Dingtai manufactures replacement Sumitomo track rollers, critical undercarriage components that support excavator weight and guide track chain movement under load.
We operate as a factory-direct supplier, providing complete OEM manufacturing services from forging and machining to assembly for global equipment distributors.
Our rollers resist premature flange wear, seal leakage, and shaft failure, reducing downtime and lowering total undercarriage operating costs in severe service conditions.
With over 20 years of manufacturing experience and ISO9001/SGS-certified quality systems, Dingtai consistently delivers dimensional accuracy, hardness control, and repeatable service life.
Each roller uses 35MnB steel and deep quenching to achieve high surface hardness while retaining core toughness for impact resistance.
Core Selling Points
- Premium 35MnB Material: Forged 35MnB steel shells provide high tensile strength and resistance to impact, bending, and abrasive wear under excavator track loads.
- Deep Quenching/Heat Treatment: Deep quenching and tempering achieve HRC 50-55 hardness on tread and flange, extending roller life in abrasive, high-load operations.
- Global Brand Compatibility: Precision machining matches Sumitomo OEM mounting dimensions, ensuring direct replacement fit on SH120 through SH480 series excavators without modification.
- ISO9001/SGS Certified: Every batch undergoes 100% dimensional and hardness inspection under ISO9001/SGS procedures, ensuring consistent quality and traceability for procurement teams.
Our catalog of Sumitomo Track Roller includes various specifications, fully compatible with Sumitomo excavators and bulldozers.
Why Choose Dingtai?
1. Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB forged steel |
| Hardness | HRC 50-55 |
| Heat Treatment | Deep quenching and tempering |
| Process | Precision forging, CNC machining, assembly |
| Certification | ISO9001, SGS |
| Warranty | 12 months / 2,000 working hours |
2. OEM & Customization
We manufacture from customer drawings or samples, matching OEM dimensions, hardness, and seal specifications for reliable Sumitomo undercarriage fitment.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Hydraulic Crawler Excavator | Sumitomo | SH120, SH160, SH200, SH210, SH220, SH240, SH260, SH300, SH350, SH480 |
4. Delivery & Logistics
Factory-direct pricing and flexible MOQ support distributor stock. We ship from Quanzhou with export packaging via reliable sea freight on schedule.
Technical Features
Track roller shells are forged from 35MnB steel and deep-quenched to create a hardened wear surface that resists spalling under repeated track chain contact.
Floating seal groups retain lubrication and exclude abrasive dirt, while precision bimetal bushings reduce friction and maintain stable roller rotation.
Internal oil circulation cools the roller during rotation, preventing dry sliding wear between shaft and bushing and extending maintenance intervals.
Applications
- Mining and quarrying
- Road construction and site preparation
- Heavy demolition and material handling
- Earthmoving and infrastructure development
Frequently Asked Questions
Q1: What is the MOQ for Sumitomo track rollers?
A: MOQ is typically 4 pieces per specification; mixed model orders are accepted for initial distributor trials.
Q2: What is the delivery time?
A: Standard delivery takes 15-25 days after order confirmation; OEM production requires 25-35 days depending on quantity.
Q3: What heat treatment depth do the rollers have?
A: Hardened depth on tread and flange typically reaches 8-12 mm after deep quenching, depending on roller diameter.
Q4: What warranty policy do you provide?
A: We provide a 12-month or 2,000-working-hour warranty against manufacturing defects under normal operating conditions.
Q5: Can you match Sumitomo OEM part numbers?
A: Yes, our engineering team cross-references Sumitomo OEM part numbers and verifies dimensions before production.
Q6: Do you offer sample orders?
A: Yes, sample orders are available for evaluation; sample freight is typically handled by the buyer.
Maintenance Guide
- Before installation, verify mounting bolt holes and frame alignment, then torque bolts to Sumitomo specifications to prevent flange stress.
- After 50 initial working hours, recheck mounting torque and inspect for oil leakage, abnormal wear, or excessive heat.
- Monitor track sag during operation; incorrect track tension accelerates tread wear and may overload roller flanges.
- Replace rollers when tread wear exceeds OEM limits or oil leakage indicates floating seal failure to avoid track chain damage.