Top Description
We manufacture heavy‑duty Komatsu track rollers that guide the track chain and support the full machine weight in demanding applications.
Factory-direct supply with complete OEM manufacturing services ensures exact dimensional accuracy and reliable quality for global buyers.
Premium rollers prevent premature track stretch, eliminate idler misalignment, and cut unplanned downtime on excavators and bulldozers.
Over 20 years of undercarriage expertise is backed by ISO9001 and SGS certifications, delivering consistent, repeatable part performance.
35MnB steel, combined with deep induction hardening to 50‑55 HRC, gives the roller shell extreme wear resistance and impact strength.
Core Selling Points
- 20+ Years Experience – Two decades specializing in undercarriage manufacture mean refined metallurgy, tighter tolerances, and failure‑proof design.
- Premium 35MnB Material – High‑strength 35MnB alloy steel provides superior fatigue life and resists spalling under constant shock loading.
- Deep Quenching / Heat Treatment – Tread and flange surfaces receive deep induction hardening, yielding a hardened layer that withstands brutal abrasive wear.
- 100% QC Inspection – Every roller is pressure‑tested for seal integrity and dimensionally checked before shipment to eliminate field infant mortality.
Product Grid Intro
Our catalog of Komatsu Track Rollers includes various specifications, fully compatible with Komatsu excavators and bulldozers.
Why Choose Dingtai?
1. Production Technical Parameters
| Material | 35MnB alloy steel |
|---|---|
| Hardness (HRC) | 50–55 (surface) |
| Process | Hot forging, deep induction hardening, tempered |
| Certification | ISO9001, SGS |
| Warranty | 12 months / 2000 hours under normal use |
2. OEM & Customization
We manufacture exactly to your drawings or OEM specifications, offering custom dimensions and branding while maintaining 100% form‑fit‑function equivalence.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series / Models |
|---|---|---|
| Excavator | Komatsu | PC200‑7/‑8, PC300‑7/‑8, PC400‑7/‑8, PC220 |
| Bulldozer | Komatsu | D65, D85, D155, D375 |
4. Delivery & Logistics
Factory-direct pricing, reliable sea freight, and an MOQ that supports both trial orders and volume programs keep your inventory pipeline lean and predictable.
Technical Features
Floating metal‑face seals create a permanent lubrication chamber, holding oil in and abrasive dirt out, which triples bearing life compared to open designs.
A bimetal bushing with a steel back and sintered bronze lining provides high load capacity while maintaining a low‑friction oil film under static and dynamic loads.
Deep hardness penetration of 4‑6 mm on the tread surface prevents case crushing and ensures the roller maintains its profile even after thousands of operating hours.
Applications
- Surface mining and quarrying
- Heavy highway and road construction
- Forestry and land clearing
- Demolition and scrap handling
- Large‑scale earthmoving and infrastructure
Frequently Asked Questions
- What is the minimum order quantity for Komatsu track rollers?
- MOQ depends on the model and current production schedule, but typically 2–4 pieces for standard items. Mixed containers are accepted.
- How deep is the heat treatment on the roller shell?
- Deep induction hardening penetrates 4–6 mm, delivering a 50–55 HRC surface that resists abrasion and plastic deformation.
- What warranty do you provide?
- 12 months or 2,000 operating hours against manufacturing defects under normal application conditions.
- Can you match an existing part number?
- Yes. Send your OEM or competitor part number, and we will cross‑reference to the correct Dingtai roller and confirming dimensions.
- Do you offer OEM branding?
- We provide full OEM services, including private labeling, customized housings, and packaging exactly to your specifications.
- How quickly can you ship?
- Stock rollers ship within 3–5 working days. Custom production typically requires 25–35 days depending on order size.
- What materials are used for the shaft and bushing?
- The shaft is 40Cr or equivalent alloy steel; the bushing is a bimetal steel‑backed sintered bronze composite for high‑load, low‑wear performance.
Maintenance Guide
- Check the oil level sight glass or plug weekly; low oil indicates seal failure and requires immediate replacement.
- Inspect tread wear and flange thickness monthly; replace when wear exceeds 20% of original profile to protect the rail.
- Always pressure‑test the rebuilt roller after seal replacement to confirm zero leakage before returning to service.