China OEM Undercarriage Parts Manufacturer - Qiansheng

Single flange track rollers are designed for standard excavators operating on flat or moderately uneven terrain. They allow slight lateral track movement, reducing stress on the undercarriage frame.

Double flange track rollers have flanges on both sides, providing maximum lateral guidance. They are recommended for:

• Heavy-duty mining operations
• Sloped or rocky terrain
• Long-track excavators (e.g., PC200, CAT320D)
• Machines with high travel speed requirements

📌 Qiansheng recommendation: For most 20-30 ton excavators, we recommend double flange on the outer positions and single flange on inner positions for optimal balance.

Standard MOQ: 50 pieces per part number (mix models accepted).

OEM logo MOQ: 200 pieces per part number for laser engraving or casting with your brand.

Sample order: 1-5 pieces available for quality testing – we can ship via DHL/FedEx within 7 days.

📌 For distributors signing annual contracts, MOQ can be reduced to 30 pieces per shipment. Contact us to discuss your volume.

5 warning signs of a failing track adjuster grease cylinder:

• 🔴 Track keeps loosening after adjustment
• 🔴 Grease leaking from the cylinder body or valve
• 🔴 Unable to build pressure when greasing
• 🔴 Visible rust or pitting on the chrome rod
• 🔴 Track derails frequently during turning

📌 Preventive tip: Replace grease cylinders every 4,000-5,000 operating hours or immediately when leakage is detected to avoid track chain and sprocket damage.

Our 3-stage heat treatment process ensures maximum wear resistance:

• 1. Induction hardening – Surface hardness reaches HRC 52-56, depth 4-6mm
• 2. Tempering – Relieves internal stress, prevents cracking under impact
• 3. Controlled cooling – Ensures uniform hardness across the entire roller

📌 Quality guarantee: We perform hardness testing on every batch using a Rockwell hardness tester. Test reports are available upon request.

Yes, we provide a tiered warranty structure:

• Standard warranty: 12 months against manufacturing defects
• Extended warranty: 18 months for bulk orders (200+ pieces)
• Mining/Heavy-duty: 6 months under extreme conditions (subject to application review)

📌 What's covered: Material defects, seal failure, premature wear due to improper heat treatment. Normal wear and tear from abrasive materials is excluded.

Yes, sample orders are welcome.

Sample process:

1. Select part number and quantity (1-5 pieces recommended)
2. We provide proforma invoice with sample cost + shipping (DHL/FedEx/UPS)
3. Production takes 5-7 working days
4. Sample cost is fully refundable on your first bulk order of 100+ pieces

📌 Free sample policy: For first-time customers ordering 200+ pieces, we ship up to 2 samples free of charge (excludes freight).

Lead times by order type:

• Stock items: 3-7 days (Komatsu PC200, CAT320, Hitachi ZX200 common models)
• Non-stock standard parts: 15-20 days
• OEM/custom parts: 25-35 days (including mold/fixture making)
• Bulk orders (500+ pieces): 40-45 days

📌 Express option: Add 15% rush fee for 50% lead time reduction (subject to production schedule).

To identify the correct track roller, provide us with ONE of the following:

• Option 1: OEM part number (e.g., 20Y-30-00014 for Komatsu PC200)
• Option 2: Machine model and year (e.g., CAT 320D, 2012)
• Option 3: Measurements: Bolt hole spacing, shaft diameter, overall length
• Option 4: Clear photo of the existing roller

📌 Quick tip: Most 20-25 ton excavators use 6-7 bottom rollers per side. Count yours and send us the number for cross-reference.