Dingtai manufactures Kato carrier rollers, also known as top rollers, engineered to stabilize the upper track frame and maintain alignment.
We operate as a factory-direct China supplier, offering complete OEM production services for Kato-compatible undercarriage parts to global dealers.
Our carrier rollers resist premature wear and flange failure, reducing track misalignment downtime and protecting your total undercarriage investment.
With over 20 years of manufacturing experience and ISO9001/SGS-certified quality systems, Dingtai supplies consistent, audit-ready components for industrial buyers.
Each roller uses precision-forged 35MnB steel and deep induction hardening to deliver high load capacity and long service life.
Core Selling Points
- Global Brand Compatibility: We produce Kato carrier rollers matching OEM part numbers, bolt patterns, and mounting dimensions for HD Series excavators worldwide.
- Premium 35MnB Material: Roller shells are forged from 35MnB steel, providing a hardened wear surface and high core toughness under shock loads.
- Deep Quenching/Heat Treatment: Induction hardening achieves HRC 52–58 with a 3–5 mm case depth on the tread surface for extended wear resistance.
- 100% QC Inspection: Every carrier roller undergoes 100% dimensional inspection, hardness testing, and seal leak verification prior to export packaging. This ensures zero-defect delivery.
Product Grid
Our catalog of Kato Carrier Rollers includes various specifications, fully compatible with Kato hydraulic excavator models.
Why Choose Dingtai?
Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB forged steel / 40Mn2 optional |
| Hardness | HRC 52–58 tread surface |
| Heat Treatment | Deep induction hardening, case depth 3–5 mm |
| Manufacturing Process | Precision forging, CNC machining, grinding, assembly |
| Certification | ISO9001, SGS |
| Warranty | 12 months or 2,000 working hours |
OEM & Customization
We match original Kato drawings or samples, customizing dimensions, bolt patterns, and branding while strictly adhering to OEM undercarriage standards.
Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Small Excavator | Kato | HD250, HD308US |
| Medium Excavator | Kato | HD512, HD514, HD700, HD820 |
| Large Excavator | Kato | HD1023, HD1430 |
Delivery & Logistics
Factory-direct pricing supports flexible MOQ. We ship via ocean freight, rail, or express. Standard production completes within 15–25 days after deposit.
Technical Features
Each carrier roller assembly uses a precision-forged shell and a sealed, maintenance-free bearing arrangement. This design supports constant upper track load.
Deep induction hardening creates a hard tread surface while retaining a tough core, preventing spalling and uneven wear under high pressure.
Floating seal technology blocks abrasive dirt and moisture ingress, protecting bearing lubrication in high-debris excavation environments.
Applications
- Mining
- Road Construction
- Quarrying
- Demolition and Site Development
- Excavation and Utility Contracting
Frequently Asked Questions
A: MOQ is one piece for sample testing. Bulk pricing is negotiable based on quantity and mixed model packing.
A: Standard production takes 15–25 days after deposit confirmation. Shipping time depends on destination port and freight method.
A: We use 35MnB forged steel with induction hardening to HRC 52–58 and a case depth of 3–5 mm on the tread surface.
A: We provide a 12-month or 2,000-working-hour warranty against manufacturing defects, excluding normal wear, impact damage, or misuse.
A: Yes. Send the OEM part number, drawing, or sample. We cross-reference dimensions and bolt patterns before production.
A: Yes. We can apply your logo, part number, and packaging with full OEM documentation.
A: Provide the Kato model and serial number. Our engineers verify the mounting dimension and part number.
Maintenance Guide
- Inspect roller treads every 250 working hours for flat spots, cracks, or flange wear. Replace damaged carrier rollers before track misalignment increases.
- Confirm mounting bolts remain tight to factory torque specifications. Loose carrier roller bolts cause vibration, abnormal wear, and stress on the track frame.
- Check seal area for oil leakage every 500 hours. Oil leaks indicate floating seal damage and require immediate replacement to prevent bearing failure.
- Replace carrier rollers in matched pairs or complete sets. This maintains equal track support, reduces chain wear, and prevents premature idler or sprocket replacement.