercarriage systems?
Yes, all sprockets are manufactured to OEM dimensional specifications for direct bolt-on replacement.
Maintenance Guide
- Inspect Tooth Profile Every 500 Hours: Check for pointed teeth, cracks, or uneven wear; compare with new profile to assess remaining life.
- Monitor Track Tension: Maintain manufacturer-recommended track sag; improper tension accelerates sprocket tooth wear and track pitch elongation.
- Replace at Wear Limit: Change sprocket when tooth tips become sharp or track pitch elongation exceeds 3% of original pitch.
- Torque Bolts Correctly: Use calibrated torque wrench and follow OEM bolt torque specifications to prevent sprocket loosening.