Top Description
Dingtai manufactures Caterpillar carrier rollers engineered to support track weight and maintain alignment on mid-to-large excavators and bulldozers.
We provide direct factory OEM service with full technical documentation, tailored to replacement market distributors and heavy equipment fleets.
Our carrier rollers prevent derailment and uneven track wear by maintaining structural integrity under continuous high-load, high-vibration operating conditions.
With 20+ years of dedicated production, we hold ISO9001 and SGS certifications, ensuring batch-to-batch consistency for long-term fleet maintenance.
We utilize 35MnB steel and deep induction quenching on the tread surface to achieve durable wear resistance far exceeding standard aftermarket parts.
Core Selling Points
- Premium 35MnB Material: Forged from 35MnB alloy steel, the roller shell provides high toughness and tensile strength to prevent cracking under impact loads.
- Deep Quenching/Heat Treatment: Tread surfaces receive medium-frequency induction hardening, achieving a hardened layer depth of 4-7mm for extreme longevity.
- Global Brand Compatibility: Precision-machined to match Caterpillar specifications, ensuring direct bolt-on installation without modifications to the track frame.
- 100% QC Inspection: Every carrier roller passes rigorous dimensional checks and ultrasonic flaw detection before dispatch, ensuring zero-defect delivery.
Product Grid Intro
Our catalog of Caterpillar Carrier Rollers includes various specifications, fully compatible with Caterpillar excavators and bulldozers.
Why Choose Dingtai?
1. Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB Alloy Steel |
| Hardness (HRC) | 50-55 HRC (Tread Surface) |
| Process | Hot Forging + Medium Frequency Quenching |
| Certification | ISO9001, SGS |
| Warranty | 12 Months or 2,000 Hours |
2. OEM & Customization
We produce carrier rollers based on supplied drawings or original samples. Critical dimensions, shaft mounting, and bracket alignment adhere strictly to OEM standards.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Excavator | Caterpillar | 320, 330, 336, 349 |
| Bulldozer | Caterpillar | D6, D8, D9 |
4. Delivery & Logistics
We dispatch via sea freight to major US ports. Factory-direct pricing applies, with flexible MOQs to support both container orders and trial stock.
Technical Features
The carrier roller uses a floating seal system. Two metal rings seal against a rubber O-ring, maintaining oil retention while blocking abrasive external contaminants.
The shaft is supported by a bimetal bushing, self-lubricated through internal oil circulation. This reduces friction heat and eliminates the need for frequent greasing.
Applications
- Open-pit Mining
- Heavy Earthmoving
- Road Construction
- Marble and Granite Quarrying
- Forestry and Land Clearing
Frequently Asked Questions
- What is the minimum order quantity for Cat carrier rollers?
- MOQ starts at 4 units for standard models, with mixed loading allowed across different part numbers.
- What is the delivery time?
- Standard production lead time is 20-25 days. Stock availability for popular models may enable immediate dispatch.
- Can Dingtai match specific Cat part numbers?
- Yes. Provide the OEM part number (e.g., 227-6126), and our engineering team verifies exact dimensional and mounting compatibility.
- What is the hardening depth on the roller tread?
- Our induction quenching process achieves a minimum effective hardening depth of 4mm, with hardness graded to maintain core ductility.
- What warranty covers these carrier rollers?
- A 12-month or 2,000-hour warranty covers manufacturing defects. Warranty does not cover wear from track misalignment or improper installation.
- Are installation instructions provided?
- Standard mounting torque specifications are included. We recommend matching new carrier rollers with correctly tensioned tracks to prevent premature wear.
- Are the carrier rollers lubricated for life?
- Yes, our sealed and lubricated design requires no field greasing. Internal oil is a lifetime fill lasting the full service interval of the component.
Maintenance Guide
- Visually inspect the roller for oil leaks or physical damage prior to every machine shift.
- Rotate the roller by hand during track maintenance to check for free movement without excessive radial play.
- Replace carrier rollers immediately if sharp flange wear or metal-to-metal contact is observed.
- Ensure dual rollers on the same side are replaced simultaneously to maintain uniform track load distribution.