Dingtai manufactures complete Sumitomo track groups, the load-bearing assembly that transfers machine weight and drives crawler movement in undercarriage systems.
We supply factory-direct replacement track groups with full OEM service, covering custom shoe width, link pitch, and bolt-on installation worldwide.
These assemblies prevent premature downtime by resisting wear, pitch elongation, and shoe loosening under high-impact, abrasive job-site conditions.
With 20+ years in undercarriage manufacturing and ISO9001/SGS-certified processes, Dingtai delivers consistent quality for replacement and OEM builds.
Track links use 35MnB steel with deep induction quenching and tempered bushings to achieve high surface hardness and impact fatigue strength.
Core Selling Points
- 20+ Years Experience: Dingtai has produced heavy equipment undercarriage parts for over two decades, serving replacement and OEM customers with stable batch quality.
- Global Brand Compatibility: Track groups are engineered for direct interchange with Sumitomo excavator series and other Asian-brand machines, reducing sourcing complexity.
- Premium 35MnB Material: Track links are forged from 35MnB steel, giving higher tensile strength, better impact resistance, and longer service life than standard carbon steel.
- Deep Quenching/Heat Treatment: Induction hardening and precise tempering create a hard wear surface while maintaining a tough core in links, pins, and bushings.
Product Catalog
Our catalog of Sumitomo Track Group includes various specifications, fully compatible with Sumitomo excavators and bulldozers.
Why Choose Dingtai?
Production Technical Parameters
| Component | Material | Hardness / HRC | Process | Certification / Warranty |
|---|---|---|---|---|
| Track Link | 35MnB steel | 48–56 HRC surface | Precision forging + induction hardening | ISO9001 / 12 months |
| Track Shoe | 23MnB / 25MnB | 38–45 HRC | Hot-rolled / forged, quenched | SGS / 12 months |
| Pin | 50Mn | 58–62 HRC | Centerless ground + quench | ISO9001 / 12 months |
| Bushing | 50Mn / 20Mn | 52–60 HRC case | Induction hardening | SGS / 12 months |
OEM & Customization
We produce track groups from customer drawings or samples, matching pitch, shoe width, and mounting dimensions to Sumitomo OEM specifications.
Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Hydraulic Excavator | Sumitomo | SH120-6, SH200-6, SH210-6, SH220-6, SH240-6, SH300-6, SH350-6, SH480HD-6 |
| Hydraulic Excavator | Sumitomo | SH125X-6, SH130-6, SH460HD-6 |
Delivery & Logistics
We offer flexible MOQ, factory-direct pricing, and reliable export packaging. Shipments depart from Quanzhou by container or LCL to major ports.
Technical Features
Forged 35MnB links undergo controlled induction hardening, creating a deep wear-resistant case while retaining a ductile core for impact.
Precision-ground pins and bushings maintain tight clearances and case depths up to 4–6 mm, delaying internal dry wear and pitch extension.
Bolt-on shoe interfaces and pre-stressed pin/boss fits reduce loosening and cracking during constant vibration and heavy bucket loading.
Applications
- Open-pit and underground mining
- Quarry and aggregate production
- Heavy road and highway construction
- Demolition and material handling
- Forestry and land clearing
Frequently Asked Questions
What is the MOQ for Sumitomo track groups?
Sample orders from one set are accepted; volume pricing starts at four sets per specification.
How long is delivery?
Standard production takes 15–30 days after drawing confirmation and deposit, depending on order quantity and current line capacity.
What is the heat treatment depth?
Bushings and links typically achieve a case depth of 4–6 mm with surface hardness of 48–62 HRC depending on part number.
Do you match original part numbers?
Yes. We cross-reference Sumitomo OEM part numbers and verify pitch, link count, and shoe width before production.
What warranty is provided?
We provide a 12-month or 2,000-hour limited warranty against material and workmanship defects under normal use.
Can you produce custom track groups?
Yes. We manufacture to customer drawings or physical samples, including non-standard shoe plates and rail heights.
Maintenance Guide
- Pre-installation inspection: Check pitch, link count, and shoe bolt torque before mounting to prevent misalignment.
- Run-in: Operate at low load for 2–3 hours, then retorque track shoe bolts to specified values.
- Wear monitoring: Measure pin/bushing clearance and link height every 250 hours; replace before internal wear exceeds OEM limits.
- Storage: Keep tracks off wet ground, apply rust inhibitor to machined surfaces, and rotate stock semi-annually.