Dingtai manufactures Kobelco sprockets, the drive component that transfers track motor power to the track chain in Kobelco excavators.
We operate factory-direct with full OEM manufacturing services, supplying global distributors, rental fleets, and construction firms that require exact-fit replacement parts.
Worn sprockets accelerate track chain wear and cause slippage. Our hardened sprockets resist abrasion, extend undercarriage life, and reduce unplanned downtime.
With over 20 years of experience and ISO9001/SGS-certified processes, Dingtai delivers repeatable quality for demanding heavy equipment operations worldwide.
Each Kobelco sprocket uses 35MnB steel and deep quenching to achieve precise hardness, ensuring high impact strength and long service life.
Core Selling Points
- Global Brand Compatibility: Engineered for direct interchange with Kobelco SK series excavators, matching OEM tooth count, pitch, and bolt pattern for exact fit.
- Premium 35MnB Material: High-strength 35MnB alloy steel delivers superior impact toughness and wear resistance under demanding excavator loads and abrasive ground conditions.
- Deep Quenching/Heat Treatment: Induction hardening and deep quenching create 48-56 HRC tooth surface hardness while retaining a ductile core for impact resistance under load.
- 100% QC Inspection: Every sprocket undergoes dimensional checks, hardness testing, and visual inspection before shipment to prevent premature field failures and ensure fit.
Product Catalog
Our catalog of Kobelco sprockets includes various specifications, fully compatible with Kobelco SK series excavators and related crawler equipment.
Why Choose Dingtai?
1. Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB / 40Mn2 alloy steel |
| Hardness | 48-56 HRC tooth surface |
| Heat Treatment | Induction hardening / deep quenching |
| Process | Forging, CNC machining, precision hobbing |
| Certification | ISO9001 / SGS |
| Warranty | 12 months or 1,500 hours |
2. OEM & Customization
We match customer drawings, custom dimensions, and OEM standards to produce sprockets that integrate precisely with Kobelco undercarriages.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Mini Excavators | Kobelco | SK55, SK75, SK135 |
| Mid-size Excavators | Kobelco | SK200, SK210, SK230 |
| Large Excavators | Kobelco | SK350, SK480, SK850 |
4. Delivery & Logistics
We ship globally from China with factory-direct pricing, reliable export packaging, and flexible MOQ to support urgent replacement orders and scheduled fleet maintenance.
Technical Features
Sprocket teeth are induction-hardened to 48-56 HRC, creating a wear-resistant surface while retaining a tough core for impact resistance.
Precision-machined tooth profiles ensure smooth engagement with track links, reducing stress concentration and preventing premature chain elongation.
Optional sealed lubrication paths support extended service intervals in abrasive environments, minimizing metal-to-metal wear on the sprocket root.
Applications
- Mining and quarrying: sustained abrasive wear demands high-hardness sprocket teeth.
- Road construction and infrastructure: long-hour earthmoving with frequent travel cycles.
- General excavation and site preparation: compact and mid-size Kobelco excavators.
- Demolition and material handling: high-impact loads and frequent forward/reverse travel.
- Forestry and pipeline projects: tough undercarriage conditions with debris and uneven ground.
Frequently Asked Questions
1. What is your MOQ for Kobelco sprockets?
Stocked standard sprockets can be ordered from one piece. Custom OEM production generally starts at 10-50 pieces per specification.
2. What is the delivery time?
Stock items ship within 7-10 working days. Custom-manufactured sprockets normally ship within 25-35 days after drawing approval.
3. How deep is the heat treatment?
Effective induction hardening depth is typically 8-15 mm on sprocket tooth flanks, depending on profile and OEM requirements.
4. What warranty do you offer?
We provide a 12-month or 1,500-hour warranty against manufacturing defects under normal operating conditions and correct installation.
5. How do I match my Kobelco part number?
Send your OEM part number, drawing, or machine serial number. We cross-reference tooth count, pitch diameter, and bolt pattern to confirm interchange.
6. Do you provide OEM branding or neutral packaging?
Yes. We offer neutral packaging or custom logo marking for distributors and OEM replacement programs.
Maintenance Guide
- Inspect sprocket teeth for sharp points, wear steps, or reverse hooking every 500 service hours to detect abnormal wear early.
- Replace sprockets together with track chain to avoid mismatched pitch that accelerates wear on both components and shortens undercarriage service life.
- Set track tension to OEM specifications after installation; over-tightening increases sprocket and idler bearing loads and overheats components.
- Clean mounting surfaces and torque bolts to specified values before installation to prevent loosening, cracking, and bolt fatigue.
- Lubricate contact surfaces according to the service manual before returning the excavator to operation for proper break-in.