Product Overview
Dingtai manufactures Doosan bulldozer carrier rollers, precision components that support track link weight and maintain alignment in crawler undercarriage systems.
We offer factory-direct supply and comprehensive OEM manufacturing services to global distributors, equipment dealers, and heavy machinery procurement teams.
Our carrier rollers resist flange wear and impact shock, reducing unplanned downtime and preventing costly track derailment on demanding Doosan dozer jobsites.
With over 20 years of manufacturing experience and ISO9001/SGS-certified quality systems, Dingtai delivers consistent aftermarket components trusted by procurement veterans.
We use premium 35MnB steel and deep quenching heat treatment to achieve high surface hardness and extended service life under heavy loads.
Core Selling Points
- Premium 35MnB Material: Carrier rollers are forged from 35MnB steel, providing exceptional yield strength, impact toughness, and fatigue resistance for harsh undercarriage operations.
- Deep Quenching/Heat Treatment: Controlled heat treatment hardens the tread and flange surfaces, delivering uniform wear resistance and preventing premature spalling or deformation.
- OEM Capabilities: We manufacture to OEM drawings or physical samples, supporting custom dimensions, branded packaging, and strict tolerance control for Doosan undercarriages.
- 100% QC Inspection: Every batch undergoes dimensional checks, hardness testing, and visual inspection before shipment, ensuring zero-defect delivery and reliable field performance.
Product Grid
Our catalog of Doosan Bulldozer Carrier Roller products includes various specifications, fully compatible with Doosan excavators and bulldozers.
Why Choose Dingtai?
Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB forged steel |
| Hardness (HRC) | 50–55 HRC on tread and flange |
| Heat Treatment Depth | 4–8 mm deep quenching |
| Process | Precision forging, CNC machining, quenching, tempering |
| Certification | ISO9001:2015 / SGS |
| Warranty | 12 months or 2,000 hours, whichever comes first |
OEM & Customization
We match OEM drawings, serial numbers, and sample dimensions, manufacturing precise bore, diameter, and flange profiles to original Doosan specifications.
Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Bulldozer / Crawler Dozer | Doosan | DD80, DD100, DD130 series |
| Crawler Excavator | Doosan | DX225LC, DX300LC, DX340LC |
Delivery & Logistics
We ship worldwide with reliable ocean and express options, factory-direct pricing, and flexible MOQ from sample orders to full container loads.
Technical Features
Each carrier roller uses a lifetime-lubricated floating seal, keeping grease in and preventing abrasive dirt, water, and sand from entering the shaft.
The shaft and bushing interface is induction hardened to reduce friction and wear. This bimetal support extends service intervals and prevents shaft galling.
Deep quenched tread and flange zones achieve uniform hardness without brittleness, absorbing impact shock while resisting abrasive wear in rock and gravel.
Applications
- Mining and quarrying
- Road construction
- Land clearing and forestry
- Demolition and site preparation
- Large-scale earthmoving
Frequently Asked Questions
Q1: What is the minimum order quantity for Doosan carrier rollers?
Sample orders are accepted. Standard production MOQ is 4–10 units depending on model; larger quantities receive factory-direct pricing.
Q2: How long is delivery time?
Stocked standard models ship within 7–10 days. Custom OEM production typically requires 20–35 days after drawing confirmation.
Q3: What heat treatment depth do you achieve?
Tread and flange hardening depth is 4–8 mm, with surface hardness commonly 50–55 HRC depending on material and model.
Q4: What warranty policy applies?
A 12-month or 2,000-hour warranty covers manufacturing defects under normal operating conditions. Wear parts are excluded from abuse.
Q5: Can you match Doosan OEM part numbers?
Yes, we match original part numbers, drawings, or physical samples. Send casting numbers for fast verification and quotation.
Q6: Do you provide custom branding?
Yes, neutral packaging or customer brand marking is available for qualified OEM and distributor orders.
Q7: Are these compatible with Doosan excavators too?
Yes, many carrier rollers fit both Doosan crawler dozers and excavator undercarriages. Confirm serial number before ordering.
Maintenance Guide
- Inspect roller tread, flanges, and mounting bolts every 250 service hours; look for uneven wear, cracks, or oil leakage.
- Verify track tension and carrier roller alignment during installation; improper tension accelerates flange wear and shaft fatigue.
- Replace carrier rollers when flange thickness wears below 20% of original or when rolling resistance increases significantly.
- Clean mounting surfaces and torque bolts to OEM specifications; recheck torque after the first 50 operating hours.