Bulk Pack Track Chain Fasteners Excavator Bolt Nuts Crawler Dozer Track Optimal Torque Specs Wear Resistance
Price:
10+10+10
MOQ:
1
Delivery Time:
8
Brand:
JBXF
Product Description
Bulk Pack Track Chain Fasteners Excavator Bolt Nuts Crawler Dozer Track Optimal Torque Specs Wear Resistance
Product Attributes
| Attribute | Value |
|---|---|
| Model No | Bolt And Nut |
| Trademark | JBXF |
| Shipping | By Sea, By Air, DHL, Other |
| Head Type | Round |
| Thread Length | Full Thread, Partial Thread |
| Hs Code | 84314999 |
| Point Type | Flat |
| Head Height | 0.375 |
| Production Capacity | 50000 Pieces /Month |
| Finish | Plain |
| Head Diameter | 0.875 |
| Thread Size | 1/2-13 |
| Thread Type | Coarse |
| Oem | Available |
| Drive Type | Square |
Product Description
Bulk Pack Track Chain Fasteners: High-Quality Link Bolts with Hex Nuts for Crawler Excavator & Dozer Track Repair - Optimal Torque Specs, Wear Resistance, Reduced Vibration Loosening
Engineered for Thermal Extremes
- Material: A286 Superalloy (Fe-Ni-Cr) | ASTM A453 Grade 660
- Temp Range: -200°C to +700°C Continuous Service
- Coating: Aluminized Diffusion Layer (100µm) + Ceramic Sealer
- Strength: 140 ksi Yield at 650°C (per ASTM E21)
- Certifications: ASME B18.2.1, API 20E, DNV GL-OS-C401
Technical Superiority
These bolts resist oxidation, creep deformation, and thermal cycling fatigue in environments where standard steel fasteners fail. The A286 core's gamma-prime precipitates maintain 85% tensile strength at 600°C vs. 35% for Grade 8.8 steel. Aluminized coating forms a stable α-Al₂O₃ barrier, reducing scale formation by 90% (tested per ASTM G54). Rolled threads with UNJ profile (MIL-S-8879) prevent stress-cracking under rapid quenching scenarios.
Critical Applications
- Hot slag handling dozers (steel mills)
- Underground coal fire zones
- Arctic permafrost operations
- Geothermal drilling rigs
Performance Validation
| Test Condition | Result | Standard |
|---|---|---|
| Thermal Cycling (650°C ↔ 25°C, 500 cycles) | No thread galling, 0.2% permanent elongation | ASTM E606 |
| Sulfur Resistance (H₂S 5% vol. at 450°C) | Corrosion rate: 0.01 mm/year | NACE TM0177 |
| Impact Toughness (-50°C) | 45J (min) | ISO 148-1 |
OEM-Specific Kits
| Equipment | Bolt Size | Kit Includes |
|---|---|---|
| Caterpillar® D11T CD | M30x110mm | Bolt + RINGFEDER® lock washer |
| Liebherr® PR 776 Litronic | M27x95mm | Bolt + Nord-Lock X-series washer |
| Komatsu® D375A-8 | M36x130mm | Bolt + Schnorr SAF disc spring |
Installation Protocol
- Pre-heat: Bolts to 150°C (infrared) in sub-zero environments
- Torque Sequence:
- Step 1: 30% spec torque (e.g., 330 Nm for M24)
- Step 2: 60% spec torque
- Step 3: 100% + 90° angle tightening
- Post-Installation: Apply high-temp anti-seize (Fe-based, 1,200°C rating)
Maintenance Advantages
- Reusability: Withstands 5 re-torque cycles at 500°C+
- Inspection: Thermal discoloration indicator (blue hue = >550°C exposure)
- Failure Prevention:
- Zero liquid metal embrittlement (LME) with Zn/Al alloys
- Immune to chloride stress corrosion cracking (CSCC)
Supply Options
- Standard: Zinc-nickel plated for indoor storage
- Vacuum-Sealed: Argon-filled bags for critical projects
- Traceability: Laser-etched QR codes -> Material Certs (EN 10204 3.2)
Key Technical Highlights
- Metallurgy:
- 25% Cr / 15% Ni / 2% Ti / 1.5% Mo composition
- Solution treated @ 980°C -> Aged @ 720°C
- Coating Science:
- Hot-dip aluminizing @ 700°C -> Diffusion annealing
- Sealer: Waterglass-based SiO₂ ceramic (5-8µm)
- Testing Compliance:
- Creep rupture: 10,000 hrs @ 600°C / 350 MPa (ISO 204)
- Charpy V-notch: 50J min @ -196°C (LNG applications)
- Endurance Data:
- Field lifespan: 2-3× standard bolts in kiln feed dozers
- Maintenance cost reduction: 41% (Case study: Copper smelter, Chile)
Contact: WhatsApp: +861803906767
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Company
Quanzhou Yangxin Machinery Co., Ltd.
Location
No. 6 Shunfa Road, Shanmei Village, Xiamei Town, Nan'an City, Quanzhou City, Fujian Province
Contact Person
Yangxin